:root {
  --pink: #e6007e;
  --pink-soft: #ff5fa8;
  --purple: #4a2b7a;
  --ink: #1a1524;
  --cream: #fbf5ef;
  --card: #ffffff;
  --line: #eadfe6;
  --muted: #7a6f82;
  --ok: #17a34a;
  --warn: #b45309;
  --warn-bg: rgba(217,119,6,.09);
  --warn-line: rgba(217,119,6,.32);
  --shadow: 0 1px 3px rgba(74,43,122,.08), 0 8px 24px rgba(74,43,122,.06);
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f3edf7; --cream: #14101c; --card: #1e1826; --line: #322a3d;
    --muted: #a99db4; --shadow: 0 1px 3px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    --warn: #fbbf24; --warn-bg: rgba(251,191,36,.10); --warn-line: rgba(251,191,36,.30);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: var(--sans); color: var(--ink);
  background: var(--cream); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--pink); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
  max-width: 860px; margin: 0 auto; padding: 1.4rem 1.25rem;
}
.brand { display: flex; align-items: center; gap: .55rem; color: var(--ink); font-weight: 800; }
.brand:hover { text-decoration: none; }
.brand-mark { font-size: 1.5rem; }
.brand-text { letter-spacing: -.02em; }
.site-nav a { color: var(--muted); font-weight: 600; margin-left: 1.1rem; font-size: .95rem; }
.site-nav a:hover { color: var(--pink); }

.wrap { max-width: 860px; margin: 0 auto; padding: 1rem 1.25rem 4rem; }

.site-footer {
  max-width: 860px; margin: 0 auto; padding: 2rem 1.25rem 3rem;
  border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem;
}
.site-footer p { margin: .3rem 0; }

/* ---------- Home ---------- */
.hero { padding: 1rem 0 2rem; }
.hero h1 {
  font-size: clamp(2rem, 6vw, 3.2rem); line-height: 1.05; letter-spacing: -.03em;
  margin: 0 0 .5rem;
}
.hero .accent { color: var(--pink); }
.hero .lede { font-size: 1.15rem; color: var(--muted); max-width: 42ch; }

.total-banner {
  background: linear-gradient(135deg, var(--pink), var(--pink-soft));
  color: #fff; border-radius: 18px; padding: 1.5rem 1.75rem; margin: 1.5rem 0 2.5rem;
  box-shadow: var(--shadow);
}
.total-banner .big { font-size: clamp(2.4rem, 8vw, 3.6rem); font-weight: 800; letter-spacing: -.03em; line-height: 1; }
.total-banner .cap { opacity: .92; font-weight: 600; margin-top: .35rem; }
.total-banner .fine { opacity: .82; font-size: .85rem; margin-top: .5rem; }

.case-list { display: grid; gap: 1rem; }
.case-card {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 1.25rem 1.4rem; box-shadow: var(--shadow);
  color: var(--ink);
}
.case-card:hover { text-decoration: none; border-color: var(--pink-soft); transform: translateY(-1px); transition: .15s; }
.case-card .row { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.case-card .kicker { font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.case-card h3 { margin: .2rem 0 .4rem; font-size: 1.25rem; letter-spacing: -.02em; }
.case-card .tagline { color: var(--muted); margin: 0 0 .75rem; }
.case-card .card-metric { font-weight: 800; color: var(--pink); font-size: 1.35rem; white-space: nowrap; }
.case-card .card-metric small { font-weight: 600; color: var(--muted); font-size: .72rem; display: block; }

/* ---------- Case page ---------- */
.back { font-weight: 600; font-size: .9rem; }
.case-head { margin: 1rem 0 2rem; }
.case-num { font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.case-head h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); line-height: 1.08; letter-spacing: -.03em; margin: .3rem 0; }
.case-head .tagline { color: var(--muted); font-size: 1.1rem; max-width: 52ch; }

.headline-metric {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 1.5rem; text-align: center; margin: 1.5rem 0 1rem; box-shadow: var(--shadow);
}
.metric-range { font-size: clamp(2.5rem, 10vw, 4rem); font-weight: 800; letter-spacing: -.03em; line-height: 1; color: var(--pink); }
.metric-range .dash { color: var(--muted); font-weight: 400; margin: 0 .1em; }
.metric-label { font-weight: 600; margin-top: .4rem; }
.metric-headline { color: var(--muted); font-size: .95rem; margin-top: .4rem; }

.headline-metric.proof { border-color: var(--purple); }
.proof-tag { font-size: .8rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--purple); }
@media (prefers-color-scheme: dark) { .proof-tag { color: #b79be0; } }
.proof-line { font-size: clamp(1.4rem, 5vw, 2.1rem); font-weight: 800; letter-spacing: -.02em; margin: .4rem 0; color: var(--ink); }
.card-metric.proof-metric { color: var(--purple); }
@media (prefers-color-scheme: dark) { .card-metric.proof-metric { color: #b79be0; } }

