@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;600&display=swap");

:root {
  color-scheme: light dark;
  --bg: #0a0f1c;
  --panel: rgba(14, 20, 33, 0.7);
  --panel-strong: rgba(17, 26, 45, 0.9);
  --text: #e9edf5;
  --muted: #a8b2c7;
  --accent: #5cf4ff;
  --accent-2: #9ef2c8;
  --accent-3: #5f7cff;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --glow: 0 0 0 1px rgba(92, 244, 255, 0.15), 0 10px 40px rgba(92, 244, 255, 0.2);
  --code-bg: rgba(255, 255, 255, 0.04);
  --focus: #5cf4ff;
  --success: #8cf5ae;
  --font-sans: "Space Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --max-width: 1180px;
  --gutter: clamp(1.2rem, 2vw + 0.6rem, 2.2rem);
  --radius: 18px;
  background-color: var(--bg);
}

html {
  scroll-behavior: smooth;
}

[data-theme="light"] {
  --bg: #f3f6fc;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: rgba(255, 255, 255, 0.95);
  --text: #0b1220;
  --muted: #4a5568;
  --accent: #0066ff;
  --accent-2: #00a676;
  --accent-3: #7b4bff;
  --border: rgba(12, 23, 55, 0.14);
  --shadow: 0 15px 50px rgba(7, 22, 63, 0.15);
  --glow: 0 0 0 1px rgba(0, 102, 255, 0.12), 0 10px 35px rgba(0, 102, 255, 0.2);
  --code-bg: rgba(12, 23, 55, 0.05);
  --focus: #0f62fe;
}

@media (prefers-color-scheme: light) {
  body[data-theme="auto"] {
    --bg: #f3f6fc;
    --panel: rgba(255, 255, 255, 0.82);
    --panel-strong: rgba(255, 255, 255, 0.95);
    --text: #0b1220;
    --muted: #4a5568;
    --accent: #0066ff;
    --accent-2: #00a676;
    --accent-3: #7b4bff;
    --border: rgba(12, 23, 55, 0.14);
    --shadow: 0 15px 50px rgba(7, 22, 63, 0.15);
    --glow: 0 0 0 1px rgba(0, 102, 255, 0.12), 0 10px 35px rgba(0, 102, 255, 0.2);
    --code-bg: rgba(12, 23, 55, 0.05);
    --focus: #0f62fe;
  }
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: radial-gradient(circle at 15% 20%, rgba(92, 244, 255, 0.12), transparent 35%),
    radial-gradient(circle at 75% 10%, rgba(94, 124, 255, 0.18), transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(158, 242, 200, 0.18), transparent 35%),
    var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}

main {
  max-width: var(--max-width);
  padding: 0 var(--gutter) 4rem;
  margin: 0 auto;
}

section {
  scroll-margin-top: 90px;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 8px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem var(--gutter);
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1.1rem;
}

.tagline {
  font-size: 0.9rem;
  color: var(--muted);
}

nav {
  justify-self: center;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 1.2rem;
  padding: 0;
  margin: 0;
}

.nav-list a {
  padding: 0.35rem 0.55rem;
  border-radius: 10px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background: var(--panel);
}

.nav-list a.active {
  background: linear-gradient(120deg, rgba(92, 244, 255, 0.18), rgba(94, 124, 255, 0.18));
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  padding: 0.5rem;
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--text);
  margin: 0.25rem 0;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 0.55rem 0.75rem;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow);
}

.theme-icon {
  font-size: 0.95rem;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 2.5rem var(--gutter) 2rem;
  margin: 0 calc(-1 * var(--gutter));
  background: linear-gradient(135deg, rgba(92, 244, 255, 0.08), rgba(94, 124, 255, 0.06), rgba(158, 242, 200, 0.05));
  border-bottom: 1px solid var(--border);
}

.hero-content h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.2rem);
  line-height: 1.1;
  margin: 0.2rem 0 1rem;
}

