/* ===========================================================================
   franken_ocr — franken-ocr.com
   Hand-written design system. No framework, no build step, no CDN.
   Self-hosted variable fonts (Inter + JetBrains Mono, both SIL OFL 1.1).
   =========================================================================== */

@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191,
    U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191,
    U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ------------------------------------------------------------------ tokens */
:root {
  /* Surfaces: near-black with a faint green cast, so emerald reads as light
     rather than as paint. */
  --bg: #060b09;
  --bg-deep: #030706;
  --surface: rgba(255, 255, 255, 0.022);
  --surface-strong: rgba(3, 7, 6, 0.72);
  --inset: rgba(2, 6, 5, 0.66);

  /* Ink */
  --fg: #e8eef2;
  --fg-mid: #cbd5e1;
  --fg-dim: #94a3b8;
  /* #64748b measured 4.16:1 on this background — below AA for body text.
     #748496 is 5.18:1 and still reads as the quietest voice on the page. */
  --fg-faint: #748496;

  /* Semantics — fixed meanings, used identically in CSS and in every viz. */
  --accent: #34d399;   /* active / ours / success */
  --accent-deep: #059669;
  --accent-ink: #04140d;
  --amber: #fbbf24;    /* warning / threshold / "here is the tail" */
  --red: #f87171;      /* failure / skipped / refused */
  --ref: #7e8e9f;      /* the reference we are measured against */
  --violet: #a78bfa;   /* structure / shapes / metadata */

  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(52, 211, 153, 0.26);

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo,
    Consolas, monospace;

  --r-sm: 8px;
  --r: 12px;
  --r-lg: 18px;
  --r-pill: 9999px;

  --shadow: 0 14px 44px rgba(0, 0, 0, 0.45);
  --glow: 0 0 30px rgba(16, 185, 129, 0.09);

  --wrap: 1180px;
  --header-h: 68px;
}

* { box-sizing: border-box; }

/* app.js drives the whole playground with the `hidden` attribute, and several
   elements below are given an explicit `display` (grid/inline-flex). A later
   display rule beats the UA's `[hidden] { display: none }`, so without this the
   consent box, the progress bar, the cancel button and the empty result panel
   would all be permanently on screen. This line is load-bearing. */
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  /* Orbs and wide viz frames must never widen the document. */
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--fg);
  font: 400 16px/1.65 var(--sans);
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
}

/* A steady base wash so the page never looks like a flat rectangle even with
   JS off — the orbs below are decoration on top of this, not instead of it. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 12% -6%, rgba(16, 185, 129, 0.13), transparent 68%),
    radial-gradient(900px 700px at 96% 22%, rgba(4, 66, 37, 0.34), transparent 70%),
    radial-gradient(760px 560px at 40% 108%, rgba(251, 191, 36, 0.05), transparent 70%);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible {
  outline: 2px solid rgba(52, 211, 153, 0.75);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: rgba(52, 211, 153, 0.28); color: #fff; }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--inset);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.08em 0.34em;
  color: var(--fg-mid);
}
pre code { background: none; border: 0; padding: 0; }

h1, h2, h3 { font-weight: 800; letter-spacing: -0.02em; margin: 0; }

/* Spacing utilities — the only two the page needs. */
.mt { margin-top: 1.5rem; }
.viz-intro { margin: 0.9rem 0 1.5rem; }
.viz-foot { margin-top: 1.3rem; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
  padding: 0.7rem 1.2rem;
  border-radius: 0 0 var(--r) 0;
}
.skip-link:focus { left: 0; text-decoration: 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;
}

