:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08);
  /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08);
  /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08);
  /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08);
  /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08);
  /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08);
  /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08);
  /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08);
  /* Light cyan */

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    /* RGB versions for opacity control (Dark Mode) */
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    /* Background color tokens (Dark Mode) */
    --color-bg-1: rgba(29, 78, 216, 0.15);
    /* Dark blue */
    --color-bg-2: rgba(180, 83, 9, 0.15);
    /* Dark yellow */
    --color-bg-3: rgba(21, 128, 61, 0.15);
    /* Dark green */
    --color-bg-4: rgba(185, 28, 28, 0.15);
    /* Dark red */
    --color-bg-5: rgba(107, 33, 168, 0.15);
    /* Dark purple */
    --color-bg-6: rgba(194, 65, 12, 0.15);
    /* Dark orange */
    --color-bg-7: rgba(190, 24, 93, 0.15);
    /* Dark pink */
    --color-bg-8: rgba(8, 145, 178, 0.15);
    /* Dark cyan */

    /* Semantic Color Tokens (Dark Mode) */
    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: var(--color-teal-800);
    --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
    --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
    --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.3);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
    --color-btn-primary-text: var(--color-slate-900);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

    /* Common style patterns - updated for dark mode */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for dark mode */
    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
}

/* Data attribute for manual theme switching - :root prefix for higher specificity */
:root[data-theme="dark"] {
  /* RGB versions for opacity control (dark mode) */
  --color-gray-400-rgb: 119, 124, 124;
  --color-teal-300-rgb: 50, 184, 198;
  --color-gray-300-rgb: 167, 169, 169;
  --color-gray-200-rgb: 245, 245, 245;

  /* Colorful background palette - Dark Mode */
  --color-bg-1: rgba(29, 78, 216, 0.15);
  /* Dark blue */
  --color-bg-2: rgba(180, 83, 9, 0.15);
  /* Dark yellow */
  --color-bg-3: rgba(21, 128, 61, 0.15);
  /* Dark green */
  --color-bg-4: rgba(185, 28, 28, 0.15);
  /* Dark red */
  --color-bg-5: rgba(107, 33, 168, 0.15);
  /* Dark purple */
  --color-bg-6: rgba(194, 65, 12, 0.15);
  /* Dark orange */
  --color-bg-7: rgba(190, 24, 93, 0.15);
  /* Dark pink */
  --color-bg-8: rgba(8, 145, 178, 0.15);
  /* Dark cyan */

  /* Semantic Color Tokens (Dark Mode) */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-error: var(--color-red-400);
  --color-success: var(--color-teal-300);
  --color-warning: var(--color-orange-400);
  --color-info: var(--color-gray-300);
  --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
  --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

  /* Common style patterns - updated for dark mode */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for dark mode */
  --color-success-rgb: var(--color-teal-300-rgb);
  --color-error-rgb: var(--color-red-400-rgb);
  --color-warning-rgb: var(--color-orange-400-rgb);
  --color-info-rgb: var(--color-gray-300-rgb);
}

:root[data-theme="light"] {
  /* RGB versions for opacity control (light mode) */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: var(--color-teal-500-rgb);
  --color-error-rgb: var(--color-red-500-rgb);
  --color-warning-rgb: var(--color-orange-500-rgb);
  --color-info-rgb: var(--color-slate-500-rgb);
}

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

a:hover {
  color: var(--color-primary-hover);
}

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--primary:active {
  background: var(--color-primary-active);
}

.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-text);
}

.btn--secondary:hover {
  background: var(--color-secondary-hover);
}

.btn--secondary:active {
  background: var(--color-secondary-active);
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover {
  background: var(--color-secondary);
}

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-theme */
[data-theme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-theme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(var(--color-success-rgb, 33, 128, 141),
      var(--status-bg-opacity));
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(var(--color-error-rgb, 192, 21, 47),
      var(--status-bg-opacity));
  color: var(--color-error);
  border: 1px solid rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(var(--color-warning-rgb, 168, 75, 47),
      var(--status-bg-opacity));
  color: var(--color-warning);
  border: 1px solid rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(var(--color-info-rgb, 98, 108, 113),
      var(--status-bg-opacity));
  color: var(--color-info);
  border: 1px solid rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: var(--space-4);
}

.gap-8 {
  gap: var(--space-8);
}

.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}

.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}

.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}

.hidden {
  display: none;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Dark mode specifics */
[data-theme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2') format('woff2');
}

/* END PERPLEXITY DESIGN SYSTEM */

:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08);
  --color-bg-2: rgba(245, 158, 11, 0.08);
  --color-bg-3: rgba(34, 197, 94, 0.08);
  --color-bg-4: rgba(239, 68, 68, 0.08);
  --color-bg-5: rgba(147, 51, 234, 0.08);
  --color-bg-6: rgba(249, 115, 22, 0.08);
  --color-bg-7: rgba(236, 72, 153, 0.08);
  --color-bg-8: rgba(6, 182, 212, 0.08);

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15), inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    --color-bg-1: rgba(29, 78, 216, 0.15);
    --color-bg-2: rgba(180, 83, 9, 0.15);
    --color-bg-3: rgba(21, 128, 61, 0.15);
    --color-bg-4: rgba(185, 28, 28, 0.15);
    --color-bg-5: rgba(107, 33, 168, 0.15);
    --color-bg-6: rgba(194, 65, 12, 0.15);
    --color-bg-7: rgba(190, 24, 93, 0.15);
    --color-bg-8: rgba(8, 145, 178, 0.15);

    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: var(--color-teal-800);
    --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
    --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
    --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.3);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
    --color-btn-primary-text: var(--color-slate-900);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1), inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
}

:root[data-theme="dark"] {
  --color-gray-400-rgb: 119, 124, 124;
  --color-teal-300-rgb: 50, 184, 198;
  --color-gray-300-rgb: 167, 169, 169;
  --color-gray-200-rgb: 245, 245, 245;

