/* proof.css — cookbook proof infographics at /proof and /proof/{slug}.
 *
 * Reached from the sales deck (one clickable card per proof) and
 * shareable on their own. Dark theme to match the deck universe a
 * reader clicks in from. Loaded after app.css alongside css/fonts.css
 * (RFC 006: hermetic Go + templ + native CSS, no JS, no build step).
 */

.proof,
.proof-index {
  --font-sans: 'Geist', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'Courier New', monospace;
  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-body: var(--font-sans);
  --font-display: var(--font-serif);
  font-family: var(--font-body);
  color: var(--fg);
  background: var(--bg);
  max-width: 60rem;
  margin: 0 auto;
  padding: clamp(var(--size-5), 5vw, var(--size-8)) clamp(var(--size-4), 5vw, var(--size-7)) var(--size-9);
  min-height: 100vh;
  min-height: 100dvh;
}

/* ── Back link + head ────────────────────────────────────────── */

.proof-back {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--font-size-0);
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  text-decoration: none;
  margin-bottom: var(--size-6);
}

.proof-back:hover { color: var(--accent); }

.proof-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--font-size-0);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--size-2);
}

.proof-head h1,
.proof-index-head h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.05;
  margin: 0 0 var(--size-3);
  color: var(--fg);
}

.proof-tagline,
.proof-index-lede {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  line-height: 1.55;
  color: var(--fg-soft);
  margin: 0 0 var(--size-4);
  max-width: 44rem;
}

/* ── Chips ───────────────────────────────────────────────────── */

.proof-head-chips,
.proof-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--size-2);
}

.proof-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.25em 0.7em;
  border-radius: 999px;
  border: 1px solid var(--rule);
  color: var(--fg-soft);
  background: color-mix(in oklab, var(--bg-elev) 60%, transparent);
  white-space: nowrap;
}

.proof-chip-reg {
  color: var(--warn);
  border-color: color-mix(in oklab, var(--warn) 45%, var(--rule));
  background: color-mix(in oklab, var(--warn) 10%, transparent);
}

.proof-chip-action {
  color: var(--accent);
  border-color: color-mix(in oklab, var(--accent) 45%, var(--rule));
  background: color-mix(in oklab, var(--accent) 10%, transparent);
}

/* ── Without → With contrast ─────────────────────────────────── */

.proof-contrast {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: var(--size-3);
  margin: var(--size-7) 0;
}

.proof-side {
  display: flex;
  flex-direction: column;
  gap: var(--size-2);
  padding: var(--size-5);
  border: 1px solid var(--rule);
  border-radius: var(--radius-3, 12px);
  background: var(--bg-elev);
}

.proof-side-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-0);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.proof-side-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 1;
}

.proof-side-detail {
  font-size: var(--font-size-1);
  color: var(--fg-soft);
  line-height: 1.45;
}

.proof-without .proof-side-value { color: var(--danger); }
.proof-with .proof-side-value { color: var(--ok); }

.proof-without {
  border-color: color-mix(in oklab, var(--danger) 35%, var(--rule));
  background: color-mix(in oklab, var(--danger) 6%, var(--bg-elev));
}

.proof-with {
  border-color: color-mix(in oklab, var(--ok) 35%, var(--rule));
  background: color-mix(in oklab, var(--ok) 6%, var(--bg-elev));
}

/* count-unit proofs read the "without" as a tally, not a loss —
 * soften the red so it doesn't imply dollars. */
.proof-contrast.is-count .proof-without {
  border-color: color-mix(in oklab, var(--warn) 35%, var(--rule));
  background: color-mix(in oklab, var(--warn) 6%, var(--bg-elev));
}
.proof-contrast.is-count .proof-without .proof-side-value { color: var(--warn); }

.proof-gate {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--size-2);
  padding: 0 var(--size-2);
}

.proof-gate-action {
  font-family: var(--font-mono);
  font-size: var(--font-size-0);
  color: var(--accent);
  letter-spacing: 0.04em;
}

