/* ============================================================
   AI Token Price Compare — Premium Dark Theme Stylesheet
   ============================================================
   Design System: Dark glassmorphism with electric blue accents
   Font: Inter (Google Fonts)
   Author: AI Token Compare
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-color: rgba(255, 255, 255, 0.1);

  /* Brand */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.3);
  --secondary: #f97316;
  --secondary-glow: rgba(249, 115, 22, 0.3);
  --accent: #10b981;
  --accent-glow: rgba(16, 185, 129, 0.25);
  --warning: #f59e0b;
  --warning-glow: rgba(245, 158, 11, 0.25);
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.25);

  /* Text */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--primary-glow);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Layout */
  --header-height: 72px;
  --container-max: 1280px;

  /* Card specific backgrounds */
  --bg-action-bar: rgba(255, 255, 255, 0.02);
  --bg-card-alt: rgba(255, 255, 255, 0.02);
  --bg-header: rgba(10, 14, 26, 0.8);
}

[data-theme="light"] {
  --bg-primary: #f4f7f9;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --border-color: rgba(0, 0, 0, 0.1);

  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.2);
  --secondary: #ea580c;
  --secondary-glow: rgba(234, 88, 12, 0.2);
  --accent: #059669;
  --accent-glow: rgba(5, 150, 105, 0.2);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px var(--primary-glow);

  --bg-action-bar: rgba(255, 255, 255, 0.9);
  --bg-card-alt: rgba(0, 0, 0, 0.03);
  --bg-header: rgba(244, 247, 249, 0.9);
}

/* ── CSS Reset / Normalize ────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary) var(--bg-secondary);
}

/* ── Selection ────────────────────────────────────────────── */
::selection {
  background: var(--primary);
  color: #ffffff;
}

::-moz-selection {
  background: var(--primary);
  color: #ffffff;
}

/* ── Container & Layout Utilities ─────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

.section {
  padding-top: var(--space-md);
  padding-bottom: var(--space-3xl);
}

/* ── Utility Classes ──────────────────────────────────────── */
.flex          { display: flex; }
.flex-col      { flex-direction: column; }
.flex-wrap     { flex-wrap: wrap; }
.items-center  { align-items: center; }
.items-start   { align-items: flex-start; }
.items-end     { align-items: flex-end; }
.justify-center   { justify-content: center; }
.justify-between  { justify-content: space-between; }
.justify-end      { justify-content: flex-end; }

.gap-xs  { gap: var(--space-xs); }
.gap-sm  { gap: var(--space-sm); }
.gap-md  { gap: var(--space-md); }
.gap-lg  { gap: var(--space-lg); }
.gap-xl  { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

.hidden  { display: none !important; }
.visible { display: block !important; }

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

.text-primary-color { color: var(--primary) !important; }
.text-accent        { color: var(--accent) !important; }
.text-warning       { color: var(--warning) !important; }
.text-danger        { color: var(--danger) !important; }
.text-secondary-color { color: var(--text-secondary) !important; }
.text-muted-color   { color: var(--text-muted) !important; }

.font-light    { font-weight: 300; }
.font-normal   { font-weight: 400; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }
.font-black    { font-weight: 900; }

.w-full { width: 100%; }
.relative { position: relative; }

/* ── Gradient Text ────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Glow Effect ──────────────────────────────────────────── */
.glow {
  box-shadow: var(--shadow-glow);
}

.glow-accent {
  box-shadow: 0 0 20px var(--accent-glow);
}

.glow-warning {
  box-shadow: 0 0 20px var(--warning-glow);
}

/* ── Card Base ────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   HEADER / NAVBAR
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 1px 20px rgba(59, 130, 246, 0.06);
  transition: background var(--transition-base);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 800;
  font-size: 1.25rem;
  white-space: nowrap;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  background: transparent;
  display: inline-block;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
  transform: scale(1.05);
}

.nav-links a.active {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 4px 12px var(--primary-glow);
}

/* ── Cascading Nav Dropdown ── */
.nav-dropdown-container {
  position: relative;
  display: inline-block;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 100;
  list-style: none;
  padding: var(--space-xs) 0;
  margin: 0;
}

.nav-dropdown-container:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-provider-item {
  padding: var(--space-sm) var(--space-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-base);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 0;
}

.dropdown-provider-item:hover {
  background: var(--bg-card-hover);
  color: var(--primary);
}

