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

:root {
  --ink: #173b4d;
  --ink-soft: #315565;
  --cream: #f4f1ea;
  --paper: #fffdf8;
  --line: #d9d2c6;
  --orange: #d96c43;
  --orange-deep: #b95332;
  --mint: #d9e9e2;
  --muted: #687477;
  --sans: "DM Sans", "Segoe UI", sans-serif;
  --mono: "Space Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: var(--sans);
  font-size: 1.1rem;
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
.shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: .01em; }
.brand img { width: 30px; height: 30px; }
.site-header nav { display: flex; align-items: center; gap: 24px; color: var(--ink-soft); font-size: 1.05rem; }
.site-header nav a:hover { color: var(--orange-deep); }
.nav-button { padding: 8px 13px; border: 1px solid var(--ink); color: var(--ink); }

.hero { min-height: 520px; display: grid; grid-template-columns: 1.04fr .96fr; align-items: center; gap: 64px; padding: 58px 0 64px; }
.eyebrow { margin: 0 0 15px; color: var(--orange-deep); font: 700 .88rem/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 650px; margin-bottom: 19px; font-size: clamp(2.8rem, 5vw, 4.7rem); line-height: 1; letter-spacing: -.045em; }
h2 { margin-bottom: 14px; font-size: clamp(2rem, 3.4vw, 3.2rem); line-height: 1.08; letter-spacing: -.04em; }
h3 { margin-bottom: 11px; font-size: 1.25rem; line-height: 1.15; }
.hero-text { max-width: 540px; margin-bottom: 27px; color: var(--ink-soft); font-size: 1.25rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-bottom: 26px; }
.button { display: inline-flex; align-items: center; gap: 10px; padding: 12px 17px; font-weight: 700; }
.button-primary { color: var(--paper); background: var(--orange); }
.button-primary:hover { background: var(--orange-deep); }
.button-quiet { border: 1px solid var(--ink); }
.button-quiet:hover { background: var(--ink); color: var(--paper); }
.terminal-line { width: fit-content; padding: 10px 13px; background: var(--ink); color: var(--paper); font: .92rem var(--mono); }
.terminal-line span { margin-right: 9px; color: var(--orange); }

.hero-art { min-height: 300px; padding: 27px; background: var(--paper); border: 1px solid var(--line); }
.quick-panel-header { display: flex; align-items: center; gap: 11px; padding-bottom: 20px; border-bottom: 1px solid var(--line); font: 700 .92rem var(--mono); text-transform: uppercase; }
.quick-panel-header img { width: 34px; height: 34px; }
.quick-panel dl { margin: 4px 0 0; }
.quick-panel dl div { display: grid; grid-template-columns: 90px 1fr; gap: 15px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.quick-panel dl div:last-child { border-bottom: 0; }
.quick-panel dt { color: var(--orange-deep); font: 700 .82rem var(--mono); text-transform: uppercase; }
.quick-panel dd { margin: 0; color: var(--ink-soft); font-size: 1.08rem; }

.signal-strip { background: var(--orange); color: var(--paper); }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal-grid div { display: flex; align-items: center; gap: 13px; min-height: 68px; border-right: 1px solid rgba(255,255,255,.3); padding: 0 20px; }
.signal-grid div:first-child { padding-left: 0; }
.signal-grid div:last-child { border: 0; }
.signal-grid strong { font: .9rem var(--mono); opacity: .75; }
.signal-grid span { font-weight: 600; font-size: 1.05rem; }

.section { padding: 112px 0; }
.section-heading { max-width: 660px; margin-bottom: 45px; }
.section-heading > p:last-child { max-width: 550px; color: var(--muted); font-size: 1.18rem; }
.use-case-graphic { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; gap: 15px; margin-bottom: 45px; }
.use-case-stage { min-height: 158px; padding: 22px; border: 1px solid var(--line); background: var(--paper); }
.use-case-stage-selected { border-color: var(--orange); background: #fff1e8; }
.use-case-stage-result { color: var(--paper); border-color: var(--ink); background: var(--ink); }
.use-case-label { display: block; margin-bottom: 22px; color: var(--orange-deep); font: 700 .78rem var(--mono); text-transform: uppercase; }
.use-case-stage-result .use-case-label { color: #f1a17e; }
.commit-tree { display: block; width: 100%; height: 70px; margin-bottom: 17px; overflow: visible; }
.tree-line { fill: none; stroke: var(--line); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.tree-line-selected { stroke: var(--orange); }
.commit-node { stroke: var(--paper); stroke-width: 4; }
.commit-muted { fill: var(--line); }
.commit-selected { fill: var(--orange); }
.use-case-stage p { margin: 0; color: var(--muted); font-size: .95rem; line-height: 1.35; }
.use-case-stage-result p { color: #c5d4d5; }
.use-case-arrow { color: var(--orange); font: 700 1.5rem var(--mono); }
.pr-line { display: flex; flex-direction: column; gap: 5px; min-height: 39px; margin-bottom: 17px; color: #c5d4d5; font: .78rem var(--mono); }
.pr-line strong { color: var(--paper); font-size: .92rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.feature-card { min-height: 280px; display: flex; flex-direction: column; padding: 25px; border: 1px solid var(--line); background: var(--paper); }
.feature-card p { color: var(--muted); font-size: 1.08rem; }
.card-index { margin-bottom: 47px; font: .88rem var(--mono); color: var(--orange-deep); }
.feature-card code { margin-top: auto; width: fit-content; padding: 8px 10px; background: var(--mint); font: .88rem var(--mono); }
.feature-card-dark { color: var(--paper); background: var(--ink); border-color: var(--ink); }
.feature-card-dark p { color: #c5d4d5; }
.feature-card-dark code { color: var(--ink); background: var(--paper); }
.feature-card-orange { background: var(--orange); color: var(--paper); border-color: var(--orange); }
.feature-card-orange p { color: #fff0e8; }
.feature-card-orange .card-index { color: #ffe1d2; }
.feature-card-orange code { background: var(--ink); color: var(--paper); }

