/* ═══════════════════════════════════════════════════════════
   SKETCH LAB — page-specific styles. Editorial chrome inherits
   from main.css; this file adds the demo, prediction panel,
   adversarial gallery, and receipts grid.
   ═══════════════════════════════════════════════════════════ */

.sk-main {
  background: var(--paper);
  color: var(--ink);
}

/* ── Hero ───────────────────────────────────────────────────── */
.sk-hero {
  padding: 120px 48px 60px;
  max-width: 1200px;
}
.sk-title {
  margin-top: 22px;
}
.sk-kicker {
  margin-top: 24px;
  max-width: 720px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.sk-dateline {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  max-width: 900px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.sk-dateline .label {
  color: var(--ink-dim);
}
.sk-dateline .value {
  color: var(--ink);
  margin-top: 4px;
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: 12px;
}

/* ── Section wrapper ───────────────────────────────────────── */
.sk-section {
  padding: 80px 48px;
  max-width: 1200px;
}
.sk-section .section-label {
  margin-bottom: 28px;
}
.sk-prose {
  max-width: 720px;
}
.sk-prose p {
  margin-top: 18px;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
}
.sk-lede {
  font-family: "Newsreader", Georgia, serif;
  font-style: italic;
  font-size: 22px !important;
  line-height: 1.4 !important;
  color: var(--ink) !important;
}
.sk-note {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 36px;
}

/* ── Demo: canvas + predictions side-by-side ────────────────── */
.sk-demo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 40px;
  align-items: start;
}

/* Canvas with thick black border, like a research instrument */
.sk-canvas-wrap {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.sk-canvas-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 2px solid var(--ink);
  background: #ffffff;
}
#sk-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}
.sk-canvas-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  pointer-events: none;
  transition: opacity 200ms;
}
.sk-canvas-empty.hidden {
  opacity: 0;
}

.sk-canvas-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  flex-wrap: wrap;
}
.sk-tool-btn {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 8px 14px;
  font-family: "DM Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 180ms, color 180ms, opacity 180ms;
}
.sk-tool-btn:hover:not(:disabled) {
  background: var(--ink);
  color: var(--paper);
}
.sk-tool-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.sk-stroke-count,
.sk-session-count {
  margin-left: auto;
}
.sk-session-count {
  margin-left: 0;
}

/* ── Predictions panel ─────────────────────────────────────── */
.sk-predictions {
  border: 1px solid var(--ink);
  padding: 22px 22px 18px;
  background: var(--paper);
  position: relative;
}
.sk-pred-head {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-bottom: 1px solid var(--ink-dim);
  padding-bottom: 8px;
  margin-bottom: 14px;
}
.sk-pred-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.sk-pred-row {
  display: grid;
  grid-template-columns: 1fr 1fr 56px;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  line-height: 1.1;
  transition: color 200ms;
}
.sk-pred-row[data-rank="1"] .sk-pred-name { color: var(--ink); font-size: 22px; }
.sk-pred-row[data-rank="2"] .sk-pred-name { color: var(--ink); opacity: 0.78; }
.sk-pred-row[data-rank="3"] .sk-pred-name { color: var(--ink); opacity: 0.55; }
.sk-pred-row.match .sk-pred-name { color: var(--accent); }
.sk-pred-name {
  font-family: "Newsreader", Georgia, serif;
  font-style: italic;
}
.sk-pred-bar {
  display: block;
  height: 6px;
  background: rgba(0, 0, 0, 0.08);
  border-radius: 0;
  overflow: hidden;
  position: relative;
}
.sk-pred-fill {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--ink);
  transition: width 280ms cubic-bezier(0.5, 0.05, 0.2, 1);
}
.sk-pred-row.match .sk-pred-fill {
  background: var(--accent);
}
.sk-pred-score {
  text-align: right;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

/* Target / match indicator */
.sk-target-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 18px;
  padding: 12px 0 10px;
  border-top: 1px solid var(--ink-dim);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.sk-target-row .label {
  color: var(--ink-dim);
}
.sk-target-row .serif-italic {
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 18px;
  color: var(--ink);
}
.sk-target-status {
  margin-left: auto;
  color: var(--ink-soft);
  text-transform: none;
  letter-spacing: 0.04em;
}
.sk-target-status.match {
  color: var(--accent);
  font-weight: 500;
}

