/* ============================================
   VN ModStore — Premium Dark Theme CSS
   ============================================ */

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

/* ---------- CSS Variables (Design Tokens) ---------- */
:root {
  /* Colors */
  --bg-primary: #07070d;
  --bg-secondary: #0d0d16;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(15, 15, 25, 0.7);
  
  --accent-primary: #7c3aed;
  --accent-primary-light: #a855f7;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #06b6d4 100%);
  --accent-gradient-btn: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
  --accent-glow: 0 0 30px rgba(124, 58, 237, 0.3);
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-color: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(124, 58, 237, 0.3);
  
  /* Platform Colors */
  --ios-color: #0ea5e9;
  --ios-glow: rgba(14, 165, 233, 0.3);
  --android-color: #22c55e;
  --android-glow: rgba(34, 197, 94, 0.3);
  --pc-color: #f97316;
  --pc-glow: rgba(249, 115, 22, 0.3);
  
  /* Spacing */
  --section-padding: 100px 0;
  --container-width: 1200px;
  --card-radius: 20px;
  --btn-radius: 12px;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary-light);
}

/* ---------- Animated Background ---------- */
.bg-gradient-animated {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.bg-gradient-animated::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(168, 85, 247, 0.05) 0%, transparent 50%);
  animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(2%, -2%) rotate(1deg); }
  66% { transform: translate(-1%, 1%) rotate(-0.5deg); }
}

/* ---------- Particles ---------- */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-primary-light);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 8s ease-in-out infinite;
}

.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; animation-duration: 10s; }
.particle:nth-child(2) { left: 25%; top: 60%; animation-delay: 1s; animation-duration: 12s; }
.particle:nth-child(3) { left: 40%; top: 30%; animation-delay: 2s; animation-duration: 9s; }
.particle:nth-child(4) { left: 55%; top: 70%; animation-delay: 3s; animation-duration: 11s; }
.particle:nth-child(5) { left: 70%; top: 15%; animation-delay: 4s; animation-duration: 8s; }
.particle:nth-child(6) { left: 85%; top: 50%; animation-delay: 5s; animation-duration: 13s; }
.particle:nth-child(7) { left: 15%; top: 80%; animation-delay: 6s; animation-duration: 10s; }
.particle:nth-child(8) { left: 60%; top: 45%; animation-delay: 7s; animation-duration: 9s; }

@keyframes particleFloat {
  0%, 100% { opacity: 0; transform: translateY(0) scale(1); }
  10% { opacity: 0.6; }
  50% { opacity: 0.3; transform: translateY(-100px) scale(1.5); }
  90% { opacity: 0.6; }
}

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

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition-smooth);
  backdrop-filter: blur(0px);
}

.navbar.scrolled {
  padding: 10px 0;
  background: rgba(7, 7, 13, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.nav-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: var(--accent-gradient-btn);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: var(--accent-glow);
}

.nav-logo span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 10px 20px;
  border-radius: var(--btn-radius);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  position: relative;
  overflow: hidden;
  transition: var(--transition-fast);
}

.nav-links a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.nav-links a:hover::before {
  width: 60%;
}

.nav-links a.active {
  color: var(--text-primary);
  background: rgba(124, 58, 237, 0.12);
}

.nav-links a.active::before {
  width: 60%;
}

/* Platform-specific nav active states */
.nav-links a.active.ios-active { background: rgba(14, 165, 233, 0.12); }
.nav-links a.active.ios-active::before { background: var(--ios-color); }
.nav-links a.active.android-active { background: rgba(34, 197, 94, 0.12); }
.nav-links a.active.android-active::before { background: var(--android-color); }
.nav-links a.active.pc-active { background: rgba(249, 115, 22, 0.12); }
.nav-links a.active.pc-active::before { background: var(--pc-color); }

/* Mobile Menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-primary-light);
  margin-bottom: 32px;
  animation: fadeInUp 0.6s ease-out;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

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

.hero h1 .neon-glow {
  text-shadow: 
    0 0 10px rgba(124, 58, 237, 0.5),
    0 0 40px rgba(124, 58, 237, 0.2);
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--btn-radius);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient-btn);
  color: white;
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(124, 58, 237, 0.4);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: 0.5s;
}

.btn-primary:hover::after {
  left: 100%;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.9rem;
}

