/* workflowd site — "The Loom" design language.
   Natural dyes on linen; punch-card code blocks; hand-drawn SVG assets.
   No webfonts, no frameworks, no build step — the site must prove the
   single-binary, zero-dependency promise the product makes. */

:root {
  /* workshop (day) */
  --linen:       #F3ECDF;
  --cloth:       #FBF7ED;
  --cloth-deep:  #EDE4D2;
  --edge:        #DACDB4;
  --edge-strong: #C9B896;
  --ink:         #2C2318;
  --ink-soft:    #6E6046;

  --indigo:      #3F5089;  --indigo-wash:  #E3E4EE;
  --madder:      #A63A2B;  --madder-wash:  #F3DFD7;
  --ochre:       #A97B24;  --ochre-wash:   #F2E7CB;
  --leaf:        #47663F;  --leaf-wash:    #DFE8D5;
  --walnut:      #6C5433;  --walnut-wash:  #E9E0CC;
  --slate:       #79715C;  --slate-wash:   #E7E1D2;

  --tok-kw:   #3F5089;
  --tok-str:  #47663F;
  --tok-num:  #A97B24;
  --tok-com:  #8B7B60;

  --shadow: 0 1px 2px rgba(44,35,24,.06), 0 14px 34px -20px rgba(44,35,24,.3);
  --radius: 14px;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    /* the dye vat (night) */
    --linen:       #161210;
    --cloth:       #201A15;
    --cloth-deep:  #191411;
    --edge:        #372E24;
    --edge-strong: #4A3E30;
    --ink:         #EDE3CF;
    --ink-soft:    #A5947A;

    --indigo:      #93A3DC;  --indigo-wash:  #23283E;
    --madder:      #DE8168;  --madder-wash:  #3A221B;
    --ochre:       #D9AC55;  --ochre-wash:   #362B17;
    --leaf:        #96BC80;  --leaf-wash:    #22301D;
    --walnut:      #C2A377;  --walnut-wash:  #2E2519;
    --slate:       #97907C;  --slate-wash:   #26221B;

    --tok-kw:   #93A3DC;
    --tok-str:  #96BC80;
    --tok-num:  #D9AC55;
    --tok-com:  #857458;

    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 18px 40px -20px rgba(0,0,0,.65);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --linen: #161210; --cloth: #201A15; --cloth-deep: #191411;
  --edge: #372E24; --edge-strong: #4A3E30; --ink: #EDE3CF; --ink-soft: #A5947A;
  --indigo: #93A3DC; --indigo-wash: #23283E;
  --madder: #DE8168; --madder-wash: #3A221B;
  --ochre: #D9AC55; --ochre-wash: #362B17;
  --leaf: #96BC80; --leaf-wash: #22301D;
  --walnut: #C2A377; --walnut-wash: #2E2519;
  --slate: #97907C; --slate-wash: #26221B;
  --tok-kw: #93A3DC; --tok-str: #96BC80; --tok-num: #D9AC55; --tok-com: #857458;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 18px 40px -20px rgba(0,0,0,.65);
}

* { box-sizing: border-box; }

/* Author display rules (e.g. .pattern-panel { display:grid }) would otherwise
   beat the UA's [hidden] stylesheet and show every tab panel at once. */
[hidden] { display: none !important; }

::selection { background: var(--indigo); color: var(--linen); }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink);
  background:
    repeating-linear-gradient(45deg, transparent 0 7px, rgba(44,35,24,.02) 7px 8px),
    radial-gradient(110% 70% at 50% -5%, rgba(63,80,137,.06), transparent 55%),
    var(--linen);
  background-attachment: fixed;
}
@media (prefers-color-scheme: dark) {
  body {
    background:
      repeating-linear-gradient(45deg, transparent 0 7px, rgba(237,227,207,.018) 7px 8px),
      radial-gradient(110% 70% at 50% -5%, rgba(147,163,220,.05), transparent 55%),
      var(--linen);
    background-attachment: fixed;
  }
}

a { color: var(--indigo); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-style: wavy; }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; letter-spacing: -.012em; line-height: 1.18; margin: 0; }
code { font-family: var(--mono); font-size: .86em; background: var(--cloth-deep); border: 1px solid var(--edge); border-radius: 5px; padding: .1em .38em; white-space: nowrap; }
pre code { border: 0; background: none; padding: 0; white-space: pre; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 26px; }