/* ------------------------------------------------------------------ header */
.top {
  position: fixed;
  top: 0.7rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  width: min(96%, var(--wrap));
  height: var(--header-h);
  padding: 0 0.75rem 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease,
    backdrop-filter 0.35s ease;
}
.top.stuck {
  background: rgba(3, 7, 6, 0.76);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-color: rgba(52, 211, 153, 0.2);
  box-shadow: var(--shadow), var(--glow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--fg);
  flex: 0 0 auto;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  position: relative;
  width: 38px; height: 38px;
  flex: 0 0 38px;
  border-radius: 11px;
  background: linear-gradient(140deg, #04351f, #34d399);
  display: grid; place-items: center;
  font: 800 19px/1 var(--mono);
  color: #04140d;
  box-shadow: 0 0 22px rgba(16, 185, 129, 0.28);
}
/* Two stitched studs — the family mark. */
.brand-mark::before, .brand-mark::after {
  content: "";
  position: absolute;
  width: 11px; height: 11px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    linear-gradient(45deg, transparent 43%, #0f172a 43%, #0f172a 57%, transparent 57%),
    linear-gradient(-45deg, transparent 43%, #0f172a 43%, #0f172a 57%, transparent 57%),
    radial-gradient(circle at 34% 30%, #64748b, #020617 72%);
}
.brand-mark::before { left: -4px; top: -4px; }
.brand-mark::after { right: -4px; bottom: -4px; }
.brand-text { line-height: 1.1; }
.brand-name { font: 800 15px/1 var(--mono); letter-spacing: -0.01em; }
.brand-tag {
  margin-top: 4px;
  font: 800 8px/1 var(--sans);
  letter-spacing: 0.22em;
  color: #10b981;
  text-transform: uppercase;
}

.top nav { display: none; gap: 0.1rem; align-items: center; }
.top nav a {
  padding: 0.5rem 0.7rem;
  border-radius: var(--r-pill);
  font: 800 10px/1 var(--sans);
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--fg-dim);
  transition: color 0.18s, background 0.18s;
}
.top nav a:hover { color: var(--accent); background: rgba(16, 185, 129, 0.1); text-decoration: none; }
.top nav a[aria-current="true"] { color: var(--accent); background: rgba(16, 185, 129, 0.13); }
@media (min-width: 1024px) { .top nav { display: flex; } }

/* -------------------------------------------------------------- primitives */
.wrap { width: min(100% - 2rem, var(--wrap)); margin-inline: auto; }
.wrap-narrow { width: min(100% - 2rem, 780px); margin-inline: auto; }

section { padding: 5rem 0; scroll-margin-top: 96px; position: relative; }
section:first-of-type { padding-top: 0; }
/* A hairline rule between sections: the page is one long dark column, and
   without a beat every panel edge reads as the same weight. */
main section + section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100% - 2rem, var(--wrap));
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 22%, var(--line) 78%, transparent);
}
footer { scroll-margin-top: 92px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font: 800 10px/1 var(--sans);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #10b981;
  margin-bottom: 1rem;
}
.eyebrow::before, .eyebrow::after {
  content: "";
  height: 1px; width: 30px;
  background: rgba(52, 211, 153, 0.4);
}

.section-head { text-align: center; margin-bottom: 3rem; }
.section-head h2 {
  font-size: clamp(2rem, 5.2vw, 3.4rem);
  line-height: 1.06;
  margin-bottom: 1.1rem;
}
.section-head h2 em { color: var(--accent); font-style: normal; }
.section-head .lede {
  color: var(--fg-dim);
  font-size: clamp(1rem, 1.6vw, 1.09rem);
  max-width: 46rem;
  margin: 0 auto;
}
.section-head .lede strong { color: var(--fg-mid); font-weight: 600; }