  --color-bg-1: rgba(29, 78, 216, 0.15);
  --color-bg-2: rgba(180, 83, 9, 0.15);
  --color-bg-3: rgba(21, 128, 61, 0.15);
  --color-bg-4: rgba(185, 28, 28, 0.15);
  --color-bg-5: rgba(107, 33, 168, 0.15);
  --color-bg-6: rgba(194, 65, 12, 0.15);
  --color-bg-7: rgba(190, 24, 93, 0.15);
  --color-bg-8: rgba(8, 145, 178, 0.15);

  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-error: var(--color-red-400);
  --color-success: var(--color-teal-300);
  --color-warning: var(--color-orange-400);
  --color-info: var(--color-gray-300);
  --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1), inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
  --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  --color-success-rgb: var(--color-teal-300-rgb);
  --color-error-rgb: var(--color-red-400-rgb);
  --color-warning-rgb: var(--color-orange-400-rgb);
  --color-info-rgb: var(--color-gray-300-rgb);
}

:root[data-theme="light"] {
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;

  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);

  --color-success-rgb: var(--color-teal-500-rgb);
  --color-error-rgb: var(--color-red-500-rgb);
  --color-warning-rgb: var(--color-orange-500-rgb);
  --color-info-rgb: var(--color-slate-500-rgb);
}

html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Chat Styles */
:root {
  --primary-color: var(--color-primary);
  --primary-hover: var(--color-primary-hover);
  --secondary-color: var(--color-secondary);
  --text-primary: var(--color-text);
  --text-secondary: var(--color-text-secondary);
  --border-color: var(--color-border);
  --success-color: var(--color-success);
  --danger-color: var(--color-error);
  --sidebar-bg: var(--color-surface);
  --chat-bg: var(--color-background);
  --message-own-bg: var(--color-primary);
  --message-other-bg: var(--color-secondary);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  font-family: var(--font-family-base);
  background-color: var(--color-background);
  color: var(--color-text);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
}

.chat-container {
  display: flex;
  height: 100vh;
  background-color: var(--color-background);
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: 360px;
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.user-profile {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-btn-primary-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-sm);
}

.user-info {
  flex: 1;
}

.user-info h4 {
  margin: 0;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

.status-badge {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-left: var(--space-8);
  font-weight: var(--font-weight-medium);
}

.status-badge.online {
  color: var(--color-success);
}

.status-badge.offline {
  color: var(--color-text-secondary);
}

/* Search Bar */
.search-container {
  position: relative;
  padding: var(--space-12);
  border-bottom: 1px solid var(--color-border);
}

.search-input {
  width: 100%;
  padding: var(--space-8) var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  font-size: var(--font-size-sm);
  font-family: var(--font-family-base);
  background-color: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
  outline: none;
}

.search-results {
  position: absolute;
  top: 48px;
  left: var(--space-12);
  right: var(--space-12);
  background-color: #f9fafb;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-base);
  max-height: 300px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .search-results {
  background-color: #1e293b;
  border-color: #505459;
}

.search-results.hidden {
  display: none;
}

.search-result-item {
  padding: var(--space-8) var(--space-12);
  display: flex;
  align-items: center;
  gap: var(--space-8);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-standard);
  border-bottom: 1px solid #e2e8f0;
  background-color: #f9fafb;
}

[data-theme="dark"] .search-result-item {
  background-color: #1e293b;
  border-bottom-color: #505459;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background-color: #f1f5f9;
}

[data-theme="dark"] .search-result-item:hover {
  background-color: #2d3a4d;
}

.search-result-item .avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-btn-primary-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  flex-shrink: 0;
}

.search-result-item .user-details {
  flex: 1;
}

.search-result-item .username {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

[data-theme="dark"] .search-result-item .username {
  color: #f1f5f9;
}

.search-result-item .email {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

[data-theme="dark"] .search-result-item .email {
  color: #94a3b8;
}

.search-result-item .status {
  font-size: var(--font-size-md);
}

/* Sidebar Sections */
.sidebar-section {
  flex: 1;
  overflow-y: auto;
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-8) 0;
}

.sidebar-section h5 {
  padding: var(--space-12) var(--space-16) var(--space-8);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin: 0;
  letter-spacing: 0.05em;
}

.chat-list {
  padding: 0 var(--space-8);
}

.chat-item {
  padding: var(--space-8) var(--space-12);
  margin: 0 var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-12);
  cursor: pointer;
  border-radius: var(--radius-base);
  transition: background-color var(--duration-fast) var(--ease-standard);
  position: relative;
}

.chat-item:hover {
  background-color: var(--color-secondary-hover);
}

.chat-item .avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background-color: var(--color-primary);
  color: var(--color-btn-primary-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  flex-shrink: 0;
}

.chat-item .project-avatar {
  font-size: var(--font-size-xl);
}

.chat-info {
  flex: 1;
  min-width: 0;
}

.chat-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-preview {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: var(--line-height-normal);
}

.unread-badge {
  background-color: var(--color-primary);
  color: var(--color-btn-primary-text);
  border-radius: var(--radius-full);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
  box-shadow: var(--shadow-xs);
}

.empty-state {
  padding: var(--space-16);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
}

.sidebar-footer {
  padding: var(--space-16);
  border-top: 1px solid var(--color-border);
}

.logout-btn {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-16);
  background-color: var(--color-error);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-base);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  text-align: center;
  transition: all var(--duration-normal) var(--ease-standard);
  font-family: var(--font-family-base);
}

.logout-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.logout-btn:active {
  transform: translateY(0);
}

.logout-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ===== MAIN CHAT AREA ===== */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--color-background);
}

.chat-window {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--color-text-secondary);
  padding: var(--space-24);
}

.welcome-screen h2 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

.welcome-screen p {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
}

/* Chat Header */
.chat-header {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-xs);
}

.chat-header-title {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.chat-header-title h3 {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

/* Messages Container */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-16);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  align-items: stretch;
}

.message {
  display: flex;
  flex-direction: column;
  max-width: 60%;
  padding: 0;
  border-radius: 0;
  word-wrap: break-word;
  align-self: flex-start;
  box-shadow: none;
  background: transparent !important;
  border: none !important;
  transition: none;
}

