: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;

  /* ADDED: Header height variable */
  --header-height: 65px;
}

/* 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 */
[data-color-scheme="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);
}

[data-color-scheme="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;
  height: 100vh;
  overflow: hidden;
}

*,
*::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-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="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-color-scheme="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 */
/* Custom styles for the enhanced chat application with friend system */

body {
  margin: 0;
  padding: 0;
  height: 100vh;
  overflow: hidden;
}

/* Network Status Indicator */
.network-status {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-error);
  color: white;
  padding: var(--space-8) var(--space-16);
  text-align: center;
  z-index: 1001;
  font-size: var(--font-size-sm);
  transition: transform var(--duration-normal) var(--ease-standard);
}

.network-status.hidden {
  transform: translateY(-100%);
}

.network-message {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
}

.network-icon {
  animation: pulse 2s infinite;
}

/* Authentication Styles */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-1);
  padding: var(--space-16);
}

.auth-page {
  width: 100%;
  max-width: 400px;
}

.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-card-border);
  position: relative;
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-32);
}

.auth-header h1 {
  color: var(--color-primary);
  margin-bottom: var(--space-8);
}

.auth-header h2 {
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.auth-header p {
  color: var(--color-text-secondary);
  margin: 0;
}

.auth-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.auth-form {
  margin-bottom: var(--space-24);
}

.auth-footer {
  text-align: center;
  margin-top: var(--space-16);
}

.auth-footer p {
  color: var(--color-text-secondary);
  margin: 0;
  font-size: var(--font-size-sm);
}

/* Enhanced Form Styles */
.form-group {
  position: relative;
  margin-bottom: var(--space-16);
}

.form-control {
  padding-right: var(--space-32);
}

.form-control.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(var(--color-error-rgb), 0.1);
}

.input-icon {
  position: absolute;
  right: var(--space-12);
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--font-size-sm);
  opacity: 0.6;
  pointer-events: none;
}

.field-error {
  color: var(--color-error);
  font-size: var(--font-size-xs);
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.field-error::before {
  content: "⚠️";
  font-size: var(--font-size-xs);
}

.form-hint {
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  margin-top: var(--space-4);
}

/* Nickname Availability Status */
.nickname-status {
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nickname-status.available {
  background: rgba(var(--color-success-rgb), 0.1);
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), 0.2);
}

.nickname-status.unavailable {
  background: rgba(var(--color-error-rgb), 0.1);
  color: var(--color-error);
  border: 1px solid rgba(var(--color-error-rgb), 0.2);
}

.nickname-status.checking {
  background: rgba(var(--color-info-rgb), 0.1);
  color: var(--color-info);
  border: 1px solid rgba(var(--color-info-rgb), 0.2);
}

/* Password Strength Indicator */
.password-strength {
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-8);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-standard);
}

.password-strength.weak {
  background: rgba(var(--color-error-rgb), 0.1);
  color: var(--color-error);
  border: 1px solid rgba(var(--color-error-rgb), 0.2);
}

.password-strength.medium {
  background: rgba(var(--color-warning-rgb), 0.1);
  color: var(--color-warning);
  border: 1px solid rgba(var(--color-warning-rgb), 0.2);
}

.password-strength.strong {
  background: rgba(var(--color-success-rgb), 0.1);
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), 0.2);
}

/* Enhanced Button Styles */
.btn {
  position: relative;
  overflow: hidden;
}

.btn-text {
  transition: opacity var(--duration-fast) var(--ease-standard);
}

.btn-spinner {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  animation: spin 1s linear infinite;
  font-size: var(--font-size-lg);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn--ghost {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  padding: var(--space-4);
}

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

/* Chat Container */
.chat-container {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-background);
}

/* Enhanced Header */
.chat-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-24);
  height: var(--header-height);
  box-shadow: var(--shadow-sm);
  z-index: 10;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
}

.header-content h1 {
  color: var(--color-primary);
  margin: 0;
  font-size: var(--font-size-2xl);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-error);
  transition: background-color var(--duration-fast) var(--ease-standard);
}

.status-indicator.online {
  background: var(--color-success);
  animation: pulse 2s infinite;
}

.current-user {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

/* Main Chat Layout */
.chat-main {
  flex: 1;
  display: flex;
  height: calc(100vh - var(--header-height));
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  overflow: hidden;
}

/* Enhanced Friends Panel */
.friends-panel {
  width: 320px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

