:root {
  --bg: oklch(0.972 0.012 80);
  --surface: oklch(0.985 0.010 80);
  --surface-glass: color-mix(in oklch, var(--surface) 86%, transparent);
  --line: oklch(0.84 0.014 78);
  --line-soft: oklch(0.91 0.012 78);
  --text: oklch(0.20 0.018 70);
  --muted: oklch(0.50 0.012 70);
  --accent: oklch(0.60 0.18 50);
  --accent-ink: oklch(0.985 0.010 80);
  --signal-grn: oklch(0.55 0.16 145);
  --code-bg: oklch(0.17 0.012 250);
  --code-text: oklch(0.88 0.03 85);
  --shadow: 0 28px 70px color-mix(in oklch, var(--text) 10%, transparent);
  --f-display: "Bricolage Grotesque", system-ui, sans-serif;
  --f-serif: "Instrument Serif", Georgia, serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
  --maxw: 1180px;
  --gutter: clamp(18px, 4vw, 52px);
}

html[data-theme="dark"] {
  --bg: oklch(0.145 0.012 250);
  --surface: oklch(0.21 0.014 250);
  --surface-glass: color-mix(in oklch, var(--surface) 90%, transparent);
  --line: oklch(0.30 0.012 250);
  --line-soft: oklch(0.24 0.012 250);
  --text: oklch(0.965 0.005 90);
  --muted: oklch(0.58 0.012 250);
  --accent: oklch(0.82 0.15 75);
  --accent-ink: oklch(0.18 0.04 75);
  --signal-grn: oklch(0.78 0.18 145);
  --code-bg: oklch(0.105 0.01 250);
  --code-text: oklch(0.90 0.025 85);
}

* { box-sizing: border-box; }
html { max-width: 100%; overflow-x: hidden; scroll-behavior: smooth; }
body {
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: var(--f-display);
  line-height: 1.55;
  transition: color .2s ease, background .2s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .2;
}

.ambient { display: none; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  min-height: 62px;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklch, var(--bg) 92%, transparent);
  backdrop-filter: blur(18px);
}
.brand { color: var(--text); text-decoration: none; display: flex; align-items: center; gap: 11px; font: 600 13px var(--f-mono); letter-spacing: .02em; }
.brand-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--signal-grn); box-shadow: 0 0 0 4px color-mix(in oklch, var(--signal-grn) 15%, transparent); }
.brand-slash { color: var(--muted); }
.mini-nav { display: flex; align-items: center; gap: clamp(16px, 3vw, 34px); }
.mini-nav a, .mini-nav button { border: 0; padding: 4px 0; color: var(--muted); background: none; text-decoration: none; font: 500 11px var(--f-mono); cursor: pointer; }
.mini-nav b { color: var(--accent); font-weight: 500; }
.mini-nav a:hover, .mini-nav button:hover { color: var(--text); }

main { width: 100%; min-width: 0; }
.hero {
  position: relative;
  isolation: isolate;
  min-height: 680px;
  padding: clamp(100px, 12vw, 150px) var(--gutter) 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("assets/hero-bg-poster.jpg") center 40% / cover no-repeat;
  filter: brightness(1.08) saturate(.7);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, color-mix(in oklch, var(--bg) 96%, transparent) 0%, color-mix(in oklch, var(--bg) 86%, transparent) 58%, color-mix(in oklch, var(--bg) 56%, transparent) 100%);
}
html[data-theme="dark"] .hero::before { filter: brightness(.28) saturate(.65); }
.hero > * { width: min(820px, 100%); }
.hero-status { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 44px; }
.hero-status span { padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--surface-glass); font: 500 10px var(--f-mono); letter-spacing: .12em; }
.hero-status i { display: inline-block; width: 6px; height: 6px; margin-right: 7px; border-radius: 50%; background: var(--signal-grn); }
.hero-status i.amber { background: var(--accent); }
.eyebrow, .kicker { margin: 0 0 10px; color: var(--muted); font: 500 11px var(--f-mono); letter-spacing: .13em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(62px, 10vw, 126px); line-height: .82; letter-spacing: -.075em; font-weight: 500; }
.hero h1 em { color: var(--accent); font: 400 italic 1em var(--f-serif); letter-spacing: -.025em; }
.hero h1 .stroke { color: transparent; -webkit-text-stroke: 1.5px var(--text); }
.hero > p { max-width: 690px; margin: 52px 0 0; color: var(--muted); font-size: clamp(16px, 2vw, 20px); }
.hero-actions { width: auto; display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { min-height: 48px; border: 1px solid var(--line); border-radius: 6px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; gap: 24px; color: var(--text); background: var(--surface-glass); font: 600 11px var(--f-mono); letter-spacing: .07em; text-transform: uppercase; text-decoration: none; cursor: pointer; }
.button.primary { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
.button:hover { transform: translateY(-1px); border-color: var(--text); }
.progress-wrap { width: min(640px, 100%); margin-top: 54px; }
.progress-copy { display: flex; justify-content: space-between; margin-bottom: 10px; color: var(--muted); font: 500 10px var(--f-mono); text-transform: uppercase; letter-spacing: .08em; }
.progress-copy strong { color: var(--text); }
.progress-track { height: 4px; overflow: hidden; background: var(--line-soft); }
#progress-bar { width: 0; height: 100%; background: var(--accent); transition: width .35s ease; }