/* ---------- mark ---------- */
.mark { width: 28px; height: 28px; display: block; }
.mk-weft { fill: var(--indigo); }
.mk-warp { fill: var(--ink); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--cloth) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--edge);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 13px 26px; max-width: 1120px; margin: 0 auto; }
.nav-brand {
  display: inline-flex; align-items: center; gap: 11px;
  font-family: var(--serif); font-weight: 650; font-size: 18px;
  color: var(--ink); text-decoration: none;
}
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--ink-soft); text-decoration: none; font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  background: var(--indigo); color: var(--linen) !important;
  padding: 7px 15px; border-radius: 999px; font-weight: 600 !important;
  transition: filter .15s ease;
}
.nav-cta:hover { filter: brightness(1.1); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: inherit; font-size: 15px; font-weight: 600;
  padding: 11px 22px; border-radius: 11px;
  border: 1px solid var(--edge-strong);
  background: var(--cloth); color: var(--ink);
  text-decoration: none; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease, filter .15s ease;
}
.btn:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.btn:focus-visible { outline: 2px solid var(--indigo); outline-offset: 2px; }
.btn-primary { background: var(--indigo); border-color: var(--indigo); color: var(--linen); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 84px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 10fr) minmax(0, 9fr); gap: 54px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--walnut);
  background: var(--walnut-wash);
  border: 1px solid transparent;
  padding: 5px 13px; border-radius: 999px;
}
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.hero h1 { font-size: clamp(38px, 5.4vw, 62px); margin: 22px 0 0; }
.hero h1 em { font-style: italic; color: var(--indigo); }
.hero .sub { font-size: 18px; color: var(--ink-soft); max-width: 34em; margin: 20px 0 0; }
.hero-actions { display: flex; gap: 13px; flex-wrap: wrap; margin-top: 30px; }
.hero-note { margin: 18px 0 0; font-size: 13px; color: var(--ink-soft); font-family: var(--serif); font-style: italic; }
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; display: block; }
.hero-caption {
  margin: 10px 6px 0; font-size: 12.5px; color: var(--ink-soft);
  font-family: var(--serif); font-style: italic; text-align: center;
}

/* shuttle animation on the hero loom */
.shuttle-track { animation: shuttle 9s ease-in-out infinite alternate; }
@keyframes shuttle { from { transform: translateX(0); } to { transform: translateX(228px); } }
@media (prefers-reduced-motion: reduce) { .shuttle-track { animation: none; } }

/* hero loom parts */
.wl-ground       { stroke: var(--edge-strong); stroke-width: 1.5; stroke-linecap: round; opacity: .6; }
.wl-wood         { fill: var(--walnut); }
.wl-wood-dark    { fill: var(--walnut); filter: brightness(.92); }
.wl-thread line   { stroke: var(--edge-strong); stroke-width: 1.4; opacity: .75; }
.wl-pick-indigo  { fill: var(--indigo); }
.wl-pick-leaf    { fill: var(--leaf); }
.wl-pick-ochre   { fill: var(--ochre); }
.wl-pick-current { fill: none; stroke: var(--madder); stroke-width: 2; stroke-dasharray: 7 5; }
.wl-shuttle      { fill: var(--ink); }
.wl-shuttle-eye  { fill: var(--linen); }
.wl-roll         { fill: var(--leaf-wash); stroke: var(--edge-strong); stroke-width: 1.2; }
.wl-string       { stroke: var(--edge-strong); stroke-width: 1.4; }
.wl-card         { fill: var(--cloth); stroke: var(--edge-strong); stroke-width: 1.3; }
.wl-card-live    { stroke: var(--ochre); stroke-width: 1.8; }
.wl-link         { fill: var(--edge-strong); }
.wl-hole circle  { fill: var(--linen); stroke: var(--edge); stroke-width: .8; }
.wl-label        { font-family: var(--mono); font-size: 9px; letter-spacing: .08em; fill: var(--ink-soft); }
.wl-label-live   { fill: var(--ochre); font-weight: 700; }

