/* pluck — editorial-technical spec sheet. Bone paper, ink, one vermilion accent. */

:root {
  --paper:    #F1EBDC;
  --paper-2:  #E8E0CC;
  --paper-3:  #DED4BC;
  --ink:      #1B1613;
  --ink-soft: #5C5347;
  --ink-faint:#8A8070;
  --vermilion:#D8442B;
  --vermilion-deep:#B5331E;
  --olive:    #3F5B38;
  --rule:     rgba(27, 22, 19, 0.16);
  --rule-soft:rgba(27, 22, 19, 0.08);

  --code-bg:  #181412;
  --code-fg:  #EDE6D6;
  --code-dim: #8C8270;
  --code-key: #E8916B;
  --code-str: #A9BE86;
  --code-typ: #E3C262;

  --serif: "Fraunces", Georgia, serif;
  --sans:  "Hanken Grotesk", system-ui, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, monospace;

  --maxw: 1180px;
  --gap: clamp(1rem, 4vw, 2.5rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--paper);
  /* fine paper grain */
  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='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  line-height: 1.55;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--vermilion); color: var(--paper); }

a { color: inherit; text-decoration: none; }

/* ---------- shared layout primitives ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gap); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vermilion-deep);
  font-weight: 500;
}

.sec-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
}

h1, h2, h3 { font-family: var(--serif); font-weight: 900; line-height: 0.98; letter-spacing: -0.015em; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: baseline; gap: 0.5rem; font-family: var(--serif); font-weight: 900; font-size: 1.5rem; letter-spacing: -0.03em; }
.brand .dot { color: var(--vermilion); }
.brand .ver { font-family: var(--mono); font-size: 0.62rem; font-weight: 500; letter-spacing: 0.1em; color: var(--ink-faint); transform: translateY(-0.7em); }
.nav { display: flex; align-items: center; gap: 1.6rem; font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.02em; }
.nav a { color: var(--ink-soft); transition: color 0.15s; position: relative; }
.nav a:hover { color: var(--ink); }
.nav a.cta {
  color: var(--paper); background: var(--ink);
  padding: 0.5rem 0.9rem; border-radius: 2px;
}
.nav a.cta:hover { background: var(--vermilion); color: var(--paper); }
.nav-toggle { display: none; }

/* ---------- hero ---------- */
.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(2.5rem, 6vw, 4.5rem); border-bottom: 1px solid var(--rule); position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.hero h1 { font-size: clamp(2.8rem, 7vw, 5.4rem); margin: 1.1rem 0 0; }
.hero h1 em { font-style: italic; font-weight: 500; color: var(--vermilion); }
.hero .lede { font-size: clamp(1.05rem, 1.6vw, 1.28rem); color: var(--ink-soft); max-width: 34ch; margin-top: 1.4rem; }
.hero .actions { display: flex; gap: 0.8rem; margin-top: 2rem; flex-wrap: wrap; }

.btn { font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.02em; padding: 0.8rem 1.3rem; border-radius: 2px; border: 1px solid var(--ink); transition: all 0.16s; cursor: pointer; display: inline-flex; align-items: center; gap: 0.5rem; }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--vermilion); border-color: var(--vermilion); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); transform: translateY(-2px); }

/* staggered load reveal */
.reveal { opacity: 0; transform: translateY(14px); animation: rise 0.7s cubic-bezier(0.2,0.7,0.2,1) forwards; }
.reveal.d1 { animation-delay: 0.05s; }
.reveal.d2 { animation-delay: 0.15s; }
.reveal.d3 { animation-delay: 0.25s; }
.reveal.d4 { animation-delay: 0.38s; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .reveal { animation: none; opacity: 1; transform: none; } }

/* ---------- code panel ---------- */
.code {
  background: var(--code-bg); color: var(--code-fg);
  font-family: var(--mono); font-size: 0.82rem; line-height: 1.7;
  border-radius: 4px; overflow: hidden;
  box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 22px 45px -28px rgba(24,20,18,0.8);
}
.code-bar { display: flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1rem; border-bottom: 1px solid rgba(237,230,214,0.1); }
.code-bar .fname { font-size: 0.72rem; color: var(--code-dim); letter-spacing: 0.04em; }
.code-bar .dots { display: flex; gap: 6px; margin-left: auto; }
.code-bar .dots i { width: 9px; height: 9px; border-radius: 50%; background: rgba(237,230,214,0.18); display: block; }
.code pre { padding: 1.15rem 1.3rem; overflow-x: auto; }
.code .cm { color: var(--code-dim); font-style: italic; }
.code .kw { color: var(--code-key); }
.code .st { color: var(--code-str); }
.code .ty { color: var(--code-typ); }
.code .fn { color: var(--code-fg); }
.code .pn { color: var(--code-dim); }
.copy-btn { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--code-dim); background: transparent; border: 1px solid rgba(237,230,214,0.16); border-radius: 2px; padding: 0.2rem 0.5rem; cursor: pointer; transition: all 0.15s; }
.copy-btn:hover { color: var(--code-fg); border-color: rgba(237,230,214,0.4); }
.copy-btn.done { color: var(--code-str); border-color: var(--code-str); }

