/* ============================================================
   San — editorial-terminal design system
   Type:  Newsreader (display / italic editorial)  ·
          IBM Plex Mono (terminal voice: nav, code, data, labels) ·
          Spline Sans (body)  — three families for 三.
   Theme: warm parchment + deep teal, noise + radial glow,
          terminal panels with traffic-light dots & a live cursor.
   Shared by index.html, getting-started.html, docs.html.
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600;1,400&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400;1,6..72,500&family=Spline+Sans:wght@400;500;600;700&display=swap");

:root {
  /* warm parchment surfaces — aligned 1:1 with intro.html's light theme
     so the page and the embedded intro are the same material. */
  --bg:        #f5f3ee;
  --bg-soft:   #f1efe9;
  --bg-warm:   #ece9e1;
  --card:      #fffefb;
  --card-2:    #f8f6f1;

  /* ink */
  --text:      #15181d;
  --muted:     #586069;
  --faint:     #a09c91;

  /* warm hairlines */
  --border:    #e4e0d6;
  --border-2:  #d7d2c4;

  /* teal accent family — matches intro.html exactly */
  --accent:    #0d9488;   /* deep teal — primary */
  --accent-2:  #0b7d72;   /* darker teal — text on light */
  --accent-br: #14b8a6;   /* bright teal */
  --mint:      #2dd4bf;
  --accent-soft: rgba(13,148,136,.11);
  --accent-line: rgba(13,148,136,.30);
  --glow:      rgba(13,148,136,.12);

  /* dark "screen" for terminals & embeds */
  --screen:    #0a0c10;
  --screen-2:  #11151b;
  --screen-bar:#161b22;
  --screen-fg: #e7efeb;
  --screen-dim:#8b97a0;
  --screen-border: #232b34;

  --green:     #15803d;
  --amber:     #c2740a;

  --mono:  "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans:  "Spline Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --maxw: 1080px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* atmosphere: fixed teal glow + faint grain, behind all content */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(110% 70% at 50% -12%, var(--glow), transparent 56%),
    radial-gradient(80% 60% at 100% 0%, rgba(13,148,136,.07), transparent 50%),
    var(--bg);
}
body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  opacity: .045; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--accent); color: #fff; }

a { color: var(--accent-2); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--accent-br); text-decoration: none; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.mono { font-family: var(--mono); }

/* shared eyebrow / kicker */
.kicker {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: .22em; text-transform: uppercase; color: var(--accent-2);
  display: inline-flex; align-items: center; gap: 9px;
}
.kicker::before { content: "✦"; color: var(--accent); font-size: 13px; }

/* ============================================================ NAV */
nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245,242,234,.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
nav.scrolled {
  background: rgba(245,242,234,.9);
  border-bottom-color: var(--border);
  box-shadow: 0 1px 0 rgba(0,0,0,.02), 0 14px 30px -26px rgba(27,32,31,.5);
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 18px; }

.logo {
  font-family: var(--mono); font-weight: 600; font-size: 16px; letter-spacing: -.01em;
  color: var(--text); white-space: nowrap; display: inline-flex; align-items: center;
}
.logo a { color: var(--text); display: inline-flex; align-items: center; }
.logo a:hover { color: var(--text); }
.logo .spark { color: var(--accent); margin: 0 .12em; }
.logo::after {
  content: "▌"; color: var(--accent); margin-left: 2px;
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.nav-links { display: flex; gap: 6px; align-items: center; font-family: var(--mono); font-size: 13px; }
.nav-links a {
  color: var(--muted); padding: 7px 11px; border-radius: 7px; position: relative;
  transition: color .18s ease, background .18s ease;
}
.nav-links a:not(.nav-cta):hover { color: var(--text); background: rgba(13,148,136,.07); }
.nav-links a.active { color: var(--accent-2); }
.nav-links a.active::before {
  content: ""; position: absolute; left: 11px; right: 11px; bottom: 2px; height: 2px;
  background: var(--accent); border-radius: 2px;
}
.nav-cta {
  margin-left: 6px; color: var(--accent-2) !important;
  border: 1px solid var(--accent-line); background: var(--accent-soft);
  padding: 7px 15px !important; border-radius: 8px; font-weight: 500;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}
.nav-cta:hover {
  background: var(--accent); color: #fff !important; border-color: var(--accent);
  transform: translateY(-1px);
}
/* divider between in-page section links and destination-page links */
.nav-sep { width: 1px; height: 16px; background: var(--border-2); margin: 0 6px; align-self: center; }

