/* ── Reset & Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #1a1a1e;
  --surface:    #242427;
  --surface2:   #2c2c30;
  --border:     #3a3a40;
  --text:       #f0f0f3;
  --text-dim:   #98989d;
  --accent:     #18bcf2;
  --accent-dim: #0d7ea8;
  --amber:      #f5a623;
  --green:      #2ecc71;
  --red:        #e74c3c;
  --code-bg:    #1e1e22;
  --radius:     8px;
  --radius-lg:  14px;
  --font:       -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --font-mono:  "SF Mono", Menlo, Monaco, Consolas, monospace;
}

html { font-size: 17px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ──────────────────────────────────────────────── */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; color: #fff; }
h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; margin-bottom: 1rem; }
h3 { font-size: 1.2rem; }
p { margin-bottom: 1rem; color: var(--text-dim); }

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

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--text);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}
pre code { background: none; padding: 0; }

/* ── Layout ──────────────────────────────────────────────────── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 5rem 0; }
section.alt { background: var(--surface); }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  padding: 6rem 0 4rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.hero-logo {
  display: block;
  margin: 0 auto 1.5rem;
  filter: drop-shadow(0 8px 32px rgba(24, 188, 242, 0.15));
}
.hero h1 { margin-bottom: 0.5rem; }
.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto 1.75rem;
}
.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.hero-badges img { height: 22px; }

.cta-group {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s, transform 0.1s;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #2fc8f8; }
.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--border); }

/* ── Feature Grid ────────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.feature-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.feature-card .icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}
.feature-card h3 { margin-bottom: 0.35rem; }
.feature-card p { font-size: 0.92rem; margin-bottom: 0; }

/* ── Terminal ────────────────────────────────────────────────── */
.terminal {
  background: #0d0d0f;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 2rem 0;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1rem;
  background: #1a1a1e;
  border-bottom: 1px solid var(--border);
}
.terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-dot:nth-child(1) { background: #ff5f57; }
.terminal-dot:nth-child(2) { background: #febc2e; }
.terminal-dot:nth-child(3) { background: #28c840; }
.terminal-title {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.terminal-body {
  padding: 1.2rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.0;
  white-space: pre-wrap;
}
.terminal-body pre {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
.terminal-body .prompt { color: var(--green); }
.terminal-body .cmd { color: #fff; }
.terminal-body .out { color: var(--text-dim); }
.terminal-body .accent { color: var(--accent); }

/* ── Spec Table ──────────────────────────────────────────────── */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}
.spec-table th, .spec-table td {
  padding: 0.7rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.spec-table th {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}
.spec-table td { font-size: 0.95rem; }
.spec-table tr:hover td { background: rgba(255,255,255,0.02); }

/* ── Steps ───────────────────────────────────────────────────── */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin: 2.5rem 0;
  counter-reset: step;
}
.step {
  position: relative;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.5rem 1.5rem 3.2rem;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1.5rem;
  width: 28px;
  height: 28px;
  background: var(--accent-dim);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.step p { font-size: 0.88rem; margin-bottom: 0; }

/* ── Trust Strip ─────────────────────────────────────────────── */
.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  margin: 2rem 0;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.trust-item .check {
  color: var(--green);
  font-weight: 700;
  font-size: 1.1rem;
}

/* ── Doc Page (inner) ────────────────────────────────────────── */
.doc-page {
  max-width: 780px;
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
}
.doc-page h1 { margin-bottom: 2rem; }
.doc-page h2 { margin-top: 2.5rem; }
.doc-page ul, .doc-page ol { margin-bottom: 1rem; padding-left: 1.5rem; }
.doc-page li { margin-bottom: 0.3rem; color: var(--text-dim); }
.doc-page table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}
.doc-page th, .doc-page td {
  padding: 0.55rem 0.8rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.doc-page th { font-size: 0.75rem; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.doc-page td { font-size: 0.9rem; }

.doc-nav {
  margin-bottom: 2.5rem;
  font-size: 0.9rem;
}
.doc-nav a { margin-right: 1.25rem; }

.note, .warning {
  border-left: 3px solid var(--accent);
  background: rgba(24, 188, 242, 0.06);
  padding: 0.8rem 1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}
.warning {
  border-left-color: var(--amber);
  background: rgba(245, 166, 35, 0.06);
}

/* ── Anchor Links ────────────────────────────────────────────── */
/* GitHub-style: a bare link icon, shown only on heading hover
   (or keyboard focus), with no background or box. */
.anchor-link {
  display: inline-flex;
  align-items: center;
  margin-left: 0.35em;
  padding: 0;
  border: none;
  background: none;
  color: var(--text-dim);
  cursor: pointer;
  vertical-align: middle;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s;
}
h2:hover .anchor-link,
h3:hover .anchor-link,
h4:hover .anchor-link,
.anchor-link:focus-visible {
  opacity: 1;
}
.anchor-link:hover {
  color: var(--accent);
}
.anchor-link.copied {
  color: var(--green);
}

/* ── Footer ──────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: 4rem;
}
.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.footer-links a { font-size: 0.88rem; color: var(--text-dim); }
.footer-links a:hover { color: var(--text); }
.footer-credit {
  font-size: 0.78rem;
  color: var(--text-dim);
}
.footer-credit a { color: var(--text-dim); text-decoration: underline; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .hero { padding: 4rem 0 2.5rem; }
  section { padding: 3rem 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}