/* ---------- sections ---------- */
section { padding: 78px 0; }
.section-alt { background: color-mix(in srgb, var(--cloth-deep) 55%, transparent); border-block: 1px solid var(--edge); }
.section-head { max-width: 720px; margin: 0 auto 46px; text-align: center; }
.section-head h2 { font-size: clamp(27px, 3.6vw, 38px); }
.section-head p { color: var(--ink-soft); font-size: 16.5px; margin: 14px 0 0; }
.kicker {
  display: block; font-size: 12px; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ochre); margin-bottom: 14px;
}

/* ---------- cards ---------- */
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  position: relative;
  background: var(--cloth);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  padding: 24px 24px 22px;
  box-shadow: var(--shadow);
}
.card::before {
  content: ""; position: absolute; inset: 5px;
  border: 1px dashed var(--edge-strong);
  border-radius: calc(var(--radius) - 6px);
  pointer-events: none; opacity: .7;
}
.card h3 { font-size: 18.5px; margin-bottom: 8px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 14.5px; }
.card .icon { margin-bottom: 14px; color: var(--indigo); }
.card .icon svg { width: 30px; height: 30px; display: block; }
.card-x .icon { color: var(--madder); }
.card-y .icon { color: var(--leaf); }

.callout {
  background: var(--indigo-wash);
  border-left: 3px solid var(--indigo);
  border-radius: 0 11px 11px 0;
  padding: 15px 20px;
  font-size: 15px;
}
.callout.warn { background: var(--madder-wash); border-left-color: var(--madder); }
.callout.ok { background: var(--leaf-wash); border-left-color: var(--leaf); }

/* ---------- the loop diagram ---------- */
.loop {
  display: flex; align-items: stretch; justify-content: center;
  gap: 0; flex-wrap: wrap;
  max-width: 900px; margin: 0 auto;
}
.loop-node {
  position: relative;
  flex: 1 1 180px;
  background: var(--cloth);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
  text-align: left;
}
.loop-node + .loop-node { margin-left: 34px; }
.loop-node + .loop-node::before {
  content: "";
  position: absolute; left: -26px; top: 50%;
  width: 18px; border-top: 2px dashed var(--edge-strong);
}
.loop-node + .loop-node::after {
  content: "";
  position: absolute; left: -12px; top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 7px; height: 7px;
  border-top: 2px dashed var(--edge-strong);
  border-right: 2px dashed var(--edge-strong);
}
.loop-no { font-family: var(--serif); font-style: italic; font-size: 13px; color: var(--ochre); }
.loop-node h3 { font-size: 16px; margin: 4px 0 5px; }
.loop-node p { margin: 0; font-size: 13px; color: var(--ink-soft); }

/* ---------- punch-card code blocks ---------- */
.code-card {
  position: relative;
  background: var(--cloth-deep);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.code-card::before {
  /* punched feed holes down the left edge */
  content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 17px;
  background-image: radial-gradient(circle at 8.5px 14px, var(--linen) 2.6px, transparent 3.2px);
  background-size: 17px 28px;
  background-repeat: repeat-y;
  opacity: .8;
  pointer-events: none;
}
.code-head {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 18px 10px 32px;
  border-bottom: 1px dashed var(--edge-strong);
  font-family: var(--mono); font-size: 12px; color: var(--ink-soft);
  letter-spacing: .04em;
}
.code-head .card-tag {
  font-size: 10px; font-weight: 700; letter-spacing: .14em;
  color: var(--ochre); text-transform: uppercase;
}
.code-card pre {
  margin: 0; padding: 16px 20px 18px 34px;
  overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.62;
}
.tok-kw  { color: var(--tok-kw); font-weight: 600; }
.tok-str { color: var(--tok-str); }
.tok-num { color: var(--tok-num); }
.tok-com { color: var(--tok-com); font-style: italic; }

