/* Aftermark — ink/paper + indigo accent */
:root {
  --ink: #1e1b4b;
  --ink-soft: #3730a3;
  --accent: #4f46e5;
  --accent-2: #6366f1;
  --accent-soft: #eef2ff;
  --paper: #f8f7f4;
  --card: #ffffff;
  --text: #1c1917;
  --secondary: #57534e;
  --border: #e7e5e4;
  --claim: #c7d2fe;
  --evidence: #bbf7d0;
  --contrast: #fde68a;
  --attitude: #fbcfe8;
  --danger: #b91c1c;
  --ok: #15803d;
  --radius: 14px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
  --banner-h: 34px;
  --tab-h: 64px;
  --nav-h: 56px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0c0a09;
    --card: #1c1917;
    --text: #f5f5f4;
    --secondary: #a8a29e;
    --border: #292524;
    --accent-soft: #1e1b4b;
    --ink: #e0e7ff;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100%;
  font-family: var(--font);
  font-size: 16px; line-height: 1.45;
  color: var(--text); background: var(--paper);
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}
body {
  padding-top: calc(var(--banner-h) + var(--safe-top));
  padding-bottom: calc(var(--tab-h) + var(--safe-bottom));
}
.prototype-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 2000;
  height: calc(var(--banner-h) + var(--safe-top));
  padding: var(--safe-top) 12px 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--ink); color: #e0e7ff;
  font-size: 11px; font-weight: 600; letter-spacing: 0.02em;
}
#app { min-height: calc(100dvh - var(--banner-h) - var(--tab-h) - var(--safe-top) - var(--safe-bottom)); }
.tab-panel { display: flex; flex-direction: column; min-height: inherit; }
.tab-panel[hidden] { display: none !important; }

.nav-header {
  position: sticky; top: calc(var(--banner-h) + var(--safe-top)); z-index: 50;
  min-height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-header h1 { margin: 0; font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; color: var(--ink); }
.header-sub { margin: 2px 0 0; font-size: 12px; color: var(--secondary); }
.header-right { display: flex; align-items: center; gap: 8px; }
.scroll { padding: 12px 16px 28px; display: flex; flex-direction: column; gap: 12px; }
.pad-x { padding: 0 4px; }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px;
  box-shadow: 0 1px 2px rgba(28,25,23,0.04);
}
.soft-accent { background: var(--accent-soft); border-color: #c7d2fe; }
.countdown-card { background: linear-gradient(145deg, var(--accent-soft), var(--card)); }
.eyebrow { margin: 0 0 4px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); }
.muted { color: var(--secondary); }
.small { font-size: 13px; }
.tiny { font-size: 11px; }
.section-title { margin: 8px 0 4px; font-size: 1rem; }

.score-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.score-num { margin: 0; font-size: 1.35rem; font-weight: 700; color: var(--ink); }
.protein-note {
  margin: 0; padding: 10px 12px; border-radius: 10px;
  background: #fff7ed; border: 1px dashed #fdba74; color: #9a3412; font-size: 13px; font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  .protein-note { background: #431407; border-color: #9a3412; color: #fed7aa; }
}

.block-card {
  display: grid; grid-template-columns: 40px 1fr auto; gap: 12px; align-items: start;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px;
}
.block-num {
  width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--ink); color: #fff; font-weight: 700;
}
.block-body h3 { margin: 0 0 4px; font-size: 1.05rem; }
.check { color: var(--ok); font-size: 1.4rem; font-weight: 700; padding-top: 6px; }

.btn {
  appearance: none; border: none; cursor: pointer;
  font: inherit; font-weight: 600; border-radius: 12px;
  padding: 12px 16px; background: var(--border); color: var(--text);
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); }
.btn-ghost { background: transparent; border: 1px solid var(--border); }
.btn-sm { padding: 8px 12px; font-size: 13px; border-radius: 10px; }
.btn-block { width: 100%; display: block; margin-top: 8px; }
.btn-again { background: #fecaca; color: #7f1d1d; }
.btn-hard { background: #fed7aa; color: #9a3412; }
.btn-good { background: #bbf7d0; color: #14532d; }
.btn-easy { background: #c7d2fe; color: #312e81; }
.icon-btn {
  appearance: none; border: none; background: var(--accent-soft);
  width: 36px; height: 36px; border-radius: 10px; font-size: 16px; cursor: pointer; color: var(--ink);
}
.linkish {
  appearance: none; border: none; background: none; color: var(--accent);
  font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; text-decoration: underline;
  padding: 8px; display: block; margin: 8px auto 0; text-align: center;
}
.linkish.inline { display: inline; margin: 0; padding: 0; font-size: 11px; }