.note { color: var(--fg-dim); font-size: 0.95rem; line-height: 1.68; margin: 0; }
.note + .note { margin-top: 0.85rem; }
.note strong { color: var(--fg-mid); font-weight: 600; }
.note em { color: var(--fg-mid); font-style: italic; }
.micro { color: var(--fg-faint); font-size: 0.82rem; line-height: 1.6; margin: 0; }
.mono { font-family: var(--mono); }
.hl { color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid rgba(52, 211, 153, 0.2);
  border-radius: var(--r-pill);
  background: rgba(16, 185, 129, 0.05);
  color: var(--fg-dim);
  font: 700 0.74rem/1 var(--mono);
  padding: 0.42rem 0.85rem;
}
.chip b { color: var(--accent); font-weight: 800; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.025);
  color: var(--fg-dim);
  font: 800 0.76rem/1 var(--sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.68rem 1.2rem;
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.2s;
}
.btn:hover { color: var(--accent); border-color: rgba(52, 211, 153, 0.42); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.38; cursor: not-allowed; }
.btn:disabled:hover { color: var(--fg-dim); border-color: rgba(255, 255, 255, 0.1); }
.btn.primary {
  background: linear-gradient(135deg, #04351f, var(--accent-deep));
  border-color: rgba(52, 211, 153, 0.38);
  color: #eafff5;
}
.btn.primary:hover { color: #fff; border-color: var(--accent); }
.btn.subtle {
  background: transparent;
  border-color: transparent;
  color: var(--fg-faint);
  padding-inline: 0.6rem;
  text-transform: none;
  letter-spacing: 0.01em;
  font-weight: 600;
}
.btn.subtle:hover { color: var(--accent); background: rgba(16, 185, 129, 0.07); }
.btn.danger { border-color: rgba(248, 113, 113, 0.32); color: var(--red); }
.btn.danger:hover { color: var(--red); border-color: rgba(248, 113, 113, 0.6); background: rgba(248, 113, 113, 0.06); }

select.btn {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 600;
  font-size: 0.86rem;
  font-family: var(--sans);
  color: var(--fg-mid);
  border-radius: var(--r);
  padding-right: 2.1rem;
  max-width: 100%;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--fg-dim) 50%),
    linear-gradient(135deg, var(--fg-dim) 50%, transparent 50%);
  background-position: right 1.1rem top 52%, right 0.75rem top 52%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
select.btn option { background: #0b1512; color: var(--fg); }
@media (max-width: 560px) {
  /* The model names are long; on a phone the select owns its own line. */
  select.btn { flex: 1 1 100%; width: 100%; }
  .row > .btn { flex: 1 1 auto; }
}

/* Panels — the recurring surface for every visualization and the playground. */
.panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface-strong);
  padding: clamp(1.1rem, 2.6vw, 2rem);
}
.panel::before, .panel::after {
  content: "";
  position: absolute;
  width: 13px; height: 13px;
  border-radius: 50%;
  z-index: 3;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 9px rgba(16, 185, 129, 0.22);
  background:
    linear-gradient(45deg, transparent 43%, #1e293b 43%, #1e293b 57%, transparent 57%),
    linear-gradient(-45deg, transparent 43%, #1e293b 43%, #1e293b 57%, transparent 57%),
    radial-gradient(circle at 34% 30%, #475569, #0b1220 72%);
}
.panel::before { left: -6px; top: -6px; }
.panel::after { right: -6px; bottom: -6px; }

.card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface-strong);
  padding: 1.5rem;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(52, 211, 153, 0.28);
  box-shadow: var(--shadow), var(--glow);
}
.card.accent { border-color: rgba(52, 211, 153, 0.26); box-shadow: inset 0 0 46px rgba(16, 185, 129, 0.06); }
.card-num {
  position: absolute;
  top: 0.2rem; right: 0.8rem;
  font: 800 2.7rem/1 var(--mono);
  color: rgba(52, 211, 153, 0.1);
  pointer-events: none;
}
.card h3 { font-size: 1.02rem; margin-bottom: 0.6rem; color: var(--fg); }
.card.stat-card { text-align: center; display: grid; align-content: start; }
.card.stat-card .label { margin-bottom: 0.7rem; }

.label {
  font: 800 0.68rem/1 var(--sans);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #10b981;
}
.label + * { margin-top: 0.8rem; }

.grid { display: grid; gap: 1.2rem; }
.grid > * { min-width: 0; }
.grid-2, .grid-3 { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 680px) { .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 940px) { .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

.stack { display: grid; gap: 1.2rem; }
.stack > * { min-width: 0; }
.row { display: flex; align-items: center; gap: 0.7rem; flex-wrap: wrap; min-width: 0; }
.row > * { min-width: 0; }
.row.spread { justify-content: space-between; }

/* Scroll reveals — the no-JS/no-motion fallback is "fully visible". */
.reveal { opacity: 1; }
html.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.8, 0.2, 1),
    transform 0.7s cubic-bezier(0.22, 0.8, 0.2, 1);
}
html.js .reveal.revealed { opacity: 1; transform: none; }

