/* ============================================================
   plvch — site (hub) styles
   Built on plvch-tokens.css. Same light/dark system + design
   language as the essays (Open Indexing, ETF Fee Paradox, …),
   so theme + look carry across the whole domain.
   ============================================================ */

/* ---- Theme surfaces (shared with the essays) ---- */
:root[data-theme="light"] {
  --oi-page-bg:      var(--plvch-paper);
  --oi-surface:      var(--plvch-paper);
  --oi-surface-2:    var(--plvch-bone);
  --oi-surface-sunk: var(--plvch-paper-2);
  --oi-ink-1:        var(--plvch-ink-900);
  --oi-ink-2:        var(--plvch-ink-700);
  --oi-ink-3:        var(--plvch-ink-500);
  --oi-ink-4:        var(--plvch-ink-300);
  --oi-rule:         #d8d3c4;
  --oi-rule-strong:  var(--plvch-ink-900);
  --oi-brand:        var(--plvch-navy-800);
  --oi-brand-2:      var(--plvch-forest-800);
  --oi-accent:       var(--plvch-ochre);
  --oi-highlight:    #f1e6c4;
  --oi-chip-bg:      var(--plvch-paper-2);
  --oi-shadow-card:  0 1px 2px rgba(6,26,53,0.05), 0 10px 30px -16px rgba(6,26,53,0.10);
}
:root[data-theme="dark"] {
  --oi-page-bg:      #08172e;
  --oi-surface:      #08172e;
  --oi-surface-2:    #0e2243;
  --oi-surface-sunk: #0b1d39;
  --oi-ink-1:        #f1ede2;
  --oi-ink-2:        #c6ccd6;
  --oi-ink-3:        #8993a3;
  --oi-ink-4:        #5a6678;
  --oi-rule:         #1a3056;
  --oi-rule-strong:  #f1ede2;
  --oi-brand:        #d9e0ec;
  --oi-brand-2:      #6ea88a;
  --oi-accent:       #d4a857;
  --oi-highlight:    #2a2a14;
  --oi-chip-bg:      #0e2243;
  --oi-shadow-card:  0 0 0 1px var(--oi-rule), 0 18px 40px -20px rgba(0,0,0,0.6);
}

* { box-sizing: border-box; }

html[data-theme="light"], html[data-theme="light"] body { background: var(--plvch-paper); }
html[data-theme="dark"],  html[data-theme="dark"]  body { background: #08172e; }

body {
  margin: 0;
  color: var(--oi-ink-1);
  background: var(--oi-page-bg);
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}

a { color: var(--oi-brand); text-decoration-color: var(--oi-rule); }
a:hover { color: var(--oi-brand-2); text-decoration-color: currentColor; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 32px; }
.col  { max-width: 760px; }

/* ---------------- Masthead ---------------- */
.masthead {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--oi-page-bg) 86%, transparent);
  border-bottom: 1px solid var(--oi-rule);
  backdrop-filter: blur(8px);
}
.masthead-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  max-width: 1120px; margin: 0 auto; padding: 13px 32px;
}
.wordmark {
  font-family: var(--font-display);
  font-size: 18px; font-weight: 500; letter-spacing: -0.04em;
  color: var(--oi-brand); text-decoration: none; white-space: nowrap;
}
.mh-right { display: flex; align-items: center; }
/* Separate the three header groups (nav | locales | theme) with hairline dividers */
.mh-right > * + * { margin-left: 18px; padding-left: 18px; border-left: 1px solid var(--oi-rule); }
.mh-nav { display: flex; align-items: center; gap: 20px; }
.mh-nav a {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--oi-ink-3); text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.mh-nav a:hover { color: var(--oi-ink-1); }
.mh-nav a[aria-current="page"] { color: var(--oi-ink-1); }

/* Language switcher */
.lang {
  display: inline-flex; gap: 2px; align-items: center;
  font-family: var(--font-display); font-size: 11px; font-weight: 600; letter-spacing: 0.1em;
}
.lang a {
  color: var(--oi-ink-3); text-decoration: none; padding: 2px 5px; border-radius: var(--radius-2);
}
.lang a:hover { color: var(--oi-ink-1); }
.lang a[aria-current="true"] { color: var(--oi-page-bg); background: var(--oi-rule-strong); }

