/* ── Theme tokens ── */

[data-theme="dark"] {
  --bg: #050505;
  --bg-raised: #0c0c0b;
  --bg-code: rgba(255, 255, 255, 0.05);
  --text: #f5f5ef;
  --text-muted: #9e9e97;
  --border: #222220;
  --accent: #ff5a36;
  --accent-hover: #ff7a5c;
  --grad-a: rgba(255, 90, 54, 0.15);
  --grad-b: rgba(255, 255, 255, 0.04);
  --noise-alpha: 0.03;
  --noise-opacity: 0.25;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f5f5f0;
  --bg-raised: #ffffff;
  --bg-code: rgba(0, 0, 0, 0.045);
  --text: #1a1a18;
  --text-muted: #6e6e66;
  --border: #d8d8d2;
  --accent: #d63a1a;
  --accent-hover: #b83015;
  --grad-a: rgba(255, 90, 54, 0.06);
  --grad-b: rgba(0, 0, 0, 0.015);
  --noise-alpha: 0.015;
  --noise-opacity: 0.12;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  color-scheme: light;
}

/* ── Reset ── */

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

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Space Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.7;
  background:
    radial-gradient(circle at 80% 0%, var(--grad-a), transparent 40%),
    radial-gradient(circle at 20% 100%, var(--grad-b), transparent 45%),
    var(--bg);
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(128, 128, 128, var(--noise-alpha)) 1px, transparent 1px),
    linear-gradient(90deg, rgba(128, 128, 128, var(--noise-alpha)) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: var(--noise-opacity);
}

/* ── Layout ── */

header, main, footer { position: relative; z-index: 1; }

header {
  border-bottom: 1px solid var(--border);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 980px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
}

.brand {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  transition: color 150ms;
}

.nav-link:hover { color: var(--accent); }

#theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 150ms, color 150ms;
}

#theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

[data-theme="dark"] .icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: none; }

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--border);
}

h1, h2, h3 { margin: 0; }

h2 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  margin-bottom: 1.8rem;
}

/* ── Hero ── */

.hero {
  padding: 5rem 0 4rem;
}

.hero h1 {
  font-family: "Space Mono", monospace;
  font-weight: 700;
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
}

.dot { color: var(--accent); }

.tagline {
  font-size: 1rem;
  color: var(--text);
  margin: 0 0 0.5rem;
  font-weight: 700;
}

.tagline-sub {
  color: var(--text-muted);
  margin: 0 0 2rem;
  max-width: 52ch;
}

.hero-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  font-family: "Space Mono", monospace;
  font-size: 0.82rem;
  text-decoration: none;
  border: 1px solid var(--border);
  transition: border-color 150ms, color 150ms, background 150ms, transform 150ms;
}

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

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Features ── */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.feature {
  border: 1px solid var(--border);
  padding: 1.2rem;
  background: var(--bg-raised);
}

.feature-num {
  font-size: 0.72rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
  letter-spacing: 0.08em;
}

.feature h3 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.65;
}

.chains {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.chain-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.chain-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.chain {
  font-size: 0.78rem;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ── Quick start steps ── */

.step {
  margin-bottom: 1.5rem;
}

.step:last-child { margin-bottom: 0; }

.step-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.step-num {
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  padding-top: 0.15rem;
  flex-shrink: 0;
}

.step-head h3 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.step-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.code-block {
  position: relative;
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border);
  background: var(--bg-raised);
}

.code-block pre {
  flex: 1;
  margin: 0;
  padding: 0.8rem 1rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.6;
}

.code-block code {
  font-family: "Space Mono", monospace;
  color: var(--text);
}

.copy-btn {
  flex-shrink: 0;
  padding: 0 1rem;
  border: none;
  border-left: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-family: "Space Mono", monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 150ms, background 150ms;
}

.copy-btn:hover {
  color: var(--accent);
  background: var(--bg-code);
}

.copy-btn.copied {
  color: var(--accent);
}

/* ── Terminal demo ── */

.terminal-card {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  overflow: hidden;
}

.terminal-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--border);
}

.terminal-dots {
  display: flex;
  gap: 0.35rem;
}

.terminal-dots span {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
}

.terminal-dots span:nth-child(1) { background: #ff5f57; }
.terminal-dots span:nth-child(2) { background: #febc2e; }
.terminal-dots span:nth-child(3) { background: #28c840; }

.terminal-head p {
  margin: 0 0 0 0.5rem;
  color: var(--text-muted);
  font-size: 0.78rem;
}

#terminal {
  margin: 0;
  min-height: 340px;
  max-height: 400px;
  overflow-y: auto;
  padding: 1rem;
  line-height: 1.55;
  font-size: 0.82rem;
}

.cmd { color: var(--text); }
.out { color: var(--text-muted); }

.caret {
  color: var(--accent);
  animation: blink 850ms steps(1, end) infinite;
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

/* ── Footer ── */

footer {
  border-top: none;
  padding: 2rem 0 3rem;
}

section:last-of-type { border-bottom: none; }

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

.footer-brand {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.2rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.78rem;
  transition: color 150ms;
}

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

/* ── Responsive ── */

@media (max-width: 720px) {
  .hero { padding: 3rem 0 2.5rem; }

  .features {
    grid-template-columns: 1fr;
  }

  #terminal { min-height: 300px; }
}