.btn-ios { background: linear-gradient(135deg, #0284c7, #0ea5e9); box-shadow: 0 4px 20px var(--ios-glow); }
.btn-android { background: linear-gradient(135deg, #16a34a, #22c55e); box-shadow: 0 4px 20px var(--android-glow); }
.btn-pc { background: linear-gradient(135deg, #ea580c, #f97316); box-shadow: 0 4px 20px var(--pc-glow); }

/* ---------- Section Common ---------- */
.section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
}

.section-header .tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ---------- Platform Cards (Homepage) ---------- */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.platform-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 48px 32px;
  text-align: center;
  transition: var(--transition-smooth);
  overflow: hidden;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--card-radius) var(--card-radius) 0 0;
  transition: var(--transition-smooth);
}

.platform-card.ios::before { background: linear-gradient(90deg, #0284c7, #0ea5e9, #38bdf8); }
.platform-card.android::before { background: linear-gradient(90deg, #16a34a, #22c55e, #4ade80); }
.platform-card.pc::before { background: linear-gradient(90deg, #ea580c, #f97316, #fb923c); }

.platform-card:hover {
  transform: translateY(-8px);
  border-color: transparent;
  background: var(--bg-card-hover);
}

.platform-card.ios:hover { box-shadow: 0 20px 60px var(--ios-glow), inset 0 0 0 1px rgba(14, 165, 233, 0.2); }
.platform-card.android:hover { box-shadow: 0 20px 60px var(--android-glow), inset 0 0 0 1px rgba(34, 197, 94, 0.2); }
.platform-card.pc:hover { box-shadow: 0 20px 60px var(--pc-glow), inset 0 0 0 1px rgba(249, 115, 22, 0.2); }

.platform-card .icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 24px;
  transition: var(--transition-smooth);
}

.platform-card.ios .icon { background: rgba(14, 165, 233, 0.1); color: var(--ios-color); }
.platform-card.android .icon { background: rgba(34, 197, 94, 0.1); color: var(--android-color); }
.platform-card.pc .icon { background: rgba(249, 115, 22, 0.1); color: var(--pc-color); }

.platform-card:hover .icon {
  transform: scale(1.1) rotate(-5deg);
}

.platform-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.platform-card .desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.platform-card .count {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ---------- Product Cards ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: var(--transition-smooth);
  position: relative;
  backdrop-filter: blur(10px);
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(124, 58, 237, 0.2);
  box-shadow: 0 20px 60px rgba(124, 58, 237, 0.1);
}

.product-card .card-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));
}

.product-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.product-card:hover .card-image img {
  transform: scale(1.05);
}

.product-card .card-image .badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-new { background: rgba(34, 197, 94, 0.2); color: #22c55e; border: 1px solid rgba(34, 197, 94, 0.3); }
.badge-hot { background: rgba(239, 68, 68, 0.2); color: #ef4444; border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-sale { background: rgba(234, 179, 8, 0.2); color: #eab308; border: 1px solid rgba(234, 179, 8, 0.3); }

.product-card .card-body {
  padding: 24px;
}

.product-card .card-platform {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  padding: 4px 10px;
  border-radius: 6px;
}

.card-platform.ios { color: var(--ios-color); background: rgba(14, 165, 233, 0.1); }
.card-platform.android { color: var(--android-color); background: rgba(34, 197, 94, 0.1); }
.card-platform.pc { color: var(--pc-color); background: rgba(249, 115, 22, 0.1); }

.product-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  transition: var(--transition-fast);
}

.product-card:hover h3 {
  color: var(--accent-primary-light);
}

.product-card .card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.product-card .price {
  font-family: 'Inter', sans-serif;
  font-size: 1.35rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-card .price .currency {
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---------- Stats Section ---------- */
.stats-section {
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: rgba(124, 58, 237, 0.02);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item .stat-number {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-item .stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 8px;
  font-weight: 500;
}

/* ---------- Features Section ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 58, 237, 0.2);
  background: var(--bg-card-hover);
}

.feature-card .feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(124, 58, 237, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- Page Header (Category Pages) ---------- */
.page-header {
  padding: 140px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.page-header.ios-header::before { background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.08) 0%, transparent 70%); }
.page-header.android-header::before { background: radial-gradient(ellipse at center, rgba(34, 197, 94, 0.08) 0%, transparent 70%); }
.page-header.pc-header::before { background: radial-gradient(ellipse at center, rgba(249, 115, 22, 0.08) 0%, transparent 70%); }

.page-header .page-icon {
  width: 80px;
  height: 80px;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  margin: 0 auto 24px;
  position: relative;
  z-index: 1;
}