/* mobile toggle */
.nav-toggle {
  display: none; background: none; border: 1px solid var(--border-2); color: var(--text);
  width: 40px; height: 38px; border-radius: 9px; cursor: pointer;
  font-size: 19px; line-height: 1; align-items: center; justify-content: center;
}
.nav-toggle:hover { border-color: var(--accent); color: var(--accent-2); }

/* ============================================================ BUTTONS */
.btn {
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: 14.5px;
  font-family: var(--sans); display: inline-flex; align-items: center; gap: 9px;
  transition: transform .18s var(--ease), box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 12px 26px -14px rgba(13,148,136,.8);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 18px 34px -14px rgba(13,148,136,.9); background: var(--accent-2); }
.btn-ghost { border: 1px solid var(--border-2); color: var(--text); background: var(--card); }
.btn-ghost:hover { color: var(--text); border-color: var(--accent); background: var(--card-2); transform: translateY(-2px); }
.hero-actions { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

/* ============================================================ HERO (home) */
.hero { padding: 92px 0 64px; position: relative; text-align: center; }
.hero .wrap { position: relative; }

.hero-head { max-width: 840px; margin: 0 auto; }
.hero h1 {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(34px, 6vw, 68px); line-height: 1.06; letter-spacing: -.015em;
  margin-top: 22px; color: var(--text);
}
.hero h1 .grad {
  font-style: italic; font-weight: 500; color: var(--accent-2);
  background: linear-gradient(100deg, var(--accent-2), var(--accent-br));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p.sub {
  font-size: clamp(17px, 2.1vw, 20px); color: var(--muted); max-width: 600px; margin: 22px auto 0;
}
.hero p.sub strong { color: var(--text); font-weight: 600; }

.badges { margin-top: 24px; display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.badges img { height: 21px; }

/* copy button (used by the install bar) */
.copy-btn {
  background: rgba(255,255,255,.07); color: var(--screen-fg); border: 1px solid var(--screen-border);
  padding: 6px 13px; border-radius: 7px; cursor: pointer; font-size: 12px;
  font-family: var(--mono); white-space: nowrap; transition: background .18s ease, border-color .18s ease;
}
.copy-btn:hover { background: rgba(45,212,191,.16); border-color: var(--accent-br); }

/* slim one-line install (sits below the intro in the visual-led hero) */
.install-bar {
  margin: 26px auto 0; max-width: 620px;
  display: flex; align-items: center; gap: 12px;
  background: var(--screen); border: 1px solid var(--screen-border);
  border-radius: 12px; padding: 13px 16px;
  font-family: var(--mono); font-size: 13.5px; text-align: left;
  box-shadow: 0 24px 50px -32px rgba(10,12,16,.55);
}
.install-bar .prompt { color: var(--mint); user-select: none; }
.install-bar code { flex: 1; min-width: 0; color: var(--screen-fg); overflow-x: auto; white-space: nowrap; }
.install-bar code::-webkit-scrollbar { height: 0; }