/* ---------- pipeline strip ---------- */
.pipeline { padding: clamp(2.5rem, 6vw, 4rem) 0; border-bottom: 1px solid var(--rule); }
.pipeline-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 2rem; flex-wrap: wrap; gap: 0.5rem; }
.pipe-row { display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; }
.pipe-step { flex: 1; min-width: 140px; border: 1px solid var(--rule); border-right: none; padding: 1.1rem 1.1rem 1.3rem; background: var(--paper-2); position: relative; }
.pipe-step:last-child { border-right: 1px solid var(--rule); }
.pipe-step .n { font-family: var(--mono); font-size: 0.68rem; color: var(--ink-faint); letter-spacing: 0.12em; }
.pipe-step .t { font-family: var(--serif); font-weight: 900; font-size: 1.15rem; margin-top: 0.5rem; }
.pipe-step .d { font-size: 0.82rem; color: var(--ink-soft); margin-top: 0.35rem; line-height: 1.4; }
.pipe-step.fast { background: var(--ink); color: var(--paper); }
.pipe-step.fast .n { color: var(--vermilion); }
.pipe-step.fast .d { color: rgba(241,235,220,0.7); }
.pipe-note { font-family: var(--mono); font-size: 0.76rem; color: var(--ink-soft); margin-top: 1rem; }
.pipe-note b { color: var(--vermilion-deep); }

/* ---------- numbered feature sections ---------- */
.features { padding: clamp(2.5rem, 6vw, 4.5rem) 0 1rem; }
.feature { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(1.5rem, 5vw, 4rem); padding: clamp(2.2rem,5vw,3.5rem) 0; border-top: 1px solid var(--rule); align-items: start; }
.feature:first-of-type { border-top: none; }
.feature h2 { font-size: clamp(1.9rem, 3.4vw, 2.9rem); margin: 0.7rem 0 0; }
.feature .body { font-size: 1.02rem; color: var(--ink-soft); max-width: 46ch; }
.feature .body p + p { margin-top: 0.9rem; }
.feature .body strong { color: var(--ink); font-weight: 700; }
.tag { display: inline-block; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--olive); border: 1px solid color-mix(in srgb, var(--olive) 40%, transparent); padding: 0.15rem 0.5rem; border-radius: 2px; margin-top: 1rem; }

/* ---------- compose / quote band ---------- */
.band { background: var(--ink); color: var(--paper); padding: clamp(3rem,7vw,5rem) 0; }
.band .seam { font-family: var(--serif); font-weight: 500; font-style: italic; font-size: clamp(1.5rem, 3.4vw, 2.5rem); line-height: 1.2; max-width: 24ch; }
.band .seam b { font-style: normal; font-weight: 900; color: var(--vermilion); }
.band .split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); align-items: center; }
.band .who { font-family: var(--mono); font-size: 0.82rem; color: rgba(241,235,220,0.65); line-height: 1.8; }
.band .who span { color: var(--paper); }

/* ---------- start band ---------- */
.start { padding: clamp(3rem,7vw,5rem) 0; border-bottom: 1px solid var(--rule); }
.start-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: var(--gap); align-items: center; }
.start h2 { font-size: clamp(2rem,4vw,3.2rem); }

/* ---------- footer ---------- */
footer { padding: 3rem 0; }
footer .wrap { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 1.5rem; }
footer .fnote { font-family: var(--mono); font-size: 0.74rem; color: var(--ink-faint); line-height: 1.7; }
footer .flinks { display: flex; gap: 1.4rem; font-family: var(--mono); font-size: 0.8rem; }
footer .flinks a:hover { color: var(--vermilion-deep); }
.status-pill { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; border: 1px solid var(--rule); padding: 0.25rem 0.6rem; border-radius: 99px; color: var(--ink-soft); }
.status-pill b { color: var(--olive); }

/* ---------- docs layout ---------- */
.docs { display: grid; grid-template-columns: 232px 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); max-width: 1240px; margin: 0 auto; padding: 2.5rem var(--gap) 5rem; }
.side { position: sticky; top: 88px; align-self: start; height: max-content; }
.side .grp { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); padding: 1.2rem 0 0.4rem 0.95rem; }
.side .grp:first-child { padding-top: 0; }
.side a { display: block; position: relative; font-family: var(--mono); font-size: 0.8rem; color: var(--ink-soft); padding: 0.3rem 0 0.3rem 0.95rem; transition: color 0.13s; }
.side a::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 5px; height: 5px; border-radius: 50%; background: var(--vermilion); opacity: 0; transition: opacity 0.13s; }
.side a:hover { color: var(--ink); }
.side a.active { color: var(--vermilion-deep); font-weight: 600; }
.side a.active::before { opacity: 1; }

