:root {
  --bg-top: #040c1c;
  --bg-bottom: #0e2444;
  --accent: #4a90d9;
  --accent-light: #8cc8ff;
  --accent-deep: #2e6eb4;
  --text-primary: #ffffff;
  --text-secondary: #a5b9d4;
  --text-muted: #6b829e;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(140, 200, 255, 0.25);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text-primary);
  background: linear-gradient(165deg, var(--bg-top) 0%, var(--bg-bottom) 45%, #0a1a32 100%);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(74, 144, 217, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(74, 144, 217, 0.08), transparent);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #b8dcff;
}

.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(4, 12, 28, 0.72);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
}

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

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero-icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  margin: 0 auto 1.75rem;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.12),
    0 20px 60px rgba(74, 144, 217, 0.35),
    var(--shadow);
  animation: float 6s ease-in-out infinite;
}

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

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .tagline {
  font-size: clamp(1.0625rem, 2.5vw, 1.375rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 0.75rem;
  font-weight: 400;
}

.hero .hero-sub {
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 2rem;
}

.privacy-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.625rem;
  margin-bottom: 2.5rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4375rem 1rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--accent-light);
}

.pill svg {
  width: 14px;
  height: 14px;
  opacity: 0.85;
}

/* Sections */
section {
  padding: 3.5rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.section-desc {
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
}

.feature-card:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(74, 144, 217, 0.15);
  margin-bottom: 1.125rem;
  color: var(--accent-light);
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Support block */
.support-block {
  background: linear-gradient(135deg, rgba(74, 144, 217, 0.12) 0%, rgba(74, 144, 217, 0.04) 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
}

.support-block h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.support-block p {
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(74, 144, 217, 0.4);
}

.btn:hover {
  background: var(--accent-deep);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(74, 144, 217, 0.5);
}

.btn-secondary {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: none;
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  box-shadow: none;
  color: var(--text-primary);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Privacy page */
.page-hero {
  padding: 3.5rem 0 2rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.page-hero .updated {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.prose {
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 4rem;
}

.prose h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose p,
.prose li {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.prose p {
  margin-bottom: 1rem;
}

.prose ul {
  margin: 0 0 1rem 1.25rem;
}

.prose li {
  margin-bottom: 0.375rem;
}

.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

.highlight-box {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.highlight-box p:last-child {
  margin-bottom: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

/* Responsive */
@media (max-width: 640px) {
  .nav-links {
    gap: 1rem;
  }

  .hero {
    padding: 3.5rem 0 3rem;
  }

  .support-block {
    padding: 1.75rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}