/* Grist — dark design system (2026 redesign).
   Dark mode only, per the founder's call. Orange stays the brand
   (#ec5b2b); the canvas is warm near-black, hairlines everywhere,
   one idea per section. */

:root {
  --paper: #0d0a07;
  --card: #171310;
  --panel: #100c09;
  --ink: #f4efe9;
  --ink-2: #c9beb0;
  --muted: #96887a;
  --line: #292019;
  --line-strong: #453626;
  --accent: #ec5b2b;
  --accent-deep: #ff7d47;
  --accent-soft: rgba(236, 91, 43, 0.14);
  --code-bg: #080605;
  --code-ink: #f5ede6;
  --radius: 14px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--accent); color: #fff; }
a { color: var(--accent-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.02em; margin: 0; font-weight: 650; }
p { margin: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 28px; height: 60px; }
.mark { color: var(--ink); display: inline-flex; }
.mark:hover { text-decoration: none; }
.wordmark { height: 22px; width: auto; }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--ink-2); font-size: 14.5px; font-weight: 520; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.star-chip {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line-strong); border-radius: 999px; padding: 4px 11px;
  font-family: var(--mono); font-size: 12.5px; color: var(--ink);
}
.star-chip:hover { border-color: var(--accent); text-decoration: none; }
.star-chip svg { width: 13px; height: 13px; fill: var(--accent); flex: none; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink); color: #17120e; border: 1px solid var(--ink);
  padding: 8px 16px; border-radius: 999px; font-size: 14.5px; font-weight: 560;
  cursor: pointer;
}
.btn:hover { text-decoration: none; background: #fff; }
.btn svg.apple { width: 15px; height: 15px; flex: none; }
.btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.accent:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn.ghost:hover { border-color: var(--ink); }

/* ---------- shared atoms ---------- */
.kicker {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.04em;
  color: var(--accent-deep); text-transform: lowercase; margin-bottom: 18px;
}
section { padding: 96px 0; border-top: 1px solid var(--line); }
section:first-of-type { border-top: none; }
.lede { font-size: 19px; color: var(--ink-2); max-width: 640px; }
.sec-head { max-width: 720px; margin-bottom: 48px; }
.sec-head h2 { font-size: clamp(30px, 4.4vw, 44px); margin-bottom: 16px; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- hero ---------- */
.hero { padding: 88px 0 72px; border-top: none; }
.hero h1 { font-size: clamp(42px, 6.4vw, 72px); max-width: 820px; }
.hero h1 .hl { color: var(--accent); }
.hero .lede { margin-top: 22px; }
.hero-ctas { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; align-items: center; }
.install {
  display: inline-flex; align-items: center; gap: 14px;
  background: var(--code-bg); color: var(--code-ink);
  font-family: var(--mono); font-size: 14.5px;
  padding: 12px 14px 12px 18px; border-radius: 10px;
}
.install .dollar { color: var(--accent); }
.copy-btn {
  background: #2a2019; color: #f5ede6; border: 1px solid #3d2f24;
  font-family: var(--mono); font-size: 12px; padding: 5px 10px; border-radius: 6px; cursor: pointer;
}
.copy-btn:hover { background: #3a2c20; }

/* hero flow diagram */
.flow-card {
  margin-top: 56px; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 28px 20px;
}
.flow { width: 100%; height: auto; display: block; }
.flow .node { fill: #1e1712; stroke: var(--line-strong); }
.flow .node-accent { fill: var(--accent-soft); stroke: var(--accent); }
.flow .lbl { font-family: var(--mono); font-size: 12.5px; fill: var(--ink); }
.flow .sub { font-family: var(--mono); font-size: 10.5px; fill: var(--muted); }
.flow .wire { stroke: var(--line-strong); stroke-width: 1.5; fill: none; }
.flow .pulse { fill: var(--accent); animation: pulse-move 5s linear infinite; }
@keyframes pulse-move {
  0% { offset-distance: 0%; opacity: 0; }
  6% { opacity: 1; }
  94% { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}
.flow-cap { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-top: 14px; text-align: center; }

/* ---------- marquee strip ---------- */
.strip {
  display: flex; gap: 14px; justify-content: center; align-items: center; flex-wrap: wrap;
  padding: 16px 24px; border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 12.5px; color: var(--muted); letter-spacing: .03em;
}
.strip i { color: var(--accent); font-style: normal; }