.trial-badge {
  font-size: 11px; font-weight: 700; padding: 4px 8px; border-radius: 999px;
  background: var(--accent); color: #fff;
}
.flag {
  margin: 10px 0 0; padding: 10px 12px; border-radius: 10px;
  background: var(--accent-soft); color: var(--ink-soft); font-size: 13px; font-weight: 600;
}

.tab-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 100;
  height: calc(var(--tab-h) + var(--safe-bottom));
  padding: 6px 4px var(--safe-bottom);
  display: grid; grid-template-columns: repeat(5, 1fr);
  background: color-mix(in srgb, var(--card) 94%, transparent);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
}
.tab {
  appearance: none; border: none; background: none; cursor: pointer;
  font: inherit; font-size: 10px; font-weight: 600; color: var(--secondary);
  display: flex; flex-direction: column; align-items: center; gap: 2px; position: relative;
}
.tab span { font-size: 18px; line-height: 1; }
.tab.active { color: var(--accent); }
.badge {
  position: absolute; top: -2px; right: 18%;
  min-width: 16px; height: 16px; padding: 0 4px; border-radius: 999px;
  background: var(--accent); color: #fff; font-size: 10px; line-height: 16px;
}

.overlay {
  position: fixed; inset: 0; z-index: 3000;
  background: rgba(28,25,23,0.45);
  display: flex; align-items: flex-end; justify-content: center;
  padding: 12px; padding-bottom: calc(12px + var(--safe-bottom));
}
.overlay.full { align-items: stretch; padding: 0; background: var(--paper); padding-top: calc(var(--banner-h) + var(--safe-top)); }
.overlay[hidden] { display: none !important; }
.ob-card {
  width: min(480px, 100%); max-height: min(92dvh, 900px); overflow: auto;
  background: var(--card); border-radius: 20px; padding: 20px 18px 16px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.ob-progress { height: 4px; background: var(--border); border-radius: 99px; margin-bottom: 12px; }
.ob-bar { height: 100%; width: 20%; background: var(--accent); border-radius: 99px; transition: width .2s; }
.ob-actions { display: flex; gap: 8px; margin-top: 16px; }
.ob-actions .btn { flex: 1; }
.ob-card h2 { margin: 0 0 8px; font-size: 1.4rem; color: var(--ink); }
.chip-grid { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.chip {
  appearance: none; border: 1px solid var(--border); background: var(--paper);
  padding: 10px 14px; border-radius: 999px; font: inherit; font-weight: 600; cursor: pointer; color: var(--text);
}
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.form label { display: block; font-size: 13px; font-weight: 600; margin: 10px 0; color: var(--secondary); }
.form input, .form select, .form textarea {
  display: block; width: 100%; margin-top: 6px;
  padding: 12px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--paper); color: var(--text); font: inherit;
}
.form textarea { min-height: 72px; resize: vertical; }
.plan-grid { display: flex; flex-direction: column; gap: 8px; margin: 14px 0; }
.plan-opt {
  text-align: left; padding: 12px 14px; border-radius: 12px;
  border: 2px solid var(--border); background: var(--paper); cursor: pointer; font: inherit;
}
.plan-opt.on { border-color: var(--accent); background: var(--accent-soft); }
.plan-opt strong { display: block; color: var(--ink); }
.plan-opt.featured { border-color: var(--accent); }
.gift-note { font-size: 13px; background: #ecfdf5; border-radius: 10px; padding: 10px; color: #065f46; }
@media (prefers-color-scheme: dark) {
  .gift-note { background: #064e3b; color: #a7f3d0; }
}

.seg { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; background: var(--border); padding: 4px; border-radius: 12px; }
.seg-btn {
  appearance: none; border: none; background: transparent; border-radius: 10px;
  padding: 8px; font: inherit; font-size: 13px; font-weight: 600; color: var(--secondary); cursor: pointer;
}
.seg-btn.active { background: var(--card); color: var(--ink); box-shadow: 0 1px 2px rgba(0,0,0,.06); }