.dropdown-submenu {
  position: relative;
}

/* Hidden by default, shown via JS .visible class */
.provider-model-submenu {
  display: none;
  position: absolute;
  top: 0;
  left: 100%;
  min-width: 220px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  list-style: none;
  padding: var(--space-xs) 0;
  margin: 0;
  z-index: 101;
  max-height: 400px;
  overflow-y: auto;
}

.provider-model-submenu.visible {
  display: block;
}

.provider-model-item {
  padding: var(--space-sm) var(--space-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  transition: background var(--transition-base);
}

.provider-model-item:hover {
  background: var(--bg-card-hover);
  color: var(--primary);
}

.model-price-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

@media (max-width: 768px) {
  .nav-dropdown-menu {
    display: none !important;
  }
}

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

.theme-toggle-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  transition: background var(--transition-base), transform var(--transition-base);
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  transform: scale(1.1);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  padding: var(--space-xl);
  flex-direction: column;
  gap: var(--space-lg);
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-color);
  transition: color var(--transition-base);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--primary);
}

/* Spacer for fixed header */
.header-spacer {
  height: var(--header-height);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-md) 0;
  text-align: center;
  overflow: hidden;
  min-height: auto;
  display: flex;
  align-items: center;
}

/* Animated gradient background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 60%);
  animation: gradientShift 8s ease-in-out infinite;
  z-index: 0;
}

/* Floating particles layer */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.hero-particles .particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 6s ease-in-out infinite;
}

.hero-particles .particle:nth-child(2) {
  width: 6px;
  height: 6px;
  background: var(--secondary);
  animation-delay: -2s;
  animation-duration: 8s;
}

.hero-particles .particle:nth-child(3) {
  width: 3px;
  height: 3px;
  background: var(--accent);
  animation-delay: -4s;
  animation-duration: 7s;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
  font-weight: 400;
  line-height: 1.7;
}

/* Hero search bar */
.hero-search {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}

.hero-search input {
  width: 100%;
  padding: var(--space-md) var(--space-xl);
  padding-left: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 1rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  outline: none;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              background var(--transition-base);
}

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

.hero-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow), var(--shadow-lg);
  background: var(--bg-card-hover);
}

.hero-search .search-icon {
  position: absolute;
  left: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
  pointer-events: none;
  transition: color var(--transition-base);
}

.hero-search input:focus ~ .search-icon {
  color: var(--primary);
}

/* ── Action Bar (Search & Stats below highlight) ────────────── */
.action-bar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-action-bar);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
}

.search-container {
  flex: 1;
  max-width: 400px;
  min-width: 280px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 12px 20px 12px 45px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-base);
  outline: none;
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-card-hover);
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--transition-base);
}

.search-input:focus ~ .search-icon {
  color: var(--primary);
}

.action-bar-stats {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

@media (max-width: 768px) {
  .action-bar-row {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-lg);
  }
  
  .search-container {
    max-width: 100%;
  }

  .action-bar-stats {
    justify-content: space-between;
    width: 100%;
  }
}

/* ============================================================
   NAVIGATION TABS
   ============================================================ */
.nav-tabs {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  border-bottom: 1px solid var(--border-color);
  padding: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.nav-tabs::-webkit-scrollbar {
  display: none;
}

.nav-tab {
  padding: var(--space-md) var(--space-xl);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-base);
}

.nav-tab::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: var(--space-md);
  right: var(--space-md);
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full) var(--radius-full) 0 0;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-tab:hover {
  color: var(--text-primary);
}

.nav-tab.active {
  color: var(--primary);
}

.nav-tab.active::after {
  transform: scaleX(1);
  box-shadow: 0 0 8px var(--primary-glow);
}

/* ============================================================
   FILTER BAR
   ============================================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.filter-group-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: var(--space-xs);
}

.filter-chip {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-base);
}

.filter-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(59, 130, 246, 0.08);
}

.filter-chip.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.filter-chip.active:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #ffffff;
}

/* Sort dropdown */
.sort-select {
  padding: var(--space-xs) var(--space-md);
  padding-right: var(--space-xl);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.sort-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.sort-select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* ============================================================
   PRICE TABLE
   ============================================================ */
.price-table {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.price-table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.price-table table {
  width: 100%;
  min-width: 700px;
  font-size: 0.875rem;
}

.price-table thead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-secondary);
}

.price-table thead th {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.price-table tbody tr {
  transition: background var(--transition-base);
  border-bottom: 1px solid var(--border-color);
}