.gui-section { padding: 100px 0; color: var(--paper); background: var(--ink); }
.gui-layout { display: grid; grid-template-columns: .85fr 1.15fr; align-items: center; gap: 65px; }
.gui-copy .eyebrow { color: #f1a17e; }
.gui-copy h2 { max-width: 490px; }
.gui-copy > p:not(.eyebrow) { max-width: 470px; color: #c6d5d6; font-size: 1.14rem; }
.check-list { display: grid; gap: 10px; padding: 0; margin: 27px 0 31px; list-style: none; color: #f8f4e8; }
.check-list li::before { content: "→"; margin-right: 10px; color: var(--orange); font-weight: 700; }
.terminal-line-light { color: var(--ink); background: var(--paper); }
.screenshot-frame { margin: 0; padding: 10px; background: #e7dfd2; box-shadow: 18px 18px 0 var(--orange); }
.screenshot-frame img { display: block; width: 100%; height: auto; }
.screenshot-frame figcaption { padding: 10px 4px 1px; color: var(--ink); font: .82rem var(--mono); }

.install-section { padding-bottom: 86px; }
.compact-heading { margin-bottom: 31px; }
.tab-list { display: flex; gap: 8px; margin-bottom: 15px; border-bottom: 1px solid var(--line); }
.tab-button { padding: 12px 16px; border: 0; border-bottom: 3px solid transparent; background: transparent; color: var(--muted); font: 700 .88rem var(--sans); cursor: pointer; }
.tab-button:hover, .tab-button:focus-visible { color: var(--ink); }
.tab-button.is-active { border-bottom-color: var(--orange); color: var(--ink); }
.tab-panel[hidden] { display: none; }
.install-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.install-card { padding: 25px; background: var(--ink); color: var(--paper); }
.install-card .copy-button { margin-top: 18px; border-color: var(--paper); color: var(--paper); }
.install-card .copy-button:hover, .install-card .copy-button:focus-visible { background: var(--paper); color: var(--ink); }
.platform { display: block; margin-bottom: 18px; color: #a9c2c2; font: .86rem var(--mono); text-transform: uppercase; }
pre { margin: 0; white-space: pre-wrap; }
pre code { color: #f6b193; font: .94rem/1.8 var(--mono); }
.command-example { display: flex; align-items: center; gap: 18px; margin-top: 15px; padding: 18px 20px; border: 1px solid var(--line); background: var(--paper); }
.command-tag { color: var(--orange-deep); font: .84rem var(--mono); font-weight: 700; }
.command-example code { font: .94rem var(--mono); overflow-wrap: anywhere; }
.copy-button { margin-left: auto; padding: 8px 12px; border: 1px solid var(--ink); background: transparent; color: var(--ink); font: 700 .82rem var(--sans); cursor: pointer; }
.copy-button:hover, .copy-button:focus-visible { background: var(--ink); color: var(--paper); }
.copy-status { color: var(--orange-deep); font-size: .82rem; white-space: nowrap; }

.site-footer { display: flex; justify-content: space-between; gap: 20px; padding: 28px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 1rem; }
.site-footer a { color: var(--orange-deep); font-weight: 700; }

@media (max-width: 850px) {
  .hero, .gui-layout { grid-template-columns: 1fr; gap: 42px; }
  .hero { padding-top: 58px; }
  .hero-art { min-height: 330px; }
  .use-case-graphic { grid-template-columns: 1fr; gap: 10px; }
  .use-case-arrow { justify-self: center; transform: rotate(90deg); }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 250px; }
  .card-index { margin-bottom: 30px; }
}
@media (max-width: 620px) {
  .shell, .site-header { width: min(100% - 30px, 1160px); }
  .site-header { min-height: 65px; }
  .site-header nav a:not(.nav-button) { display: none; }
  .hero { min-height: auto; padding: 54px 0 60px; }
  h1 { font-size: 3.15rem; }
  h2 { font-size: 2.35rem; }
  .signal-grid { grid-template-columns: 1fr 1fr; }
  .signal-grid div, .signal-grid div:first-child { min-height: 64px; padding: 0 8px; border-bottom: 1px solid rgba(255,255,255,.3); border-right: 1px solid rgba(255,255,255,.3); }
  .signal-grid div:nth-child(2) { border-right: 0; }
  .signal-grid div:nth-child(3), .signal-grid div:nth-child(4) { border-bottom: 0; }
  .section, .gui-section { padding: 72px 0; }
  .install-grid { grid-template-columns: 1fr; }
  .command-example { align-items: flex-start; flex-direction: column; gap: 8px; }
  .copy-button { margin-left: 0; }
  .site-footer { flex-direction: column; padding-bottom: 28px; }
}