.difficulty { display: inline-flex; align-items: center; gap: .6rem; padding: .4rem .9rem; border-radius: 999px; font-weight: 700; }
.difficulty .diff-label { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; opacity: .7; font-weight: 700; }
.difficulty .diff-value { text-transform: uppercase; letter-spacing: .04em; }
.difficulty-none    { background: rgba(23,163,74,.12); color: var(--ok); }
.difficulty-trivial { background: rgba(23,163,74,.12); color: var(--ok); }
.difficulty-easy    { background: rgba(230,0,126,.10); color: var(--pink); }
.difficulty-moderate{ background: rgba(74,43,122,.12); color: var(--purple); }
.difficulty-hard    { background: rgba(120,120,120,.15); color: var(--muted); }
@media (prefers-color-scheme: dark) { .difficulty-moderate { color: #b79be0; } }

.napkin { margin: 2rem 0; }
.napkin h2 { font-size: 1.15rem; display: flex; align-items: center; gap: .6rem; letter-spacing: -.01em; }
.tag { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; padding: .2rem .5rem; border-radius: 6px; }
.tag-fact { background: rgba(23,163,74,.14); color: var(--ok); }
.tag-est { background: rgba(230,0,126,.12); color: var(--pink); }

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: 12px; }
table.data { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
table.data th, table.data td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.data tr:last-child th, table.data tr:last-child td { border-bottom: 0; }
table.data thead th { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); background: rgba(0,0,0,.015); }
table.data th { font-weight: 600; }
table.data .val { font-weight: 700; white-space: nowrap; }
table.data .src { color: var(--muted); font-size: .85rem; text-align: right; }
table.data .num { text-align: right; font-family: var(--mono); font-weight: 600; white-space: nowrap; }
table.data .num.mid { color: var(--pink); }
table.data thead .mid { color: var(--pink); }
.note { display: block; font-weight: 400; color: var(--muted); font-size: .82rem; margin-top: .2rem; }

.fix-box { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--pink); border-radius: 12px; padding: 1.1rem 1.4rem; margin: 2rem 0; box-shadow: var(--shadow); }
.fix-box h2 { margin-top: 0; font-size: 1.1rem; }
.fix-box dl { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: .3rem 1rem; margin: 0; }
.fix-box dt { font-weight: 700; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; }
.fix-box dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }
@media (max-width: 560px) {
  .fix-box dl { grid-template-columns: 1fr; gap: .1rem; }
  .fix-box dt { margin-top: .6rem; }
}

.body { margin-top: 2rem; }
.body h2 { font-size: 1.25rem; letter-spacing: -.01em; margin-top: 2rem; }
.body h3 { font-size: 1.05rem; margin-top: 1.5rem; }
.body blockquote { border-left: 4px solid var(--pink-soft); margin: 1.5rem 0; padding: .5rem 0 .5rem 1.2rem; color: var(--muted); font-size: 1.05rem; font-style: italic; }
.body table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .92rem; }
.body table th, .body table td { text-align: left; padding: .55rem .7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.body table th { color: var(--muted); }
.body code { font-family: var(--mono); background: rgba(230,0,126,.08); padding: .1em .35em; border-radius: 4px; font-size: .88em; }
.body hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
.body img { max-width: 100%; height: auto; display: block; border-radius: 14px; border: 1px solid var(--line); margin: 1.5rem 0; box-shadow: var(--shadow); }
.diagram { margin: 1.75rem 0; padding: 1.25rem; background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
.diagram svg { width: 100%; height: auto; display: block; color: var(--ink); }
.diagram figcaption { margin-top: .75rem; font-size: .85rem; color: var(--muted); text-align: center; }
.dg-screen { fill: rgba(128,128,128,.10); stroke: currentColor; stroke-width: 2.4; }
.dg-cross { fill: rgba(23,163,74,.20); stroke: var(--ok); stroke-width: 1.6; }
.dg-wall { stroke: #e11d48; stroke-width: 5; stroke-linecap: round; }
.dg-label { fill: currentColor; font-family: var(--sans); font-weight: 600; }
.dg-mut { fill: var(--muted); font-family: var(--sans); }
.dg-ok { fill: var(--ok); font-family: var(--sans); font-weight: 700; }
.dg-bad { fill: #e11d48; font-family: var(--sans); font-weight: 700; }
.dg-cursor { fill: var(--pink); stroke: #fff; stroke-width: 1; }
@media (prefers-color-scheme: dark) { .dg-cursor { stroke: #000; } }
.body table { display: block; overflow-x: auto; white-space: normal; }

.callout { background: rgba(230,0,126,.06); border: 1px solid rgba(230,0,126,.18); border-radius: 12px; padding: 1rem 1.25rem; margin: 1.5rem 0; }
.callout strong { color: var(--pink); }

