:root {
  /* Brand colors - Indigo palette */
  --primary: #6366F1;
  --primary-hover: #4F46E5;
  --primary-light: rgba(99, 102, 241, 0.12);
  --primary-glow: rgba(99, 102, 241, 0.3);
  --gradient-primary: linear-gradient(135deg, #6366F1, #8B5CF6, #A855F7);
  --gradient-hero: linear-gradient(135deg, #0F0B1E 0%, #1A1040 30%, #1E1040 60%, #0F0B1E 100%);

  /* Neutrals */
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;

  /* Semantic */
  --success: #10B981;
  --success-light: rgba(16, 185, 129, 0.12);
  --warning: #F59E0B;
  --warning-light: rgba(245, 158, 11, 0.12);
  --error: #EF4444;
  --error-light: rgba(239, 68, 68, 0.12);
  --info: #3B82F6;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15), 0 0 40px rgba(139, 92, 246, 0.1);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 10px 30px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(99, 102, 241, 0.1);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 9999px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Layout */
  --max-width: 1200px;
  --navbar-height: 68px;
}

/* Dark mode overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --gray-50: #0F172A;
    --gray-100: #1E293B;
    --gray-200: #334155;
    --gray-300: #475569;
    --gray-400: #64748B;
    --gray-500: #94A3B8;
    --gray-600: #CBD5E1;
    --gray-700: #E2E8F0;
    --gray-800: #F1F5F9;
    --gray-900: #F8FAFC;
    --white: #1E293B;
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.15);
    --shadow-card-hover: 0 10px 30px rgba(0, 0, 0, 0.3), 0 4px 10px rgba(99, 102, 241, 0.15);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ====== Navigation ====== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: 40px;
}

.navbar-logo {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.3px;
}

.navbar-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  -webkit-text-fill-color: white;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.navbar-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-500);
  transition: color var(--transition-fast);
  position: relative;
  padding: 4px 0;
}

.navbar-links a:hover {
  color: var(--gray-700);
}

.navbar-links a.active {
  color: var(--primary);
}

.navbar-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--gradient-primary);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar-actions .btn {
  padding: 8px 18px;
  font-size: 14px;
}

/* Mobile menu toggle */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
}

.navbar-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-600);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  text-decoration: none;
  line-height: 1.4;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

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

.btn-secondary {
  background: rgba(99, 102, 241, 0.08);
  color: var(--primary);
}

.btn-secondary:hover {
  background: rgba(99, 102, 241, 0.15);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid var(--gray-200);
}

.btn-ghost:hover {
  background: var(--gray-100);
  border-color: var(--gray-300);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ====== Hero Section ====== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gradient-hero);
  padding: 120px 0 80px;
}

.hero-bg-effects {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-glow-1 {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: float-glow 8s ease-in-out infinite;
}

.hero-glow-2 {
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: float-glow 10s ease-in-out infinite reverse;
}

.hero-glow-3 {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, transparent 60%);
  border-radius: 50%;
  animation: float-glow 12s ease-in-out infinite 2s;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-stars {
  position: absolute;
  inset: 0;
}

.hero-star {
  position: absolute;
  width: 2px;
  height: 2px;
  background: white;
  border-radius: 50%;
  opacity: 0.3;
  animation: twinkle 3s ease-in-out infinite;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.2);
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  animation: fadeInUp 0.6s ease-out;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10B981;
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(16px, 2.2vw, 20px);
  color: rgba(255, 255, 255, 0.6);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-actions .btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.hero-actions .btn-ghost {
  border-color: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.8);
}

.hero-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-top: 60px;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

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

.hero-stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--white);
}

.hero-stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 2px;
}

/* ====== Section Common ====== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: clamp(28px, 3.5vw, 36px);
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 17px;
  color: var(--gray-500);
  max-width: 500px;
  margin: 0 auto;
}

.section-header .section-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ====== Model Cards Grid ====== */
.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 20px;
}

.model-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 24px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
  position: relative;
  cursor: default;
}

.model-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(99, 102, 241, 0.3);
}

.model-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.model-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  flex-shrink: 0;
}

.model-card-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.model-card-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 2px;
}

.model-card-provider {
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 16px;
}

.model-card-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}

.model-card-spec {
  font-size: 13px;
  color: var(--gray-500);
  padding: 6px 10px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
}

.model-card-spec .spec-label {
  font-size: 11px;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1px;
}

.model-card-spec .spec-value {
  font-weight: 600;
  color: var(--gray-700);
}

.model-card-actions {
  margin-top: 4px;
}

/* ====== Tags / Badges ====== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.tag-active {
  background: var(--success-light);
  color: var(--success);
}