/* animated intro — a dark "screen" on warm paper (the hybrid hero shot).
   A clean monitor bezel, NOT a terminal; the intro contains its own. */
.screen-frame {
  width: min(1000px, 100%); margin: 44px auto 0;
  padding: 8px; background: var(--screen-bar);
  border: 1px solid var(--screen-border); border-radius: 18px; overflow: hidden;
  box-shadow: 0 44px 100px -46px rgba(10,12,16,.62), inset 0 1px 0 rgba(255,255,255,.05);
}
.intro-embed {
  position: relative; width: 100%; aspect-ratio: 1280 / 720; overflow: hidden;
  background: var(--screen); border-radius: 11px;
}
.intro-embed iframe {
  position: absolute; top: 0; left: 0; width: 1280px; height: 720px; border: 0;
  transform-origin: top left;
}
.intro-cap { text-align: center; margin-top: 16px; font-family: var(--mono); font-size: 12.5px; color: var(--faint); }
.intro-cap a { color: var(--accent-2); }

/* legacy screenshot helper (kept for compatibility) */
.screenshot { margin: 56px auto 0; max-width: 920px; }
.screenshot img { width: 100%; display: block; border-radius: 14px; border: 1px solid var(--border); box-shadow: 0 24px 50px -24px rgba(27,32,31,.3); }

/* ============================================================ SECTIONS */
section { padding: 76px 0; position: relative; }
.section-head { max-width: 620px; margin: 0 auto; text-align: center; }
.section-head.left { margin: 0; text-align: left; }
.section-title {
  font-family: var(--serif); font-weight: 500; letter-spacing: -.01em;
  font-size: clamp(28px, 3.8vw, 42px); line-height: 1.1; margin-top: 14px;
}
.section-title em { font-style: italic; color: var(--accent-2); }
.section-sub { color: var(--muted); margin-top: 12px; font-size: 16.5px; }
.section-sub code, .section-sub .mono {
  font-family: var(--mono); font-size: 13.5px; background: var(--accent-soft);
  padding: 1px 7px; border-radius: 5px; color: var(--accent-2);
}

/* ============================================================ FEATURE GRID */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 44px; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 26px; position: relative; overflow: hidden;
  transition: transform .22s var(--ease), border-color .22s ease, box-shadow .22s ease;
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: 14px; pointer-events: none;
  box-shadow: inset 0 0 0 1px transparent; transition: box-shadow .22s ease;
}
.card:hover {
  transform: translateY(-4px); border-color: var(--accent-line);
  box-shadow: 0 24px 44px -28px rgba(13,148,136,.45);
}
.card .idx {
  position: absolute; top: 20px; right: 22px;
  font-family: var(--mono); font-size: 12px; color: var(--faint);
  letter-spacing: .05em; transition: color .22s ease;
}
.card:hover .idx { color: var(--accent); }
.card h3 { font-family: var(--sans); font-weight: 600; font-size: 17.5px; display: flex; align-items: center; gap: 12px; letter-spacing: -.01em; }
.card .ico {
  font-size: 19px; width: 38px; height: 38px; flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px;
}
.card p { color: var(--muted); font-size: 14.5px; margin-top: 12px; }
.card code {
  font-family: var(--mono); font-size: 12.5px; background: var(--accent-soft);
  padding: 1px 6px; border-radius: 5px; color: var(--accent-2);
}
.card.wide {
  grid-column: 1 / -1;
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(20,184,166,.10), transparent 55%),
    var(--card);
  display: flex; flex-direction: column; gap: 18px;
}
.card.wide h3 { font-size: 18.5px; }

/* self-evolving levels track */
.levels { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.level {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--card-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 7px 15px; font-family: var(--mono); font-size: 12.5px; color: var(--muted);
}
.level b { color: var(--accent-2); }
.levels .arrow { color: var(--faint); font-family: var(--mono); }
.level.live {
  border-color: var(--accent); background: var(--accent-soft); color: var(--text);
}
.level.live::after {
  content: "live"; font-size: 9.5px; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: #fff; background: var(--accent);
  padding: 2px 7px; border-radius: 999px;
}
.soon {
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--amber);
  background: rgba(194,116,10,.12); border: 1px solid rgba(194,116,10,.3);
  padding: 3px 10px; border-radius: 999px; vertical-align: middle; margin-left: 4px;
}

