/* ======================================================
   DATASHEET: the shared design system for vondemo.pages.dev
   Same type, colors and rules as voncastro.pages.dev, plus a dark variant.
   Small grey labels are darker than the portfolio's so they pass WCAG AA.
   ====================================================== */

:root {
  --paper: #f7f7f4;
  --paper-tint: #e8eef0;
  --card: #ffffff;
  --ink: #1a1816;
  --ink-2: #4f4d48;
  --ink-3: #686459;
  --rule: #c9c5bc;
  --rule-strong: #9a968c;
  --accent: #b03d1c;
  --accent-dim: rgba(194, 65, 27, 0.08);
  --signal: #146a5f;
  --signal-soft: rgba(23, 111, 100, 0.1);
  --danger: #a3281a;
  --danger-soft: rgba(163, 40, 26, 0.08);
  --blueprint: #244e73;
  --grain-blend: multiply;
  --grain-opacity: 0.03;

  --font-display: "Instrument Serif", "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --max-w: 1200px;
  --gutter: clamp(16px, 5vw, 56px);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #141311;
    --paper-tint: #1b2023;
    --card: #1b1a17;
    --ink: #ecebe6;
    --ink-2: #c4c1b8;
    --ink-3: #a9a59b;
    --rule: #3b3934;
    --rule-strong: #67635b;
    --accent: #ec8a5f;
    --accent-dim: rgba(236, 138, 95, 0.12);
    --signal: #5cc2b2;
    --signal-soft: rgba(92, 194, 178, 0.12);
    --danger: #f08a7c;
    --danger-soft: rgba(240, 138, 124, 0.12);
    --blueprint: #8fb3d6;
    --grain-blend: screen;
    --grain-opacity: 0.025;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #141311;
  --paper-tint: #1b2023;
  --card: #1b1a17;
  --ink: #ecebe6;
  --ink-2: #c4c1b8;
  --ink-3: #a9a59b;
  --rule: #3b3934;
  --rule-strong: #67635b;
  --accent: #ec8a5f;
  --accent-dim: rgba(236, 138, 95, 0.12);
  --signal: #5cc2b2;
  --signal-soft: rgba(92, 194, 178, 0.12);
  --danger: #f08a7c;
  --danger-soft: rgba(240, 138, 124, 0.12);
  --blueprint: #8fb3d6;
  --grain-blend: screen;
  --grain-opacity: 0.025;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
  font-feature-settings: "ss01", "cv11", "tnum";
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  opacity: var(--grain-opacity);
  mix-blend-mode: var(--grain-blend);
}

::selection { background: var(--accent); color: var(--paper); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 1px; }

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 0.2s ease, border-color 0.2s ease;
}
a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.mono { font-family: var(--font-mono); font-size: 0.86em; letter-spacing: 0.02em; }
.label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.container { max-width: var(--max-w); width: 100%; margin: 0 auto; padding: 0 var(--gutter); min-width: 0; }
img, svg { max-width: 100%; }

.skip {
  position: absolute; left: -9999px;
  padding: 8px 14px;
  background: var(--ink); color: var(--paper);
  font-family: var(--font-mono); font-size: 12px;
}
.skip:focus { left: 16px; top: 16px; z-index: 200; border-bottom: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* ================= MASTHEAD ================= */
.masthead { padding: 28px 0 0; }

.doc-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.doc-meta strong { color: var(--ink); font-weight: 500; margin-right: 4px; }
.doc-meta a { border-bottom: none; }
.doc-meta a:hover { color: var(--accent); }

.theme-toggle {
  min-height: 32px;
  padding: 4px 10px;
  border: 1px solid var(--rule-strong);
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  cursor: pointer;
}
.theme-toggle:hover { border-color: var(--ink); color: var(--ink); }

.masthead-main { padding: 44px 0 36px; }

.kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.kicker::before { content: ''; width: 28px; height: 1px; background: var(--accent); flex: none; }

.doc-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(52px, 11vw, 108px);
  line-height: 0.95;
  color: var(--ink);
  overflow-wrap: break-word;
}
.doc-title em { font-style: italic; color: var(--accent); }

.doc-subtitle {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 12px 32px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.lede { margin-top: 28px; max-width: 760px; font-size: 19px; line-height: 1.62; color: var(--ink-2); }
.lede strong { color: var(--ink); font-weight: 600; }

.actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

.cta {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border: 1px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  line-height: 1.2;
  cursor: pointer;
}
.cta:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.cta.primary { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.cta.primary:hover { background: var(--ink); border-color: var(--ink); }
.cta[aria-disabled="true"] { border-style: dashed; border-color: var(--rule-strong); color: var(--ink-3); cursor: default; }
.cta[aria-disabled="true"]:hover { background: transparent; color: var(--ink-3); }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; padding: 0; list-style: none; }
.tag {
  padding: 5px 9px;
  border: 1px solid var(--rule);
  background: var(--accent-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* ================= ABSTRACT ================= */
.abstract { padding: 48px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.abstract p {
  font-family: var(--font-display);
  font-size: clamp(26px, 4.4vw, 34px);
  line-height: 1.25;
  color: var(--ink);
  max-width: 820px;
}
.abstract p em { color: var(--accent); }

/* ================= BODY LAYOUT ================= */
.doc-body { display: grid; grid-template-columns: 1fr; gap: 0; padding: 0 0 72px; }
.doc-main { min-width: 0; }
.doc-aside { padding-top: 36px; }
@media (min-width: 960px) {
  .doc-body { grid-template-columns: 200px 1fr; gap: 72px; }
  .doc-aside { position: sticky; top: 32px; align-self: start; max-height: calc(100vh - 64px); overflow-y: auto; padding: 48px 8px 32px 0; }
}
@media (max-width: 959px) { .doc-aside { display: none; } }

.index-title {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--rule);
}
.index-list { list-style: none; display: flex; flex-direction: column; }
.index-list a {
  display: flex; align-items: baseline; gap: 12px; padding: 7px 0; border: none;
  font-size: 13.5px; color: var(--ink-2);
}
.index-list a::before { content: attr(data-num); font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); min-width: 22px; }
.index-list a:hover, .index-list a.active, .index-list a.active::before { color: var(--accent); }

/* ================= SECTIONS ================= */
.section { padding: 56px 0; border-top: 1px solid var(--rule); }
.section:first-of-type { border-top: none; }
.section-header { display: grid; grid-template-columns: 1fr; gap: 12px; margin-bottom: 36px; }
@media (min-width: 640px) { .section-header { grid-template-columns: 64px 1fr; gap: 28px; } }
.section-num { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--accent); padding-top: 10px; }
.section-title { font-family: var(--font-display); font-weight: 400; font-size: clamp(36px, 6vw, 54px); line-height: 1; color: var(--ink); }
.section-desc { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--ink-3); text-transform: uppercase; margin-top: 10px; }

.body-text { font-size: 16px; line-height: 1.68; max-width: 640px; color: var(--ink-2); overflow-wrap: anywhere; }
.body-text + .body-text { margin-top: 14px; }
.body-text strong { color: var(--ink); font-weight: 600; }
h3.sub { font-family: var(--font-display); font-weight: 400; font-size: 28px; line-height: 1.15; margin: 32px 0 12px; }

/* ================= PARAMETERS (live numbers) ================= */
.params { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); }
@media (min-width: 720px) { .params { grid-template-columns: repeat(4, 1fr); } .params.three { grid-template-columns: repeat(3, 1fr); } }
.param { padding: 20px 18px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); min-width: 0; }
.params .param:nth-child(2n) { border-right: none; }
@media (min-width: 720px) {
  .params .param:nth-child(2n) { border-right: 1px solid var(--rule); }
  .params .param:nth-child(4n), .params.three .param:nth-child(3n) { border-right: none; }
}
.param-key { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 12px; }
.param-val { font-family: var(--font-display); font-size: clamp(38px, 7vw, 52px); line-height: 1; color: var(--ink); }
.param-val small { font-size: 0.42em; margin-left: 4px; color: var(--ink-2); font-family: var(--font-mono); letter-spacing: 0.04em; }
.param-unit { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); margin-top: 10px; letter-spacing: 0.03em; }

/* ================= OPS FEED ================= */
.feed-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px 16px; margin: 36px 0 12px; }
.feed-status { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); display: inline-flex; align-items: center; gap: 8px; }
.feed-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--rule-strong); }
.feed-status[data-state="live"] .dot { background: var(--signal); box-shadow: 0 0 0 3px var(--signal-soft); }
.feed-status[data-state="error"] .dot { background: var(--danger); }