.message:hover {
  box-shadow: none;
}

.message.own-message {
  align-self: flex-end;
  background: transparent !important;
  border: none !important;
}

[data-theme="dark"] .message.own-message {
  background: transparent !important;
  border: none !important;
}

.message.other-message {
  align-self: flex-start;
  background: transparent !important;
  border: none !important;
}

[data-theme="dark"] .message.other-message {
  background: transparent !important;
  border: none !important;
}

/* Message sender label */
.message-sender {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-light);
  margin-bottom: 4px;
  padding-left: 4px;
}

.message-sender.own-sender {
  text-align: right;
  padding-right: 4px;
  padding-left: 0;
  color: var(--primary);
}

/* Message body - the actual bubble */
.message-body {
  padding: var(--space-10) var(--space-12);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--duration-fast) var(--ease-standard);
}

.message.own-message .message-body {
  background: var(--msg-own-bg, #e0f2fe);
  color: var(--msg-own-text, #0c4a6e);
  border: 1px solid var(--msg-own-border, #bae6fd);
  border-radius: 16px 16px 4px 16px;
}

[data-theme="dark"] .message.own-message .message-body {
  background: transparent;
  color: var(--msg-own-text, #e2e8f0);
  border: none;
}

.message.other-message .message-body {
  background: var(--msg-other-bg, #f8fafc);
  color: var(--msg-other-text, #1e293b);
  border: 1px solid var(--msg-other-border, #e2e8f0);
  border-radius: 16px 16px 16px 4px;
}

[data-theme="dark"] .message.other-message .message-body {
  /* background: var(--msg-other-bg, #1e293b); */
  color: var(--msg-other-text, #e2e8f0);
  /* border: 1px solid var(--msg-other-border, #505459); */
}

.message-body:hover {
  box-shadow: var(--shadow-sm);
}

.message-content {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  word-break: break-word;
}

.message-time {
  font-size: var(--font-size-xs);
  opacity: 0.7;
  margin-top: var(--space-4);
}

/* Media preview styling */
.file-attachment {
  margin-top: var(--space-8);
  padding: var(--space-8);
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.file-attachment a {
  color: inherit;
  text-decoration: none;
}

.file-attachment img {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-sm);
  display: block;
  margin-bottom: var(--space-8);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-standard);
}

.file-attachment img:hover {
  transform: scale(1.02);
}

.file-attachment video {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-sm);
  display: block;
  margin-bottom: var(--space-8);
}

.file-attachment audio {
  max-width: 100%;
  margin-bottom: var(--space-8);
}

.file-attachment .download-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-10);
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  text-decoration: none;
  color: inherit;
  transition: background-color var(--duration-fast) var(--ease-standard);
  font-weight: var(--font-weight-medium);
}

.file-attachment .download-link:hover {
  background-color: rgba(0, 0, 0, 0.15);
}

.typing-indicator {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-style: italic;
  padding: var(--space-8) var(--space-12);
}

.connection-status {
  font-size: var(--font-size-sm);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-sm);
  display: inline-block;
  font-weight: var(--font-weight-medium);
}

.connection-status.online {
  background-color: rgba(var(--color-success-rgb), 0.15);
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), 0.25);
}

.connection-status.offline {
  background-color: rgba(var(--color-error-rgb), 0.15);
  color: var(--color-error);
  border: 1px solid rgba(var(--color-error-rgb), 0.25);
}

/* Message Input Area */
.message-input-area {
  padding: var(--space-16);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0.05);
}

.input-wrapper {
  display: flex;
  gap: var(--space-8);
  align-items: flex-end;
}

.message-input {
  flex: 1;
  padding: var(--space-8) var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  font-size: var(--font-size-sm);
  font-family: var(--font-family-base);
  background-color: var(--color-surface);
  color: var(--color-text);
  resize: none;
  max-height: 100px;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
  line-height: var(--line-height-normal);
}

.message-input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
  outline: none;
}

.file-upload-btn {
  cursor: pointer;
  font-size: var(--font-size-xl);
  padding: var(--space-8);
  border-radius: var(--radius-base);
  transition: background-color var(--duration-fast) var(--ease-standard);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  border: none;
  background: transparent;
}

.file-upload-btn:hover {
  background-color: var(--color-secondary-hover);
}

.file-upload-btn:active {
  background-color: var(--color-secondary-active);
}

.file-upload-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.send-btn {
  padding: var(--space-8) var(--space-16);
  background-color: var(--color-primary);
  color: var(--color-btn-primary-text);
  border: none;
  border-radius: var(--radius-base);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-normal) var(--ease-standard);
  font-family: var(--font-family-base);
  box-shadow: var(--shadow-xs);
}

.send-btn:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-sm);
}

.send-btn:active {
  background-color: var(--color-primary-active);
  transform: translateY(1px);
}

.send-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.hidden {
  display: none !important;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-standard);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* Responsive - Mobile Portrait (480px) */
@media (max-width: 480px) {
  .chat-container {
    flex-direction: column;
    height: 100vh;
  }

  .sidebar {
    height: 45vh;
    width: 100%;
    min-height: 300px;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .chat-main {
    height: 55vh;
    flex: 1;
  }

  .user-profile {
    padding: var(--space-12);
  }

  .user-avatar {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-md);
  }

  .user-info h4 {
    font-size: var(--font-size-sm);
  }

  .search-container {
    padding: var(--space-8);
  }

  .search-input {
    font-size: var(--font-size-sm);
  }

  .sidebar-section h5 {
    font-size: var(--font-size-xs);
    padding: var(--space-8) var(--space-12) var(--space-6);
  }

  .chat-item {
    padding: var(--space-6) var(--space-8);
    gap: var(--space-8);
    margin: 0 var(--space-2);
  }

  .chat-item .avatar {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
  }

  .chat-name {
    font-size: var(--font-size-xs);
  }

  .chat-preview {
    font-size: var(--font-size-xs);
  }

  .unread-badge {
    width: 20px;
    height: 20px;
    font-size: var(--font-size-xs);
  }