/* ============================================================ DEPLOY / PILLS */
.deploy-targets, .pills { display: flex; flex-wrap: wrap; gap: 11px; justify-content: center; margin-top: 40px; }
.pill {
  background: var(--card); border: 1px solid var(--border);
  padding: 9px 16px; border-radius: 999px; font-size: 14px; color: var(--text);
  display: inline-flex; align-items: center; gap: 8px;
  transition: border-color .18s ease, transform .18s ease, background .18s ease;
}
.pill:hover { border-color: var(--accent-line); transform: translateY(-2px); background: var(--card-2); }
.deploy-targets .pill code, .pill code {
  font-family: var(--mono); font-size: 12.5px; background: var(--accent-soft);
  padding: 1px 6px; border-radius: 5px; color: var(--accent-2);
}

/* ============================================================ BENCHMARK */
.bench-wrap { margin-top: 44px; overflow-x: auto; border: 1px solid var(--border); border-radius: 14px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--border); }
th {
  background: var(--bg-soft); color: var(--muted); font-weight: 500;
  font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
}
td { font-family: var(--mono); font-size: 13px; color: var(--text); }
td:first-child { font-family: var(--sans); color: var(--muted); }
tbody tr { transition: background .15s ease; }
tbody tr:hover { background: var(--accent-soft); }
tr:last-child td { border-bottom: none; }
td.adv { color: var(--green); font-weight: 600; }
.bench-note { color: var(--muted); font-size: 13px; text-align: center; margin-top: 18px; font-family: var(--mono); }
.bench-note a { color: var(--accent-2); }

/* ============================================================ CTA BOX */
.cta-box {
  background:
    radial-gradient(120% 160% at 50% -30%, rgba(20,184,166,.16), transparent 60%),
    var(--card);
  border: 1px solid var(--border-2); border-radius: 20px;
  padding: 60px 36px; text-align: center; margin-top: 20px; position: relative; overflow: hidden;
}
.cta-box::before {
  content: "三"; position: absolute; right: 24px; bottom: -28px;
  font-family: var(--serif); font-size: 180px; line-height: 1; color: var(--accent);
  opacity: .05; pointer-events: none;
}
.cta-box h2 { font-family: var(--serif); font-weight: 500; font-size: clamp(26px, 3.4vw, 36px); }
.cta-box p { color: var(--muted); margin-top: 12px; max-width: 520px; margin-left: auto; margin-right: auto; }
.cta-box .hero-actions { justify-content: center; }

/* ============================================================ COMMUNITY */
.qr-row {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 22px; margin-top: 36px;
}
.qr-card {
  flex: 0 1 280px; text-align: center;
  background: var(--card); border: 1px solid var(--border-2); border-radius: 20px;
  padding: 26px 24px 20px;
}
.qr-card img {
  display: block; width: 200px; height: 200px; margin: 0 auto;
  border-radius: 12px; background: #fff;
}
.qr-cap { margin-top: 14px; color: var(--muted); font-size: 13.5px; line-height: 1.5; }
.qr-cap .mono { color: var(--text); }

/* ============================================================ FOOTER */
footer { border-top: 1px solid var(--border); padding: 40px 0; color: var(--muted); font-size: 13.5px; margin-top: 20px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; align-items: center; }
footer .brand { font-family: var(--mono); color: var(--text); }
footer .brand .san { color: var(--accent); }
footer a { color: var(--muted); }
footer a:hover { color: var(--accent-2); }

/* ============================================================ GETTING STARTED */
.page-hero { padding: 86px 0 10px; }
.page-hero .wrap { max-width: 760px; }
.page-hero h1 { font-family: var(--serif); font-weight: 500; font-size: clamp(34px, 5.2vw, 52px); letter-spacing: -.015em; margin-top: 14px; line-height: 1.06; }
.page-hero h1 em { font-style: italic; color: var(--accent-2); }
.page-hero p { color: var(--muted); margin-top: 14px; font-size: 18px; max-width: 560px; }