/* --------------------------------------------------------------------- hero */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 4.5rem) 0 3rem;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2.5rem, 7.4vw, 5.1rem);
  line-height: 1.02;
  margin-bottom: 1.4rem;
}
.hero h1 em { color: var(--accent); font-style: normal; }
.hero .lede {
  color: var(--fg-dim);
  font-size: clamp(1rem, 1.7vw, 1.14rem);
  max-width: 44rem;
  margin: 0 auto 1.9rem;
}
.hero .lede strong { color: var(--fg-mid); font-weight: 600; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.7rem; justify-content: center; margin-bottom: 1.8rem; }
.hero-cta .btn { padding: 0.85rem 1.6rem; font-size: 0.8rem; }
.hero-art {
  position: relative;
  margin: 2.6rem auto 0;
  max-width: 760px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(52, 211, 153, 0.13);
  overflow: hidden;
  box-shadow: 0 0 70px rgba(16, 185, 129, 0.13);
}
.hero-art img { display: block; width: 100%; height: auto; }

/* --------------------------------------------------------------- playground */
.pg {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 1000px) { .pg { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.pg-col { display: grid; gap: 1.1rem; align-content: start; min-width: 0; }
.pg-step { display: grid; gap: 0.75rem; min-width: 0; }

.kv { color: var(--fg-dim); font-size: 0.83rem; font-family: var(--mono); }
.kv code { color: var(--accent); background: none; border: 0; padding: 0; }

.status {
  font: 600 0.88rem/1.5 var(--mono);
  color: var(--fg-dim);
  border-left: 2px solid var(--line);
  padding: 0.15rem 0 0.15rem 0.7rem;
  overflow-wrap: anywhere;
}
.status.ok { color: var(--accent); border-left-color: var(--accent); }
.status.warn { color: var(--amber); border-left-color: var(--amber); }
.status.err { color: var(--red); border-left-color: var(--red); }

.consent {
  border: 1px solid rgba(251, 191, 36, 0.4);
  background: rgba(251, 191, 36, 0.05);
  border-radius: var(--r);
  padding: 1rem 1.1rem;
  display: grid;
  gap: 0.85rem;
  justify-items: start;
}
.consent p { margin: 0; color: var(--fg-mid); font-size: 0.92rem; line-height: 1.6; }

.progress {
  height: 9px;
  border-radius: 6px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
}
#progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent));
  transition: width 0.25s ease;
}

.drop {
  border: 2px dashed rgba(255, 255, 255, 0.13);
  border-radius: var(--r);
  min-height: 9.5rem;
  padding: 1.1rem;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--fg-dim);
  font-size: 0.92rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.drop:hover { border-color: rgba(52, 211, 153, 0.38); }
.drop.armed { border-color: rgba(52, 211, 153, 0.42); }
.drop.over { border-color: var(--accent); background: rgba(52, 211, 153, 0.07); }
#drop-hint { display: block; max-width: 30rem; }
.preview-stack { position: relative; max-width: 100%; line-height: 0; }
.preview-stack img { max-width: 100%; height: auto; display: block; border-radius: var(--r-sm); }
.preview-stack canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

.output {
  background: var(--inset);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 1rem;
  margin: 0;
  max-height: 24rem;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--fg-mid);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.warnings { color: var(--amber); font-size: 0.83rem; margin: 0; padding-left: 1.15rem; display: grid; gap: 0.3rem; }
.warnings:empty { display: none; }
#license { font-size: 0.76rem; color: var(--fg-faint); font-family: var(--mono); }
#result-wrap { display: grid; gap: 0.9rem; }
/* The placeholder explains what will appear in the empty right-hand column, and
   retires itself the moment app.js unhides the real result. */
.pg-col:has(#result-wrap:not([hidden])) #result-placeholder { display: none; }
#progress-wrap { display: grid; gap: 0.5rem; }

.legend { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.8rem; color: var(--fg-dim); }
.legend span { display: inline-flex; align-items: center; gap: 0.42rem; }
.legend i {
  width: 11px; height: 11px; border-radius: 3px; display: inline-block;
  border: 1.5px solid currentColor;
}
.legend .sw-ok { color: var(--accent); }
.legend .sw-skip { color: var(--red); }
.legend .sw-warn { color: var(--amber); }

