:root {
  --primary: #ff6b00;
  --secondary: #ff2d55;
  --bg-dark: #0f172a;
  --bg-light: #1e293b;
  --text-light: rgba(255, 255, 255, 0.95);
  --text-muted: rgba(255, 255, 255, 0.7);
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-hover: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-light));
  color: var(--text-light);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 20px;
}

.nav {
  display: flex;
  gap: 24px;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 6px;
  transition: background 0.3s ease;
}

.nav a:hover {
  background: var(--card-hover);
  color: var(--text-light);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: #fff;
  cursor: pointer;
}

/* Hero */
.hero {
  background: radial-gradient(circle at top left, var(--primary) 0%, transparent 70%);
  text-align: center;
  padding: 100px 20px;
  animation: fadeInUp 1s ease-out;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  font-size: 16px;
  transition: 0.3s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 107, 0, 0.4);
}

.btn-primary:hover {
  transform: scale(1.05);
}

/* Sections */
section {
  padding: 80px 0;
  animation: fadeInUp 0.8s ease-out;
}

section h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 24px;
}

section p {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

ul {
  list-style: none;
  padding-left: 0;
}

ul li {
  background: var(--card-bg);
  padding: 16px;
  margin-bottom: 12px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
}

ul li:hover {
  transform: translateY(-4px);
}

/* FAQ */
.faq ul li {
  margin-bottom: 16px;
}

/* Footer */
.footer {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  padding: 48px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-links a {
  display: block;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-decoration: none;
}

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

.footer-bottom {
  text-align: center;
  margin-top: 32px;
  font-size: 14px;
  color: var(--text-muted);
}

.download-info {
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  padding: 32px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
}

.download-info .version {
  font-size: 1.1rem;
  margin-bottom: 24px;
  color: var(--text-light);
}

.download-steps {
  list-style: none;
  padding-left: 0;
  margin-bottom: 24px;
}

.download-steps li {
  margin-bottom: 12px;
  font-size: 1rem;
  color: var(--text-muted);
}

.download-steps a {
  color: var(--primary);
  text-decoration: underline;
}

.download-info .btn-primary {
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(255, 107, 0, 0.4);
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    display: none;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.9);
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    padding: 20px;
  }

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

  .mobile-menu-btn {
    display: block;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  section h2 {
    font-size: 1.75rem;
  }
}

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