/* ================================================================
   Formwork — site styles
   Tokens and every color/type decision derive from design-plan.md.
   Flat, low-specificity class selectors throughout.
   ================================================================ */

:root {
  --paper: #FBFBFA;
  --concrete: #F0F0ED;
  --ink: #191B1D;
  --steel: #64696E;
  --hivis: #E8570E;
  --hivis-text: #C4470B; /* darker shade of --hivis for small text on paper (AA) */
  --cured: #2E7D57;
  --hairline: rgba(25, 27, 29, 0.1);
  --hairline-strong: rgba(25, 27, 29, 0.25);
  --radius: 10px;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", monospace;
  --sans: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1180px;
  --nav-h: 56px;
}

/* ---- base ---- */

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
}

img, svg { max-width: 100%; display: block; }

h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }

a { color: inherit; text-decoration-color: var(--hivis); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--hivis-text); }

button { font: inherit; color: inherit; }

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

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--ink); color: var(--paper);
  padding: 10px 16px; border-radius: 0 0 8px 8px;
  font-family: var(--mono); font-size: 13px; text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus-visible { top: 0; color: var(--paper); }

/* ---- type roles ---- */

.display {
  font-weight: 800;
  font-stretch: 125%;
  line-height: 1.04;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 20px;
}

.eyebrow::before { content: "// "; color: var(--hivis); }

.section-h {
  font-size: clamp(28px, 4vw, 40px);
  max-width: 22ch;
  margin-bottom: 16px;
}

.lead { color: var(--steel); max-width: 58ch; }

.mono-label {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--steel);
}

/* ---- layout ---- */

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }

.section { padding-block: 104px; }
.section + .section { border-top: 1px solid var(--hairline); }

/* ---- nav ---- */

.site-nav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}

.site-nav .wrap {
  height: 100%; display: flex; align-items: center; gap: 24px;
}

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 800; font-stretch: 125%; font-size: 17px;
  letter-spacing: 0.02em; text-decoration: none; text-transform: uppercase;
}
.brand:hover { color: inherit; }
.brand-glyph { width: 18px; height: 18px; flex: none; }

.nav-main { margin-left: auto; }
.nav-links {
  display: flex; gap: 4px; align-items: center;
  list-style: none; margin-block: 0; padding: 0;
}
.nav-links a {
  font-size: 14px; font-weight: 500; text-decoration: none;
  padding: 7px 12px; border-radius: 99px; color: var(--steel);
}
.nav-links a:hover { color: var(--ink); background: var(--concrete); }

.nav-menu-btn {
  display: none; align-items: center;
  background: transparent; border: 1px solid var(--hairline-strong);
  border-radius: 99px; padding: 7px 14px; cursor: pointer;
  font-size: 14px; font-weight: 500; color: var(--ink);
}
.nav-menu-btn[aria-expanded="true"] { background: var(--concrete); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--hivis); color: var(--ink);
  font-weight: 600; font-size: 15px; text-decoration: none;
  padding: 11px 20px; border: 0; border-radius: 8px; cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { color: var(--ink); transform: translateY(-1px); box-shadow: 0 3px 12px rgba(232, 87, 14, 0.28); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: 8px 14px; font-size: 14px; }

.btn-ghost {
  display: inline-flex; align-items: center;
  background: transparent; color: var(--ink);
  font-weight: 600; font-size: 15px; text-decoration: none;
  padding: 11px 20px; border: 1px solid var(--hairline-strong); border-radius: 8px;
  cursor: pointer; transition: border-color 0.15s ease, transform 0.15s ease;
}
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); transform: translateY(-1px); }

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

.hero { padding-block: 88px 104px; }
.hero .wrap {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 56px; align-items: center;
}
.hero-h { font-size: clamp(40px, 5.6vw, 68px); margin: 18px 0 20px; }
.hero-p { color: var(--steel); max-width: 46ch; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

/* the artifact window */

.artifact {
  background: #fff; border: 1px solid var(--hairline-strong);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 24px 60px -30px rgba(25, 27, 29, 0.35);
  font-size: 13px;
}
.artifact-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-bottom: 1px solid var(--hairline);
  background: var(--concrete);
}
.artifact-title { font-family: var(--mono); font-size: 12px; color: var(--steel); }
.own-chip {
  margin-left: auto;
  font-family: var(--mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.12em; padding: 3px 9px; border-radius: 99px;
  background: var(--cured); color: #fff;
}
.own-chip.from { background: var(--hivis); color: var(--ink); }

.artifact-toolbar { display: flex; gap: 8px; padding: 12px 14px 4px; }
.artifact-toolbar .tb {
  font-size: 12px; font-weight: 600; border-radius: 6px;
  border: 1px solid var(--hairline-strong); background: #fff;
  padding: 5px 11px; color: var(--ink); pointer-events: none;
}
.artifact-toolbar .tb-primary { background: var(--hivis); border-color: var(--hivis); }