/* ---------- stats ---------- */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stats-in { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 30px 26px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: none; }
.stat b { display: block; font-size: 30px; letter-spacing: -0.02em; font-weight: 680; }
.stat span { color: var(--muted); font-size: 14px; }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--card); }
.step { padding: 28px 24px 32px; border-left: 1px solid var(--line); }
.step:first-child { border-left: none; }
.step .num { font-family: var(--mono); color: var(--accent); font-size: 13px; }
.step h3 { font-size: 18px; margin: 12px 0 8px; }
.step p { color: var(--ink-2); font-size: 14.5px; }

/* ---------- seven moves ---------- */
.moves { border-top: 1px solid var(--line); }
.move {
  display: grid; grid-template-columns: 46px 230px 1fr; gap: 18px; align-items: baseline;
  padding: 19px 0; border-bottom: 1px solid var(--line);
}
.move .num { font-family: var(--mono); color: var(--accent); font-size: 14px; }
.move h3 { font-size: 17.5px; }
.move p { color: var(--ink-2); font-size: 15px; max-width: 620px; }

/* ---------- local section ---------- */
.local-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 18px; align-items: stretch; }
.local-grid .viz { margin-bottom: 0; }
.local-arrow { align-self: center; font-family: var(--mono); color: var(--accent-deep); font-size: 13px; white-space: nowrap; }
.local-result { text-align: center; color: var(--muted); font-size: 12.5px; margin-top: 18px; }
.signin-note { margin-top: 16px; color: var(--muted); font-size: 14.5px; }

/* ---------- agent prompt block ---------- */
.prompt-block { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 14px; }
.prompt-block summary { cursor: pointer; font-weight: 600; font-size: 15px; list-style: none; }
.prompt-block summary::-webkit-details-marker { display: none; }
.prompt-block pre {
  background: var(--code-bg); color: var(--code-ink); border-radius: 10px;
  padding: 16px 18px; font-family: var(--mono); font-size: 12.5px; line-height: 1.65;
  white-space: pre-wrap; margin: 12px 0; max-height: 264px; overflow: auto;
}

/* ---------- concept grid ---------- */
.concepts { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.concept {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; display: flex; flex-direction: column; gap: 10px; min-width: 0;
}
.concept:hover { border-color: var(--line-strong); }
.concept h3 { font-size: 21px; }

/* Card visuals: every panel shows the concept working, never decoration. */
.viz {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; margin-bottom: 8px; font-family: var(--mono); font-size: 12px;
  display: flex; flex-direction: column; gap: 8px; min-height: 118px; justify-content: center;
}
.viz .row { display: flex; align-items: center; gap: 10px; min-width: 0; }
.viz .task { color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.viz .arrow { color: var(--muted); flex: none; }
.viz .rung-chip {
  flex: none; margin-left: auto; border: 1px solid var(--line-strong); border-radius: 999px;
  padding: 2px 10px; color: var(--ink); font-size: 11.5px;
}
.viz .rung-chip.hot { border-color: var(--accent); color: var(--accent-deep); }
.viz .row .rung-chip:first-child { margin-left: 0; }
.viz .kind { flex: none; font-size: 11px; letter-spacing: .02em; }
.viz .kind.ok { color: var(--accent-deep); }
.viz .kind.bad { color: #ff6d5a; }
.viz .note { color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.viz .bar { height: 10px; border-radius: 5px; background: #2c2117; }
.viz .bar.full { width: 100%; }
.viz .bar.packed { width: 17%; background: var(--accent); }
.viz .cap { color: var(--muted); font-size: 11.5px; display: flex; justify-content: space-between; gap: 10px; }
.viz .dot { flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); }
.viz .dot.run { background: var(--accent); animation: dot-pulse 1.8s ease-in-out infinite; }
.viz .dot.review { background: var(--accent-deep); }
.viz .cost { flex: none; margin-left: auto; color: var(--muted); }
@keyframes dot-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
.viz svg { width: 100%; height: auto; display: block; }
.viz svg .edge { stroke: var(--line-strong); stroke-width: 1.2; }
.viz svg .cm { fill: #1e1712; stroke: var(--line-strong); }
.viz svg .cm-hub { fill: var(--accent-soft); stroke: var(--accent); }
.viz svg .cm-lbl { font-family: var(--mono); font-size: 10.5px; fill: var(--ink); }
.viz svg .cm-sub { font-family: var(--mono); font-size: 9px; fill: var(--muted); }
.concept p { color: var(--ink-2); font-size: 15px; }
.concept a.more { font-weight: 580; font-size: 14.5px; margin-top: auto; }