.feed { list-style: none; border-top: 1px solid var(--ink); }
.feed-row { display: grid; grid-template-columns: 1fr auto; gap: 6px 16px; padding: 14px 0; border-bottom: 1px solid var(--rule); align-items: baseline; }
@media (min-width: 720px) { .feed-row { grid-template-columns: 150px 1fr auto; } }
.feed-demo { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.feed-outcome { font-size: 15px; color: var(--ink); min-width: 0; overflow-wrap: anywhere; grid-column: 1 / -1; }
@media (min-width: 720px) { .feed-outcome { grid-column: auto; } }
.feed-meta { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); white-space: nowrap; grid-row: 1; grid-column: 2; }
@media (min-width: 720px) { .feed-meta { grid-row: auto; grid-column: auto; } }
.feed-steps { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; list-style: none; }
.step-chip { font-family: var(--font-mono); font-size: 12px; padding: 2px 7px; border: 1px solid var(--rule); color: var(--ink-2); }
.step-chip[data-status="failed"] { border-color: var(--danger); color: var(--danger); background: var(--danger-soft); }
.step-chip[data-status="skipped"] { border-style: dashed; color: var(--ink-3); }
.badge { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; padding: 1px 6px; margin-right: 8px; }
.badge[data-status="success"] { color: var(--signal); background: var(--signal-soft); }
.badge[data-status="failed"] { color: var(--danger); background: var(--danger-soft); }
.badge[data-status="running"] { color: var(--blueprint); border: 1px solid currentColor; }

.empty {
  padding: 28px 18px;
  border: 1px dashed var(--rule-strong);
  border-top: none;
  font-size: 15px;
  color: var(--ink-2);
}

/* ================= LIST ROWS (case studies, kv) ================= */
.rows { list-style: none; border-top: 1px solid var(--ink); }
.row { display: grid; grid-template-columns: 1fr; gap: 6px 28px; padding: 22px 0; border-bottom: 1px solid var(--rule); }
@media (min-width: 720px) { .row { grid-template-columns: 110px 1fr 170px; align-items: baseline; } }
.row-ref { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; color: var(--accent); }
.row-title { font-family: var(--font-display); font-weight: 400; font-size: 30px; line-height: 1.1; }
.row-text { margin-top: 6px; font-size: 15px; color: var(--ink-2); max-width: 560px; }
.row-state { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.row-state a { color: var(--ink); }

.kv { border-top: 1px solid var(--ink); }
.kv-row { display: grid; grid-template-columns: 1fr; gap: 4px 24px; padding: 16px 0; border-bottom: 1px solid var(--rule); }
@media (min-width: 640px) { .kv-row { grid-template-columns: 180px 1fr; align-items: baseline; } }
.kv-key { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }
.kv-val { font-size: 15.5px; color: var(--ink-2); }
.kv-val strong { color: var(--ink); font-weight: 600; }

/* ================= FIGURES (video, diagram, screenshots) ================= */
.figure { margin: 0; position: relative; padding: 14px; border: 1px solid var(--rule); background: var(--paper); }
.figure::before {
  content: ''; position: absolute; inset: -5px; pointer-events: none;
  background:
    linear-gradient(var(--ink), var(--ink)) top left / 14px 1px no-repeat,
    linear-gradient(var(--ink), var(--ink)) top left / 1px 14px no-repeat,
    linear-gradient(var(--ink), var(--ink)) top right / 14px 1px no-repeat,
    linear-gradient(var(--ink), var(--ink)) top right / 1px 14px no-repeat,
    linear-gradient(var(--ink), var(--ink)) bottom left / 14px 1px no-repeat,
    linear-gradient(var(--ink), var(--ink)) bottom left / 1px 14px no-repeat,
    linear-gradient(var(--ink), var(--ink)) bottom right / 14px 1px no-repeat,
    linear-gradient(var(--ink), var(--ink)) bottom right / 1px 14px no-repeat;
}
.figlabel {
  position: absolute; top: -10px; left: 22px; padding: 0 10px; background: var(--paper);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); z-index: 1;
}
.figure figcaption { margin-top: 12px; font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
.figure img { display: block; width: 100%; height: auto; }

