:root {
  --bg: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --text: #e8e8f0;
  --text-secondary: #a0a0b8;
  --muted: #6a6a80;
  --primary: #00f5d4;
  --primary-hover: #00c9a0;
  --primary-glow: rgba(0, 245, 212, 0.15);
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #eab308;
  --border: #2a2a3e;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.light {
  --bg: #f8f9fa;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f0f5;
  --text: #1a1a2e;
  --text-secondary: #4a4a60;
  --muted: #8a8aa0;
  --border: #e0e0ea;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; height: auto; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-title { font-size: clamp(1.8rem, 4vw, 2.5rem); text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 48px; }
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, #00b4d8 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: all 0.25s; border: 2px solid transparent; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #0f0f1a; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #0f0f1a; box-shadow: 0 0 30px var(--primary-glow); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #0f0f1a; }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }
.btn-sm { padding: 8px 20px; font-size: 0.9rem; }
.btn-block { width: 100%; }

.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(15,15,26,0.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.light .navbar { background: rgba(255,255,255,0.85); }
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.2rem; }
.logo:hover { color: var(--text); }
.logo-icon { color: var(--primary); flex-shrink: 0; }
.nav-menu { display: flex; align-items: center; gap: 24px; }
.nav-menu a:not(.btn) { color: var(--text-secondary); font-weight: 500; font-size: 0.95rem; transition: color 0.2s; }
.nav-menu a:not(.btn):hover { color: var(--text); }
.burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.burger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }
.burger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.hero { position: relative; padding: 160px 0 100px; text-align: center; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,245,212,0.08) 0%, transparent 60%);
}
.hero .container { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px;
  border-radius: 50px; border: 1px solid var(--border); font-size: 0.85rem;
  color: var(--text-secondary); margin-bottom: 24px;
}
.badge-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); display: inline-block; }
.hero-title { font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 800; line-height: 1.15; margin-bottom: 20px; }
.hero-subtitle { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text-secondary); max-width: 640px; margin: 0 auto 36px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats { display: flex; gap: 48px; justify-content: center; flex-wrap: wrap; }
.stat-item { display: flex; flex-direction: column; gap: 4px; }
.stat-number { font-size: 1.8rem; font-weight: 800; color: var(--text); }
.stat-label { font-size: 0.9rem; color: var(--muted); }

.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; transition: all 0.3s;
}
.feature-card:hover { background: var(--bg-card-hover); transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-icon { width: 48px; height: 48px; border-radius: 12px; background: var(--primary-glow); color: var(--primary); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

.locations-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; }
.location-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; text-align: center; transition: all 0.3s;
}
.location-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.location-flag { font-size: 3rem; margin-bottom: 12px; }
.location-card h3 { margin-bottom: 4px; }
.location-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 12px; }
.location-ping { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: 0.85rem; color: var(--text-secondary); }
.ping-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); display: inline-block; }

.tariffs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; max-width: 1000px; margin: 0 auto; }
.tariff-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px 28px; text-align: center; position: relative; transition: all 0.3s; display: flex; flex-direction: column;
}
.tariff-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.tariff-card--popular { border-color: var(--primary); box-shadow: 0 0 30px var(--primary-glow); }
.tariff-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #0f0f1a; padding: 4px 20px; border-radius: 50px;
  font-size: 0.8rem; font-weight: 700;
}
.tariff-header { margin-bottom: 24px; }
.tariff-header h3 { font-size: 1.3rem; margin-bottom: 8px; }
.tariff-price { font-size: 2.5rem; font-weight: 800; }
.price-value { color: var(--text); }
.tariff-old-price { color: var(--muted); text-decoration: line-through; font-size: 0.9rem; margin-top: 4px; }
.tariff-period { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }
.tariff-features { list-style: none; margin-bottom: 28px; flex: 1; }
.tariff-features li { padding: 8px 0; border-bottom: 1px solid var(--border); color: var(--text-secondary); font-size: 0.9rem; }
.tariff-features li:last-child { border-bottom: none; }
.tariff-features li::before { content: '✓ '; color: var(--primary); font-weight: 700; }

.cta { text-align: center; padding: 100px 0; }
.cta-title { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-bottom: 16px; }
.cta-text { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 36px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.devices-grid { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.device-card {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; min-width: 100px; transition: all 0.3s;
}
.device-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.device-card svg { width: 36px; height: 36px; color: var(--primary); }
.device-card span { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); }

.footer {
  margin-top: auto; border-top: 1px solid var(--border); background: var(--bg-card);
}
.footer-container { display: grid; grid-template-columns: 1fr 2fr; gap: 48px; padding: 60px 20px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; margin-bottom: 16px; max-width: 300px; }
.footer-social a { color: var(--text-secondary); transition: color 0.2s; }
.footer-social a:hover { color: var(--primary); }
.footer-social svg { width: 24px; height: 24px; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-column h4 { font-size: 0.9rem; color: var(--text); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }
.footer-column a { display: block; color: var(--text-secondary); font-size: 0.85rem; padding: 4px 0; transition: color 0.2s; }
.footer-column a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 0; text-align: center; color: var(--muted); font-size: 0.85rem; }

.error-code { font-size: clamp(6rem, 15vw, 12rem); font-weight: 900; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; margin-bottom: 8px; }
.error-text { font-size: clamp(1.2rem, 3vw, 1.8rem); margin-bottom: 8px; }
.error-desc { color: var(--text-secondary); margin-bottom: 24px; }

@media (max-width: 768px) {
  .burger { display: flex; }
  .nav-menu { display: none; position: fixed; top: 64px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); flex-direction: column; padding: 20px; gap: 16px; }
  .nav-menu.open { display: flex; }
  .footer-container { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .hero { padding: 120px 0 60px; }
  .hero-stats { gap: 24px; }
  .section { padding: 48px 0; }
}

.theme-toggle { background: none; border: 1px solid var(--border); border-radius: 50%; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--text-secondary); }