/* Oak Keel — studio index. Layout: one central column framed by 1px structural rules, like a drafting sheet. */
@font-face { font-family: "Newsreader"; src: url(fonts/newsreader-latin-normal.woff2) format("woff2"); font-weight: 200 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Newsreader"; src: url(fonts/newsreader-latin-italic.woff2) format("woff2"); font-weight: 200 800; font-style: italic; font-display: swap; }
@font-face { font-family: "Plus Jakarta Sans"; src: url(fonts/plus-jakarta-sans-latin-normal.woff2) format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url(fonts/jetbrains-mono-latin-normal.woff2) format("woff2"); font-weight: 100 800; font-display: swap; }

:root {
  --paper: #F7F5F0;
  --paper-2: #EFEBE2;
  --ink: #1A1917;
  --ink-2: #57524A;
  --rule: #D6CFC2;
  --oak: #8C6239;
  --brass: #B5835A;
  --blueprint: #2B4C6F;
  --badge-bg: #E3E9EF;
  --mark-a: #19334C;
  --mark-b: #A87C31;

  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --col: 68rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #121518;
    --paper-2: #181C20;
    --ink: #ECE7DD;
    --ink-2: #A59E92;
    --rule: #2C3238;
    --oak: #C99A6E;
    --brass: #C99A6E;
    --blueprint: #8FB3D9;
    --badge-bg: #1C2733;
    --mark-a: #ECE7DD;
    --mark-b: #C49A4E;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #121518;
  --paper-2: #181C20;
  --ink: #ECE7DD;
  --ink-2: #A59E92;
  --rule: #2C3238;
  --oak: #C99A6E;
  --brass: #C99A6E;
  --blueprint: #8FB3D9;
  --badge-bg: #1C2733;
  --mark-a: #ECE7DD;
  --mark-b: #C49A4E;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
a { color: var(--blueprint); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--oak); }
:focus-visible { outline: 2px solid var(--blueprint); outline-offset: 3px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }

.sheet {
  max-width: var(--col);
  margin: 0 auto;
  border-left: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
}
.zone { border-bottom: 1px solid var(--rule); padding-block: clamp(2.5rem, 6vw, 4.5rem); padding-inline: clamp(1rem, 4vw, 3rem); }
.label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* Top bar */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding-block: 1rem; padding-inline: clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--rule);
}
.wordmark {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--sans); font-weight: 700; font-size: 1rem; letter-spacing: 0.12em;
  color: var(--mark-a); text-decoration: none;
}
.wordmark .mark { height: 28px; width: auto; flex: none; }
.wordmark b { font-weight: 700; color: var(--mark-b); }
.mark-a { fill: var(--mark-a); }
.mark-b { fill: var(--mark-b); }
.wordmark:hover { color: var(--mark-a); }
.nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.nav a { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); text-decoration: none; }
.nav a:hover { color: var(--blueprint); }

/* Hero */
.hero { display: grid; }
.hero-copy { display: grid; gap: 1.5rem; min-width: 0; }
.hero h1 { max-width: 15em; font-size: clamp(2.4rem, 5.6vw, 4.4rem); line-height: 1.04; font-weight: 400; }
.hero h1 em { font-style: italic; color: var(--oak); }
.hero .sub { font-size: 1.12rem; color: var(--ink-2); max-width: 34rem; }

/* Section heads */
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.25rem; }
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); }

/* Principles */
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.principle { padding: 1.75rem 1.5rem 2rem; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); display: grid; gap: 0.75rem; align-content: start; min-width: 0; }
.principle .num { font-family: var(--mono); font-size: 0.8rem; color: var(--oak); letter-spacing: 0.06em; }
.principle h3 { font-size: 1.4rem; line-height: 1.2; }
.principle p { color: var(--ink-2); font-size: 0.97rem; }
@media (max-width: 820px) { .principles { grid-template-columns: minmax(0, 1fr); } }

/* Workbench */
.bench { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 1.25rem; }
.card { border: 1px solid var(--rule); padding: 1.75rem; display: grid; gap: 1rem; align-content: start; min-width: 0; background: var(--paper); }
.card.flagship { border-color: var(--ink-2); }
.card.slot { border-style: dashed; background: var(--paper-2); }
.card-meta { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.badge {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--blueprint); background: var(--badge-bg); padding: 0.3rem 0.55rem; border-radius: 2px;
  display: inline-flex; align-items: center; gap: 0.45rem;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.muted { color: var(--ink-2); background: transparent; border: 1px solid var(--rule); }
.badge.muted::before { background: transparent; border: 1px solid currentColor; }
.card .ver { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-2); }
.card h3 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); line-height: 1.05; font-weight: 500; }
.card h3 sup { font-family: var(--sans); font-size: 0.35em; font-weight: 500; vertical-align: super; margin-left: 0.1em; }
.card.slot h3 { font-size: 1.5rem; color: var(--ink-2); }
.card .tagline { font-family: var(--serif); font-style: italic; font-size: 1.2rem; color: var(--oak); }
.card p.desc { color: var(--ink-2); }
.specs { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.specs li { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-2); border: 1px solid var(--rule); padding: 0.2rem 0.5rem; }
.cta {
  justify-self: start; display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--sans); font-weight: 600; font-size: 0.95rem;
  color: var(--paper); background: var(--ink); text-decoration: none;
  padding: 0.7rem 1.1rem; border: 1px solid var(--ink); transition: background .15s, color .15s;
}
.cta:hover { background: var(--blueprint); border-color: var(--blueprint); color: var(--paper); }
@media (max-width: 820px) { .bench { grid-template-columns: minmax(0, 1fr); } }

/* Contact */
.contact { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.contact-item { display: grid; gap: 0.5rem; align-content: start; min-width: 0; }
.contact-item .value { font-family: var(--serif); font-size: 1.3rem; overflow-wrap: anywhere; }
.contact-item .value a { color: var(--ink); text-decoration-color: var(--rule); }
.contact-item .value a:hover { color: var(--blueprint); text-decoration-color: currentColor; }
.contact-item .note { color: var(--ink-2); font-size: 0.9rem; }
@media (max-width: 820px) { .contact { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; } }

/* Footer */
.footer {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding-block: 1.5rem; padding-inline: clamp(1rem, 4vw, 3rem);
  font-family: var(--mono); font-size: 0.75rem; color: var(--ink-2);
}
.footer nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.footer a { color: var(--ink-2); }
.footer a:hover { color: var(--blueprint); }

/* Legal pages */
.doc { max-width: 42rem; display: grid; gap: 1.1rem; }
.doc h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); line-height: 1.08; font-weight: 400; }
.doc h2 { font-size: 1.45rem; margin-top: 1.4rem; }
.doc p, .doc li { color: var(--ink); }
.doc ul { margin: 0; padding-left: 1.2rem; display: grid; gap: 0.4rem; }
.doc .meta { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-2); }
.placeholder { background: var(--badge-bg); color: var(--blueprint); font-family: var(--mono); font-size: 0.85em; padding: 0 0.3em; }