.price-table tbody tr:last-child {
  border-bottom: none;
}

.price-table tbody tr:hover {
  background: var(--bg-card-hover);
}

.price-table tbody tr:nth-child(even) {
  background: var(--bg-card-alt);
}

.price-table tbody tr:nth-child(even):hover {
  background: var(--bg-card-hover);
}

.price-table tbody td {
  padding: var(--space-md) var(--space-lg);
  color: var(--text-primary);
  vertical-align: middle;
}

/* Provider cell with logo */
.provider-cell {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.provider-logo {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.provider-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.provider-name {
  font-weight: 600;
  white-space: nowrap;
}

/* Price styling */
.cheapest {
  color: var(--accent) !important;
  font-weight: 700;
}

.cheapest td,
.cheapest .price-value {
  color: var(--accent) !important;
}

tr.cheapest {
  background: rgba(16, 185, 129, 0.06) !important;
  box-shadow: inset 0 0 30px rgba(16, 185, 129, 0.04);
}

tr.cheapest:hover {
  background: rgba(16, 185, 129, 0.1) !important;
}

.expensive {
  color: var(--danger) !important;
}

.price-value {
  font-family: 'Inter', monospace;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  white-space: nowrap;
  line-height: 1.6;
}

.badge-promo {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-new {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.badge-cheapest {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-expensive {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-neutral {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-secondary);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

/* ============================================================
   COMPARE SECTION
   ============================================================ */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.compare-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.compare-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border-color);
  transition: background var(--transition-base);
}

.compare-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.compare-card.cheapest-card {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.compare-card.cheapest-card::before {
  background: linear-gradient(90deg, var(--accent), rgba(16, 185, 129, 0.3));
}

/* Provider brand colors on top border */
.compare-card[data-provider="openai"]::before      { background: #10a37f; }
.compare-card[data-provider="anthropic"]::before    { background: #d97757; }
.compare-card[data-provider="google"]::before       { background: #4285f4; }
.compare-card[data-provider="mistral"]::before      { background: #f97316; }
.compare-card[data-provider="cohere"]::before       { background: #6366f1; }

.compare-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.compare-card-provider {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1rem;
}

.compare-card-price {
  font-size: 1.75rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.compare-card-unit {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
}

.price-diff-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.price-diff-badge.cheaper {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent);
}

.price-diff-badge.expensive-diff {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* ============================================================
   BEST PICKS SECTION
   ============================================================ */
.best-picks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.best-pick-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-height: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base),
              border-color var(--transition-base),
              background var(--transition-base),
              box-shadow var(--transition-base);
}

.best-pick-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.best-pick-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
}

.best-pick-kicker {
  margin-bottom: var(--space-xs);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.best-pick-model {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.25;
}

.provider-pill {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: var(--space-xs);
  padding: 0.35rem 0.65rem;
  background: var(--bg-card-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
}

.best-pick-summary {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.best-pick-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.best-pick-stat {
  padding: var(--space-md);
  background: var(--bg-card-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.best-pick-stat-label {
  display: block;
  margin-bottom: 2px;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.best-pick-stat strong {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
}

.best-pick-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.best-pick-footer {
  margin-top: auto;
}

.best-pick-action {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 800;
  box-shadow: 0 8px 20px var(--primary-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.best-pick-action:hover {
  box-shadow: 0 12px 26px var(--primary-glow);
  transform: translateY(-1px);
}

/* Legacy calculator styles retained for older embedded markup */
.calculator-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.calculator-inputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.input-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.input-group input[type="text"],
.input-group input[type="number"],
.input-group select {
  padding: var(--space-md);
  background: var(--bg-card-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              background var(--transition-base);
}

.input-group input:focus,
.input-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-action-bar);
}

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

.calc-input-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.calc-input-row input[type="range"] {
  flex: 1;
}

.calc-input-row input[type="number"] {
  width: 120px;
  text-align: right;
}

/* Custom Range Slider */
.input-group input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  outline: none;
  margin: var(--space-sm) 0;
}

.input-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 8px var(--primary-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.input-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 14px var(--primary-glow);
}

.input-group input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 8px var(--primary-glow);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Calculator Results — horizontal bar chart */
.calculator-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.calculator-results-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.result-item {
  display: grid;
  grid-template-columns: 140px 1fr 100px;
  align-items: center;
  gap: var(--space-md);
}

.result-item .provider-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-bar-track {
  height: 28px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.result-bar {
  height: 100%;
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  min-width: 4px;
  animation: barGrow 0.8s ease-out forwards;
  transform-origin: left center;
}