.steps { counter-reset: step; max-width: 760px; margin: 50px auto 0; display: flex; flex-direction: column; gap: 26px; }
.step { display: flex; gap: 22px; align-items: flex-start; }
.step .num {
  flex: 0 0 auto; width: 42px; height: 42px; border-radius: 12px;
  background: var(--accent); color: #fff; font-weight: 600; font-family: var(--mono);
  display: flex; align-items: center; justify-content: center; font-size: 17px;
  box-shadow: 0 12px 24px -12px rgba(13,148,136,.8);
}
.step-body { flex: 1; min-width: 0; }
.step-body h3 { font-family: var(--sans); font-size: 20px; font-weight: 600; }
.step-body > p { color: var(--muted); margin-top: 7px; }
.step-body .cmd { margin-top: 14px; }
.step-body code.inline,
code.inline { font-family: var(--mono); font-size: 13px; background: var(--accent-soft); padding: 2px 7px; border-radius: 5px; color: var(--accent-2); }

/* light inline command box (subpages) */
.cmd {
  display: flex; align-items: center; gap: 12px;
  background: var(--screen); border: 1px solid var(--screen-border);
  border-radius: 11px; padding: 14px 16px;
  font-family: var(--mono); font-size: 13.5px; text-align: left;
}
.cmd .prompt { color: var(--mint); user-select: none; }
.cmd code { flex: 1; color: var(--screen-fg); overflow-x: auto; white-space: nowrap; }

.substeps { margin: 16px 0 0; padding-left: 0; list-style: none; counter-reset: sub; display: flex; flex-direction: column; gap: 12px; }
.substeps li {
  position: relative; padding: 14px 16px 14px 48px;
  background: var(--card); border: 1px solid var(--border); border-radius: 11px;
  font-size: 14px; color: var(--text);
}
.substeps li::before {
  counter-increment: sub; content: counter(sub, lower-alpha);
  position: absolute; left: 14px; top: 13px;
  width: 24px; height: 24px; border-radius: 7px;
  background: var(--bg); border: 1px solid var(--accent); color: var(--accent-2);
  font-family: var(--mono); font-size: 12px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
}
.substeps li b { color: var(--accent-2); }

/* ============================================================ DOCS INDEX */
.doc-card h3 { font-family: var(--sans); font-size: 16.5px; font-weight: 600; display: flex; align-items: center; gap: 11px; }
.doc-card ul { list-style: none; margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
.doc-card li a {
  color: var(--text); font-size: 14px; display: inline-flex; align-items: baseline; gap: 8px;
}
.doc-card li a::before { content: "›"; color: var(--accent); font-weight: 700; font-family: var(--mono); }
.doc-card li a:hover { color: var(--accent-2); }

/* ============================================================ MOTION */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* staggered hero load-in */
.load-up { opacity: 0; transform: translateY(16px); animation: loadUp .8s var(--ease) forwards; }
@keyframes loadUp { to { opacity: 1; transform: none; } }
.d1 { animation-delay: .05s; } .d2 { animation-delay: .15s; } .d3 { animation-delay: .25s; }
.d4 { animation-delay: .35s; } .d5 { animation-delay: .45s; } .d6 { animation-delay: .55s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .load-up { transition: none; animation: none; opacity: 1; transform: none; }
  .logo::after { animation: none; }
  * { transition: none !important; }
}

/* ============================================================ RESPONSIVE */
@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(245,242,234,.97); backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border); padding: 12px 18px 18px;
    box-shadow: 0 20px 30px -20px rgba(27,32,31,.4);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  nav.open .nav-links { transform: none; opacity: 1; pointer-events: auto; }
  .nav-sep { display: none; }
  .nav-links a { padding: 11px 12px; font-size: 14px; }
  .nav-links a.active::before { display: none; }
  .nav-cta { margin: 6px 0 0; text-align: center; justify-content: center; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 64px 0 44px; }
  section { padding: 56px 0; }
  .step { gap: 16px; }
  .cta-box { padding: 44px 24px; }
}