: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 */
[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;
}

*,
*::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 */
/* Import design system variables */

/* Custom theme variables for FrustroChat */
:root {
  /* Dark theme (default) */
  --fc-bg-primary: #000000;
  --fc-bg-secondary: #0a0a0a;
  --fc-bg-surface: rgba(255, 255, 255, 0.05);
  --fc-bg-elevated: rgba(255, 255, 255, 0.1);
  --fc-text-primary: #ffffff;
  --fc-text-secondary: rgba(255, 255, 255, 0.7);
  --fc-text-muted: rgba(255, 255, 255, 0.4);
  --fc-accent: #00d4ff;
  --fc-accent-secondary: #00ff88;
  --fc-border: rgba(255, 255, 255, 0.1);
  --fc-border-strong: rgba(255, 255, 255, 0.2);
  --fc-glass: rgba(0, 0, 0, 0.4);
  --fc-glass-border: rgba(255, 255, 255, 0.15);
  
  /* Gradients */
  --fc-gradient-primary: linear-gradient(135deg, #00d4ff 0%, #00ff88 100%);
  --fc-gradient-surface: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  --fc-gradient-orb-1: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
  --fc-gradient-orb-2: radial-gradient(circle, rgba(0, 255, 136, 0.2) 0%, transparent 70%);
  --fc-gradient-orb-3: radial-gradient(circle, rgba(138, 43, 226, 0.2) 0%, transparent 70%);
  
  /* Animation variables */
  --fc-easing: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --fc-spring: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --fc-duration-fast: 0.2s;
  --fc-duration-normal: 0.4s;
  --fc-duration-slow: 0.8s;
  
  /* Shadows */
  --fc-shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
  --fc-shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --fc-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --fc-shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
  --fc-shadow-glow-green: 0 0 30px rgba(0, 255, 136, 0.3);
}

[data-theme="light"] {
  --fc-bg-primary: #ffffff;
  --fc-bg-secondary: #f8f9fa;
  --fc-bg-surface: rgba(0, 0, 0, 0.02);
  --fc-bg-elevated: rgba(0, 0, 0, 0.05);
  --fc-text-primary: #1a1a1a;
  --fc-text-secondary: rgba(26, 26, 26, 0.7);
  --fc-text-muted: rgba(26, 26, 26, 0.4);
  --fc-accent: #3b82f6;
  --fc-accent-secondary: #10b981;
  --fc-border: rgba(0, 0, 0, 0.1);
  --fc-border-strong: rgba(0, 0, 0, 0.2);
  --fc-glass: rgba(255, 255, 255, 0.8);
  --fc-glass-border: rgba(0, 0, 0, 0.1);
  
  --fc-gradient-primary: linear-gradient(135deg, #3b82f6 0%, #10b981 100%);
  --fc-gradient-surface: linear-gradient(135deg, rgba(0, 0, 0, 0.02) 0%, rgba(0, 0, 0, 0.01) 100%);
  --fc-gradient-orb-1: radial-gradient(circle, rgba(59, 130, 246, 0.2) 0%, transparent 70%);
  --fc-gradient-orb-2: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
  --fc-gradient-orb-3: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, transparent 70%);
  
  --fc-shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
  --fc-shadow-md: 0 8px 30px rgba(0, 0, 0, 0.15);
  --fc-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.2);
  --fc-shadow-glow: 0 0 30px rgba(59, 130, 246, 0.2);
  --fc-shadow-glow-green: 0 0 30px rgba(16, 185, 129, 0.2);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--fc-bg-primary);
  color: var(--fc-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: all var(--fc-duration-normal) var(--fc-easing);
  min-height: 100vh;
}

/* Background Effects */
.background-effects {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  animation: float 20s ease-in-out infinite;
}

.orb-1 {
  width: 400px;
  height: 400px;
  top: -200px;
  right: -200px;
  background: var(--fc-gradient-orb-1);
  animation-delay: 0s;
}

.orb-2 {
  width: 300px;
  height: 300px;
  bottom: -150px;
  left: -150px;
  background: var(--fc-gradient-orb-2);
  animation-delay: 7s;
}

.orb-3 {
  width: 500px;
  height: 500px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--fc-gradient-orb-3);
  animation-delay: 14s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(20px, 10px) scale(1.02); }
}

