/* ABI Framework — GitHub Pages stylesheet.
   Single source of truth for the landing page and benchmark dashboard.
   No build step, no external dependencies. */

:root {
  color-scheme: light dark;

  --accent: #009688;
  --accent-soft: #4db6ac;
  --accent-deep: #00695c;

  --bg: #ffffff;
  --bg-alt: #f4f7f8;
  --surface: #ffffff;
  --surface-2: #f6f8fa;
  --fg: #14201f;
  --fg-muted: #55635f;
  --border: #dbe3e2;
  --shadow: 0 1px 2px rgb(16 32 30 / 6%), 0 8px 24px rgb(16 32 30 / 6%);

  --ok-fg: #00695c;
  --ok-bg: #d9f0ec;
  --partial-fg: #8a5a00;
  --partial-bg: #fdf0d5;
  --plan-fg: #4a5568;
  --plan-bg: #e8ecef;

  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 1080px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

:root[data-theme="dark"],
:root:not([data-theme="light"]) {
  --bg: #0d1417;
  --bg-alt: #101a1e;
  --surface: #131e22;
  --surface-2: #182529;
  --fg: #e7f0ee;
  --fg-muted: #93a5a2;
  --border: #24343a;
  --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 12px 32px rgb(0 0 0 / 28%);

  --accent: #4db6ac;
  --accent-soft: #80cbc4;
  --accent-deep: #26a69a;

  --ok-fg: #7fd8cb;
  --ok-bg: #10312e;
  --partial-fg: #e8c07d;
  --partial-bg: #33280f;
  --plan-fg: #a8b8bd;
  --plan-bg: #1d2b30;
}

/* Light stays light when the system prefers light and no explicit choice was made. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #ffffff;
    --bg-alt: #f4f7f8;
    --surface: #ffffff;
    --surface-2: #f6f8fa;
    --fg: #14201f;
    --fg-muted: #55635f;
    --border: #dbe3e2;
    --shadow: 0 1px 2px rgb(16 32 30 / 6%), 0 8px 24px rgb(16 32 30 / 6%);
    --accent: #009688;
    --accent-soft: #4db6ac;
    --accent-deep: #00695c;
    --ok-fg: #00695c;
    --ok-bg: #d9f0ec;
    --partial-fg: #8a5a00;
    --partial-bg: #fdf0d5;
    --plan-fg: #4a5568;
    --plan-bg: #e8ecef;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

code, kbd, pre, samp { font-family: var(--mono); }
/* Inline code must be breakable — a long path should wrap, not widen the page.
   Code inside <pre> keeps its lines intact and scrolls instead. */
:not(pre) > code { overflow-wrap: anywhere; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.02em; margin: 0; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #04100e;
  padding: 0.6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem 1rem;
  min-height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 650;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  display: grid;
  place-items: center;
  color: #04100e;
  font-size: 0.72rem;
  font-weight: 800;
  font-family: var(--mono);
}
.brand .tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.05rem 0.5rem;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a { white-space: nowrap; }
.site-nav a {
  color: var(--fg-muted);
  font-size: 0.92rem;
  font-weight: 550;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
}
.site-nav a:hover { color: var(--fg); background: var(--surface-2); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--fg); background: var(--surface-2); }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg-muted);
  cursor: pointer;
}
.icon-btn:hover { color: var(--fg); border-color: var(--accent-soft); }
.icon-btn svg { width: 17px; height: 17px; }
:root[data-theme="dark"] .icon-btn .i-sun,
:root:not([data-theme="light"]) .icon-btn .i-sun { display: none; }
:root[data-theme="dark"] .icon-btn .i-moon,
:root:not([data-theme="light"]) .icon-btn .i-moon { display: block; }
.icon-btn .i-moon { display: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .icon-btn .i-sun { display: block; }
  :root:not([data-theme="dark"]) .icon-btn .i-moon { display: none; }
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(60rem 26rem at 12% -12%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
    radial-gradient(48rem 24rem at 92% 0%, color-mix(in srgb, var(--accent-deep) 14%, transparent), transparent 72%),
    var(--bg-alt);
}
.hero .wrap { padding-top: 4.5rem; padding-bottom: 4rem; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-deep);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
}
:root[data-theme="dark"] .eyebrow,
:root:not([data-theme="light"]) .eyebrow { color: var(--accent-soft); }

.hero h1 {
  margin: 1.1rem 0 0;
  font-size: clamp(2.1rem, 5.2vw, 3.4rem);
  font-weight: 700;
}
.hero .lede {
  margin: 1rem 0 0;
  max-width: 60ch;
  font-size: clamp(1.02rem, 1.9vw, 1.18rem);
  color: var(--fg-muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.8rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 1.05rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #04100e; }
.btn-primary:hover { background: var(--accent-deep); color: #f2fffd; }
:root[data-theme="dark"] .btn-primary:hover,
:root:not([data-theme="light"]) .btn-primary:hover { background: var(--accent-soft); color: #04100e; }
.btn-ghost { background: var(--surface); color: var(--fg); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent-soft); }

/* ---------- sections ---------- */

section { padding: 3.5rem 0; }
section.alt { background: var(--bg-alt); border-block: 1px solid var(--border); }

.section-head { max-width: 62ch; margin-bottom: 2rem; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 680; }
.section-head p { margin: 0.6rem 0 0; color: var(--fg-muted); }

.grid { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(268px, 100%), 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); }
/* Grid and flex children default to min-width:auto, which lets a long code line
   push the whole page wider than the viewport instead of scrolling in place. */
.grid > *, .stat-row > * { min-width: 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.card h3 { font-size: 1.02rem; font-weight: 650; display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.card h3 code { overflow-wrap: anywhere; }
.card p { margin: 0.55rem 0 0; color: var(--fg-muted); font-size: 0.94rem; }
.card ul { margin: 0.7rem 0 0; padding-left: 1.1rem; color: var(--fg-muted); font-size: 0.92rem; }
.card li + li { margin-top: 0.25rem; }