.tag-coming {
  background: var(--warning-light);
  color: var(--warning);
}

.tag-free {
  background: var(--primary-light);
  color: var(--primary);
}

.tag-speed {
  background: var(--gray-100);
  color: var(--gray-600);
}

.tag-speed-fast { color: var(--success); background: var(--success-light); }
.tag-speed-medium { color: var(--warning); background: var(--warning-light); }
.tag-speed-slow { color: var(--error); background: var(--error-light); }

/* ====== Features Section ====== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 32px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.feature-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ====== Pricing Section (landing) ====== */
.pricing-preview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.pricing-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  padding: 36px 28px;
  border: 1px solid var(--gray-200);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
}

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

.pricing-card.featured {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.1), var(--shadow-md);
  background: linear-gradient(180deg, var(--white) 0%, rgba(99, 102, 241, 0.02) 100%);
}

.pricing-card.featured .pricing-badge {
  background: var(--gradient-primary);
  color: white;
}

.pricing-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  margin-bottom: 16px;
  background: var(--gray-100);
  color: var(--gray-600);
}

.pricing-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 42px;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.pricing-price .unit {
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-400);
  letter-spacing: 0;
}

.pricing-desc {
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 24px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 28px;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--gray-100);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

/* ====== CTA Section ====== */
.cta-section {
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding: 100px 0;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
  animation: float-glow 15s ease-in-out infinite;
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 24px;
}

.cta-content h2 {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 800;
  color: white;
  letter-spacing: -1px;
  margin-bottom: 14px;
}

.cta-content p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 32px;
}

.cta-content .btn-primary {
  box-shadow: 0 4px 24px rgba(99, 102, 241, 0.4);
}

/* ====== Stats Section ====== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  text-align: center;
}

.stat-item {
  padding: 32px 16px;
}

.stat-number {
  font-size: 36px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 14px;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ====== Footer ====== */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 18px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-200);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--gray-400);
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--gray-200);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
}

/* ====== Pricing Page Specific ====== */
.pricing-page-hero {
  padding: 120px 0 40px;
  text-align: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.pricing-page-hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  color: white;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.pricing-page-hero p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.6);
  max-width: 500px;
  margin: 0 auto;
}

/* Filter bar */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-tabs {
  display: flex;
  gap: 4px;
  background: var(--gray-100);
  padding: 4px;
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.filter-tab {
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-500);
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  color: var(--gray-700);
}

.filter-tab.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-xs);
}

.filter-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
  min-width: 200px;
}

.filter-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.filter-search input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  color: var(--gray-700);
  width: 100%;
}

.filter-search .search-icon {
  color: var(--gray-400);
  font-size: 14px;
  flex-shrink: 0;
}

/* ====== Skeleton Loading ====== */
.skeleton {
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton-card {
  height: 220px;
  border-radius: var(--radius-xl);
}

/* ====== Animations ====== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float-glow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.05); }
}

@keyframes twinkle {
  0%, 100% { opacity: 0.2; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.5); }
}

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

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ====== Dark Mode Sections ====== */
.section-alt {
  background: var(--white);
}

.section-white {
  background: var(--gray-50);
}

/* ====== Utility ====== */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* Tooltip */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: var(--gray-900);
  color: white;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-fast);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* Status indicator */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online { background: var(--success); }
.status-dot.offline { background: var(--gray-300); }
.status-dot.warning { background: var(--warning); }

/* ====== Responsive ====== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --navbar-height: 60px;
  }

  .navbar-toggle {
    display: flex;
  }

  .navbar-links {
    display: none;
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
  }

  .navbar-links.open {
    display: flex;
  }

  .navbar-links a {
    padding: 12px 8px;
    font-size: 16px;
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .navbar-links a:hover {
    background: var(--gray-50);
  }

  .navbar-links a.active::after {
    display: none;
  }

  .navbar-links a.active {
    background: var(--primary-light);
  }

  .navbar-left {
    gap: 16px;
  }

  .navbar-actions .btn-ghost {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 100px 0 60px;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 24px;
  }

  .hero-stat-value {
    font-size: 24px;
  }

  .section {
    padding: 60px 0;
  }

  .model-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
  }

  .filter-tab {
    padding: 6px 14px;
    font-size: 12px;
    white-space: nowrap;
  }

  .filter-search {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .pricing-preview {
    grid-template-columns: 1fr;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .navbar-inner {
    padding: 0 12px;
  }

  .container {
    padding: 0 12px;
  }

  .hero h1 {
    letter-spacing: -1px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .model-card-specs {
    grid-template-columns: 1fr 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-number {
    font-size: 28px;
  }
}