/* Theme toggle (segmented) — same as the essays */
.theme-toggle { display: inline-flex; border: 1px solid var(--oi-rule); border-radius: 999px; padding: 2px; background: var(--oi-surface); }
.theme-toggle button {
  background: transparent; border: 0; cursor: pointer;
  font-family: var(--font-display); font-size: 10px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--oi-ink-3); padding: 6px 11px; border-radius: 999px;
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.theme-toggle button.active { background: var(--oi-rule-strong); color: var(--oi-page-bg); }
.theme-toggle button:hover:not(.active) { color: var(--oi-ink-1); }

/* ---------------- Eyebrow ---------------- */
.eyebrow {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--oi-ink-3);
}

/* ---------------- Hero ---------------- */
.hero { padding: 64px 0 44px; border-bottom: 1px solid var(--oi-rule); }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 46px); line-height: 1.06; letter-spacing: -0.03em; font-weight: 600;
  color: var(--oi-ink-1); margin: 12px 0 0;
}
.hero .lede { font-size: clamp(16px, 2vw, 19px); line-height: 1.55; color: var(--oi-ink-2); margin: 16px 0 0; max-width: 46ch; }

/* Home: single column — title, bio, what-I-do, writing all share one width */
.home-col { max-width: 750px; }

.whatido { margin-top: 30px; }
.do-head {
  font-family: var(--font-display); font-size: 11px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--oi-ink-3); margin: 0 0 4px;
}
.do-list { list-style: none; margin: 0; padding: 0; }
.do-item {
  display: grid; grid-template-columns: 240px 1fr; gap: 4px 28px; align-items: baseline;
  padding: 12px 0; border-top: 1px solid var(--oi-rule);
}
.do-item:last-child { border-bottom: 1px solid var(--oi-rule); }
.do-term {
  font-family: var(--font-display); font-size: 15px; font-weight: 600;
  letter-spacing: -0.005em; color: var(--oi-ink-1); text-decoration: none;
}
a.do-term:hover { color: var(--oi-brand-2); }
.do-term .ext { color: var(--oi-ink-3); font-weight: 400; }
.do-note { font-size: 13.5px; line-height: 1.45; color: var(--oi-ink-3); }
.wip {
  display: inline-block; margin-left: 7px; vertical-align: middle;
  font-family: var(--font-display); font-size: 9.5px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--oi-accent);
  border: 1px solid currentColor; border-radius: 999px; padding: 1px 6px;
}

/* ---------------- Section ---------------- */
section.block { padding: 56px 0; border-bottom: 1px solid var(--oi-rule); }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 28px; }
.section-head h2 { font-family: var(--font-display); font-size: 13px; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--oi-ink-3); margin: 0; }

/* ---------------- Essay cards ---------------- */
.posts { display: grid; gap: 0; }
.post-card {
  display: grid; grid-template-columns: 120px 1fr; gap: 28px;
  padding: 28px 0; border-top: 1px solid var(--oi-rule); text-decoration: none;
}
.post-card:last-child { border-bottom: 1px solid var(--oi-rule); }
.post-card:hover .post-title { color: var(--oi-brand-2); }
.post-vol { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; color: var(--oi-ink-3); padding-top: 4px; }
.post-title { font-family: var(--font-display); font-size: clamp(22px, 3vw, 28px); line-height: 1.15; letter-spacing: -0.01em; font-weight: 600; color: var(--oi-ink-1); margin: 0; transition: color var(--dur-fast) var(--ease-out); }
.post-dek { color: var(--oi-ink-2); margin: 10px 0 0; max-width: 60ch; }
.post-meta { margin: 14px 0 0; display: flex; flex-wrap: wrap; gap: 8px 14px; font-size: 12.5px; color: var(--oi-ink-3); font-family: var(--font-display); letter-spacing: 0.02em; }
.post-meta .tag { color: var(--oi-ink-3); }
.lang-note { display: inline-block; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--oi-ink-4); border: 1px solid var(--oi-rule); border-radius: 999px; padding: 1px 8px; }

/* Compact "index" variant used on the home page */
.posts.index .post-card { grid-template-columns: 76px 1fr; gap: 22px; padding: 18px 0; }
.posts.index .post-title { font-size: clamp(18px, 2.2vw, 21px); }
.posts.index .post-dek { font-size: 14px; margin-top: 5px; max-width: 68ch; }
.posts.index .post-meta { margin-top: 9px; }

