:root {
  --bg: #0A0A0D;
  --surface: #121218;
  --card: #1A1A21;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.14);
  --accent: #7D8CFF;
  --accent-soft: rgba(125, 140, 255, 0.1);
  --accent-glow: rgba(125, 140, 255, 0.25);
  --text: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(255, 255, 255, 0.56);
  --text-tertiary: rgba(255, 255, 255, 0.36);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
}

/* ---- Reset ---- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  text-decoration: underline;
}

img,
svg {
  display: block;
  max-width: 100%;
}

/* ---- Layout ---- */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Accessibility ---- */

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  z-index: 200;
  font-size: 0.875rem;
}

.skip-link:focus {
  top: 16px;
}

/* ---- Navigation ---- */

body > nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 13, 0.8);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  font-size: 1.125rem;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.logo:hover {
  text-decoration: none;
}

.logo svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  padding: 14px 28px;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
  background: #8E9DFF;
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-1px);
}

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

.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 10px 20px;
  border: 1px solid rgba(125, 140, 255, 0.3);
}

.btn-ghost:hover {
  background: var(--accent-soft);
  border-color: rgba(125, 140, 255, 0.5);
}

.btn-sm {
  font-size: 0.875rem;
  padding: 8px 16px;
}

.btn-lg {
  font-size: 1rem;
  padding: 16px 32px;
}

/* ---- Hero ---- */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 64px;
}

.hero-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  width: 800px;
  height: 600px;
  transform: translateX(-50%);
  background: radial-gradient(
    ellipse,
    var(--accent-glow) 0%,
    transparent 70%
  );
  opacity: 0.3;
  animation: glow-pulse 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.2;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.35;
    transform: translateX(-50%) scale(1.05);
  }
}

.hero h1 {
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
  animation: fade-up 0.8s ease-out;
}

.hero-sub {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.65;
  margin-bottom: 40px;
  animation: fade-up 0.8s ease-out 0.1s both;
}

.hero-cta {
  animation: fade-up 0.8s ease-out 0.2s both;
}

.hero-note {
  margin-top: 16px;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Features ---- */

.features {
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  color: var(--accent);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}

/* ---- Footer ---- */

footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.footer-brand svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

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

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

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* ---- Prose (Privacy page) ---- */

.prose {
  padding: 120px 0 80px;
}

.prose .container {
  max-width: 720px;
}

.prose h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.prose .last-updated {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 48px;
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: 48px;
  margin-bottom: 16px;
}

.prose h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
}

.prose p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.prose ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 16px;
}

.prose li {
  position: relative;
  padding-left: 24px;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
}

.prose strong {
  color: var(--text);
  font-weight: 500;
}

/* ---- Responsive ---- */

@media (max-width: 840px) {
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .features {
    padding: 80px 0;
  }

  .prose {
    padding: 100px 0 60px;
  }
}

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 20px;
  }

  .nav-inner {
    height: 56px;
  }

  .hero {
    padding-top: 56px;
  }

  .btn-primary {
    padding: 12px 24px;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 0.9375rem;
  }

  .prose h1 {
    font-size: 2rem;
  }
}