.doc-main { min-width: 0; max-width: 760px; }
.doc-main h1 { font-size: clamp(2.4rem, 5vw, 3.4rem); }
.doc-main h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 3rem 0 0.4rem; padding-top: 1.3rem; border-top: 1px solid var(--rule); scroll-margin-top: 88px; }
.doc-main h3 { font-family: var(--mono); font-weight: 600; font-size: 1rem; letter-spacing: 0.01em; margin: 1.8rem 0 0.5rem; color: var(--ink); scroll-margin-top: 88px; }
.doc-main p { color: var(--ink-soft); margin: 0.8rem 0; }
.doc-main p strong { color: var(--ink); }
.doc-main ul { color: var(--ink-soft); margin: 0.8rem 0 0.8rem 1.1rem; }
.doc-main li { margin: 0.35rem 0; }
.doc-main .code { margin: 1.1rem 0; }
.doc-lede { font-size: 1.15rem; color: var(--ink-soft) !important; margin-top: 1rem !important; max-width: 56ch; }
code.inline { font-family: var(--mono); font-size: 0.85em; background: var(--paper-2); border: 1px solid var(--rule-soft); padding: 0.08em 0.36em; border-radius: 3px; color: var(--vermilion-deep); white-space: nowrap; }

/* signature/api block */
.sig { font-family: var(--mono); font-size: 0.82rem; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 4px; padding: 0.7rem 1rem; margin: 1rem 0; color: var(--ink); overflow-x: auto; }
.sig .ty { color: var(--vermilion-deep); }

.callout { border: 1px solid var(--rule); border-radius: 4px; padding: 1rem 1.2rem; margin: 1.4rem 0; background: var(--paper-2); font-size: 0.92rem; }
.callout .lbl { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--vermilion-deep); display: block; margin-bottom: 0.35rem; }

table.ref { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: 0.88rem; }
table.ref th { text-align: left; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); padding: 0.5rem 0.7rem; border-bottom: 1px solid var(--rule); }
table.ref td { padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--rule-soft); color: var(--ink-soft); vertical-align: top; }
table.ref td:first-child { font-family: var(--mono); color: var(--ink); white-space: nowrap; }
table.ref td .ty { color: var(--vermilion-deep); font-family: var(--mono); }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .hero-grid, .feature, .band .split, .start-grid { grid-template-columns: 1fr; }
  .hero .code-wrap { order: 2; }
  .feature .head { display: flex; align-items: baseline; gap: 0.8rem; }
  .pipe-step { border-right: 1px solid var(--rule); border-bottom: none; min-width: 45%; }
  .docs { grid-template-columns: 1fr; }
  .side { position: static; border: 1px solid var(--rule); border-radius: 4px; padding: 0.5rem 0.8rem 1rem; margin-bottom: 1.5rem; }
  .side nav { display: flex; flex-wrap: wrap; gap: 0.2rem 1rem; }
  .side .grp { width: 100%; padding-left: 0; }
  .side a { padding-left: 0; }
  .side a::before { display: none; }
  .nav .hide-sm { display: none; }
}
@media (max-width: 560px) {
  .nav { gap: 1rem; }
}

/* ---------- pinch / pluck mark ---------- */
.mark { display: inline-block; vertical-align: -0.24em; color: var(--ink); margin-right: 0.2rem; }
.hand { fill: currentColor; }
.digit { stroke: currentColor; fill: none; stroke-linecap: round; }
.seed { fill: var(--vermilion); }

.brand { gap: 0.34rem; }

/* hero brand moment — larger, static */
.hero-mark { display: block; width: clamp(92px, 11vw, 122px); height: auto; color: var(--ink); margin-bottom: 1.3rem; }

/* ---------- agent affordances: copy-as-markdown ---------- */
.md-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.65rem; margin-top: 1.3rem; font-family: var(--mono); font-size: 0.76rem; }
.md-btn { display: inline-flex; align-items: center; gap: 0.45rem; font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.01em; color: var(--ink); background: var(--paper-2); border: 1px solid var(--rule); border-radius: 2px; padding: 0.44rem 0.72rem; cursor: pointer; transition: all 0.15s; }
.md-btn:hover { border-color: var(--ink); transform: translateY(-1px); }
.md-btn.done { color: var(--olive); border-color: var(--olive); }
.md-btn svg { width: 14px; height: 14px; flex: none; }
.md-link { color: var(--ink-soft); border-bottom: 1px solid var(--rule); padding-bottom: 1px; transition: all 0.13s; }
.md-link:hover { color: var(--vermilion-deep); border-bottom-color: var(--vermilion); }
.md-actions .sep { color: var(--ink-faint); }