.result-bar.cheapest-bar {
  background: linear-gradient(90deg, var(--accent), #34d399);
}

.result-item .result-price {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   PROMO SECTION
   ============================================================ */
.promo-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.promo-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

/* Animated gradient border */
.promo-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: linear-gradient(
    135deg,
    var(--primary),
    var(--secondary),
    var(--accent),
    var(--warning),
    var(--primary)
  );
  background-size: 300% 300%;
  animation: gradientShift 4s ease infinite;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
          mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
}

.promo-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.promo-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.promo-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.promo-badge.active {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent);
  border: 1px solid rgba(16, 185, 129, 0.3);
  animation: pulse 2s ease-in-out infinite;
}

.promo-badge.expired {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-muted);
  border: 1px solid rgba(148, 163, 184, 0.15);
}

.promo-value {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.promo-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.promo-provider {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ============================================================
   TOGGLE SWITCH
   ============================================================ */
.toggle-container {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.toggle-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color var(--transition-base);
}

.toggle-label.active {
  color: var(--text-primary);
}

.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 2px;
  bottom: 2px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--primary);
  border-color: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
  background: #ffffff;
}

.toggle-switch input:focus + .toggle-slider {
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* ============================================================
   TOOLTIP
   ============================================================ */
.tooltip {
  position: relative;
  display: inline-flex;
  cursor: help;
}

.tooltip .tooltip-content {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.75rem;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-fast),
              transform var(--transition-fast),
              visibility var(--transition-fast);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

/* Arrow */
.tooltip .tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--bg-secondary);
}

.tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  padding: var(--space-lg);
}

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

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  max-width: 560px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-xl);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1.125rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  padding-right: var(--space-2xl);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

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

.footer-updated {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.7;
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ============================================================
   ANIMATIONS / KEYFRAMES
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.75;
    transform: scale(1.05);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0);
  }
  25% {
    transform: translateY(-20px) translateX(10px);
  }
  50% {
    transform: translateY(-10px) translateX(-5px);
  }
  75% {
    transform: translateY(-30px) translateX(5px);
  }
}

@keyframes barGrow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes borderRotate {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 300% 50%;
  }
}

/* ── Animation Utility Classes ────────────────────────────── */
.animate-fadeInUp {
  animation: fadeInUp 0.6s ease both;
}

.animate-fadeInUp-delay-1 {
  animation: fadeInUp 0.6s ease 0.1s both;
}

.animate-fadeInUp-delay-2 {
  animation: fadeInUp 0.6s ease 0.2s both;
}

.animate-fadeInUp-delay-3 {
  animation: fadeInUp 0.6s ease 0.3s both;
}

.animate-fadeInUp-delay-4 {
  animation: fadeInUp 0.6s ease 0.4s both;
}

/* Intersection Observer trigger */
.in-view-target {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.in-view-target.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.in-view-target.in-view:nth-child(1) { transition-delay: 0s; }
.in-view-target.in-view:nth-child(2) { transition-delay: 0.08s; }
.in-view-target.in-view:nth-child(3) { transition-delay: 0.16s; }
.in-view-target.in-view:nth-child(4) { transition-delay: 0.24s; }
.in-view-target.in-view:nth-child(5) { transition-delay: 0.32s; }
.in-view-target.in-view:nth-child(6) { transition-delay: 0.4s; }

/* Shimmer loading skeleton */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.03) 25%,
    rgba(255, 255, 255, 0.08) 50%,
    rgba(255, 255, 255, 0.03) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 14px;
  width: 80%;
  margin-bottom: var(--space-sm);
}

.skeleton-title {
  height: 22px;
  width: 60%;
  margin-bottom: var(--space-md);
}

.skeleton-block {
  height: 120px;
  width: 100%;
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  margin-bottom: var(--space-2xl);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-xl);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  line-height: 1.6;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  box-shadow: 0 0 16px var(--primary-glow);
}

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

.btn-outline:hover {
  background: var(--bg-card);
  border-color: var(--primary);
  color: var(--primary);
}

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

.btn-ghost:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8125rem;
}

.btn-lg {
  padding: var(--space-md) var(--space-2xl);
  font-size: 1rem;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ============================================================
   RESPONSIVE — MOBILE FIRST
   ============================================================ */

/* ── 480px and below (small phones) ───────────────────────── */
@media (max-width: 480px) {
  :root {
    --space-lg: 1rem;
    --space-xl: 1.25rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
  }