/* Stroke-history list — narrative of how prediction shifted */
.sk-history {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--ink-dim);
}
.sk-history-head {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 10px;
}
.sk-history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 240px;
  overflow-y: auto;
}
.sk-history-list li {
  display: grid;
  grid-template-columns: 60px 1fr 50px;
  gap: 10px;
  align-items: baseline;
  color: var(--ink-soft);
  padding: 4px 0;
  border-bottom: 1px dotted var(--ink-dim);
}
.sk-history-list li:last-child {
  border-bottom: none;
}
.sk-history-list li .h-stroke {
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 10px;
}
.sk-history-list li .h-name {
  color: var(--ink);
  font-family: "Newsreader", Georgia, serif;
  font-style: italic;
  font-size: 14px;
}
.sk-history-list li .h-score {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}
.sk-history-empty {
  color: var(--ink-dim) !important;
  border-bottom: none !important;
  display: block !important;
  padding: 10px 0 !important;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 10px !important;
}

.sk-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 240, 230, 0.92);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: opacity 220ms;
}
.sk-loading.hidden {
  opacity: 0;
  pointer-events: none;
}

/* ── Suggestions row ──────────────────────────────────────── */
.sk-suggestions {
  margin-top: 36px;
  padding: 22px 0 0;
  border-top: 1px solid var(--ink-dim);
}
.sk-suggest-head {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 14px;
}
.sk-suggest-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.sk-suggest-btn {
  background: transparent;
  border: 1px solid var(--ink-dim);
  color: var(--ink-soft);
  padding: 6px 14px;
  border-radius: 999px;
  font-family: "Newsreader", Georgia, serif;
  font-style: italic;
  font-size: 16px;
  cursor: pointer;
  transition: background 180ms, color 180ms, border-color 180ms;
}
.sk-suggest-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.sk-suggest-btn.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* ── How it works grid ────────────────────────────────────── */
.sk-how-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  margin-top: 12px;
}
.sk-how-card {
  border-top: 1px solid var(--ink);
  padding-top: 18px;
}
.sk-how-fig {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.sk-how-title {
  font-size: 26px;
  line-height: 1.15;
  letter-spacing: -0.015em;
  font-weight: 400;
  margin: 0 0 12px;
}
.sk-how-card p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
}

/* ── Adversarial gallery ──────────────────────────────────── */
.sk-adversarial {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--ink);
  margin-top: 16px;
}
.sk-adv-card {
  padding: 22px 20px;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sk-adv-card:nth-child(3n) { border-right: none; }
.sk-adv-card:nth-last-child(-n+3) { border-bottom: none; }
.sk-adv-rank {
  font-family: "DM Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.sk-adv-pair {
  font-family: "Newsreader", Georgia, serif;
  font-size: 22px;
  line-height: 1.2;
}
.sk-adv-pair .true {
  color: var(--ink);
}
.sk-adv-pair .arrow {
  color: var(--ink-dim);
  font-style: italic;
  margin: 0 6px;
}
.sk-adv-pair .pred {
  color: var(--accent);
  font-style: italic;
}
.sk-adv-rate {
  font-family: "DM Mono", monospace;
  font-size: 12px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  margin-top: auto;
}
.sk-adv-empty {
  grid-column: 1 / -1;
  padding: 40px;
  text-align: center;
  color: var(--ink-dim);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* ── Receipts grid ────────────────────────────────────────── */
.sk-receipts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--ink);
  margin-top: 16px;
}
.sk-receipt {
  padding: 22px 20px;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.sk-receipt:nth-child(4n) { border-right: none; }
.sk-receipt:nth-last-child(-n+4) { border-bottom: none; }
.sk-receipt-label {
  font-family: "DM Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 8px;
}
.sk-receipt-value {
  font-family: "Newsreader", Georgia, serif;
  font-size: 32px;
  line-height: 1;
  color: var(--ink);
}
.sk-receipt-value .small {
  font-size: 18px;
  color: var(--ink-soft);
  margin-left: 4px;
}

.sk-colophon-section {
  padding-bottom: 80px;
}

/* ── Mobile ───────────────────────────────────────────────── */
@media (max-width: 900px) {
  .sk-hero, .sk-section { padding-left: 24px; padding-right: 24px; }
  .sk-demo-layout { grid-template-columns: 1fr; }
  .sk-how-grid { grid-template-columns: 1fr; gap: 24px; }
  .sk-adversarial { grid-template-columns: 1fr; }
  .sk-adv-card { border-right: none; }
  .sk-adv-card:nth-last-child(-n+3) { border-bottom: 1px solid var(--ink); }
  .sk-adv-card:last-child { border-bottom: none; }
  .sk-receipts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sk-receipt:nth-child(4n) { border-right: 1px solid var(--ink); }
  .sk-receipt:nth-child(2n) { border-right: none; }
  .sk-canvas-tools { font-size: 10px; }
  .sk-stroke-count, .sk-session-count { margin-left: 0; }
  .sk-dateline { grid-template-columns: 1fr; gap: 14px; }
}
@media (max-width: 540px) {
  .sk-receipts { grid-template-columns: 1fr; }
  .sk-receipt { border-right: none; }
}