.page-header.ios-header .page-icon { background: rgba(14, 165, 233, 0.1); color: var(--ios-color); }
.page-header.android-header .page-icon { background: rgba(34, 197, 94, 0.1); color: var(--android-color); }
.page-header.pc-header .page-icon { background: rgba(249, 115, 22, 0.1); color: var(--pc-color); }

.page-header h1 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* ---------- Filter Bar ---------- */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  margin-bottom: 40px;
  backdrop-filter: blur(10px);
}

.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 8px 20px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid transparent;
  background: none;
  font-family: 'Outfit', sans-serif;
}

.filter-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.filter-tab.active {
  color: var(--text-primary);
  background: rgba(124, 58, 237, 0.1);
  border-color: rgba(124, 58, 237, 0.2);
}

.filter-search {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  transition: var(--transition-fast);
}

.filter-search:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.filter-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  width: 200px;
}

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

.filter-search .search-icon {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ---------- CTA Section ---------- */
.cta-section {
  padding: 100px 0;
}

.cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 28px;
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
}

.cta-box::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(124, 58, 237, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.cta-box h2 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto 32px;
  position: relative;
  z-index: 1;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ---------- Footer ---------- */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.3);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.footer-brand .footer-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient-btn);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.footer-brand .footer-logo span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer-col h4 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--accent-primary-light);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  font-size: 1.1rem;
}

.footer-social a:hover {
  background: rgba(124, 58, 237, 0.1);
  border-color: rgba(124, 58, 237, 0.3);
  color: var(--accent-primary-light);
  transform: translateY(-2px);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }
.animate-on-scroll:nth-child(6) { transition-delay: 0.5s; }

/* ---------- Card Image Placeholder ---------- */
.card-image-placeholder {
  width: 100%;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
}

.card-image-placeholder.ios-bg { background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(6, 182, 212, 0.08)); }
.card-image-placeholder.android-bg { background: linear-gradient(135deg, rgba(34, 197, 94, 0.15), rgba(22, 163, 74, 0.08)); }
.card-image-placeholder.pc-bg { background: linear-gradient(135deg, rgba(249, 115, 22, 0.15), rgba(234, 88, 12, 0.08)); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .platforms-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
    --card-radius: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(7, 7, 13, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 80px 24px 24px;
    gap: 4px;
    transition: var(--transition-smooth);
    border-left: 1px solid var(--border-color);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    padding: 14px 20px;
    font-size: 1rem;
  }

  .hero { padding: 100px 24px 60px; min-height: auto; }
  .hero h1 { font-size: 2.2rem; }
  .hero-buttons { flex-direction: column; align-items: center; }

  .platforms-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .products-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .filter-bar { flex-direction: column; align-items: stretch; }
  .filter-search input { width: 100%; }
  
  .cta-box { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .platform-card { padding: 32px 20px; }
}

/* ---------- Loading Shimmer ---------- */
.shimmer {
  background: linear-gradient(90deg, 
    var(--bg-card) 25%, 
    rgba(255,255,255,0.05) 50%, 
    var(--bg-card) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

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

/* ---------- Overlay for mobile nav ---------- */
.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  backdrop-filter: blur(4px);
}

.nav-overlay.active {
  display: block;
}

/* ---------- Navbar Auth Styles ---------- */
.nav-auth {
  display: flex;
  align-items: center;
  margin-left: 8px;
}

.nav-login-btn {
  white-space: nowrap;
}

.nav-user-menu {
  position: relative;
}

.nav-user-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--text-primary);
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
}

.nav-user-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(124, 58, 237, 0.3);
}

.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent-gradient-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: white;
  flex-shrink: 0;
}

.nav-username {
  font-weight: 600;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-chevron {
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 260px;
  background: rgba(13, 13, 22, 0.95);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 8px;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition-fast);
  z-index: 1001;
}

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

.nav-dropdown-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
}

.nav-dropdown-avatar {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-gradient-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.nav-dropdown-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.nav-dropdown-email {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  background: none;
  font-family: 'Outfit', sans-serif;
  text-align: left;
}

.nav-dropdown-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.nav-dropdown-logout:hover {
  background: rgba(239, 68, 68, 0.08);
  color: #ef4444;
}

@media (max-width: 768px) {
  .nav-auth {
    margin-left: 0;
    margin-top: 16px;
    padding: 0 4px;
  }
  .nav-username { display: none; }
  .nav-chevron { display: none; }
  .nav-dropdown {
    right: auto;
    left: 0;
    width: 240px;
  }
}