/* Friend Search Section */
.friend-search-section {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.search-header h3 {
  margin: 0 0 var(--space-12) 0;
  color: var(--color-text);
  font-size: var(--font-size-lg);
}

.search-input-wrapper {
  position: relative;
}

.search-input {
  padding-right: var(--space-32);
  background: var(--color-background);
  border-radius: var(--radius-full);
}

.search-icon {
  position: absolute;
  right: var(--space-12);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  pointer-events: none;
}

/* Search Results */
.search-results {
  position: absolute;
  top: 100%;
  left: var(--space-16);
  right: var(--space-16);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg);
  max-height: 200px;
  overflow-y: auto;
  z-index: 100;
  margin-top: var(--space-4);
}

.search-result-item {
  padding: var(--space-12);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-standard);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.search-result-user {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.search-result-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.search-result-info h5 {
  margin: 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.search-result-info .nickname {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin: 0;
}

.add-friend-btn {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

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

/* Section Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-16) var(--space-16) var(--space-8) var(--space-16);
}

.section-header h4 {
  margin: 0;
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
}

.count-badge {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-full);
  min-width: 16px;
  text-align: center;
}

.refresh-friends {
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-4);
}

.refresh-icon {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-standard);
}

.refresh-friends:hover .refresh-icon {
  transform: rotate(180deg);
}

/* Friend Requests Section */
.friend-requests-section {
  border-bottom: 1px solid var(--color-border);
  max-height: 200px;
  overflow-y: auto;
}

.friend-requests-list {
  max-height: 150px;
  overflow-y: auto;
}

.friend-request-item {
  padding: var(--space-12) var(--space-16);
  display: flex;
  align-items: center;
  gap: var(--space-12);
  transition: background-color var(--duration-fast) var(--ease-standard);
}

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

.request-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-bg-4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

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

.request-info h5 {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.request-info .nickname {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.request-actions {
  display: flex;
  gap: var(--space-4);
}

.accept-btn,
.decline-btn {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  border: none;
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.accept-btn {
  background: var(--color-success);
  color: white;
}

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

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

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

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

.friends-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-8) var(--space-16);
}

.friend-item {
  display: flex;
  align-items: center;
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  margin-bottom: var(--space-4);
  position: relative;
}

.friend-item:hover {
  background: var(--color-secondary);
  transform: translateX(2px);
}

.friend-item.active {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  box-shadow: var(--shadow-sm);
}

.friend-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-right: var(--space-12);
  font-size: var(--font-size-sm);
  position: relative;
}

.friend-item.active .friend-avatar {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-btn-primary-text);
}

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

.friend-info h4 {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.friend-info .friend-nickname {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin: 0;
}

.friend-item.active .friend-info .friend-nickname {
  color: rgba(255, 255, 255, 0.8);
}

.friend-status {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-success);
}

.friend-item.active .friend-status {
  color: rgba(255, 255, 255, 0.9);
}

.online-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  position: absolute;
  bottom: 2px;
  right: 2px;
  border: 2px solid var(--color-surface);
}

/* Loading and Error States */
.loading-state,
.error-state,
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-24);
  text-align: center;
  color: var(--color-text-secondary);
  gap: var(--space-12);
}

.error-state {
  color: var(--color-error);
}

.loading-spinner-sm {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(var(--color-primary-rgb, 33, 128, 141), 0.3);
  border-top: 2px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Chat Panel */
.chat-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-background);
}

/* Enhanced Welcome State */
.welcome-state {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.welcome-content {
  max-width: 400px;
  padding: var(--space-32);
}

.welcome-icon {
  font-size: 4rem;
  margin-bottom: var(--space-16);
}

.welcome-content h3 {
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.welcome-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-24);
}

.welcome-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-32);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.stat-number {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Enhanced Chat Window */
.chat-window {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-window-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-12) var(--space-24);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  flex-shrink: 0;
}

.chat-recipient {
  display: flex;
  align-items: center;
}

.mobile-back {
  display: none;
  margin-right: var(--space-8);
  font-size: var(--font-size-lg);
}

.recipient-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-bg-5);
  margin-right: var(--space-16);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.recipient-info h4 {
  margin: 0;
  color: var(--color-text);
  font-size: var(--font-size-lg);
}

.recipient-nickname {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: var(--space-2) 0;
  display: block;
}

.recipient-status {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-success);
  font-size: var(--font-size-sm);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}