  .sidebar-footer {
    padding: var(--space-12);
  }

  .logout-btn {
    padding: var(--space-8);
    font-size: var(--font-size-xs);
  }

  .message {
    max-width: 85%;
    padding: var(--space-8) var(--space-10);
  }

  .message-content {
    font-size: var(--font-size-sm);
  }

  .message-sender {
    font-size: var(--font-size-xs);
  }

  .message-time {
    font-size: var(--font-size-xs);
  }

  .messages-container {
    padding: var(--space-12);
    gap: var(--space-6);
  }

  .message-input-area {
    padding: var(--space-12);
  }

  .input-wrapper {
    gap: var(--space-6);
  }

  .message-input {
    padding: var(--space-6) var(--space-10);
    font-size: var(--font-size-sm);
  }

  .send-btn {
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-sm);
  }

  .file-upload-btn {
    padding: var(--space-6);
    font-size: var(--font-size-lg);
  }

  .chat-header {
    padding: var(--space-12);
  }

  .chat-header-title {
    gap: var(--space-8);
  }

  .chat-header-title h3 {
    font-size: var(--font-size-md);
  }

  .welcome-screen {
    padding: var(--space-16);
  }

  .welcome-screen h2 {
    font-size: var(--font-size-2xl);
    text-align: center;
    padding: 0 var(--space-16);
  }

  .welcome-screen p {
    font-size: var(--font-size-sm);
    text-align: center;
    padding: 0 var(--space-16);
  }

  .file-attachment img,
  .file-attachment video {
    max-height: 200px;
  }

  .search-results {
    max-height: 200px;
  }

  .search-result-item {
    padding: var(--space-6) var(--space-8);
  }

  .search-result-item .avatar {
    width: 28px;
    height: 28px;
    font-size: var(--font-size-xs);
  }

  .typing-indicator {
    font-size: var(--font-size-xs);
  }

  .connection-status {
    font-size: var(--font-size-xs);
  }

  /* Chat Header Mobile Fixes */
  .chat-header {
    padding: 10px 12px;
    gap: 8px;
    flex-wrap: nowrap;
  }

  .chat-header-title {
    flex: 1;
    min-width: 0;
    max-width: calc(100% - 140px);
    overflow: hidden;
  }

  .chat-header-title h3 {
    font-size: 14px;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .chat-header-actions {
    flex-shrink: 0;
    gap: 4px !important;
  }

  .header-action-btn,
  .mobile-chat-action-btn {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px;
    padding: 0 !important;
  }

  .header-action-btn svg,
  .mobile-chat-action-btn svg {
    width: 16px;
    height: 16px;
  }

  .call-buttons {
    gap: 4px;
  }

  .call-btn {
    width: 32px !important;
    height: 32px !important;
    padding: 0 !important;
  }
}

/* Responsive - Very Small Screens (375px and below) */
@media (max-width: 375px) {
  .chat-header {
    padding: 8px 10px;
    min-height: 56px;
  }

  .chat-header-title {
    max-width: calc(100% - 110px);
    gap: 6px;
  }

  .chat-header-title h3 {
    font-size: 13px;
  }

  /* Hide some header buttons on very small screens */
  #message-search-btn {
    display: none !important;
  }

  /* Mobile search container - full width at top */
  .message-search-container {
    position: fixed !important;
    top: auto !important;
    left: 0 !important;
    right: 0 !important;
    transform: none !important;
    margin: 0 !important;
    border-radius: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    z-index: 1000 !important;
  }

  .message-search-container.active {
    top: 0 !important;
  }

  .chat-header-actions {
    gap: 2px !important;
  }

  .header-action-btn,
  .mobile-chat-action-btn {
    width: 28px !important;
    height: 28px !important;
    min-width: 28px;
  }

  .header-action-btn svg,
  .mobile-chat-action-btn svg {
    width: 14px;
    height: 14px;
  }

  .call-btn {
    width: 28px !important;
    height: 28px !important;
  }

  .call-btn svg {
    width: 14px;
    height: 14px;
  }

  /* Smaller avatar in header */
  .chat-header-title img,
  .chat-header-title>div:first-of-type {
    width: 28px !important;
    height: 28px !important;
    font-size: 10px !important;
  }

  /* Mobile back button */
  .mobile-back-btn {
    width: 28px;
    height: 28px;
    padding: 0;
    margin-right: 4px;
  }

  .mobile-back-btn svg {
    width: 18px;
    height: 18px;
  }

  /* Connection status text smaller */
  .connection-status {
    font-size: 10px;
  }

  /* Message input area */
  .message-input-area {
    padding: 8px 10px;
  }

  .input-wrapper {
    gap: 4px;
  }

  .message-input {
    padding: 8px 10px;
    font-size: 14px;
  }

  .send-btn {
    width: 36px;
    height: 36px;
    padding: 0;
  }

  .input-action-btn {
    width: 32px;
    height: 32px;
    padding: 0;
  }

  /* Welcome screen */
  .welcome-screen h2 {
    font-size: var(--font-size-xl);
  }

  .welcome-screen p {
    font-size: var(--font-size-xs);
  }

  .welcome-actions {
    flex-direction: column;
    gap: 8px;
  }

  .welcome-action-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Responsive - Tablet (768px) */
@media (max-width: 768px) and (min-width: 481px) {
  .sidebar {
    width: 280px;
  }

  .message {
    max-width: 75%;
  }

  .user-profile {
    padding: var(--space-12) var(--space-16);
  }

  .search-container {
    padding: var(--space-10);
  }

  .chat-item {
    padding: var(--space-8) var(--space-10);
  }

  .messages-container {
    padding: var(--space-16);
  }

  .message-input-area {
    padding: var(--space-16);
  }
}

/* ============================================================
   AUTHENTICATION PAGES - Login & Signup
   Professional modern design with glassmorphism
   ============================================================ */

/* Auth Page Background */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-20);
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  position: relative;
  overflow: hidden;
}