/* Top Corner Elements */
.top-corner-elements {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 1001;
  transition: all var(--fc-duration-normal) var(--fc-easing);
}

.corner-username-badge {
  color: var(--fc-text-secondary);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  background: var(--fc-bg-elevated);
  border-radius: 15px;
  border: 1px solid var(--fc-border);
}

.corner-theme-toggle-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--fc-bg-elevated);
  border: 1px solid var(--fc-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--fc-duration-normal) var(--fc-spring);
}

.corner-theme-toggle-btn:hover {
  transform: scale(1.1);
  background: var(--fc-accent);
  border-color: var(--fc-accent);
  box-shadow: var(--fc-shadow-glow);
}

.theme-icon {
  font-size: 16px;
  transition: transform var(--fc-duration-normal) var(--fc-easing);
}

.corner-theme-toggle-btn:hover .theme-icon {
  transform: rotate(180deg);
}

/* Logo pinned to left corner */
.corner-logo {
    position: fixed;
    top: 10px;
    left: 20px;      /* Always left-most */
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0;
    z-index: 1100;   /* Above everything else */
    cursor: pointer;
}

/* Right-side elements */
.top-corner-elements {
    position: fixed;
    top: 10px;
    right: 10px;     /* Always right-most */
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
}

.corner-logo {
  font-size: 1.5rem;
  font-weight: 600;
  background: var(--fc-gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  cursor: pointer;
  transition: all var(--fc-duration-normal) var(--fc-easing);
}

.corner-logo:hover {
  transform: scale(1.05);
}

/* Enhanced Floating Navigation - Simplified */
.floating-nav {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  animation: navFloat 3s ease-in-out infinite;
}

@keyframes navFloat {
  0%, 100% { transform: translateX(-50%) translateY(0px); }
  50% { transform: translateX(-50%) translateY(-2px); }
}

/* Scrolled state - navbar becomes sticky top bar */
.floating-nav.navbar-scrolled {
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  transform: translateX(0);
  animation: none;
  background: var(--fc-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--fc-glass-border);
  padding: 0 24px;
}

.floating-nav.navbar-scrolled .nav-content {
  border-radius: 0;
  background: transparent;
  backdrop-filter: none;
  border: none;
  box-shadow: none;
  padding: 16px 0;
  max-width: 1200px;
  margin: 0 auto;
  justify-content: center;
}

.nav-content {
  background: var(--fc-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--fc-glass-border);
  border-radius: 50px;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--fc-shadow-md);
  transition: all var(--fc-duration-normal) var(--fc-easing);
}

.nav-content:hover {
  box-shadow: var(--fc-shadow-lg);
  transform: translateY(-2px);
}

.floating-nav.navbar-scrolled .nav-content:hover {
  transform: none;
}

.nav-center {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  color: var(--fc-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 20px;
  transition: all var(--fc-duration-fast) var(--fc-easing);
  position: relative;
  cursor: pointer;
}

.nav-link.active {
  color: var(--fc-accent);
  background: rgba(0, 212, 255, 0.1);
}

.nav-link:hover {
  color: var(--fc-text-primary);
  background: var(--fc-bg-elevated);
  transform: translateY(-1px);
}

.nav-separator {
  color: var(--fc-text-muted);
  font-size: 14px;
}

/* Bottom Floating Input Bar */
.bottom-input-bar {
  position: fixed;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  transition: all 0.3s ease-out;
  opacity: 0;
  visibility: hidden;
}

.bottom-input-bar.show {
  bottom: 20px;
  opacity: 1;
  visibility: visible;
}

.bottom-create-btn {
  background: var(--fc-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--fc-glass-border);
  color: var(--fc-text-secondary);
  padding: 16px 24px;
  border-radius: 50px;
  font-size: 16px;
  cursor: pointer;
  transition: all var(--fc-duration-normal) var(--fc-spring);
  position: relative;
  overflow: hidden;
  box-shadow: var(--fc-shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-width: 280px;
}

.bottom-create-btn:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--fc-shadow-glow);
  border-color: var(--fc-accent);
}

.bottom-create-btn .create-icon {
  font-size: 18px;
  transition: transform var(--fc-duration-normal) var(--fc-easing);
}