.artifact-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.artifact-table th {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--steel); font-weight: 500;
  text-align: left; padding: 8px 14px; border-bottom: 1px solid var(--hairline);
}
.artifact-table td { padding: 9px 14px; border-bottom: 1px solid var(--hairline); }
.artifact-table .tag {
  font-family: var(--mono); font-size: 10px; padding: 2px 8px;
  border-radius: 99px; background: var(--concrete); color: var(--steel); white-space: nowrap;
}
.artifact-table .tag-done { background: rgba(46, 125, 87, 0.12); color: var(--cured); }
.artifact-status {
  font-family: var(--mono); font-size: 12px; color: var(--steel);
  padding: 10px 14px; border-top: 1px solid var(--hairline); background: var(--concrete);
  min-height: 38px;
}
.artifact-status .ok { color: var(--cured); }

.replay {
  margin-top: 14px; background: none; border: 0; cursor: pointer;
  font-family: var(--mono); font-size: 12px; color: var(--steel);
  text-decoration: underline; text-decoration-color: var(--hairline-strong);
  text-underline-offset: 3px; padding: 4px;
}
.replay:hover { color: var(--hivis-text); }

/* build animation: only while .animating, items hide until .on */
.artifact.animating .b { opacity: 0; transform: translateY(8px); }
.artifact .b { transition: opacity 0.35s ease, transform 0.35s ease; }
.artifact.animating .b.on { opacity: 1; transform: none; }

/* ---- card grids (problem / phases) ---- */

.card-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 28px; margin-top: 48px;
}
.card {
  background: var(--concrete); border: 1px solid var(--hairline);
  border-radius: var(--radius); padding: 28px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--hairline-strong); }
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--steel); font-size: 15.5px; }

.phase-num {
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  color: var(--hivis-text); margin-bottom: 14px; display: block;
}
.phase-len { display: block; margin-top: 16px; }

/* ---- tiers ---- */

.tier-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 28px; margin-top: 48px;
}
.tier {
  border: 1px solid var(--hairline); border-radius: var(--radius);
  padding: 28px; background: #fff; display: flex; flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.tier:hover { transform: translateY(-2px); border-color: var(--hairline-strong); }
.tier-flag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--hivis-text); margin-bottom: 12px; min-height: 1.2em;
}
.tier h3 { font-size: 21px; font-weight: 700; font-stretch: 115%; margin-bottom: 20px; }
.tier dl { display: grid; gap: 16px; margin: 0 0 24px; }
.tier dt { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--steel); margin-bottom: 4px; }
.tier dd { font-size: 15.5px; }
.tier .btn-ghost { margin-top: auto; justify-content: center; }
.tier-note { margin-top: 36px; color: var(--steel); font-size: 15.5px; max-width: 62ch; }

/* ---- diagnostic ---- */

.diag {
  margin-top: 48px; background: var(--concrete);
  border: 1px solid var(--hairline); border-radius: var(--radius);
  padding: 40px; max-width: 720px;
}
.diag-progress { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.diag-bar { flex: 1; height: 2px; background: var(--hairline-strong); border-radius: 2px; overflow: hidden; }
.diag-bar span { display: block; height: 100%; background: var(--hivis); width: 0%; transition: width 0.3s ease; }
.diag-q { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
.diag-chips { display: flex; flex-direction: column; gap: 10px; }
.chip {
  text-align: left; background: #fff; border: 1px solid var(--hairline-strong);
  border-radius: 8px; padding: 14px 18px; font-size: 16px; cursor: pointer;
  min-height: 44px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.chip:hover { border-color: var(--ink); transform: translateY(-1px); }

.diag-result-head {
  font-family: var(--mono); font-size: 14px; font-weight: 600;
  letter-spacing: 0.1em; margin-bottom: 6px;
}
.diag-tier-chip {
  display: inline-block; font-family: var(--mono); font-size: 12px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--cured); color: #fff; border-radius: 99px;
  padding: 5px 14px; margin-bottom: 18px;
}
.diag-result p { margin-bottom: 24px; }
.diag-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---- marquee ---- */

.marquee-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 24px; margin-bottom: 40px; }
.marquee { overflow: hidden; }
.mq-row { display: flex; overflow: hidden; padding-block: 18px; }
.mq-row + .mq-row { border-top: 1px solid var(--hairline); }
.mq-track { display: flex; align-items: center; gap: 64px; padding-right: 64px; width: max-content; flex: none; }
.mq-a .mq-track { animation: mq-left 46s linear infinite; }
.mq-b .mq-track { animation: mq-right 52s linear infinite; }

@keyframes mq-left { from { transform: translateX(0); } to { transform: translateX(-100%); } }
@keyframes mq-right { from { transform: translateX(-100%); } to { transform: translateX(0); } }