/* Animated Background Gradient Orbs */
.auth-page::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 20% 80%, rgba(8, 145, 178, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
  animation: authBgPulse 20s ease-in-out infinite;
  pointer-events: none;
}

@keyframes authBgPulse {

  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }

  25% {
    transform: translate(2%, 2%) rotate(1deg);
  }

  50% {
    transform: translate(0, 4%) rotate(0deg);
  }

  75% {
    transform: translate(-2%, 2%) rotate(-1deg);
  }
}

/* Grid Pattern Overlay */
.auth-page::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

/* Auth Card - Glassmorphism */
.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: 40px;
  box-shadow:
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
  animation: authCardSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.auth-card.signup-card {
  max-width: 480px;
}

@keyframes authCardSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Auth Header */
.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
  border-radius: 16px;
  margin-bottom: 20px;
  box-shadow: 0 8px 24px rgba(8, 145, 178, 0.4);
  animation: authLogoFloat 3s ease-in-out infinite;
}

@keyframes authLogoFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-4px);
  }
}

.auth-logo svg {
  width: 28px;
  height: 28px;
  color: white;
}

/* Auth Brand Container */
.auth-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.auth-brand .auth-logo {
  margin-bottom: 0;
}

.auth-brand-name {
  font-size: 32px;
  font-weight: 700;
  color: #f8fafc;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #0891b2 0%, #22d3ee 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-title {
  font-size: 28px;
  font-weight: 700;
  color: #f8fafc;
  margin: 0 0 8px 0;
  letter-spacing: -0.5px;
}

.auth-subtitle {
  font-size: 14px;
  color: #94a3b8;
  margin: 0;
  font-weight: 500;
}

/* Auth Form */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Form Row for Side-by-Side Fields */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Input Group with Floating Label Effect */
.input-group {
  position: relative;
}

.input-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 8px;
  transition: color 0.2s ease;
}

.input-group:focus-within label {
  color: #22d3ee;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 14px;
  color: #64748b;
  pointer-events: none;
  transition: color 0.2s ease;
  z-index: 1;
}

.input-icon svg {
  width: 18px;
  height: 18px;
}

.input-group:focus-within .input-icon {
  color: #22d3ee;
}

.auth-input {
  width: 100%;
  padding: 14px 14px 14px 44px;
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  color: #f1f5f9;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  outline: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-input::placeholder {
  color: #64748b;
}

.auth-input:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: transparent;
}

.auth-input:focus {
  border-color: #22d3ee;
  background: transparent;
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

/* Password Toggle Button */
.password-toggle {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: #64748b;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}

.password-toggle:hover {
  color: #94a3b8;
}

.password-toggle svg {
  width: 18px;
  height: 18px;
}

/* Auth Button */
.auth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 24px;
  font-size: 15px;
  font-family: inherit;
  font-weight: 600;
  color: #0f172a;
  background: linear-gradient(135deg, #22d3ee 0%, #06b6d4 100%);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.4);
  margin-top: 8px;
  position: relative;
  overflow: hidden;
}

.auth-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.2) 100%);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(34, 211, 238, 0.5);
}

.auth-btn:hover::before {
  opacity: 1;
}

.auth-btn:active {
  transform: translateY(0);
}

.auth-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.2s ease;
}

.auth-btn:hover svg {
  transform: translateX(2px);
}

/* Auth Footer */
.auth-footer {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.auth-footer p {
  font-size: 13px;
  color: #64748b;
  margin: 0 0 8px 0;
}

.auth-footer a {
  color: #22d3ee;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
}

.auth-footer a:hover {
  color: #67e8f9;
  text-decoration: underline;
}

.auth-footer .admin-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
  font-size: 12px;
  color: #475569;
}

.auth-footer .admin-link a {
  color: #64748b;
}

.auth-footer .admin-link a:hover {
  color: #94a3b8;
}

/* Alert Messages */
.auth-alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
  animation: authAlertSlide 0.3s ease;
}

@keyframes authAlertSlide {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.auth-alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.auth-alert-success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #86efac;
}

.auth-alert-info {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
}

/* Field Error */
.field-error {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #f87171;
  margin-top: 6px;
}

.field-error svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* Auth Responsive */
@media (max-width: 480px) {
  .auth-page {
    padding: 16px;
    align-items: flex-start;
    padding-top: 60px;
  }

  .auth-card {
    padding: 28px 24px;
    border-radius: 20px;
  }

  .auth-card.signup-card {
    max-width: 100%;
  }

  .auth-logo {
    width: 48px;
    height: 48px;
    border-radius: 14px;
  }

  .auth-logo svg {
    width: 24px;
    height: 24px;
  }

  .auth-title {
    font-size: 24px;
  }

  .auth-subtitle {
    font-size: 13px;
  }

  .auth-brand {
    gap: 10px;
    margin-bottom: 20px;
  }

  .auth-brand-name {
    font-size: 26px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .auth-input {
    padding: 12px 12px 12px 40px;
    font-size: 16px;
    /* Prevents iOS zoom */
  }

  .auth-btn {
    padding: 12px 20px;
    font-size: 14px;
  }

  .auth-footer {
    margin-top: 24px;
    padding-top: 20px;
  }
}

/* Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 4px 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
}

.auth-divider span {
  font-size: 12px;
  color: #475569;
  font-weight: 500;
}

/* ============================================================
   CHAT INTERFACE - Professional Modern Design
   ============================================================ */

/* Chat Page Variables - Unified with Auth */
.chat-page {
  --chat-bg: #f8fafc;
  --chat-surface: #f9fafb;
  --chat-surface-hover: #f1f5f9;
  --chat-border: #e2e8f0;
  --chat-border-light: #f1f5f9;
  --chat-text: #0f172a;
  --chat-text-secondary: #64748b;
  --chat-text-muted: #94a3b8;
  --chat-primary: #0891b2;
  --chat-primary-light: #06b6d4;
  --chat-primary-dark: #0e7490;
  --chat-accent: #8b5cf6;
  --chat-success: #10b981;
  --chat-error: #ef4444;
  --chat-warning: #f59e0b;
  --chat-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --chat-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07);
  --chat-shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  --chat-radius-sm: 8px;
  --chat-radius: 12px;
  --chat-radius-lg: 16px;
  --chat-radius-xl: 20px;
}