/* ------------------------------------------------------------ visualizations */
/* Wide diagrams scroll inside their own box rather than widening the page. The
   right-edge fade is the affordance that says so on a phone, where there is no
   scrollbar to see. */
.viz-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.viz-wide {
  position: relative;
  -webkit-mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 34px), transparent 100%);
  mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 34px), transparent 100%);
}
@media (min-width: 1100px) {
  /* At full width nothing is clipped, so the fade would be a lie. */
  .viz-wide { -webkit-mask-image: none; mask-image: none; }
}
.viz-scroll > svg { display: block; width: 100%; height: auto; }
.viz-wide > svg { min-width: 720px; }
.viz-caption { color: var(--fg-dim); font-size: 0.86rem; text-align: center; margin: 1rem auto 0; max-width: 46rem; }

.viz-controls {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 1.1rem;
}
.slider { flex: 1 1 200px; min-width: 170px; accent-color: var(--accent); height: 1.6rem; cursor: pointer; }
.readout { display: flex; align-items: baseline; gap: 0.5rem; white-space: nowrap; }
.readout-big { font: 800 1.7rem/1 var(--mono); color: var(--accent); }
.readout-dim { color: var(--fg-faint); font: 700 0.95rem/1 var(--mono); }

/* Stage / step chrome shared by the pipeline and walls steppers */
.step-head { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.step-count { font: 700 0.82rem/1 var(--mono); color: var(--fg-faint); }
.step-title { font: 800 1.25rem/1.2 var(--sans); color: var(--fg); }
.step-stat { font: 700 0.9rem/1 var(--mono); color: var(--accent); margin-left: auto; }
.step-body { min-height: 11.5em; }
.stepper .step-body { min-height: 7.5em; }
.step-row { display: flex; gap: 0.9rem; margin-bottom: 0.85rem; align-items: baseline; }
.step-row:last-child { margin-bottom: 0; }
.step-kind {
  flex: 0 0 6.4rem;
  text-align: right;
  font: 800 0.66rem/1.5 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.step-kind.wall { color: var(--red); }
.step-kind.why { color: var(--amber); }
.step-kind.fix { color: var(--accent); }
.step-nav { display: flex; align-items: center; gap: 0.8rem; margin-top: 0.4rem; }
.step-dots { display: flex; gap: 0.45rem; margin: 0 auto; }
.step-dot {
  width: 26px; height: 26px; padding: 0;
  border: 0; background: none; cursor: pointer;
  display: grid; place-items: center;
}
.step-dot::after {
  content: "";
  width: 11px; height: 11px;
  border-radius: 50%;
  border: 1px solid rgba(52, 211, 153, 0.45);
  transition: background 0.2s, transform 0.2s;
}
.step-dot[aria-current="true"]::after { background: var(--accent); transform: scale(1.18); }
.step-dot:hover::after { background: rgba(52, 211, 153, 0.4); }

/* Bar charts (byte budget, CER, parity) */
.bars { display: grid; gap: 0.55rem; }
/* A reference bar and its measured partner read as one unit. */
.bar-pair { display: grid; gap: 0.3rem; margin-bottom: 0.85rem; }
.bar-pair:last-child { margin-bottom: 0; }
.bar-row { display: flex; align-items: center; gap: 0.85rem; }
.bar-name {
  flex: 0 0 8.5rem;
  text-align: right;
  color: var(--fg-dim);
  font: 700 0.78rem/1.35 var(--mono);
  overflow-wrap: anywhere;
}
.bar-track {
  position: relative;
  flex: 1 1 auto;
  min-width: 60px;
  height: 15px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0;
  border-radius: 7px 0 0 7px;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent));
}
.bar-fill.ref { background: linear-gradient(90deg, #334155, var(--ref)); }
.bar-fill.amber { background: linear-gradient(90deg, #b45309, var(--amber)); }
.bar-val {
  flex: 0 0 6.4rem;
  color: var(--fg-mid);
  font: 700 0.78rem/1.35 var(--mono);
}
.bar-val small { color: var(--fg-faint); font-weight: 500; }
/* An exact zero: an empty track with a start tick, so "we measured it and it
   was nothing" looks different from "we measured it and it was very small". */
.bar-track.is-zero::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: rgba(52, 211, 153, 0.55);
}