.steps { width: min(var(--maxw), calc(100% - (var(--gutter) * 2))); min-width: 0; margin: 0 auto; padding: 92px 0; display: grid; gap: 28px; }
.step-card { min-width: 0; scroll-margin-top: 90px; padding: clamp(24px, 4vw, 46px); border: 1px solid var(--line); border-radius: 12px; background: var(--surface); box-shadow: var(--shadow); position: relative; }
.step-card::before, .step-card::after { content: ""; position: absolute; width: 16px; height: 16px; pointer-events: none; }
.step-card::before { top: 7px; left: 7px; border-top: 1px solid var(--accent); border-left: 1px solid var(--accent); }
.step-card::after { right: 7px; bottom: 7px; border-right: 1px solid var(--accent); border-bottom: 1px solid var(--accent); }
.step-card.is-done { border-color: color-mix(in oklch, var(--signal-grn) 60%, var(--line)); }
.step-head { display: grid; grid-template-columns: auto 1fr auto; gap: 20px; align-items: center; }
.step-number { width: 48px; height: 48px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 6px; color: var(--accent); background: var(--bg); font: 500 12px var(--f-mono); }
.step-head h2, .finish-card h2 { margin: 0; font-size: clamp(28px, 4vw, 46px); line-height: 1; letter-spacing: -.045em; font-weight: 500; }
.complete-toggle input { position: absolute; opacity: 0; }
.complete-toggle span { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; color: var(--muted); font: 600 10px var(--f-mono); text-transform: uppercase; cursor: pointer; }
.complete-toggle span::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--line); }
.complete-toggle input:checked + span { color: var(--accent-ink); background: var(--signal-grn); border-color: var(--signal-grn); }
.complete-toggle input:checked + span::before { background: var(--accent-ink); }
.lede { max-width: 760px; margin: 28px 0; color: var(--muted); font-size: 16px; }
.action-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.action-link { min-width: 0; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px; padding: 16px; border: 1px solid var(--line); border-radius: 6px; color: var(--text); background: var(--bg); text-decoration: none; }
.action-link:hover { border-color: var(--accent); }
.action-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 4px; color: var(--accent-ink); background: var(--accent); font: 600 12px var(--f-mono); }
.action-icon.subtle { color: var(--text); background: var(--line-soft); }
.action-link span:nth-child(2) { min-width: 0; }
.action-link strong, .action-link small { display: block; }
.action-link strong { font-weight: 600; }
.action-link small { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.action-link b { color: var(--accent); font-family: var(--f-mono); }
.note { margin-top: 16px; padding: 15px 17px; border-left: 3px solid var(--accent); color: var(--muted); background: var(--bg); font-size: 14px; }
.note strong { color: var(--text); }
.mini-list { margin: 20px 0 0; padding-left: 24px; color: var(--muted); }
.mini-list li + li { margin-top: 7px; }

