:root {
  --bg-primary: #0f0c29;
  --bg-secondary: #302b63;
  --bg-tertiary: #24243e;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.10);
  --surface-border: rgba(255, 255, 255, 0.08);
  --primary: #a78bfa;
  --primary-dark: #7c5cfc;
  --secondary: #60a5fa;
  --accent: #34d399;
  --text-primary: #e0e0ff;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--primary);
}

img {
  max-width: 100%;
  height: auto;
}

/* ─── Navbar ─── */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(15, 12, 41, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
}

.navbar-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--surface);
  color: var(--primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

/* ─── Container ─── */

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Hero ─── */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: linear-gradient(160deg, var(--bg-primary) 0%, var(--bg-secondary) 40%, #1e1b4b 70%, var(--bg-primary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(167, 139, 250, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(96, 165, 250, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-icon {
  width: 96px;
  height: 96px;
  border-radius: 24px;
  margin-bottom: 24px;
  box-shadow: 0 8px 40px rgba(167, 139, 250, 0.3);
}

.hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(16px, 2.5vw, 20px);
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  border: none;
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(167, 139, 250, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 28px rgba(167, 139, 250, 0.5);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--surface-border);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--surface-border);
}

.btn-outline:hover {
  background: var(--surface);
  color: var(--text-primary);
}

/* ─── Sections ─── */

.section {
  padding: 80px 0;
}

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

.section-header h2 {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 540px;
  margin: 0 auto;
}

/* ─── About Section ─── */

.about-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.about-content p {
  color: var(--text-secondary);
  font-size: 17px;
  margin-bottom: 16px;
}

/* ─── Features Grid ─── */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  background: var(--surface-hover);
  box-shadow: var(--shadow);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
  display: block;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── Privacy Section ─── */

.privacy-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.privacy-content p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 16px;
}

.privacy-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 32px;
}

.privacy-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 100px;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

.privacy-badge .icon {
  font-size: 18px;
}

/* ─── Support Section ─── */

.support-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.support-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.support-card p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 15px;
}

.support-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(167, 139, 250, 0.08);
  border: 1px solid rgba(167, 139, 250, 0.2);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition);
}

.support-email:hover {
  background: rgba(167, 139, 250, 0.15);
  color: var(--primary);
}

/* ─── Footer ─── */

.footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--surface-border);
  color: var(--text-muted);
  font-size: 13px;
}

.footer a {
  color: var(--text-muted);
}

.footer a:hover {
  color: var(--primary);
}

/* ─── Card (for privacy policy page) ─── */

.page-card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 48px 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--surface-border);
  margin-top: 100px;
  margin-bottom: 40px;
}

.page-card h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-card .subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 32px;
}

.page-card .last-updated {
  display: inline-block;
  background: rgba(167, 139, 250, 0.15);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  margin-bottom: 32px;
}

.page-card h2 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--primary);
}

.page-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 8px;
  color: #c4b5fd;
}

.page-card p {
  margin-bottom: 14px;
  color: var(--text-secondary);
}

.page-card ul {
  margin-bottom: 14px;
  padding-left: 20px;
}

.page-card li {
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.page-card hr {
  border: none;
  border-top: 1px solid var(--surface-border);
  margin: 32px 0;
}

.page-card .badge {
  display: inline-block;
  background: rgba(96, 165, 250, 0.12);
  color: var(--secondary);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  margin-right: 6px;
}

.page-card .footer-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

.page-card .contact-block {
  background: rgba(167, 139, 250, 0.08);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-top: 8px;
}

/* ─── Page wrapper ─── */

.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-wrapper .container-narrow {
  flex: 1;
}

/* ─── Scroll indicator ─── */

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 12px;
  animation: float 2s ease-in-out infinite;
}

.scroll-indicator .arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ─── Responsive ─── */

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    flex-direction: column;
    justify-content: flex-start;
    padding: 80px 24px 24px;
    gap: 4px;
    background: rgba(15, 12, 41, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: right var(--transition);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.4);
  }

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

  .nav-links a {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
  }

  .hero-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
  }

  .hero {
    padding: 100px 20px 60px;
  }

  .section {
    padding: 56px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .feature-card {
    padding: 20px 16px;
  }

  .feature-icon {
    font-size: 28px;
  }

  .support-card,
  .page-card {
    padding: 32px 20px;
  }

  .page-card h1 {
    font-size: 24px;
  }

  .privacy-badge {
    font-size: 13px;
    padding: 8px 16px;
  }

  .btn {
    padding: 12px 22px;
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 260px;
    justify-content: center;
  }

  .navbar {
    padding: 12px 16px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}