  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .hero {
    min-height: 320px;
    padding: var(--space-2xl) 0;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 0.9375rem;
  }

  .promo-grid {
    grid-template-columns: 1fr;
  }

  .compare-grid {
    grid-template-columns: 1fr;
  }

  .best-picks-grid {
    grid-template-columns: 1fr;
  }

  .best-pick-header {
    flex-direction: column;
  }

  .best-pick-meta {
    grid-template-columns: 1fr;
  }

  .result-item {
    grid-template-columns: 100px 1fr 80px;
    gap: var(--space-sm);
  }

  .result-item .provider-name {
    font-size: 0.75rem;
  }

  .calculator-inputs {
    grid-template-columns: 1fr;
  }

  .filter-bar {
    gap: var(--space-sm);
  }

  .promo-value {
    font-size: 1.5rem;
  }

  .modal-content {
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
  }
}

/* ── Up to 768px (tablets portrait and below) ─────────────── */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .header-controls .toggle-container {
    display: none;
  }

  .promo-grid {
    grid-template-columns: 1fr;
  }

  .compare-grid {
    grid-template-columns: 1fr;
  }

  .best-picks-grid {
    grid-template-columns: 1fr;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-md);
  }

  .nav-tab {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
  }

  .price-table table {
    font-size: 0.8125rem;
    display: block;
  }

  .price-table thead {
    display: none; /* Hide header on mobile */
  }

  .price-table tbody {
    display: block;
    width: 100%;
  }

  .price-table tbody tr {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--space-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) 0;
  }

  .price-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.04);
  }

  .price-table tbody td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    text-align: right; /* Right align the value */
  }

  .price-table tbody td:last-child {
    border-bottom: none;
  }

  .price-table tbody td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-secondary);
    margin-right: var(--space-md);
    text-align: left; /* Left align the label */
  }

  .calculator-container {
    padding: var(--space-lg);
  }

  .section-title {
    font-size: 1.375rem;
  }
}

/* ── Up to 1024px (tablets landscape) ─────────────────────── */
@media (max-width: 1024px) {
  .promo-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    min-height: 360px;
  }
}

/* ── 1280px and up (large desktop) ────────────────────────── */
@media (min-width: 1280px) {
  .container {
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
  }
}

/* ── Tablet → Mobile price table scroll ──────────────────── */
@media (max-width: 768px) {
  .price-table-scroll {
    margin-left: calc(-1 * var(--space-md));
    margin-right: calc(-1 * var(--space-md));
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .price-table {
    border-radius: var(--radius-lg);
  }
}

/* ============================================================
   MISC / EXTRA POLISH
   ============================================================ */

/* Focus-visible for accessibility */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
  outline: none;
}

/* Smooth transition on all interactive elements */
a,
button,
input,
select,
textarea {
  transition: color var(--transition-base),
              background var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base),
              opacity var(--transition-base);
}

/* Prevent layout shift on hover transforms */
.compare-card,
.promo-card,
.card {
  will-change: transform;
}

/* Disabled state */
.disabled,
[disabled] {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

/* Truncate text */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Divider */
.divider {
  height: 1px;
  background: var(--border-color);
  margin: var(--space-xl) 0;
}

/* Status dot (for live status indicators) */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.status-dot.online  { background: var(--accent); box-shadow: 0 0 6px var(--accent-glow); }
.status-dot.offline { background: var(--danger); }
.status-dot.warning { background: var(--warning); }

/* Chip / Tag */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  text-align: center;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
  opacity: 0.4;
}

.empty-state-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.empty-state-text {
  font-size: 0.875rem;
  max-width: 400px;
  line-height: 1.7;
}

/* ── Reduced Motion Preference ────────────────────────────── */
@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;
  }
}

/* ── Print Styles ─────────────────────────────────────────── */
@media print {
  .header,
  .hamburger,
  .mobile-nav,
  .footer,
  .hero-particles,
  .filter-bar,
  .modal-overlay {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .price-table {
    border: 1px solid #ccc;
  }

  .price-table thead th {
    background: #f0f0f0;
    color: #333;
  }

  .card,
  .compare-card,
  .promo-card,
  .calculator-container {
    border: 1px solid #ccc;
    background: #fff;
    backdrop-filter: none;
  }
}
.sortable {
  cursor: pointer;
  user-select: none;
  transition: color 0.2s;
}
.sortable:hover {
  color: var(--primary);
}
.sort-icon {
  font-size: 0.8em;
  opacity: 0.5;
  margin-left: 4px;
}
.sortable.active .sort-icon {
  opacity: 1;
  color: var(--primary);
}