/* ladder figure */
.ladder { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }
.rung {
  display: flex; justify-content: space-between; align-items: center;
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px;
  font-family: var(--mono); font-size: 13.5px; background: #1e1712;
  animation: rung-light 6s ease-in-out infinite;
}
.rung small { color: var(--muted); }
.rung.hot { border-color: var(--accent); }
@keyframes rung-light {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: inset 0 0 0 1px var(--accent), 0 0 0 4px var(--accent-soft); }
}
.rung:nth-child(2) { animation-delay: 1.2s; }
.rung:nth-child(3) { animation-delay: 2.4s; }
.rung:nth-child(4) { animation-delay: 3.6s; }

/* ---------- faq / cta / footer ---------- */
.faq details { border-top: 1px solid var(--line); padding: 18px 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq details p { color: var(--ink-2); margin-top: 10px; max-width: 720px; }
.cta { text-align: center; }
.cta h2 { font-size: clamp(30px, 4.6vw, 48px); margin-bottom: 14px; }
.cta .lede { margin: 0 auto; }
.cta .install { margin-top: 28px; }
footer { border-top: 1px solid var(--line); padding: 48px 0 56px; }
.foot { display: flex; gap: 40px; flex-wrap: wrap; }
.foot nav { display: flex; flex-direction: column; gap: 8px; font-size: 14.5px; }
.foot nav b { font-size: 13px; font-family: var(--mono); color: var(--muted); font-weight: 500; margin-bottom: 4px; }
.foot nav a { color: var(--ink-2); }
.foot .fine { width: 100%; color: var(--muted); font-size: 13px; margin-top: 12px; }