.bottom-create-btn:hover .create-icon {
  transform: rotate(20deg) scale(1.1);
}

/* Scroll to Top Button */
.scroll-top-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background: var(--fc-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--fc-glass-border);
  border-radius: 50%;
  color: var(--fc-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.8);
  transition: all var(--fc-duration-normal) var(--fc-spring);
  z-index: 1000;
  box-shadow: var(--fc-shadow-md);
}

.scroll-top-btn.show {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.scroll-top-btn:hover {
  background: var(--fc-accent);
  border-color: var(--fc-accent);
  color: white;
  transform: scale(1.1) translateY(-2px);
  box-shadow: var(--fc-shadow-glow);
}

.scroll-icon {
  transition: transform var(--fc-duration-fast) var(--fc-easing);
}

.scroll-top-btn:hover .scroll-icon {
  transform: translateY(-2px);
}

/* App Container */
.app-container {
  padding-top: 120px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Hero Section with Pinned Papers Layout */
.hero-section {
  text-align: center;
  margin-bottom: 80px;
  padding: 60px 0;
}

.hero-content {
  max-width: 1100px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300;
  margin-bottom: 24px;
  background: var(--fc-gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--fc-text-secondary);
  margin-bottom: 48px;
  font-weight: 400;
}

/* Hero Flex Layout with Pinned Papers */
.hero-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin: 48px 0;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.paper-note {
  background: rgba(255, 250, 180, 0.95);
  border: 1px solid rgba(200, 180, 100, 0.3);
  border-radius: 8px;
  padding: 20px;
  max-width: 280px;
  position: relative;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: all var(--fc-duration-normal) var(--fc-easing);
  color: #2c2c2c;
  font-family: 'Courier New', monospace;
}

[data-theme="dark"] .paper-note {
  background: rgba(255, 250, 180, 0.95);
  color: #2c2c2c;
}

[data-theme="light"] .paper-note {
  background: rgba(255, 250, 180, 0.98);
  color: #2c2c2c;
}

.paper-note.left {
  transform: rotate(-3deg);
}

.paper-note.right {
  transform: rotate(3deg);
}

.paper-note:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.paper-pin {
  position: absolute;
  top: -5px;
  right: 15px;
  font-size: 20px;
  filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.3));
}

.paper-note h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 8px;
  margin-top: 8px;
}

.paper-note p {
  font-size: 13px;
  color: #444;
  line-height: 1.4;
  margin-bottom: 12px;
}

.paper-list {
  list-style: none;
  padding: 0;
}

.paper-item {
  font-size: 12px;
  color: #555;
  margin-bottom: 4px;
  position: relative;
  padding-left: 0;
}

/* Share Bar in Center */
.hero-bar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.share-bar {
  background: var(--fc-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--fc-glass-border);
  color: var(--fc-text-secondary);
  padding: 20px 32px;
  border-radius: 50px;
  font-size: 18px;
  cursor: pointer;
  transition: all var(--fc-duration-normal) var(--fc-spring);
  position: relative;
  overflow: hidden;
  box-shadow: var(--fc-shadow-md);
  min-width: 320px;
}

.share-bar:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--fc-shadow-glow);
  border-color: var(--fc-accent);
}

.share-bar:active {
  transform: translateY(-4px) scale(1.01);
}

.share-bar-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  position: relative;
  z-index: 2;
}

.share-icon {
  font-size: 20px;
  transition: transform var(--fc-duration-normal) var(--fc-easing);
}

.share-bar:hover .share-icon {
  transform: rotate(20deg) scale(1.1);
}

.share-text {
  font-weight: 500;
}

.share-bar-ripple {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all var(--fc-duration-slow) var(--fc-easing);
}

.share-bar:hover .share-bar-ripple {
  width: 200%;
  height: 200%;
}

/* Stats Container */
.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  max-width: 600px;
  margin: 48px auto 0;
}

.stat-card {
  background: var(--fc-bg-surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--fc-border);
  border-radius: 24px;
  padding: 32px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all var(--fc-duration-normal) var(--fc-easing);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--fc-shadow-md);
  border-color: var(--fc-accent);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--fc-gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  line-height: 1;
}

.stat-label {
  font-size: 14px;
  color: var(--fc-text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--fc-gradient-primary);
  opacity: 0;
  transition: opacity var(--fc-duration-normal) var(--fc-easing);
  filter: blur(20px);
  transform: scale(0.8);
}