/* Dark Mode Chat Variables */
@media (prefers-color-scheme: dark) {
  .chat-page {
    --chat-bg: #0f172a;
    --chat-surface: #1e293b;
    --chat-surface-hover: #334155;
    --chat-border: #334155;
    --chat-border-light: #1e293b;
    --chat-text: #f1f5f9;
    --chat-text-secondary: #94a3b8;
    --chat-text-muted: #64748b;
    --chat-primary: #22d3ee;
    --chat-primary-light: #67e8f9;
    --chat-primary-dark: #06b6d4;
    --chat-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --chat-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --chat-shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
  }
}

/* Main Chat Container */
.chat-main-container {
  display: grid;
  grid-template-columns: 320px 1fr 300px;
  height: 100vh;
  background: var(--chat-bg);
  overflow: hidden;
}

.chat-main-container.sidebar-collapsed {
  grid-template-columns: 320px 1fr;
}

/* Chat Sidebar */
.chat-sidebar {
  background: var(--chat-surface);
  border-right: 1px solid var(--chat-border);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

/* Sidebar Header */
.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--chat-primary) 0%, var(--chat-primary-light) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.sidebar-logo svg {
  width: 20px;
  height: 20px;
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--chat-text);
  letter-spacing: -0.3px;
}

.sidebar-actions {
  display: flex;
  gap: 8px;
}

.sidebar-action-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--chat-border);
  background: var(--chat-surface);
  border-radius: var(--chat-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.sidebar-action-btn:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-text);
  border-color: var(--chat-primary);
}

.sidebar-action-btn svg {
  width: 18px;
  height: 18px;
}

/* Search Box */
.chat-search-box {
  padding: 12px 16px;
  border-bottom: 1px solid var(--chat-border);
}

.chat-search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.chat-search-icon {
  position: absolute;
  left: 12px;
  color: var(--chat-text-muted);
  pointer-events: none;
}

.chat-search-icon svg {
  width: 16px;
  height: 16px;
}

.chat-search-input {
  width: 100%;
  padding: 10px 12px 10px 40px;
  font-size: 14px;
  font-family: inherit;
  color: var(--chat-text);
  background: var(--chat-bg);
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius);
  outline: none;
  transition: all 0.2s ease;
}

.chat-search-input::placeholder {
  color: var(--chat-text-muted);
}

.chat-search-input:focus {
  border-color: var(--chat-primary);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

/* Chat List Section */
.chat-list-section {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.chat-list-header {
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--chat-text-muted);
  background: var(--chat-bg);
  border-bottom: 1px solid var(--chat-border-light);
}

.chat-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.chat-list::-webkit-scrollbar {
  width: 6px;
}

.chat-list::-webkit-scrollbar-track {
  background: transparent;
}

.chat-list::-webkit-scrollbar-thumb {
  background: var(--chat-border);
  border-radius: 3px;
}

.chat-list::-webkit-scrollbar-thumb:hover {
  background: var(--chat-text-muted);
}

/* Chat Item */
.chat-item {
  display: flex;
  align-items: center;
  padding: 12px;
  margin-bottom: 4px;
  border-radius: var(--chat-radius);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  border: 1px solid transparent;
}

.chat-item:hover {
  background: var(--chat-surface-hover);
}

.chat-item.active {
  background: linear-gradient(135deg, var(--chat-primary) 0%, var(--chat-primary-light) 100%);
  border-color: var(--chat-primary-dark);
  box-shadow: var(--chat-shadow);
}

.chat-item.active .chat-item-name,
.chat-item.active .chat-item-preview,
.chat-item.active .chat-item-time {
  color: white;
}

.chat-item.active .chat-item-preview {
  opacity: 0.9;
}

/* Chat Avatar */
.chat-avatar {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--chat-primary) 0%, var(--chat-primary-light) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 15px;
  margin-right: 12px;
  flex-shrink: 0;
  position: relative;
  box-shadow: var(--chat-shadow-sm);
  overflow: hidden;
}

.chat-avatar.project {
  background: linear-gradient(135deg, var(--chat-accent) 0%, #a78bfa 100%);
}

.chat-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 10px;
}

/* Online Status Indicator */
.status-indicator {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--chat-surface);
  background: var(--chat-text-muted);
}

.status-indicator.online {
  background: var(--chat-success);
}

/* Chat Item Info */
.chat-item-info {
  flex: 1;
  min-width: 0;
}

.chat-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.chat-item-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--chat-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-item-time {
  font-size: 11px;
  color: var(--chat-text-muted);
  flex-shrink: 0;
  margin-left: 8px;
}

.chat-item-preview {
  font-size: 13px;
  color: var(--chat-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Unread Badge */
.unread-badge {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background: var(--chat-error);
  color: white;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-item.active .unread-badge {
  background: white;
  color: var(--chat-primary);
}

/* Empty State */
.chat-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
  color: var(--chat-text-muted);
}

.chat-empty-icon {
  width: 64px;
  height: 64px;
  background: var(--chat-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--chat-text-muted);
}

.chat-empty-icon svg {
  width: 28px;
  height: 28px;
}

.chat-empty-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--chat-text);
  margin: 0 0 8px 0;
}

.chat-empty-text {
  font-size: 13px;
  margin: 0;
  line-height: 1.5;
}

/* Chat Main Area */
.chat-main {
  display: flex;
  flex-direction: column;
  background: var(--chat-bg);
  overflow: hidden;
}

/* Chat Header */
.chat-header {
  padding: 12px 20px;
  background: var(--chat-surface);
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.chat-header-avatar {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--chat-primary) 0%, var(--chat-primary-light) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
  overflow: hidden;
}

.chat-header-details {
  min-width: 0;
}

.chat-header-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--chat-text);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-header-status {
  font-size: 12px;
  color: var(--chat-text-muted);
  margin: 2px 0 0 0;
}