/* ---------- compare table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--edge); border-radius: var(--radius); box-shadow: var(--shadow); background: var(--cloth); }
.cmp { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
.cmp th, .cmp td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--edge); }
.cmp thead th {
  font-family: var(--serif); font-size: 15px; font-weight: 650;
  border-bottom: 1px solid var(--edge-strong);
}
.cmp tbody tr:last-child td { border-bottom: none; }
.cmp td:first-child { color: var(--ink-soft); }
.cmp .yes { color: var(--leaf); font-weight: 600; }
.cmp .no  { color: var(--madder); }
.cmp .col-us { background: var(--indigo-wash); }
.cmp thead .col-us { box-shadow: inset 0 3px 0 var(--indigo); }

/* ---------- pattern book (use cases) ---------- */
.ptabs { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 30px; }
.ptab {
  font: inherit; font-size: 13.5px; font-weight: 600;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--edge);
  background: transparent; color: var(--ink-soft);
  cursor: pointer;
  transition: color .15s ease, background .15s ease, border-color .15s ease;
}
.ptab:hover { color: var(--ink); border-color: var(--edge-strong); }
.ptab:focus-visible { outline: 2px solid var(--indigo); outline-offset: 2px; }
.ptab[aria-selected="true"] {
  background: var(--indigo-wash); color: var(--indigo);
  border-color: transparent;
  box-shadow: inset 0 0 0 1px var(--indigo);
}

.pattern-panel {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 36px;
  align-items: start;
  animation: fade-in .25s ease-out;
}
.pattern-story h3 { font-size: clamp(21px, 2.6vw, 27px); margin-bottom: 14px; }
.pattern-story p { color: var(--ink-soft); font-size: 15.5px; margin: 0 0 14px; }
.pattern-story code { font-size: .82em; }
.loom-note {
  font-family: var(--serif); font-style: italic;
  border-left: 3px solid var(--ochre);
  padding-left: 14px;
}
.feat-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.feat-chips span {
  font-size: 11px; font-weight: 650; letter-spacing: .07em; text-transform: uppercase;
  color: var(--leaf);
  background: var(--leaf-wash);
  padding: 4px 11px; border-radius: 999px;
}

@media (max-width: 900px) {
  .pattern-panel { grid-template-columns: 1fr; gap: 24px; }
}

/* ---------- phase cloth ---------- */
.phases { max-width: 780px; margin: 0 auto; }
.phase {
  position: relative;
  display: flex; gap: 16px; align-items: flex-start;
  /* left padding keeps text clear of the absolutely-positioned state disc */
  padding: 0 0 26px 32px;
  margin-left: 15px;
  border-left: 2px solid var(--edge-strong);
}
.phase:last-child { border-left-color: transparent; padding-bottom: 0; }
.phase .state {
  position: absolute; left: -16px; top: 0;
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700;
  background: var(--cloth); border: 2px solid var(--edge-strong); color: var(--ink-soft);
}
.phase.done { border-left-style: solid; border-left-color: var(--leaf); }
.phase.done .state { background: var(--leaf); border-color: var(--leaf); color: var(--linen); }
.phase.next { border-left-style: dashed; border-left-color: var(--ochre); }
.phase.next .state { border-color: var(--ochre); color: var(--ochre); animation: breathe 2s ease-in-out infinite; }
@keyframes breathe { 0%, 100% { box-shadow: 0 0 0 0 var(--ochre-wash); } 50% { box-shadow: 0 0 0 6px var(--ochre-wash); } }
@media (prefers-reduced-motion: reduce) { .phase.next .state { animation: none; } }
.phase .label { font-family: var(--serif); font-weight: 650; font-size: 16.5px; }
.phase .desc { color: var(--ink-soft); font-size: 14px; margin-top: 2px; }

