/* Tenth Chair — shared styles
   Palette and motif inherited from brand-basics.md */

:root {
  --navy: #0f2438;
  --cream: #f7f3e8;
  --paper: #fdfcf8;
  --gold: #b8912f;
  --slate: #3a4a5c;
  --rule: rgba(15, 36, 56, 0.14);
  --rule-dark: rgba(255, 255, 255, 0.16);

  --serif: "Source Serif 4", Charter, Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --measure: 660px;
  --wide: 1080px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--navy);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.65;
  font-optical-sizing: auto;
}

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

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: var(--wide); margin: 0 auto; padding: 0 24px; }

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  padding: 22px 0;
  font-family: var(--sans);
}
.masthead-inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; color: var(--navy);
}
.brand-mark { flex: none; margin-right: 12px; }
@supports (gap: 1px) { .brand-mark { margin-right: 0; } }
.brand-name {
  font-size: 12px; letter-spacing: 4.5px; text-transform: uppercase;
  font-weight: 500;
}
.masthead nav { display: flex; gap: 26px; font-size: 14px; }
.masthead nav a + a { margin-left: 26px; }
@supports (gap: 1px) { .masthead nav a + a { margin-left: 0; } }
.masthead nav a { color: var(--slate); text-decoration: none; }
.masthead nav a:hover { color: var(--navy); text-decoration: underline; text-underline-offset: 3px; }

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

.hero { background: var(--navy); color: var(--cream); padding: 84px 0 76px; }
.hero .wrap-wide { display: grid; grid-template-columns: 1.15fr 1fr; gap: 64px; align-items: start; }
.eyebrow {
  font-family: var(--sans); font-size: 11px; letter-spacing: 4px;
  text-transform: uppercase; color: rgba(255,255,255,0.5); margin: 0 0 22px;
}
.hero h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(38px, 5.6vw, 60px); line-height: 1.05;
  letter-spacing: -1.4px; margin: 0 0 24px;
}
.hero .lede { font-size: 21px; line-height: 1.5; color: rgba(255,255,255,0.74); margin: 0 0 32px; }
.hero .rule-gold { width: 60px; height: 5px; background: var(--gold); margin-bottom: 30px; }

/* ---------- the signature: a finding block ---------- */

.finding {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--rule-dark);
  border-left: 4px solid var(--gold);
  padding: 26px 28px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.6;
}
.finding .fhead {
  font-family: var(--sans); font-size: 10.5px; letter-spacing: 3px;
  text-transform: uppercase; color: var(--gold); margin-bottom: 18px;
}
.finding dl { margin: 0; display: grid; grid-template-columns: 74px 1fr; gap: 10px 14px; }
.finding dt {
  color: rgba(255,255,255,0.45); font-size: 11px; letter-spacing: 1.6px;
  text-transform: uppercase; padding-top: 3px; font-family: var(--sans);
}
.finding dd { margin: 0; color: var(--cream); }
.finding .verdict {
  margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--rule-dark);
  font-family: var(--sans); font-size: 13px; color: rgba(255,255,255,0.7);
}
.finding .verdict strong { color: var(--gold); letter-spacing: 1px; }

/* ---------- board grid motif ---------- */

.board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; width: 76px; font-size: 0; }
.board span {
  display: inline-block; width: 20px; height: 20px;
  border: 2px solid rgba(15,36,56,0.2);
}
@supports (aspect-ratio: 1) { .board span { width: auto; height: auto; aspect-ratio: 1; } }
.board span.on { border-color: var(--gold); background: rgba(184,145,47,0.18); }
.board.on-dark span { border-color: rgba(255,255,255,0.24); }
.board.on-dark span.on { border-color: var(--gold); background: rgba(184,145,47,0.22); }

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

section { padding: 68px 0; }
section + section { border-top: 1px solid var(--rule); }

h2 {
  font-family: var(--serif); font-weight: 600; font-size: 30px;
  line-height: 1.2; letter-spacing: -0.6px; margin: 0 0 18px;
}
h3 {
  font-family: var(--serif); font-weight: 600; font-size: 22px;
  line-height: 1.28; margin: 38px 0 12px;
}
h4 {
  font-family: var(--sans); font-weight: 600; font-size: 15px;
  margin: 26px 0 8px; color: var(--slate);
}
p { margin: 0 0 18px; }
a { color: var(--navy); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--gold); }

ul, ol { margin: 0 0 18px; padding-left: 24px; }
li { margin-bottom: 9px; }

blockquote {
  margin: 26px 0; padding: 2px 0 2px 22px;
  border-left: 3px solid var(--gold);
  font-style: italic; color: var(--slate);
}