.stat-card:hover .stat-glow {
  opacity: 0.1;
}

/* Topics Section */
.topics-section {
  margin-bottom: 80px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--fc-border);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--fc-text-primary);
}

.refresh-btn {
  background: var(--fc-bg-surface);
  border: 1px solid var(--fc-border);
  color: var(--fc-text-secondary);
  padding: 10px 16px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--fc-duration-fast) var(--fc-easing);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}

.refresh-btn:hover {
  background: var(--fc-bg-elevated);
  color: var(--fc-text-primary);
  transform: translateY(-2px);
}

.refresh-icon {
  transition: transform var(--fc-duration-normal) var(--fc-easing);
}

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

/* Topics Masonry Layout */
.topics-masonry {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
  align-items: start;
}

.topic-card {
  background: var(--fc-bg-surface);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--fc-border);
  border-radius: 24px;
  padding: 28px;
  transition: all var(--fc-duration-normal) var(--fc-spring);
  position: relative;
  overflow: hidden;
  animation: slideInUp var(--fc-duration-slow) var(--fc-easing) both;
}

.topic-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--fc-shadow-glow);
  border-color: var(--fc-accent);
}

.topic-card:nth-child(2n) {
  animation-delay: 0.1s;
}

.topic-card:nth-child(3n) {
  animation-delay: 0.2s;
}

.topic-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.topic-info h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--fc-text-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.topic-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--fc-text-muted);
}

.topic-stats {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  font-size: 12px;
  color: var(--fc-text-muted);
}

.topic-content {
  color: var(--fc-text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.topic-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--fc-border);
}

.action-buttons {
  display: flex;
  gap: 12px;
}

.action-btn {
  background: transparent;
  border: none;
  color: var(--fc-text-muted);
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 16px;
  transition: all var(--fc-duration-fast) var(--fc-spring);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
}

.action-btn:hover {
  background: var(--fc-bg-elevated);
  color: var(--fc-text-secondary);
  transform: scale(1.05);
}

.action-btn.liked {
  color: #ff6b6b;
}

.action-btn.following {
  color: var(--fc-accent-secondary);
}

.action-btn.active {
  color: var(--fc-accent);
  background: rgba(0, 212, 255, 0.1);
}

/* Mood indicators */
.mood-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
}

.mood-frustrated { background: #ff4757; }
.mood-melancholy { background: #5352ed; }
.mood-anxious { background: #ffa502; }
.mood-angry { background: #ff3838; }
.mood-sad { background: #747d8c; }
.mood-hopeful { background: #2ed573; }
.mood-excited { background: #ff6348; }

/* Site Footer */
.site-footer {
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(20px) saturate(180%);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3rem 0;
  text-align: center;
  margin-top: 4rem;
  position: relative;
}

[data-theme="light"] .site-footer {
  background: rgba(255, 255, 255, 0.8);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-info {
  margin-bottom: 2rem;
}

.footer-info p {
  color: var(--fc-text-secondary);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.footer-info p:first-child {
  font-size: 18px;
  font-weight: 500;
  color: var(--fc-text-primary);
}

.footer-brand {
  padding-top: 1.5rem;
  border-top: 1px solid var(--fc-border);
}

.footer-brand p {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.footer-home-link {
  background: var(--fc-gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--fc-duration-normal) var(--fc-easing);
}

.footer-home-link:hover {
  opacity: 0.8;
  transform: scale(1.05);
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--fc-duration-normal) var(--fc-easing);
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
}

.modal-container {
  background: var(--fc-glass);
  backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid var(--fc-glass-border);
  border-radius: 24px;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow: hidden;
  position: relative;
  z-index: 2001;
  transform: scale(0.8) translateY(40px);
  transition: transform var(--fc-duration-normal) var(--fc-spring);
  box-shadow: var(--fc-shadow-lg);
}

.modal-overlay.show .modal-container {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 24px 28px;
  border-bottom: 1px solid var(--fc-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--fc-text-primary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--fc-text-muted);
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--fc-duration-fast) var(--fc-easing);
  font-size: 18px;
}

.modal-close:hover {
  color: var(--fc-text-primary);
  background: var(--fc-bg-elevated);
  transform: scale(1.1);
}

/* Form Styles */
.topic-form,
.reply-form {
  padding: 28px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--fc-text-primary);
  font-size: 14px;
}