.chat-header-status.online {
  color: var(--chat-success);
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-header-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--chat-border);
  background: var(--chat-surface);
  border-radius: var(--chat-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.chat-header-btn:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-text);
  border-color: var(--chat-primary);
}

.chat-header-btn svg {
  width: 18px;
  height: 18px;
}

.chat-header-btn.primary {
  background: var(--chat-primary);
  border-color: var(--chat-primary);
  color: white;
}

.chat-header-btn.primary:hover {
  background: var(--chat-primary-dark);
}

/* Messages Container */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--chat-border);
  border-radius: 3px;
}

/* Message Bubble */
.message {
  display: flex;
  flex-direction: column;
  max-width: 65%;
  animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Toast Notification Animations */
@keyframes toastFadeIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes toastFadeOut {
  from {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }

  to {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
}

.message.sent {
  align-self: flex-end;
  align-items: flex-end;
}

.message.received {
  align-self: flex-start;
  align-items: flex-start;
}

.message-sender {
  font-size: 12px;
  font-weight: 600;
  color: var(--chat-primary);
  margin-bottom: 4px;
  padding: 0 4px;
}

.message-bubble {
  padding: 12px 16px;
  border-radius: var(--chat-radius-lg);
  position: relative;
  word-wrap: break-word;
}

.message.sent .message-bubble {
  background: #f9fafb;
  color: #1e293b;
  border: 1px solid #e2e8f0;
  border-bottom-right-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.message.received .message-bubble {
  background: #f9fafb;
  color: #1e293b;
  border: 1px solid #e2e8f0;
  border-bottom-left-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.message-text {
  font-size: 14px;
  line-height: 1.5;
}

.message-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  padding: 0 4px;
}

.message-time {
  font-size: 11px;
  color: var(--chat-text-muted);
}

.message-edited-label {
  font-size: 10px;
  color: var(--chat-text-muted);
  font-style: italic;
  opacity: 0.8;
}

.message.sent .message-edited-label {
  color: rgba(255, 255, 255, 0.6);
}

.message.sent .message-time {
  color: rgba(255, 255, 255, 0.7);
}

.message-status {
  display: flex;
  align-items: center;
  color: rgba(255, 255, 255, 0.7);
}

.message-status svg {
  width: 14px;
  height: 14px;
}

.message-status.read {
  color: #34d399;
}

/* File Attachment */
.message-attachment {
  margin-top: 8px;
  border-radius: var(--chat-radius);
  overflow: hidden;
}

.message-attachment img,
.message-attachment video {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--chat-radius);
  display: block;
}

.message-file {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: var(--chat-radius-sm);
}

.message.received .message-file {
  background: var(--chat-bg);
}

.message-file-icon {
  width: 36px;
  height: 36px;
  background: var(--chat-primary);
  border-radius: var(--chat-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.message-file-info {
  flex: 1;
  min-width: 0;
}

.message-file-name {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message-file-size {
  font-size: 11px;
  opacity: 0.7;
}

/* Chat Input Area */
.chat-input-container {
  padding: 16px 20px;
  background: var(--chat-surface);
  border-top: 1px solid var(--chat-border);
}

.chat-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 12px;
}

.chat-input-box {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--chat-bg);
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius-lg);
  padding: 8px 12px;
  transition: all 0.2s ease;
}

.chat-input-box:focus-within {
  border-color: var(--chat-primary);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

.chat-input-actions {
  display: flex;
  gap: 4px;
}

.chat-input-action {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  border-radius: var(--chat-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.chat-input-action:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-text);
}

.chat-input-action svg {
  width: 18px;
  height: 18px;
}

.chat-input-field {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  font-family: inherit;
  color: var(--chat-text);
  resize: none;
  max-height: 120px;
  min-height: 24px;
  line-height: 1.5;
  outline: none;
}

.chat-input-field::placeholder {
  color: var(--chat-text-muted);
}

.chat-send-btn {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--chat-primary) 0%, var(--chat-primary-light) 100%);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--chat-shadow);
  flex-shrink: 0;
}

.chat-send-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--chat-shadow-lg);
}

.chat-send-btn:active {
  transform: scale(0.98);
}

.chat-send-btn svg {
  width: 20px;
  height: 20px;
}

/* Welcome Screen */
.chat-welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
}

.chat-welcome-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--chat-primary) 0%, var(--chat-primary-light) 100%);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: var(--chat-shadow-lg);
}

.chat-welcome-icon svg {
  width: 40px;
  height: 40px;
  color: white;
}

.chat-welcome-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--chat-text);
  margin: 0 0 8px 0;
}

.chat-welcome-text {
  font-size: 14px;
  color: var(--chat-text-secondary);
  margin: 0;
}

/* Right Sidebar */
.chat-info-sidebar {
  background: var(--chat-surface);
  border-left: 1px solid var(--chat-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-info-header {
  padding: 16px;
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-info-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--chat-text);
}

.chat-info-close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  border-radius: var(--chat-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.chat-info-close:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-text);
}

.chat-info-profile {
  padding: 24px;
  text-align: center;
  border-bottom: 1px solid var(--chat-border);
}

.chat-info-avatar {
  width: 72px;
  height: 72px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--chat-primary) 0%, var(--chat-primary-light) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 24px;
  margin: 0 auto 12px;
  box-shadow: var(--chat-shadow);
  overflow: hidden;
}

.chat-info-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--chat-text);
  margin: 0 0 4px 0;
}

.chat-info-status {
  font-size: 13px;
  color: var(--chat-text-muted);
  margin: 0;
}

/* Chat Responsive */
@media (max-width: 1024px) {
  .chat-main-container {
    grid-template-columns: 300px 1fr;
  }

  .chat-info-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .chat-main-container {
    grid-template-columns: 1fr;
  }

  .chat-sidebar {
    display: none;
  }

  .chat-main-container.show-sidebar .chat-sidebar {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 100;
    width: 100%;
  }