.chat-actions {
  display: flex;
  gap: var(--space-8);
  position: relative;
}

/* Friend Options Menu */
.friend-options-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg);
  min-width: 160px;
  z-index: 100;
  overflow: hidden;
}

.option-item {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-12) var(--space-16);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: background-color var(--duration-fast) var(--ease-standard);
}

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

.option-item.danger:hover {
  background: rgba(var(--color-error-rgb), 0.1);
  color: var(--color-error);
}

.option-icon {
  font-size: var(--font-size-base);
}

/* Connection Status Bar */
.chat-connection-status {
  background: var(--color-warning);
  color: white;
  padding: var(--space-8) var(--space-24);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  animation: slideDown 0.3s ease-out;
}

.chat-connection-status.hidden {
  display: none;
}

.connection-message {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.connection-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Messages Area */
.messages-area {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-16) var(--space-24);
  background: var(--color-background);
  /* Optional: Add smooth scrolling */
  scroll-behavior: smooth;
}


.message {
  display: flex;
  margin-bottom: var(--space-16);
  animation: fadeInUp 0.3s ease-out;
}

.message.sent {
  justify-content: flex-end;
}

.message-bubble {
  max-width: 70%;
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-lg);
  position: relative;
  word-wrap: break-word;
}

.message.received .message-bubble {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

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

.message-content {
  margin-bottom: var(--space-4);
  line-height: 1.4;
}

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

.message-sender {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-4);
  opacity: 0.8;
}

.messages-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-24);
  color: var(--color-text-secondary);
  gap: var(--space-8);
}

/* Enhanced Message Input */
.message-input-area {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-16) var(--space-24);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  flex-shrink: 0;
}

.message-form {
  display: flex;
  gap: var(--space-12);
  align-items: flex-end;
}

.message-input {
  flex: 1;
  padding: var(--space-12) var(--space-16);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-background);
  color: var(--color-text);
  font-size: var(--font-size-base);
  resize: none;
  max-height: 120px;
  transition: all var(--duration-fast) var(--ease-standard);
}

.message-input:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--color-teal-500-rgb), 0.1);
}

.message-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.message-send-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: all var(--duration-fast) var(--ease-standard);
  flex-shrink: 0;
}

.message-send-btn:disabled {
  opacity: 0.6;
}

.character-count {
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-24);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.character-count.warning {
  color: var(--color-warning);
  font-weight: var(--font-weight-medium);
}

/* Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  max-width: 400px;
  width: 90%;
  position: relative;
  z-index: 1001;
}

.modal-header {
  padding: var(--space-20) var(--space-24) var(--space-16) var(--space-24);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  margin: 0;
  color: var(--color-text);
}

.modal-body {
  padding: var(--space-16) var(--space-24);
}

.modal-body p {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.modal-footer {
  padding: var(--space-16) var(--space-24) var(--space-20) var(--space-24);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-12);
}

/* Enhanced Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-16);
  color: white;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(var(--color-primary-rgb, 33, 128, 141), 0.3);
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: var(--space-20);
  right: var(--space-20);
  z-index: 1002;
  max-width: 400px;
}

.toast {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--space-8);
  animation: slideInRight 0.3s ease-out;
}

.toast--success {
  border-left: 4px solid var(--color-success);
}

.toast--error {
  border-left: 4px solid var(--color-error);
}

.toast--warning {
  border-left: 4px solid var(--color-warning);
}

.toast--info {
  border-left: 4px solid var(--color-info);
}

.toast-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-12) var(--space-16);
}

.toast-message {
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.toast-close {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--font-size-lg);
  line-height: 1;
  padding: 0;
  margin-left: var(--space-12);
}

.toast-close:hover {
  color: var(--color-text);
}

/* Error Boundary */
.error-boundary {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1003;
  backdrop-filter: blur(4px);
}

.error-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  max-width: 400px;
  text-align: center;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

.error-icon {
  font-size: 3rem;
  margin-bottom: var(--space-16);
}

.error-content h3 {
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.error-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-24);
}

.error-actions {
  display: flex;
  gap: var(--space-12);
  justify-content: center;
}

/* Animations */
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

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

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }

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

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }

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

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

/* ======================================= */
/* ====== RESPONSIVE DESIGN STYLES ====== */
/* ======================================= */

/* Medium devices (tablets, less than 1024px) */
@media (max-width: 1024px) {
  .friends-panel {
    width: 280px; /* Slim down the friends panel on smaller desktops/tablets */
  }
}