.pill {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.14rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}
.pill-current { color: var(--ok-fg); background: var(--ok-bg); }
.pill-partial { color: var(--partial-fg); background: var(--partial-bg); }
.pill-planned { color: var(--plan-fg); background: var(--plan-bg); }

/* ---------- code blocks ---------- */

.code {
  position: relative;
  min-width: 0;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.code-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--fg-muted);
  font-family: var(--mono);
}
.code pre {
  margin: 0;
  padding: 0.95rem 1rem;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.65;
}
.code .cmt { color: var(--fg-muted); }
.code .cmd { color: var(--accent); }
.copy-btn {
  margin-left: auto;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg-muted);
  font-size: 0.75rem;
  font-family: var(--sans);
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--fg); border-color: var(--accent-soft); }

/* ---------- callout ---------- */

.callout {
  border: 1px solid color-mix(in srgb, var(--accent) 34%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  border-left-width: 4px;
  border-left-color: var(--accent);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
}
.callout h3 { font-size: 1rem; font-weight: 680; }
.callout p { margin: 0.5rem 0 0; color: var(--fg-muted); font-size: 0.94rem; }
.callout p:first-of-type { margin-top: 0.5rem; }

/* ---------- surface lists ---------- */

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.9rem; }
.chip {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.16rem 0.45rem;
}

/* ---------- dashboard ---------- */

.stat-row { display: grid; gap: 0.85rem; grid-template-columns: repeat(auto-fit, minmax(min(152px, 100%), 1fr)); }
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}
.stat .label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--fg-muted); font-weight: 650; }
.stat .value { font-family: var(--mono); font-size: 1.6rem; font-weight: 600; margin-top: 0.3rem; }
.stat .unit { font-size: 0.9rem; color: var(--fg-muted); margin-left: 0.15rem; }
.stat .delta { font-size: 0.82rem; color: var(--fg-muted); margin-top: 0.2rem; }

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem 1rem;
  box-shadow: var(--shadow);
}
.chart-card header { display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 0.4rem; }
.chart-card h3 { font-size: 1rem; font-weight: 650; }
.chart-card .hint { font-size: 0.84rem; color: var(--fg-muted); }
.chart-figure { margin: 0; }
.chart-figure svg { display: block; width: 100%; height: auto; overflow: visible; }

.legend { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 0.6rem; font-size: 0.84rem; color: var(--fg-muted); }
.legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend i { width: 12px; height: 3px; border-radius: 2px; display: inline-block; }

.axis-line { stroke: var(--border); stroke-width: 1; }
.grid-line { stroke: var(--border); stroke-width: 1; stroke-dasharray: 3 4; opacity: 0.75; }
/* font-size is set per chart in charts.js: the SVG scales with the container,
   so the value has to follow the viewBox it was drawn in. */
.axis-text { fill: var(--fg-muted); font-family: var(--mono); }
.series-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.series-dot { stroke: var(--surface); stroke-width: 1.5; }
.series-area { stroke: none; opacity: 0.12; }
.bar { rx: 3; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  font-family: var(--mono);
}
table.data caption {
  text-align: left;
  font-family: var(--sans);
  color: var(--fg-muted);
  font-size: 0.86rem;
  padding-bottom: 0.6rem;
}
table.data th, table.data td { padding: 0.45rem 0.7rem; text-align: right; border-bottom: 1px solid var(--border); }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data thead th { color: var(--fg-muted); font-weight: 650; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }
table.data tbody tr:last-child td { border-bottom: none; }
.table-scroll { overflow-x: auto; }

details.raw { margin-top: 1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
details.raw > summary {
  cursor: pointer;
  padding: 0.8rem 1.1rem;
  font-weight: 600;
  font-size: 0.92rem;
  list-style: none;
}
details.raw > summary::-webkit-details-marker { display: none; }
details.raw > summary::before { content: "▸"; color: var(--fg-muted); margin-right: 0.5rem; }
details.raw[open] > summary::before { content: "▾"; }
details.raw > div { padding: 0 1.1rem 1.1rem; }

.status-msg {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--fg-muted);
  padding: 1rem 1.15rem;
  font-size: 0.92rem;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 2.5rem 0;
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.footer-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.footer-grid h4 { margin: 0 0 0.5rem; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--fg); }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li + li { margin-top: 0.3rem; }
.footer-bottom { margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid var(--border); display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ---------- 404 ---------- */

.center-page { display: grid; place-items: center; min-height: 62vh; text-align: center; }
.center-page h1 { font-size: clamp(2rem, 6vw, 3rem); }
.center-page p { color: var(--fg-muted); max-width: 46ch; margin: 0.8rem auto 0; }

/* Below this width the links no longer fit beside the wordmark, so the nav
   drops to its own row and scrolls sideways instead of wrapping into a stack. */
@media (max-width: 900px) {
  .site-header .wrap { flex-wrap: wrap; padding-block: 0.5rem; }
  .brand { margin-right: auto; }
  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 0.15rem;
  }
  .site-nav::-webkit-scrollbar { display: none; }
}

@media (max-width: 640px) {
  .site-nav a { padding: 0.3rem 0.45rem; font-size: 0.86rem; }
  .brand .tag { display: none; }
  section { padding: 2.75rem 0; }
  .hero .wrap { padding-top: 3rem; padding-bottom: 2.75rem; }
  .stat .value { font-size: 1.45rem; }
  .chart-card { padding: 1rem 0.9rem 0.85rem; }
}