  .chat-header {
    padding: 12px 16px;
  }

  .message {
    max-width: 85%;
  }

  .chat-messages {
    padding: 16px;
  }

  .chat-input-container {
    padding: 12px 16px;
  }
}

/* ============================================================
   THEME CONFIGURATION
   ============================================================ */

:root {
  /* Unified App Colors (Light Mode Default) */
  --primary: #0891b2;
  --primary-light: #06b6d4;
  --primary-dark: #0e7490;
  --accent: #8b5cf6;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --text: #0f172a;
  --text-light: #64748b;
  --text-lighter: #94a3b8;
  --bg: #f8fafc;
  --surface: #f9fafb;
  --border: #e2e8f0;
  --border-dark: #cbd5e1;
  --hover: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
}

:root[data-theme='dark'] {
  /* Dark Mode Overrides */
  --color-background: #0f172a;
  --color-surface: #1e293b;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-border: #334155;

  /* App Specific Dark Mode */
  --bg: #0f172a;
  --surface: #1e293b;
  --text: #f1f5f9;
  --text-light: #cbd5e1;
  --text-lighter: #94a3b8;
  --border: #334155;
  --border-dark: #475569;
  --hover: #334155;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

/* ============================================
   DISCORD-LIKE CHANNEL CHAT HEADER
   ============================================ */

.channel-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  min-height: 52px;
  gap: 12px;
}

.channel-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.channel-header-avatar {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.channel-header-avatar svg {
  width: 20px;
  height: 20px;
  stroke: white;
}

.channel-header-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  min-width: 0;
  overflow: hidden;
}

.channel-header-name {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
}

.channel-hash {
  color: var(--text-lighter);
  font-weight: 700;
  font-size: 18px;
  opacity: 0.7;
}

.channel-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.channel-header-name svg {
  width: 14px;
  height: 14px;
  color: var(--text-lighter);
  flex-shrink: 0;
  margin-left: 4px;
}

.channel-header-topic {
  font-size: 12px;
  color: var(--text-lighter);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.channel-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.channel-action-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: all 0.2s ease;
}

.channel-action-btn:hover {
  background: var(--hover);
  color: var(--text);
  border-color: var(--primary);
}

.channel-action-btn:active {
  transform: scale(0.95);
}

.channel-action-btn svg {
  width: 18px;
  height: 18px;
}

/* Divider between channel name and topic on larger screens */
@media (min-width: 768px) {
  .channel-header-info {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .channel-header-name {
    position: relative;
    padding-right: 12px;
  }

  .channel-header-name::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 16px;
    background: var(--border);
  }

  /* Hide divider if there's no topic */
  .channel-header-info:only-child .channel-header-name::after,
  .channel-header-name:last-child::after {
    display: none;
  }

  .channel-header-topic {
    flex: 1;
    min-width: 0;
  }
}

/* Mobile responsive */
@media (max-width: 767px) {
  .channel-chat-header {
    padding: 10px 12px;
    gap: 10px;
  }

  .channel-header-avatar {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 8px;
  }

  .channel-header-avatar svg {
    width: 18px;
    height: 18px;
  }

  .channel-header-name {
    font-size: 14px;
  }

  .channel-hash {
    font-size: 16px;
  }

  .channel-header-topic {
    font-size: 11px;
  }

  .channel-action-btn {
    width: 32px;
    height: 32px;
  }

  .channel-action-btn svg {
    width: 16px;
    height: 16px;
  }
}


/* ============================================================
   AUDIO RECORDING UI STYLES
   ============================================================ */

/* Audio recording button */
.input-action-btn#audio-record-btn,
.input-action-btn#channel-audio-record-btn {
  position: relative;
  transition: all 0.3s ease;
}

.input-action-btn#audio-record-btn:hover,
.input-action-btn#channel-audio-record-btn:hover {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
  transform: scale(1.05);
}

.input-action-btn#audio-record-btn:active,
.input-action-btn#channel-audio-record-btn:active {
  transform: scale(0.95);
}

/* Audio recording UI container */
.audio-recording-ui {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--bg-secondary, #f1f5f9);
  border-radius: 12px;
  animation: slideIn 0.3s ease;
}

[data-theme="dark"] .audio-recording-ui {
  background: rgba(255, 255, 255, 0.05);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Recording indicator */
.recording-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #ef4444;
  position: relative;
}

.recording-pulse {
  width: 12px;
  height: 12px;
  background: #ef4444;
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

/* Recording time */
.recording-time {
  font-size: 16px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text, #1e293b);
  min-width: 50px;
}

[data-theme="dark"] .recording-time {
  color: var(--text, #f1f5f9);
}

/* Recording actions */
.recording-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.recording-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.recording-btn:hover {
  transform: scale(1.1);
}

.recording-btn:active {
  transform: scale(0.95);
}

.recording-btn.cancel-btn {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.recording-btn.cancel-btn:hover {
  background: #ef4444;
  color: white;
}

.recording-btn.stop-btn {
  background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(8, 145, 178, 0.3);
}

.recording-btn.stop-btn:hover {
  box-shadow: 0 6px 16px rgba(8, 145, 178, 0.4);
}

/* Preview UI */
.recording-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.preview-audio-container {
  flex: 1;
  min-width: 0;
}

.preview-audio-container audio {
  width: 100%;
  height: 36px;
  border-radius: 18px;
  outline: none;
}

.preview-duration {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light, #64748b);
  white-space: nowrap;
}

.preview-actions {
  display: flex;
  gap: 8px;
}

.recording-btn.discard-btn {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.recording-btn.discard-btn:hover {
  background: #ef4444;
  color: white;
}

.recording-btn.send-btn {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.recording-btn.send-btn:hover {
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .audio-recording-ui {
    gap: 12px;
    padding: 10px 12px;
  }

  .recording-time {
    font-size: 14px;
    min-width: 45px;
  }

  .recording-btn {
    width: 36px;
    height: 36px;
  }

  .recording-btn svg {
    width: 18px;
    height: 18px;
  }

  .preview-audio-container audio {
    height: 32px;
  }
}