.logo-mark {
  height: 30px; flex: none;
  background: var(--steel); opacity: 0.62;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-size: contain; mask-size: contain;
  -webkit-mask-position: center; mask-position: center;
  transition: opacity 0.2s ease, background-color 0.2s ease;
}
.logo-mark:hover { background: var(--hivis); opacity: 1; }

/* no-JS fallback rows: plain imgs, static wrap */
.mq-static { display: flex; flex-wrap: wrap; gap: 32px 56px; align-items: center; }
.mq-static img { height: 30px; width: auto; max-width: 100%; object-fit: contain; filter: grayscale(1) opacity(0.55); }
.mq-static[hidden] { display: none; }

/* ---- team ---- */

.team-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 28px; margin-top: 48px;
}
.team-card {
  border: 1px solid var(--hairline); border-radius: var(--radius);
  overflow: hidden; background: #fff;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.team-card:hover { transform: translateY(-2px); border-color: var(--hairline-strong); }
.team-card img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; }
.team-meta { padding: 14px 16px 16px; position: relative; }
.team-name { font-weight: 700; font-size: 15.5px; }
.team-role { color: var(--steel); font-size: 13.5px; margin-top: 2px; }

/* ---- outcomes ---- */

.outcome-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 28px; margin-top: 48px;
}
.outcome {
  border-top: 2px solid var(--ink); padding-top: 18px;
}
.outcome dt { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--steel); }
.outcome dd { font-size: clamp(24px, 2.6vw, 34px); font-weight: 800; font-stretch: 120%; margin-top: 8px; }

/* ---- contact ---- */

.contact .wrap { display: grid; grid-template-columns: 5fr 6fr; gap: 64px; align-items: start; }

.form-grid { display: grid; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field label { display: block; font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; font-size: 16px; color: var(--ink);
  background: #fff; border: 1px solid var(--hairline-strong); border-radius: 8px;
  padding: 12px 14px;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible {
  outline: 2px solid var(--hivis); outline-offset: 1px; border-color: var(--hivis);
}
.field.invalid input, .field.invalid textarea { border-color: var(--hivis-text); }
.field-error { display: none; color: var(--hivis-text); font-size: 13.5px; margin-top: 6px; }
.field.invalid .field-error { display: block; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-note { font-size: 13.5px; color: var(--steel); }
.form-status { font-weight: 600; margin-top: 4px; }
.form-status.ok { color: var(--cured); }
.form-status.err { color: var(--hivis-text); }

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

.site-footer { border-top: 1px solid var(--hairline); padding-block: 40px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: center; justify-content: space-between; }
.site-footer p { font-size: 14px; color: var(--steel); }

/* ---- reveals (JS-gated via html.js) ---- */

html.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.55s ease, transform 0.55s ease; }
html.js .reveal.in { opacity: 1; transform: none; }

/* ---- reduced motion ---- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  .mq-a .mq-track, .mq-b .mq-track { animation: none; }
  .mq-row { flex-wrap: wrap; }
  .mq-track { flex-wrap: wrap; width: auto; gap: 32px 56px; }
  .artifact .b, .card, .tier, .team-card, .btn, .btn-ghost, .chip { transition: none; }
}

/* ---- responsive ---- */

@media (max-width: 1023px) {
  /* minmax(0,…): the artifact table's min-content width must not widen the track */
  .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 48px; }
  .card-grid, .tier-grid { grid-template-columns: 1fr 1fr; }
  .outcome-grid { grid-template-columns: 1fr 1fr; gap: 40px 28px; }
  .team-grid { grid-template-columns: repeat(3, 1fr); }
  .contact .wrap { grid-template-columns: 1fr; gap: 48px; }
  /* nav collapses to a disclosure menu */
  .nav-menu-btn { display: inline-flex; }
  .nav-links {
    display: none; position: absolute; top: calc(var(--nav-h) + 6px); right: 16px;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--paper); border: 1px solid var(--hairline-strong);
    border-radius: 12px; padding: 8px; min-width: 200px;
    box-shadow: 0 16px 40px -18px rgba(25, 27, 29, 0.35);
  }
  .site-nav.menu-open .nav-links { display: flex; }
  .nav-links a { display: block; padding: 10px 14px; border-radius: 8px; }
}

@media (max-width: 640px) {
  .section { padding-block: 72px; }
  .hero { padding-block: 56px 72px; }
  .card-grid, .tier-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .outcome-grid { grid-template-columns: 1fr 1fr; }
  /* team → horizontal snap-scroll strip */
  .team-grid {
    display: grid; grid-auto-flow: column; grid-auto-columns: 72%;
    overflow-x: auto; scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    margin-inline: -24px; padding-inline: 24px; padding-bottom: 8px;
  }
  .team-card { scroll-snap-align: start; }
}