.stat { font: 800 clamp(2.1rem, 5vw, 2.9rem)/1.08 var(--mono); color: var(--accent); margin-bottom: 0.45rem; }
.stat-dim { color: var(--fg-faint); font-size: 0.55em; font-weight: 700; }

/* ------------------------------------------------------------------- tables */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--r); }
@media (max-width: 760px) {
  /* Same affordance as the wide diagrams: a fading right edge is the only
     "there is more over here" signal a phone gets. */
  .table-scroll {
    -webkit-mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 30px), transparent 100%);
    mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 30px), transparent 100%);
  }
}
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; min-width: 460px; }
#models table { min-width: 680px; }
caption { text-align: left; color: var(--fg-faint); font-size: 0.8rem; padding-bottom: 0.8rem; line-height: 1.5; }
th, td { text-align: left; padding: 0.72rem 0.8rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th {
  color: #10b981;
  font: 800 0.66rem/1.4 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-bottom-color: rgba(52, 211, 153, 0.24);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: rgba(255, 255, 255, 0.018); }
td strong { color: var(--fg); }
td.num { font-family: var(--mono); font-size: 0.82rem; white-space: nowrap; }
.yes { color: var(--accent); font-weight: 700; }
.no { color: var(--fg-faint); }
.bad { color: var(--red); font-weight: 600; }

/* --------------------------------------------------------------------- code */
pre.code {
  background: var(--inset);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 1.2rem 1.3rem;
  margin: 0;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.83rem;
  line-height: 1.85;
  color: var(--fg-mid);
  text-align: left;
}
pre.code .c { color: var(--fg-faint); }

/* ------------------------------------------------------------------- footer */
footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 3rem 0 4rem;
}
.footer-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; }
@media (min-width: 780px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-head {
  font: 800 0.68rem/1 var(--sans);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #10b981;
  margin-bottom: 0.9rem;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.footer-grid li { font-size: 0.87rem; color: var(--fg-dim); }
.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--fg-faint);
  font-size: 0.8rem;
  line-height: 1.7;
}

/* ------------------------------------------------------- motion preferences */
@media (pointer: coarse) {
  /* 44px minimum touch target on anything tappable. */
  .btn { min-height: 44px; }
  .step-dot { width: 44px; height: 44px; }
  .top nav a { min-height: 44px; display: inline-flex; align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  html.js .reveal { opacity: 1; transform: none; }
  .card:hover { transform: none; }
}

/* --------------------------------------------------------------- small screens */
@media (max-width: 560px) {
  /* The decorative rules either side of an eyebrow push a long one onto three
     ragged lines on a phone. The words are the content; the rules are not. */
  .eyebrow::before, .eyebrow::after { display: none; }
  .eyebrow { gap: 0; }
}

@media (max-width: 640px) {
  :root { --header-h: 60px; }
  section { padding: 3.2rem 0; }
  .panel::before, .panel::after { display: none; }
  .step-row { display: block; }
  .step-kind { display: block; text-align: left; margin-bottom: 0.15rem; }
  .step-body, .stepper .step-body { min-height: 0; }
  .step-stat { margin-left: 0; flex-basis: 100%; }
  /* Prev / dots / Next will not fit one 390px line; the dots take their own row
     so neither button is clipped off the edge. */
  .step-nav { flex-wrap: wrap; justify-content: space-between; }
  /* The five-wall rail is unreadable at 390px and the step dots already carry
     the same "which one am I on" signal, so it goes rather than shrinks. */
  .walls-rail { display: none; }
  .step-dots { order: -1; flex-basis: 100%; margin: 0 0 0.6rem; justify-content: center; }
  .bar-row { flex-wrap: wrap; }
  .bar-name { flex-basis: 100%; text-align: left; }
  .bar-val { flex: 0 0 5.6rem; }
  .card-num { font-size: 2.2rem; }
}