.proof-gate-arrow {
  font-family: var(--font-mono);
  font-size: var(--font-size-0);
  color: var(--fg-muted);
  text-align: center;
}

/* ── The loop ────────────────────────────────────────────────── */

.proof-loop {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--size-3);
  margin: var(--size-7) 0;
}

.proof-loop-step {
  display: flex;
  flex-direction: column;
  gap: var(--size-2);
  padding: var(--size-4);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-2, 8px);
  background: color-mix(in oklab, var(--bg-elev) 55%, transparent);
}

.proof-loop-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: var(--font-size-0);
  color: var(--accent);
  border: 1px solid color-mix(in oklab, var(--accent) 40%, var(--rule));
  background: color-mix(in oklab, var(--accent) 10%, transparent);
}

.proof-loop-text {
  font-size: var(--font-size-1);
  line-height: 1.45;
  color: var(--fg-soft);
}

.proof-loop-text code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-code);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  /* --bg-code is always near-black; on the light proof/deck themes
     var(--fg) is dark, which made the chip text invisible. Force light
     text so the action/state token is legible on the dark chip
     regardless of theme (mirrors prose.css). */
  color: #e8eaf0;
}

.proof-allow { color: var(--ok); }
.proof-block { color: var(--danger); }

/* ── Scenario + why ──────────────────────────────────────────── */

.proof-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--size-5);
  margin: var(--size-7) 0;
}

.proof-detail-block h2 {
  font-family: var(--font-display);
  font-size: var(--font-size-4);
  margin: 0 0 var(--size-3);
  color: var(--fg);
}

.proof-detail-block p {
  font-size: var(--font-size-2);
  line-height: 1.6;
  color: var(--fg-soft);
  margin: 0;
}

/* ── Footers ─────────────────────────────────────────────────── */

.proof-foot,
.proof-index-foot {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--size-3);
  margin-top: var(--size-7);
  padding-top: var(--size-4);
  border-top: 1px solid var(--rule-soft);
}

.proof-foot-link,
.proof-index-foot a {
  font-family: var(--font-mono);
  font-size: var(--font-size-0);
  color: var(--fg-muted);
  text-decoration: none;
}

.proof-foot-link:hover,
.proof-index-foot a:hover { color: var(--accent); }

/* ── Index grid + cards ──────────────────────────────────────── */

.proof-index-head { margin-bottom: var(--size-6); }

.proof-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--size-4);
}

.proof-card {
  display: flex;
  flex-direction: column;
  gap: var(--size-3);
  height: 100%;
  padding: var(--size-5);
  border: 1px solid var(--rule);
  border-radius: var(--radius-3, 12px);
  background: var(--bg-elev);
  text-decoration: none;
  transition: border-color 120ms ease, transform 120ms ease;
}

.proof-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.proof-card-risk {
  font-family: var(--font-display);
  font-size: var(--font-size-3);
  color: var(--fg);
}

.proof-card-nums {
  display: flex;
  align-items: baseline;
  gap: var(--size-2);
  font-family: var(--font-mono);
}

.proof-card-without {
  font-size: var(--font-size-2);
  color: var(--danger);
  text-decoration: line-through;
  text-decoration-color: color-mix(in oklab, var(--danger) 60%, transparent);
}

.proof-card-count .proof-card-without { color: var(--warn); }

.proof-card-arrow { color: var(--fg-muted); }

.proof-card-with {
  font-size: var(--font-size-4);
  color: var(--ok);
}

.proof-card-tagline {
  font-size: var(--font-size-1);
  line-height: 1.45;
  color: var(--fg-soft);
  flex: 1;
}

/* ── Mobile ──────────────────────────────────────────────────── */

@media (max-width: 760px) {
  .proof-contrast {
    grid-template-columns: 1fr;
  }
  .proof-gate { padding: var(--size-2) 0; }
  .proof-gate-arrow { transform: none; }
  .proof-loop { grid-template-columns: 1fr 1fr; }
  .proof-detail { grid-template-columns: 1fr; gap: var(--size-5); }
}

@media (max-width: 420px) {
  .proof-loop { grid-template-columns: 1fr; }
}