.form-input {
  width: 100%;
  background: var(--fc-bg-primary);
  border: 1px solid var(--fc-border);
  color: var(--fc-text-primary);
  padding: 16px;
  border-radius: 16px;
  font-size: 15px;
  font-family: inherit;
  line-height: 1.5;
  transition: all var(--fc-duration-fast) var(--fc-easing);
  resize: vertical;
}

.form-input:focus {
  outline: none;
  border-color: var(--fc-accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
  background: var(--fc-bg-surface);
}

.form-input::placeholder {
  color: var(--fc-text-muted);
  opacity: 0.8;
}

.title-input {
  font-weight: 500;
}

.content-input,
.reply-input {
  min-height: 120px;
  font-family: inherit;
}

.char-counter {
  text-align: right;
  font-size: 12px;
  color: var(--fc-text-muted);
  margin-top: 6px;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding-top: 24px;
  border-top: 1px solid var(--fc-border);
}

/* Button Styles */
.btn {
  padding: 12px 24px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--fc-duration-normal) var(--fc-spring);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--fc-gradient-primary);
  color: white;
  box-shadow: var(--fc-shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--fc-shadow-glow);
}

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

.btn-secondary {
  background: var(--fc-bg-surface);
  color: var(--fc-text-secondary);
  border: 1px solid var(--fc-border);
}

.btn-secondary:hover {
  background: var(--fc-bg-elevated);
  color: var(--fc-text-primary);
}

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

.btn-loader {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Reply Preview */
.reply-preview {
  background: var(--fc-bg-primary);
  border: 1px solid var(--fc-border);
  border-radius: 16px;
  padding: 20px;
  margin: 0 28px 20px 28px;
}

.reply-preview h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--fc-text-primary);
}

.reply-preview p {
  color: var(--fc-text-secondary);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

/* Notification System */
.notification-container {
  position: fixed;
  top: 100px;
  right: 24px;
  z-index: 3000;
}

.notification {
  background: var(--fc-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--fc-glass-border);
  border-radius: 16px;
  padding: 16px 20px;
  box-shadow: var(--fc-shadow-md);
  transform: translateX(400px);
  transition: transform var(--fc-duration-normal) var(--fc-spring);
  max-width: 300px;
}

.notification.show {
  transform: translateX(0);
}

.notification-content {
  display: flex;
  align-items: center;
  gap: 12px;
}

.notification-text {
  color: var(--fc-text-primary);
  font-weight: 500;
  font-size: 14px;
}

/* Animations */
@keyframes slideInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-pulse {
  animation: pulse 0.6s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .top-corner-elements {
    top: 16px;
    right: 16px;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
  }

  .floating-nav {
    top: 16px;
    left: 16px;
    right: 16px;
    transform: none;
  }

  .floating-nav.navbar-scrolled {
    left: 0;
    right: 0;
    padding: 0 16px;
  }
  
  .nav-content {
    padding: 10px 16px;
  }
  
  .nav-center {
    gap: 12px;
  }
  
  .app-container {
    padding-top: 100px;
    padding-left: 16px;
    padding-right: 16px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-flex {
    flex-direction: column;
    gap: 2rem;
  }

  .paper-note {
    max-width: 100%;
    transform: none !important;
  }

  .share-bar {
    min-width: auto;
    padding: 16px 24px;
    font-size: 16px;
  }

  .bottom-create-btn {
    min-width: 250px;
    padding: 14px 20px;
  }

  .scroll-top-btn {
    bottom: 90px;
    right: 16px;
  }
  
  .stats-container {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .stat-card {
    padding: 24px 20px;
  }

  .site-footer {
    padding: 2rem 0;
  }

  .footer-content {
    padding: 0 16px;
  }
  
  .topics-masonry {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .topic-card {
    padding: 24px;
  }
  
  .topic-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .action-buttons {
    flex-wrap: wrap;
    gap: 8px;
  }
  
  .action-btn {
    padding: 6px 10px;
    font-size: 12px;
  }
  
  .modal-container {
    width: 95%;
    margin: 16px;
  }
  
  .modal-header,
  .topic-form,
  .reply-form {
    padding: 20px;
  }
  
  .notification-container {
    top: 80px;
    right: 16px;
    left: 16px;
  }
  
  .notification {
    transform: translateY(-100px);
    max-width: none;
  }
  
  .notification.show {
    transform: translateY(0);
  }
}