.list { display: flex; flex-direction: column; gap: 8px; }
.list-item {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px; text-align: left; font: inherit; cursor: pointer; color: var(--text);
}
.list-item h4 { margin: 0 0 4px; font-size: 0.95rem; }
.sm2-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-top: 12px; }
.sm2-row .btn { padding: 10px 4px; font-size: 12px; }

.pie-wrap { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.pie {
  width: 120px; height: 120px; border-radius: 50%;
  background: conic-gradient(var(--accent) 0deg, #a5b4fc 0deg);
}
.legend { font-size: 12px; color: var(--secondary); }
.legend div { margin: 4px 0; }
.heat { display: flex; flex-wrap: wrap; gap: 6px; }
.heat span {
  font-size: 11px; padding: 6px 8px; border-radius: 8px;
  background: var(--accent-soft); color: var(--ink-soft); font-weight: 600;
}

.drill-list { display: flex; flex-direction: column; gap: 10px; }
.drill-card {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px;
  text-align: left; font: inherit; cursor: pointer; color: var(--text); width: 100%;
}
.drill-card h3 { margin: 0 0 4px; font-size: 1rem; }
.drill-card .locked { font-size: 11px; color: #b45309; font-weight: 700; }

.player-shell { display: flex; flex-direction: column; height: 100%; width: 100%; max-width: 720px; margin: 0 auto; }
.player-header {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 8px 12px; border-bottom: 1px solid var(--border); background: var(--card);
}
.player-title { margin: 0; flex: 1; font-size: 1rem; }
.timer {
  font-variant-numeric: tabular-nums; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); padding: 6px 10px; border-radius: 8px; font-size: 14px;
}
.timer.warn { color: #b45309; background: #fff7ed; }
.hl-modes { display: flex; flex-wrap: wrap; gap: 4px; width: 100%; }
.hl-btn {
  appearance: none; border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 8px; font-size: 11px; font-weight: 700; cursor: pointer; background: var(--paper); color: var(--text);
}
.hl-btn.claim.on, .para.hl-Claim { background: var(--claim); }
.hl-btn.evidence.on, .para.hl-Evidence { background: var(--evidence); }
.hl-btn.contrast.on, .para.hl-Contrast { background: var(--contrast); }
.hl-btn.attitude.on, .para.hl-Attitude { background: var(--attitude); }
.hl-btn.on { outline: 2px solid var(--accent); }
.player-scroll { flex: 1; overflow: auto; padding: 16px; padding-bottom: 40px; }

.cars-passage { font-family: var(--serif); font-size: 1.12rem; line-height: 1.65; }
.cars-passage h2 { font-family: var(--font); font-size: 1.25rem; margin: 0 0 12px; color: var(--ink); }
.para {
  margin: 0 0 14px; padding: 8px 10px; border-radius: 8px; cursor: pointer;
  transition: background .15s;
}
.para:active { opacity: 0.9; }
.q-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin: 12px 0; }
.q-card h4 { margin: 0 0 8px; }
.choice {
  display: block; width: 100%; text-align: left; margin: 6px 0; padding: 10px 12px;
  border-radius: 10px; border: 1px solid var(--border); background: var(--paper);
  font: inherit; cursor: pointer; color: var(--text);
}
.choice.selected { border-color: var(--accent); background: var(--accent-soft); }
.choice.correct { border-color: var(--ok); background: #dcfce7; }
.choice.wrong { border-color: var(--danger); background: #fee2e2; }
.explain { font-size: 13px; margin-top: 8px; color: var(--secondary); }
.reader128 {
  margin-top: 12px; padding: 12px; border-radius: 12px;
  background: var(--accent-soft); border-left: 4px solid var(--accent); font-size: 14px;
}

.disclaimer { font-size: 11px; color: var(--secondary); text-align: center; line-height: 1.4; margin: 8px 0 0; }
.disclaimer.tiny { margin-top: 12px; }

.toggle-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 0; border-bottom: 1px solid var(--border); font-size: 14px;
}
.toggle {
  width: 48px; height: 28px; border-radius: 999px; border: none;
  background: var(--border); position: relative; cursor: pointer;
}
.toggle.on { background: var(--accent); }
.toggle::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 22px; height: 22px; border-radius: 50%; background: #fff;
  transition: left .15s;
}
.toggle.on::after { left: 23px; }

.empty-hint { text-align: center; padding: 20px; }