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

pre {
  background: var(--navy); color: var(--cream);
  font-family: var(--mono); font-size: 13px; line-height: 1.6;
  padding: 22px 24px; overflow-x: auto; margin: 0 0 22px;
  border-left: 4px solid var(--gold);
}
code { font-family: var(--mono); font-size: 0.88em; }
p code, li code, td code {
  background: rgba(15,36,56,0.07); padding: 1px 5px; color: var(--navy);
}

/* ---------- tables ---------- */

table { width: 100%; border-collapse: collapse; margin: 0 0 24px; font-family: var(--sans); font-size: 15px; }
th {
  background: var(--navy); color: var(--cream); text-align: left;
  padding: 10px 14px; font-size: 12px; letter-spacing: 1.4px; text-transform: uppercase; font-weight: 500;
}
td { border-bottom: 1px solid var(--rule); padding: 11px 14px; vertical-align: top; }

/* ---------- callouts ---------- */

.note {
  background: rgba(15,36,56,0.04); border-left: 3px solid var(--slate);
  padding: 18px 22px; margin: 0 0 24px; font-size: 17.5px;
}
.note strong { font-family: var(--sans); font-size: 15px; }

/* ---------- article list ---------- */

.articles { list-style: none; padding: 0; margin: 0; }
.articles li { border-top: 1px solid var(--rule); margin: 0; padding: 26px 0; }
.articles li:last-child { border-bottom: 1px solid var(--rule); }
.articles h3 { margin: 0 0 8px; font-size: 24px; }
.articles h3 a { text-decoration: none; }
.articles h3 a:hover { text-decoration: underline; text-underline-offset: 4px; }
.articles p { margin: 0; color: var(--slate); font-size: 17.5px; }

/* ---------- buttons ---------- */

.btn {
  display: inline-block; font-family: var(--sans); font-size: 15px; font-weight: 500;
  padding: 14px 26px; text-decoration: none; border: 2px solid var(--gold);
  background: var(--gold); color: #fff; transition: background .15s, color .15s;
}
.btn:hover { background: transparent; color: var(--gold); }
.btn-ghost { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn-ghost:hover { background: var(--navy); color: var(--cream); }
.hero .btn-ghost { color: var(--cream); border-color: rgba(255,255,255,0.5); }
.hero .btn-ghost:hover { background: var(--cream); color: var(--navy); border-color: var(--cream); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 8px; }

/* ---------- offer strip ---------- */

.offer {
  background: var(--navy); color: var(--cream); padding: 54px 0;
}
.offer h2 { color: var(--cream); }
.offer p { color: rgba(255,255,255,0.74); }
.offer .kicker {
  font-family: var(--sans); font-size: 11px; letter-spacing: 4px;
  text-transform: uppercase; color: var(--gold); margin-bottom: 16px;
}

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

.article-head { padding: 62px 0 34px; border-bottom: 1px solid var(--rule); }
.article-head h1 {
  font-family: var(--serif); font-weight: 600; font-size: clamp(32px, 4.6vw, 46px);
  line-height: 1.1; letter-spacing: -1px; margin: 0 0 18px;
}
.article-head .lede { font-size: 21px; line-height: 1.5; color: var(--slate); margin: 0; }
.meta {
  font-family: var(--sans); font-size: 12px; letter-spacing: 2.6px;
  text-transform: uppercase; color: var(--slate); margin: 0 0 20px;
}
article { padding: 40px 0 20px; }

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

footer {
  border-top: 1px solid var(--rule); margin-top: 40px; padding: 44px 0 60px;
  font-family: var(--sans); font-size: 14px; color: var(--slate);
}
footer a { color: var(--slate); }
footer .tagline { font-family: var(--serif); font-style: italic; font-size: 17px; margin-bottom: 20px; color: var(--navy); }

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

@media (max-width: 820px) {
  body { font-size: 18px; }
  .hero { padding: 56px 0 52px; }
  .hero .wrap-wide { grid-template-columns: 1fr; gap: 40px; }
  .masthead nav { gap: 18px; font-size: 13px; }
  .masthead-inner { flex-wrap: wrap; }
  section { padding: 52px 0; }
  .finding { font-size: 12.5px; padding: 20px; }
  .finding dl { grid-template-columns: 62px 1fr; }
}

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

:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }

/* small masthead mark — fixed sizing, no grid dependency */
.board-sm { width: 30px; gap: 3px; }
.board-sm span { width: 8px; height: 8px; border-width: 1.5px; }
@supports (aspect-ratio: 1) { .board-sm span { width: auto; height: auto; } }