.video { position: relative; aspect-ratio: 16 / 9; background: var(--paper-tint); display: grid; place-items: center; overflow: hidden; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-play {
  position: absolute; inset: 0; width: 100%; height: 100%; border: 0; cursor: pointer;
  background: transparent center / cover no-repeat; display: grid; place-items: center;
}
.video-play span {
  padding: 12px 18px; background: var(--ink); color: var(--paper);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
}
.video-play:hover span, .video-play:focus-visible span { background: var(--accent); }
.video-pending { padding: 24px; text-align: center; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }

.placeholder-shot {
  aspect-ratio: 16 / 10; display: grid; place-items: center; padding: 16px; text-align: center;
  background: repeating-linear-gradient(135deg, var(--paper-tint) 0 12px, transparent 12px 24px);
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-2); letter-spacing: 0.04em;
}

/* Flow diagram: colors come from the theme, so it reads in light and dark. */
.flow { background: var(--paper-tint); padding: 20px; border: 1px solid var(--rule); }
.flow svg { display: block; width: 100%; height: auto; }
.flow .node rect { fill: var(--card); stroke: var(--ink); stroke-width: 1.2; }
.flow .node.trigger rect { stroke: var(--accent); stroke-width: 2; }
.flow .node.output rect { stroke: var(--signal); stroke-width: 2; }
.flow .node text { fill: var(--ink); font-family: var(--font-body); font-size: 15px; }
.flow .node text.k { fill: var(--ink-3); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; }
.flow .flow-h .node text { font-size: 21px; }
.flow .flow-h .node text.k { font-size: 14px; }
.flow .edge { stroke: var(--ink-2); stroke-width: 1.4; fill: none; }
.flow .arrow { fill: var(--ink-2); }
.flow .flow-v { display: block; max-width: 360px; margin: 0 auto; }
.flow .flow-h { display: none; }
@media (min-width: 760px) { .flow .flow-v { display: none; } .flow .flow-h { display: block; } }

/* ================= TABLE ================= */
.table-wrap { overflow-x: auto; border-top: 1px solid var(--ink); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 14px 12px 14px 0; border-bottom: 1px solid var(--rule); }
th { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; }
td { color: var(--ink-2); }
td:first-child { color: var(--ink); min-width: 140px; }

/* ================= TABS ================= */
.tablist { display: flex; flex-wrap: wrap; gap: 0; border-bottom: 1px solid var(--ink); }
.tab {
  min-height: 44px; padding: 10px 16px; border: 1px solid transparent; border-bottom: none; margin-bottom: -1px;
  background: transparent; color: var(--ink-2); cursor: pointer;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
}
.tab[aria-selected="true"] { border-color: var(--ink); background: var(--paper); color: var(--ink); }
.tab:hover { color: var(--accent); }
.tabpanel { padding: 24px 0 0; }
.tabpanel[hidden] { display: none; }
.tabpanel .grid-2 { display: grid; gap: 24px; }
@media (min-width: 820px) { .tabpanel .grid-2 { grid-template-columns: 1.2fr 1fr; } }

.notes { list-style: none; counter-reset: n; border-top: 1px solid var(--ink); }
.notes li { counter-increment: n; display: grid; grid-template-columns: 44px 1fr; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--rule); color: var(--ink-2); }
.notes li::before { content: counter(n, decimal-leading-zero); font-family: var(--font-mono); font-size: 12px; color: var(--accent); padding-top: 3px; }
.notes strong { color: var(--ink); font-weight: 600; }

.bullets { margin: 12px 0 0 18px; color: var(--ink-2); }
.bullets li { margin: 6px 0; }

/* ================= FOOTER ================= */
footer { padding: 48px 0 40px; border-top: 2px solid var(--ink); }
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px 32px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--ink-3); }
.foot ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 20px; }
.foot a { color: var(--ink-2); }

.note { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); margin-top: 14px; }
.placeholder { color: var(--ink-3); font-style: italic; }

.gap-24 { margin-top: 24px; }
.gap-28 { margin-top: 28px; }
.gap-32 { margin-top: 32px; }
.video-play { display: none; }
.video.ready .video-play { display: grid; }
.video.ready .video-pending { display: none; }