/* ---------------- Teasers (About / Practice) ---------------- */
.teasers { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.teaser {
  display: block; text-decoration: none; padding: 26px; border: 1px solid var(--oi-rule); border-radius: var(--radius-3);
  background: var(--oi-surface-2); box-shadow: var(--oi-shadow-card);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.teaser:hover { transform: translateY(-2px); border-color: var(--oi-ink-4); }
.teaser h3 { font-family: var(--font-display); font-size: 20px; font-weight: 600; color: var(--oi-ink-1); margin: 8px 0 0; }
.teaser p { color: var(--oi-ink-2); margin: 10px 0 0; }
.teaser .more { display: inline-block; margin-top: 16px; font-family: var(--font-display); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--oi-brand); }

/* ---------------- Prose (About / Practice / Legal) ---------------- */
.doc { padding: 64px 0 24px; }
.doc h1 { font-family: var(--font-display); font-size: clamp(32px, 6vw, 48px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 600; margin: 14px 0 0; color: var(--oi-ink-1); }
.prose { max-width: 720px; }
.prose h2 { font-family: var(--font-display); font-size: 22px; font-weight: 600; margin: 40px 0 0; color: var(--oi-ink-1); }
.prose h3 { font-family: var(--font-display); font-size: 16px; font-weight: 600; margin: 26px 0 0; color: var(--oi-ink-1); }
.prose p, .prose li { color: var(--oi-ink-2); font-size: 16.5px; line-height: 1.6; }
.prose p { margin: 18px 0 0; }
.prose ul { margin: 14px 0 0; padding-left: 20px; }
.prose li { margin: 6px 0 0; }
.prose a { color: var(--oi-brand); }
.prose strong { color: var(--oi-ink-1); }  /* tokens' base strong uses a non-flipping --fg-1; force theme-aware */
.prose .muted { color: var(--oi-ink-3); }

/* CTA button */
.btn {
  display: inline-block; margin-top: 22px; text-decoration: none;
  font-family: var(--font-display); font-size: 13px; font-weight: 600; letter-spacing: 0.06em;
  color: var(--oi-page-bg); background: var(--oi-rule-strong);
  padding: 11px 20px; border-radius: var(--radius-2);
}
.btn:hover { background: var(--oi-brand); }
.prose .notice + .btn { margin-top: 18px; }
/* Keep button text readable inside .prose, which styles bare a{} (higher specificity) */
.prose a.btn, .prose a.btn:hover { color: var(--oi-page-bg); }

/* Draft / placeholder notice */
.notice {
  margin: 24px 0 0; padding: 14px 16px; border-left: 3px solid var(--oi-accent);
  background: var(--oi-surface-sunk); border-radius: var(--radius-2);
  font-size: 14px; color: var(--oi-ink-2);
}
.notice strong { color: var(--oi-ink-1); }

/* ---------------- Footer ---------------- */
footer.site {
  padding: 48px 0; color: var(--oi-ink-3);
}
.foot-grid { display: flex; flex-wrap: wrap; justify-content: flex-start; gap: 24px 64px; }
.foot-grid .col-foot h4 { font-family: var(--font-display); font-size: 11px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--oi-ink-3); margin: 0 0 10px; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li { margin: 4px 0; }
.foot-grid a { color: var(--oi-ink-2); text-decoration: none; }
.foot-grid a:hover { color: var(--oi-ink-1); }
.foot-bottom { display: flex; flex-wrap: wrap; justify-content: flex-start; gap: 6px 20px; margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--oi-rule); font-size: 12.5px; }

/* ---------------- Responsive ---------------- */
@media (max-width: 560px) {
  .do-item { grid-template-columns: 1fr; gap: 2px; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  .masthead-inner { padding: 11px 20px; }
  .mh-nav { display: none; }
  .post-card { grid-template-columns: 1fr; gap: 6px; }
  .posts.index .post-card { grid-template-columns: 1fr; gap: 6px; }
  .post-vol { padding-top: 0; }
  .teasers { grid-template-columns: 1fr; }
}
@media print { .masthead, .theme-toggle, .lang, footer.site { display: none; } }