.promo-title {
  font-size: 1.125rem;
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  line-height: 1.3;
}
.promo-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}
.promo-value {
  font-size: 1.25rem !important;
}
.promo-card {
  padding: var(--space-md) !important;
}

/* ============================================================
   MOBILE RESPONSIVE FIXES
   ============================================================ */
.price-table,
.price-table-container,
.table-wrapper {
  width: 100%;
}

.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: inherit;
}

.provider-dot {
  display: inline-block;
  width: 0.625rem;
  height: 0.625rem;
  margin-right: 0.5rem;
  border-radius: 50%;
  vertical-align: middle;
  flex: 0 0 auto;
}

.model-name-cell {
  display: block;
  font-weight: 700;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.cap-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.5rem;
}

.cap-badge,
.badge-original,
.badge-thirdparty {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
}

.cap-badge,
.badge-thirdparty {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.18);
  color: var(--primary);
}

.badge-original {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--accent);
}

.compare-placeholder {
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-xl);
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .header {
    height: auto;
    min-height: var(--header-height);
  }

  .header-inner {
    min-height: var(--header-height);
  }

  .header-controls {
    gap: var(--space-sm);
    flex-shrink: 0;
  }

  .mobile-nav {
    padding: var(--space-lg);
    overflow-y: auto;
  }

  .action-bar-row,
  .filter-bar {
    width: 100%;
  }

  .search-container {
    width: 100%;
    min-width: 0;
  }

  .search-container[style] {
    width: 100%;
    align-items: stretch;
  }

  .search-container > div[style] {
    min-width: 0;
  }

  #provider-select,
  #sort-select,
  .compare-select {
    min-height: 44px;
  }

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
    padding-top: var(--space-md);
  }

  .filter-group {
    flex-wrap: wrap;
  }

  .price-table,
  .table-wrapper {
    overflow: visible;
  }

  .price-table table,
  .price-table {
    min-width: 0;
  }

  .price-table tbody tr {
    overflow: hidden;
  }

  .price-table tbody td {
    align-items: flex-start;
    gap: var(--space-md);
    min-width: 0;
  }

  .price-table tbody td::before {
    flex: 0 0 42%;
    margin-right: 0;
    white-space: normal;
  }

  .price-table tbody td > * {
    min-width: 0;
  }

  .price-table tbody td:not(:first-child) {
    overflow-wrap: anywhere;
  }

  .price-table tbody td:first-child,
  .price-table tbody td:nth-child(2) {
    flex-wrap: wrap;
  }

  .price-table tbody td:first-child .provider-name,
  .price-table tbody td:nth-child(2) .model-name-cell {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .price-table tbody td:nth-child(2) {
    text-align: left;
  }

  .price-table tbody td:nth-child(2)::before {
    align-self: flex-start;
  }

  .cap-badges {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 var(--space-md);
    gap: var(--space-sm);
  }

  .logo {
    min-width: 0;
    font-size: 1rem;
  }

  .logo-text {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero {
    padding: calc(var(--header-height) + var(--space-lg)) 0 var(--space-sm) 0;
  }

  .action-bar-row {
    padding: var(--space-md);
    border-radius: var(--radius-xl);
  }

  .search-container[style] {
    flex-direction: column;
  }

  .search-container > .sort-select,
  #provider-select,
  #sort-select,
  .compare-select {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .action-bar-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-sm);
  }

  .stat-item {
    min-width: 0;
  }

  .stat-number {
    font-size: 1.25rem;
  }

  .stat-label {
    font-size: 0.7rem;
    letter-spacing: 0.04em;
  }

  .filter-group {
    width: 100%;
    align-items: flex-start;
  }

  .filter-label {
    width: 100%;
    margin-bottom: 0.25rem;
  }

  .section#section-compare > div[style] {
    gap: var(--space-md) !important;
    margin-bottom: var(--space-xl) !important;
  }

  .section#section-compare > div[style] > div:last-child {
    flex: 1 1 100% !important;
    min-width: 0 !important;
  }

  .price-table tbody td {
    gap: var(--space-sm);
    padding: var(--space-sm) 0.875rem;
  }

  .price-table tbody td::before {
    flex-basis: 38%;
  }
}