/* ---------- docs ---------- */
.docs { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 48px; padding: 48px 0 80px; }
.sidebar { position: sticky; top: 76px; align-self: start; max-height: calc(100vh - 96px); overflow-y: auto; }
.sidebar h4 {
  font-family: var(--sans); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .14em; color: var(--ochre);
  margin: 26px 0 8px;
}
.sidebar h4:first-child { margin-top: 0; }
.sidebar a {
  display: block; padding: 4px 10px; margin-left: -10px;
  font-size: 13.5px; color: var(--ink-soft); text-decoration: none;
  border-left: 2px solid transparent; border-radius: 0 7px 7px 0;
}
.sidebar a:hover { color: var(--ink); background: var(--cloth-deep); }
.sidebar a.active { color: var(--indigo); border-left-color: var(--indigo); background: var(--indigo-wash); font-weight: 600; }

.content { min-width: 0; }
.content h1 { font-size: clamp(30px, 4vw, 42px); }
.content h2 { font-size: 25px; margin: 52px 0 14px; scroll-margin-top: 84px; }
.content h3 { font-size: 19px; margin: 34px 0 10px; scroll-margin-top: 84px; }
.content p, .content ul, .content ol { margin: 12px 0; color: var(--ink); }
.content ul, .content ol { padding-left: 24px; }
.content li { margin: 5px 0; }
.content li::marker { color: var(--ochre); }
.content .lead { font-size: 17.5px; color: var(--ink-soft); max-width: 44em; }
.anchor { opacity: 0; margin-left: 8px; text-decoration: none; font-weight: 400; transition: opacity .15s ease; }
h2:hover .anchor, h3:hover .anchor { opacity: .55; }

.content table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 16px 0; background: var(--cloth); border: 1px solid var(--edge); border-radius: 11px; overflow: hidden; box-shadow: var(--shadow); }
.content thead th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-soft); padding: 10px 14px; border-bottom: 1px solid var(--edge-strong); background: var(--cloth-deep); }
.content td { padding: 10px 14px; border-bottom: 1px solid var(--edge); vertical-align: top; }
.content tbody tr:last-child td { border-bottom: none; }

.content pre[data-lang] {
  background: var(--cloth-deep);
  border: 1px solid var(--edge);
  border-radius: 11px;
  padding: 15px 18px;
  overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.6;
  margin: 16px 0;
  box-shadow: var(--shadow);
}

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--edge); background: var(--cloth-deep); }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding: 34px 26px; max-width: 1120px; margin: 0 auto; }
.footer-inner strong { font-family: var(--serif); font-size: 16px; }
.footer-inner > div:first-child { color: var(--ink-soft); font-size: 14px; }
.footer-links { display: flex; gap: 20px; align-items: center; }
.footer-links a { color: var(--ink-soft); font-size: 14px; text-decoration: none; }
.footer-links a:hover { color: var(--ink); }

.hide-sm { display: initial; }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-art { max-width: 520px; margin: 0 auto; }
  .docs { grid-template-columns: 1fr; gap: 20px; }
  .sidebar { position: static; max-height: none; columns: 2; column-gap: 30px; }
  .sidebar h4 { margin-top: 14px; break-after: avoid; }
  .sidebar a { break-inside: avoid; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 18px; }
  section { padding: 56px 0; }
  .hero { padding: 48px 0 60px; }
  .hide-sm { display: none; }
  .loop-node + .loop-node { margin-left: 0; margin-top: 26px; }
  .loop-node + .loop-node::before, .loop-node + .loop-node::after { display: none; }
  .sidebar { columns: 1; }
}