/* ---------- docs ---------- */
.docs-layout { display: grid; grid-template-columns: 232px minmax(0, 1fr); gap: 48px; padding: 44px 0 96px; align-items: start; }
.docs-side { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 2px; }
.docs-side b { font-family: var(--mono); font-size: 11.5px; color: var(--muted); font-weight: 500; margin: 16px 0 6px; }
.docs-side b:first-child { margin-top: 0; }
.docs-side a { color: var(--ink-2); font-size: 14.5px; padding: 5px 10px; border-radius: 7px; }
.docs-side a:hover { text-decoration: none; background: #221a13; }
.docs-side a.on { background: var(--accent-soft); color: var(--accent-deep); font-weight: 580; }
.prose { min-width: 0; }
.prose h1 { font-size: clamp(32px, 4.6vw, 46px); margin-bottom: 14px; }
.prose h2 { font-size: 26px; margin: 44px 0 12px; }
.prose h3 { font-size: 19px; margin: 30px 0 8px; }
.prose p, .prose li { color: var(--ink-2); font-size: 16px; }
.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { margin: 0 0 14px; padding-left: 22px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--ink); }
.prose code { font-family: var(--mono); font-size: 13.5px; background: #241c14; padding: 1.5px 6px; border-radius: 5px; color: var(--ink); }
.prose pre {
  background: var(--code-bg); color: var(--code-ink); border-radius: 12px;
  padding: 18px 20px; overflow-x: auto; margin: 0 0 18px;
}
.prose pre code { background: none; color: inherit; padding: 0; font-size: 13.5px; line-height: 1.65; }
.prose .lede { margin-bottom: 26px; }
.diagram {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; margin: 0 0 22px;
}
.diagram svg { width: 100%; height: auto; display: block; }
.diagram figcaption { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-top: 12px; text-align: center; }
/* Docs diagrams carry light-theme presentation attributes; restyle them
   for the dark canvas centrally instead of editing every SVG. */
.diagram svg rect, .diagram svg circle { fill: #1e1712; stroke: #453626; }
.diagram svg rect[fill="#fdeee7"], .diagram svg circle[fill="#fdeee7"] { fill: rgba(236, 91, 43, 0.16); stroke: #ec5b2b; }
.diagram svg text { fill: #ece4d8; }
.diagram svg text[fill="#857a6f"] { fill: #96887a; }
.diagram svg text[fill="#c7431a"] { fill: #ff7d47; }
.diagram svg [stroke="#c7431a"] { stroke: #ff7d47; }
.diagram svg [stroke="#d9cec2"] { stroke: #453626; }
.diagram svg [stroke="#857a6f"] { stroke: #6f6154; }
.diagram svg [fill="#fff"] { fill: #1e1712; }
.diagram svg rect[fill="#c7431a"], .diagram svg circle[fill="#c7431a"] { fill: #ec5b2b; }
.diagram svg text[fill="#fff"] { fill: #ece4d8; }
.callout {
  border: 1px solid var(--accent); background: var(--accent-soft);
  border-radius: 12px; padding: 16px 20px; margin: 0 0 20px;
}
.callout p { margin: 0; color: var(--ink); font-size: 15px; }
.prose table { border-collapse: collapse; width: 100%; margin: 0 0 20px; font-size: 15px; }
.prose th, .prose td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.prose th { background: var(--card); font-weight: 620; color: var(--ink); }
.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 56px; border-top: 1px solid var(--line); padding-top: 22px; }
.pager a { font-weight: 580; font-size: 15px; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 8px 0 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px;
}
.card:hover { border-color: var(--line-strong); }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { font-size: 14.5px; margin: 0; }
.card a:hover { text-decoration: none; }
.card a { color: inherit; display: block; height: 100%; }
.card a h3 { color: var(--accent-deep); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .stats-in { grid-template-columns: 1fr 1fr; }
  .stat { border-left: none; border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: none; }
  .steps, .concepts, .cards { grid-template-columns: 1fr; }
  .step { border-left: none; border-top: 1px solid var(--line); }
  .step:first-child { border-top: none; }
  .docs-layout { grid-template-columns: 1fr; gap: 26px; padding-top: 26px; }
  /* Docs nav becomes one swipeable row instead of a wrapped pile. */
  .docs-side {
    position: static; flex-direction: row; flex-wrap: nowrap; align-items: center;
    overflow-x: auto; gap: 4px; padding-bottom: 10px; scrollbar-width: none;
  }
  .docs-side::-webkit-scrollbar { display: none; }
  .docs-side b { display: none; }
  .docs-side a { white-space: nowrap; }
  .move { grid-template-columns: 34px 1fr; }
  .move p { grid-column: 2; }
  .local-grid { grid-template-columns: 1fr; }
  .local-arrow { justify-self: center; transform: rotate(90deg); }
  /* Compact single-row nav: logo, star chip, Sign in, Get started. */
  .nav-in { gap: 12px; }
  .nav-links { gap: 10px; }
  .nav-links a:not(.btn) { display: none; }
  .nav-links a.star-chip { display: inline-flex; padding: 3px 9px; white-space: nowrap; }
  .btn { padding: 7px 13px; font-size: 13.5px; white-space: nowrap; }
  .wordmark { height: 19px; }
  section { padding: 64px 0; }
  .hero { padding: 52px 0 44px; }
  .sec-head { margin-bottom: 32px; }
  /* Diagrams keep legible type: scroll sideways instead of shrinking. */
  .flow-card { overflow-x: auto; }
  .flow { min-width: 600px; }
  .diagram { overflow-x: auto; }
  .diagram svg { min-width: 540px; }
  /* Wide tables and long code tokens wrap instead of forcing page width. */
  .prose table { font-size: 14px; }
  .prose th, .prose td { padding: 8px 10px; overflow-wrap: anywhere; }
  .prose code { overflow-wrap: anywhere; }
  .prose pre code { overflow-wrap: normal; }
  .prose p, .prose li { overflow-wrap: break-word; }
  .pager { flex-wrap: wrap; gap: 10px 16px; }
  .install { max-width: 100%; font-size: 13px; }
  .concept { padding: 22px; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .flow .pulse, .rung, .viz .dot.run { animation: none; }
  html { scroll-behavior: auto; }
}