/* ---------- FYI / info box ---------- */
.info {
  background: rgba(37,99,235,.06); border: 1px solid rgba(37,99,235,.22);
  border-left: 4px solid #2563eb; border-radius: 12px;
  padding: 1rem 1.25rem 1.1rem; margin: 1.75rem 0;
}
.info::before {
  content: "↗ FYI — SOMEONE IS ALREADY FIGHTING THIS";
  display: block; font-size: .7rem; font-weight: 800; letter-spacing: .09em;
  color: #2563eb; margin-bottom: .5rem;
}
.info > :first-of-type { margin-top: 0; }
.info > :last-child { margin-bottom: 0; }
.info p, .info li { font-size: .95rem; }
.info a { color: #2563eb; text-decoration: underline; }
@media (prefers-color-scheme: dark) {
  .info { background: rgba(96,165,250,.08); border-color: rgba(96,165,250,.28); border-left-color: #60a5fa; }
  .info::before, .info a { color: #60a5fa; }
}

/* ---------- TODO / unresolved marker ---------- */
.todo {
  background: var(--warn-bg); border: 1px solid var(--warn-line);
  border-left: 4px solid var(--warn); border-radius: 12px;
  padding: 1rem 1.25rem 1.1rem; margin: 1.75rem 0;
}
.todo::before {
  content: "⚠ TODO — UNRESOLVED";
  display: block; font-size: .7rem; font-weight: 800; letter-spacing: .09em;
  color: var(--warn); margin-bottom: .5rem;
}
.todo > :first-of-type { margin-top: 0; }
.todo > :last-child { margin-bottom: 0; }
.todo p { font-size: .95rem; }
.todo a { color: var(--warn); text-decoration: underline; }

.todo-badge {
  display: inline-flex; align-items: center; gap: .45rem;
  background: var(--warn-bg); color: var(--warn); border: 1px solid var(--warn-line);
  padding: .4rem .9rem; border-radius: 999px; font-weight: 700; font-size: .82rem;
  margin-left: .5rem;
}
.card-todo {
  display: inline-block; background: var(--warn-bg); color: var(--warn);
  font-size: .68rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase;
  padding: .15rem .45rem; border-radius: 5px; margin-left: .5rem; vertical-align: middle;
}
@media (max-width: 560px) { .todo-badge { margin-left: 0; margin-top: .5rem; } }

.equation {
  font-family: var(--mono); font-size: 1.05rem; font-weight: 600;
  background: var(--card); border: 1px dashed var(--pink-soft); border-radius: 12px;
  padding: 1rem 1.25rem; margin: 1.25rem 0; text-align: center; overflow-x: auto;
}
.equation .op { color: var(--muted); margin: 0 .4em; }
.equation .eq { color: var(--pink); margin: 0 .4em; }
.equation .out { color: var(--pink); font-weight: 800; }

@media (max-width: 560px) {
  table.data th, table.data td { padding: .55rem .6rem; font-size: .92rem; }
  table.data .val { white-space: normal; }
  table.data .src { font-size: .78rem; }
  .headline-metric { padding: 1.15rem .75rem; }
  .total-banner { padding: 1.25rem 1.15rem; }
  .case-card .row { flex-direction: column; gap: .25rem; }
  .case-card .card-metric small { display: inline; margin-left: .3rem; }
  .equation { font-size: .95rem; padding: .85rem .75rem; }
}

/* ---------- platform pills + filter ---------- */
.pill { display: inline-flex; align-items: center; gap: .45em; font-size: .72rem; font-weight: 700;
  padding: .25rem .65rem; border-radius: 999px; background: rgba(128,128,128,.12); color: var(--muted);
  letter-spacing: .02em; line-height: 1; white-space: nowrap; }
.pill::before { content: ""; width: .5em; height: .5em; border-radius: 50%; background: var(--muted); flex: none; }
.pill.plat-google::before    { background: #4285f4; }
.pill.plat-apple::before     { background: #8e8e93; }
.pill.plat-microsoft::before { background: #00a4ef; }
.pill.plat-meta::before      { background: #0866ff; }
.pill.plat-web::before       { background: #17a34a; }
.pill.plat-linux::before     { background: #f59e0b; }
.pill.plat-apps::before      { background: #e6007e; }
.pill.plat-government::before{ background: #b45309; }
.pill.plat-anthropic::before { background: #d97757; }
.pill.plat-github::before    { background: #8957e5; }
.pill.plat-openai::before    { background: #10a37f; }
.platform-tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .8rem; }

.filter-bar { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 1.5rem; }
.filter-bar .pill { cursor: pointer; border: 1px solid var(--line); background: var(--card); padding: .4rem .8rem; font-size: .78rem; }
.filter-bar .pill span { opacity: .55; font-weight: 600; margin-left: .1em; }
.filter-bar .pill.active { background: var(--pink); color: #fff; border-color: var(--pink); }
.filter-bar .pill.active::before { background: #fff; }
.filter-bar .pill.active span { opacity: .8; }

/* methodology / prose pages */
.prose h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); letter-spacing: -.03em; }
.prose h2 { margin-top: 2rem; letter-spacing: -.01em; }
.prose { max-width: 68ch; }