.hero .eyebrow {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}

.lede {
  font-size: clamp(1.05rem, 1.2vw + 0.9rem, 1.25rem);
  color: var(--muted);
  max-width: 720px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.2rem 0 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.05rem;
  border-radius: 14px;
  font-weight: 600;
  border: 1px solid var(--border);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #05080f;
  border: none;
  box-shadow: var(--glow);
}

.btn.primary:hover {
  transform: translateY(-1px);
}

.btn.ghost {
  background: var(--panel);
  color: var(--text);
}

.btn.ghost:hover {
  background: var(--panel-strong);
  transform: translateY(-1px);
}

.trust-line {
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 0.6rem;
}

.hero-visual {
  position: relative;
  min-height: 260px;
  display: grid;
  place-items: center;
}

.hero-visual img {
  width: 100%;
  max-width: 420px;
  filter: drop-shadow(0 15px 40px rgba(0, 0, 0, 0.35));
}

.orbital {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: var(--glow);
  animation: float 10s ease-in-out infinite;
}

.dot-a { top: 12%; left: 24%; animation-delay: 0.4s; }
.dot-b { top: 70%; left: 80%; animation-delay: 1.2s; background: var(--accent-2); }
.dot-c { top: 30%; left: 65%; animation-delay: 0.8s; background: var(--accent-3); }

@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(6px, -8px, 0); }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}

.panel .section-header h2 {
  font-size: clamp(1.6rem, 1.8vw + 1rem, 2.2rem);
  margin: 0 0 0.35rem;
}

.section-header p {
  margin: 0.35rem 0;
  color: var(--muted);
  max-width: 840px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.2rem;
}

.card {
  padding: 1.2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(92, 244, 255, 0.08), rgba(94, 124, 255, 0.05));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover::after {
  opacity: 1;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.fact {
  border-image: linear-gradient(135deg, var(--accent), var(--accent-2)) 1;
}

.feature-table {
  margin-top: 1rem;
  display: grid;
  gap: 0.6rem;
}

.feature-row {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 0.8rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-strong);
}

.feature-name {
  font-weight: 600;
}

.feature-why {
  color: var(--muted);
}

.code-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.code-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--panel-strong);
}

.code-card figcaption {
  font-weight: 600;
  margin-bottom: 0.6rem;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  margin: 0 0 0.8rem;
}

code {
  font-family: var(--font-mono);
}

.code-caption {
  margin: 0 0 2.2rem;
  color: var(--muted);
}

.copy-btn {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.copy-btn:hover {
  box-shadow: var(--glow);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  transform: translate(-50%, 20px);
  opacity: 0;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow);
  color: var(--text);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.tile {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--panel-strong);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--panel-strong);
}

.disclaimer {
  color: var(--muted);
  font-size: 0.95rem;
}

.final-cta {
  text-align: center;
  background: linear-gradient(145deg, rgba(92, 244, 255, 0.12), rgba(94, 124, 255, 0.1));
}

.site-footer {
  max-width: var(--max-width);
  margin: 2rem auto 3rem;
  padding: 1.5rem var(--gutter);
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  color: var(--muted);
}

.ledger ul {
  padding-left: 1rem;
  margin: 0.5rem 0 0;
}

.ledger li + li {
  margin-top: 0.35rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 960px) {
  .site-header {
    grid-template-columns: 1fr auto auto;
    align-items: center;
  }

  nav {
    justify-self: end;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-list {
    position: absolute;
    top: 100%;
    right: var(--gutter);
    background: var(--panel-strong);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 0.6rem;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 180px;
    box-shadow: var(--shadow);
    display: none;
  }

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

  .feature-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  main {
    padding: 0 var(--gutter) 3rem;
  }

  .site-header {
    position: sticky;
  }

  .hero {
    margin: 0;
    border-radius: 0 0 var(--radius) var(--radius);
  }

  .site-footer {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}