.code-shell { width: 100%; min-width: 0; max-width: 100%; overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); }
.code-bar { min-height: 48px; display: flex; align-items: center; justify-content: space-between; padding: 0 12px 0 17px; border-bottom: 1px solid color-mix(in oklch, var(--code-text) 15%, transparent); color: color-mix(in oklch, var(--code-text) 62%, transparent); font: 500 10px var(--f-mono); letter-spacing: .1em; }
.copy-button { border: 1px solid var(--line); border-radius: 4px; padding: 8px 11px; color: var(--text); background: var(--surface); font: 600 10px var(--f-mono); text-transform: uppercase; cursor: pointer; }
.code-bar .copy-button { border-color: color-mix(in oklch, var(--code-text) 20%, transparent); color: var(--code-text); background: transparent; }
.copy-button:disabled { opacity: .4; cursor: not-allowed; }
pre { width: 100%; max-width: 100%; margin: 0; max-height: 430px; overflow: auto; padding: 20px; }
code { min-width: 0; font-family: var(--f-mono); }
pre code { color: var(--code-text); font-size: 12px; line-height: 1.7; white-space: pre; }
.compact pre { max-height: 300px; }
.fingerprint { display: flex; justify-content: space-between; gap: 16px; margin-top: 13px; color: var(--muted); font: 500 10px var(--f-mono); }
.fingerprint code { overflow-wrap: anywhere; color: var(--text); text-align: right; }
.settings-list { display: grid; gap: 10px; margin-top: 18px; }
.settings-list > div { display: flex; align-items: center; gap: 14px; padding: 14px; border: 1px dashed var(--line); background: var(--bg); }
.settings-list > div > span { width: 30px; height: 30px; display: grid; place-items: center; color: var(--accent); font: 500 11px var(--f-mono); }
.settings-list p, .settings-list small { margin: 0; display: block; }
.settings-list small { margin-top: 2px; color: var(--muted); }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
label > span { display: block; margin-bottom: 7px; color: var(--muted); font: 500 10px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; }
input { width: 100%; border: 1px solid var(--line); border-radius: 4px; padding: 14px; color: var(--text); background: var(--bg); font: 500 14px var(--f-mono); outline: none; }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 15%, transparent); }
.generated-command { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; min-height: 62px; margin-top: 14px; padding: 10px 10px 10px 15px; border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); }
.generated-command code, .detail-code { min-width: 0; overflow-wrap: anywhere; color: var(--code-text); font-size: 12px; }
details { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line); }
summary { cursor: pointer; color: var(--muted); font: 500 11px var(--f-mono); text-transform: uppercase; }
.inline-form { display: grid; grid-template-columns: 1fr auto; gap: 10px; margin: 14px 0 10px; }
.detail-code { display: block; padding: 12px; border-radius: 4px; background: var(--code-bg); }

.finish-card { width: min(var(--maxw), calc(100% - (var(--gutter) * 2))); margin: 0 auto 76px; padding: clamp(30px, 6vw, 64px); display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: end; border: 1px solid var(--line); border-radius: 12px; color: var(--accent-ink); background: var(--accent); }
.finish-card .kicker { color: color-mix(in oklch, var(--accent-ink) 62%, transparent); }
.finish-card p:last-child { margin: 0; color: color-mix(in oklch, var(--accent-ink) 78%, transparent); }
footer { width: 100%; min-height: 64px; padding: 18px var(--gutter); display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); color: var(--muted); font: 500 10px var(--f-mono); text-transform: uppercase; }
.toast { position: fixed; left: 50%; bottom: 24px; z-index: 30; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; padding: 10px 15px; border-radius: 999px; color: var(--accent-ink); background: var(--accent); font: 600 11px var(--f-mono); transition: .25s ease; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 760px) {
  .topbar { min-height: 56px; }
  .brand { font-size: 11px; }
  .brand span:last-child, .mini-nav a { display: none; }
  .mini-nav { margin-left: auto; }
  .hero { min-height: 650px; padding-top: 88px; }
  .hero::after { background: color-mix(in oklch, var(--bg) 82%, transparent); }
  .hero h1 { font-size: clamp(56px, 17vw, 78px); line-height: .88; }
  .hero > p { margin-top: 38px; font-size: 16px; }
  .hero-actions { width: 100%; }
  .button { flex: 1; padding: 0 13px; }
  .progress-copy { gap: 12px; }
  .steps { width: calc(100% - 24px); padding: 54px 0; gap: 16px; }
  .step-head { grid-template-columns: auto 1fr; }
  .complete-toggle { grid-column: 1 / -1; }
  .complete-toggle span { width: 100%; justify-content: center; }
  .action-grid, .form-grid, .finish-card { grid-template-columns: 1fr; }
  .fingerprint { display: block; }
  .fingerprint code { display: block; margin-top: 6px; text-align: left; }
  .finish-card { width: calc(100% - 24px); }
  footer { display: grid; gap: 5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}