:root {
  --primary: #0A1628;
  --accent: #D4A340;
  --accent-light: #F5D678;
  --text: #FFFFFF;
  --text-dim: #A1A1AA;
  --bg: #030712;
  --card-bg: rgba(24, 24, 27, 0.4);
  --border: rgba(255, 255, 255, 0.08);
  --glow: rgba(212, 163, 64, 0.1);
  --radius: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Background Effects */
.glow-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 15% 15%, var(--glow) 0%, transparent 40%),
              radial-gradient(circle at 85% 85%, var(--glow) 0%, transparent 40%);
  pointer-events: none;
  z-index: -1;
}

/* Header & Nav */
header {
  height: 90px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  backdrop-filter: blur(12px);
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
}

.logo-box {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.logo-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.nav-right {
  display: flex;
  align-items: center;
}

.lang-switcher {
  display: flex;
  gap: 8px;
  margin-right: 30px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 20px;
  border: 1px solid var(--border);
}

.lang-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 11px;
  font-weight: 800;
  padding: 4px 8px;
  border-radius: 12px;
  transition: var(--transition);
}

.lang-link:hover {
  color: var(--text);
}

.lang-link.active {
  background: var(--accent);
  color: #000;
}

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  margin-right: 24px;
  font-size: 15px;
}

.nav-link:hover {
  color: var(--accent);
}

.cta-btn {
  background: linear-gradient(135deg, var(--accent), #b88a32);
  color: #000;
  padding: 14px 28px;
  border-radius: 40px;
  font-weight: 800;
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  box-shadow: 0 4px 20px rgba(212, 163, 64, 0.3);
}

.cta-btn.sm {
  padding: 8px 18px;
  font-size: 14px;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 163, 64, 0.4);
}

/* Hero Section */
.hero {
  padding: 100px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.badge {
  background: rgba(212, 163, 64, 0.15);
  color: var(--accent-light);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
  width: fit-content;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 64px;
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -2px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 20px;
  color: var(--text-dim);
  margin-bottom: 40px;
}

.download-group {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.store-badge {
  height: 48px;
  transition: var(--transition);
}

.store-badge img {
  height: 100%;
}

.store-badge:hover {
  transform: translateY(-4px);
  filter: brightness(1.2);
}

/* Hero Visual & Mockup */
.hero-visual {
  flex: 1;
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-mockup {
    width: 320px;
    height: 640px;
    background: #1C1C1E;
    border: 12px solid #2C2C2E;
    border-radius: 48px;
    position: relative;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    z-index: 2;
    overflow: hidden;
}

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

.floating-card {
  position: absolute;
  padding: 16px 20px;
  background: rgba(30,30,30, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  z-index: 10;
  animation: floating 4s ease-in-out infinite;
}

.floating-card i {
  font-size: 28px;
}

.price-tag {
  top: 15%;
  right: -40px;
  color: var(--accent);
}

.ddv-status {
  bottom: 20%;
  left: -80px;
  color: #34C759;
  animation-delay: 2s;
}

.price-tag .label, .ddv-status .label { color: var(--text-dim); font-size: 12px; display: block; }
.price-tag .value, .ddv-status .value { font-weight: 800; font-size: 18px; }

@keyframes floating {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

/* Features Section */
.features-section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -1px;
}

.section-title p {
  color: var(--text-dim);
  font-size: 18px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.feature-card:hover {
  background: rgba(255,b,b, 0.05);
  border-color: var(--accent);
  transform: translateY(-5px);
}

.icon-box {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  background: rgba(255,255,255,0.05);
}

.icon-box.red i { color: #FF3B30; }
.icon-box.gold i { color: var(--accent); }
.icon-box.blue i { color: #007AFF; }
.icon-box.green i { color: #34C759; }

.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--text-dim); font-size: 15px; }

/* Download Banner */
.download-banner {
  padding: 60px 0;
  margin-bottom: 80px;
}

.banner-content {
  background: linear-gradient(135deg, #1C1C1E 0%, #0A1628 100%);
  padding: 80px 40px;
  border-radius: 40px;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.banner-content::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, var(--glow) 0%, transparent 60%);
    z-index: 0;
}

.banner-content h2, .banner-content p, .banner-content .download-group { position: relative; z-index: 1; }

.banner-content h2 { font-size: 48px; font-weight: 800; margin-bottom: 16px; letter-spacing: -1.5px; }
.banner-content p { font-size: 20px; color: var(--text-dim); margin-bottom: 40px; }
.download-group.central { justify-content: center; }

/* Footer */
footer {
  background: rgba(10, 22, 40, 0.3);
  padding: 80px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 60px;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-info .logo.sm img { width: 28px; height: 28px;}
.footer-info .logo.sm span { font-size: 18px; }
.footer-info p { margin-top: 10px; color: var(--text-dim); font-size: 14px; }

.footer-links { display: flex; gap: 30px; }
.footer-links a { color: var(--text-dim); text-decoration: none; font-size: 14px; transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }

.footer-bottom { text-align: center; padding-top: 40px; border-top: 1px solid var(--border); color: var(--text-dim); font-size: 13px; }

/* Mobile & Tablet Optimizations */
@media (max-width: 992px) {
  header { height: 75px; }
  .logo span { font-size: 18px; }
  .nav-link { display: none; } /* Hide text links to save space */
  .lang-switcher { margin-right: 15px; }
  
  .hero { flex-direction: column; text-align: center; padding: 60px 0; gap: 40px; }
  .hero-content { max-width: 100%; }
  .hero h1 { font-size: clamp(32px, 8vw, 52px); margin-bottom: 20px; }
  .hero p { font-size: 18px; margin-bottom: 30px; }
  .hero-visual { order: -1; margin-bottom: 30px; width: 100%; max-width: 320px; margin-left: auto; margin-right: auto; }
  .phone-mockup { width: 240px; height: 480px; border-width: 8px; }
  
  .floating-card { padding: 12px 14px; border-radius: 14px; gap: 10px; }
  .floating-card i { font-size: 20px; }
  .price-tag { top: 10%; right: -20px; }
  .ddv-status { bottom: 15%; left: -30px; }
  .price-tag .value, .ddv-status .value { font-size: 14px; }
  
  .section-title h2 { font-size: 32px; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  header { height: 65px; }
  .logo-box { width: 36px; height: 36px; }
  .cta-btn.sm { padding: 6px 12px; font-size: 12px; }
  
  .hero { padding: 40px 0; }
  .hero h1 { font-size: 30px; letter-spacing: -1px; }
  .download-group { gap: 12px; }
  .store-badge { height: 40px; }
  
  .features-grid { grid-template-columns: 1fr; gap: 20px; }
  .feature-card { padding: 20px; }
  
  .banner-content { padding: 40px 20px; border-radius: 24px; }
  .banner-content h2 { font-size: 28px; }
  .banner-content p { font-size: 16px; margin-bottom: 30px; }
  
  .footer-content { flex-direction: column; text-align: center; gap: 30px; }
  .footer-links { flex-direction: column; gap: 15px; }
}