/* Small devices (landscape phones, tablets, less than 768px) */
@media (max-width: 768px) {
  
  /* FIXED: New, more stable mobile layout system */
  .chat-main {
      width: 200%; /* Container is twice the screen width */
      display: flex;
      transition: transform 0.3s ease-in-out;
  }
  .friends-panel, .chat-panel {
      width: 50%; /* Each panel takes up half the container, i.e., 100% of the screen */
      border-right: none;
      height: 100%;
  }
  .chat-main.mobile-chat-active {
      transform: translateX(-50%); /* Slide the container to show the second panel */
  }
  .mobile-chat-active .mobile-back {
    display: block;
  }

  .message-bubble {
    max-width: 85%;
  }

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

  .auth-card {
    padding: var(--space-24);
  }

  .chat-header {
    padding: var(--space-12) var(--space-16);
    --header-height: 56px;
  }

  .header-content h1 {
    font-size: var(--font-size-xl);
  }

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

  .connection-status, .current-user {
    display: none;
  }

  .welcome-stats {
    flex-direction: column;
    gap: var(--space-16);
  }

  .messages-area {
    padding: var(--space-12) var(--space-16);
  }

  .message-input-area {
    padding: var(--space-12) var(--space-16);
  }

  .chat-window-header {
    padding: var(--space-12) var(--space-16);
  }

  .friend-search-section,
  .section-header {
    padding: var(--space-12);
  }

  .friends-list {
    padding: var(--space-8) var(--space-12);
  }

  .toast-container {
    top: var(--space-12);
    right: var(--space-12);
    left: var(--space-12);
    max-width: none;
    width: auto;
  }
}

/* Extra small devices (phones, less than 480px) */
@media (max-width: 480px) {
  .auth-card {
    padding: var(--space-16);
  }
  
  .header-content h1 {
    font-size: var(--font-size-lg);
  }

  .recipient-info h4 {
    font-size: var(--font-size-base);
  }

  .recipient-avatar {
    width: 36px;
    height: 36px;
    margin-right: var(--space-12);
  }

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

  .welcome-icon {
    font-size: 3rem;
  }

  .message-input-area {
    padding: var(--space-8) var(--space-12);
  }

  .messages-area {
    padding: var(--space-8) var(--space-12);
  }

  .character-count {
    display: none; /* Hide character count on very small screens to save space */
  }

  .search-results {
    max-height: 150px;
  }
}

/* Utility Classes */
.hidden {
  display: none !important;
}

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

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .btn {
    border-width: 2px;
  }

  .form-control {
    border-width: 2px;
  }

  .message-bubble {
    border-width: 2px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .loading-spinner,
  .loading-spinner-sm,
  .connection-spinner {
    animation: none;
  }

  .status-indicator.online,
  .status-dot {
    animation: none;
  }
}

/* Print Styles */
@media print {

  .chat-header,
  .friends-panel,
  .message-input-area,
  .loading-overlay,
  .toast-container,
  .error-boundary {
    display: none !important;
  }

  .chat-main {
    height: auto;
  }

  .messages-area {
    height: auto;
  }

  .message {
    break-inside: avoid;
  }
}

/* Scrollbar Styles */
.friends-list::-webkit-scrollbar,
.messages-area::-webkit-scrollbar,
.search-results::-webkit-scrollbar,
.friend-requests-list::-webkit-scrollbar {
  width: 6px;
}

.friends-list::-webkit-scrollbar-track,
.messages-area::-webkit-scrollbar-track,
.search-results::-webkit-scrollbar-track,
.friend-requests-list::-webkit-scrollbar-track {
  background: var(--color-background);
}

.friends-list::-webkit-scrollbar-thumb,
.messages-area::-webkit-scrollbar-thumb,
.search-results::-webkit-scrollbar-thumb,
.friend-requests-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-sm);
}

.friends-list::-webkit-scrollbar-thumb:hover,
.messages-area::-webkit-scrollbar-thumb:hover,
.search-results::-webkit-scrollbar-thumb:hover,
.friend-requests-list::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* Focus Styles for Accessibility */
.btn:focus-visible,
.form-control:focus-visible,
.friend-item:focus-visible,
.search-result-item:focus-visible,
.friend-request-item:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Selection Styles */
::selection {
  background: rgba(var(--color-primary-rgb, 33, 128, 141), 0.2);
}

.search-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-16);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

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

.add-friend-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--color-text-secondary) !important;
}