/* ===========================================================================
   Detect & Correct — poster demo styles
   Mobile-first, large tap targets, medical / ECG aesthetic.
   =========================================================================== */

:root {
  --bg: #0b1020;
  --bg-panel: #141b30;
  --bg-panel-2: #1b2440;
  --ink: #eef2ff;
  --ink-dim: #9aa7c7;
  --line: #2a3557;
  --accent: #4da3ff;
  --accent-ink: #06122a;
  --good: #34d399;
  --good-bg: #0f2e24;
  --bad: #f87171;
  --bad-bg: #331416;
  --warn: #fbbf24;
  --ecg-trace: #35e08f;
  --ecg-grid: rgba(255, 90, 90, 0.16);
  --ecg-grid-strong: rgba(255, 90, 90, 0.30);
  --ecg-bg: #0a0f1e;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --maxw: 560px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.app {
  flex: 1;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 16px 24px;
  display: flex;
  flex-direction: column;
}

/* ---- Typography ---- */
h1, h2, h3 { margin: 0 0 8px; line-height: 1.15; }
h1 { font-size: 1.5rem; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; }
p { margin: 0 0 12px; color: var(--ink-dim); line-height: 1.5; }
.muted { color: var(--ink-dim); }
.tiny { font-size: 0.8rem; }

/* ---- Header ---- */
.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  min-height: 40px;
}
.topbar .back {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 0.95rem;
  cursor: pointer;
}
.topbar .crumb {
  color: var(--ink-dim);
  font-size: 0.9rem;
}

/* ---- Cards / panels ---- */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

/* ---- Home / case picker ---- */
.hero {
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
  padding: 28px 20px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--ecg-bg);
  box-shadow: var(--shadow);
}
.hero > * { position: relative; z-index: 1; }
.hero h1 { color: #eef2ff; }

/* Animated ECG-monitor backdrop: grid + a looping heartbeat trace. */
.hero-ecg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--ecg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--ecg-grid) 1px, transparent 1px),
    linear-gradient(var(--ecg-grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--ecg-grid-strong) 1px, transparent 1px);
  background-size: 8px 8px, 8px 8px, 40px 40px, 40px 40px;
}
.hero-ecg::after {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 90px;
  transform: translateY(-50%);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 230 90'%3E%3Cpath d='M0,45 L36,45 L44,40 L50,34 L56,40 L64,45 L80,45 L88,50 L94,50 L98,8 L104,80 L110,48 L118,45 L136,45 L146,38 L156,30 L166,38 L176,45 L230,45' fill='none' stroke='%2335e08f' stroke-width='2' stroke-linejoin='round' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-size: 230px 90px;
  opacity: 0.55;
  animation: ecgScroll 4s linear infinite;
}
@keyframes ecgScroll {
  from { background-position-x: 0; }
  to { background-position-x: -230px; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-ecg::after { animation: none; }
}

.hero .badge {
  display: inline-block;
  background: rgba(10, 15, 30, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--ecg-trace);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.case-card {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.08s ease, border-color 0.15s ease;
}
.case-card:active { transform: scale(0.99); }
.case-card:hover { border-color: var(--accent); }
.case-card .num {
  flex: 0 0 auto;
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid; place-items: center;
  font-weight: 700;
  background: var(--bg-panel-2);
  border: 1px solid var(--line);
  color: var(--accent);
}
.case-card .meta { flex: 1; min-width: 0; }
.case-card .meta .t { font-weight: 650; }
.case-card .chev { color: var(--ink-dim); font-size: 1.3rem; }

/* ---- Prominent quiz cards (About section) ---- */
.about-quiz-row .case-card {
  background: #0a0f1e;
  border: 1px solid #2a3557;
  padding: 24px 20px;
}
.about-quiz-row .case-card, .about-quiz-row .case-card * { color: #fff; }
.about-quiz-row .case-card:hover { border-color: #4da3ff; }
.about-quiz-row .case-card .num {
  width: 48px; height: 48px;
  background: #4da3ff;
  border: none;
  font-size: 1.15rem;
  color: #06122a;
}
.about-quiz-row .case-card .meta .t { font-size: 1.3rem; font-weight: 800; }
.about-quiz-row .case-card .ecg-icon {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
}
.about-quiz-row .case-card .chev { color: rgba(255,255,255,0.6); }

/* ---- Buttons ---- */
.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--bg-panel-2);
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 16px 18px;
  border-radius: 14px;
  cursor: pointer;
  width: 100%;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:active { transform: scale(0.98); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.ghost { background: transparent; }
.btn-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 8px; }
.btn-stack { display: grid; gap: 12px; margin-top: 8px; }

.choice { text-align: left; position: relative; }
.choice.selected { border-color: var(--accent); }
.choice.correct { border-color: var(--good); background: var(--good-bg); }
.choice.wrong { border-color: var(--bad); background: var(--bad-bg); }

/* ---- ECG plot ---- */
.ecg-wrap {
  background: var(--ecg-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px;
  overflow-x: auto;
}
.ecg-canvas { display: block; width: 100%; height: auto; }
.ecg-caption {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.8rem; color: var(--ink-dim); margin: 8px 2px 0;
}
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.78rem; font-weight: 600;
  padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg-panel-2);
}
.pill.recorded { color: var(--warn); }
.pill.corrected { color: var(--good); }

/* ---- Result banner ---- */
.result-banner {
  display: flex; align-items: center; gap: 12px;
  border-radius: 14px; padding: 14px 16px; margin-bottom: 16px;
  font-weight: 700; font-size: 1.15rem;
  border: 1px solid var(--line);
}
.result-banner.good { background: var(--good-bg); border-color: var(--good); color: var(--good); }
.result-banner.bad { background: var(--bad-bg); border-color: var(--bad); color: var(--bad); }
.result-banner.neutral { background: var(--bg-panel-2); color: var(--ink); }
.result-banner .ico { font-size: 1.4rem; }

/* ---- Prediction readout ---- */
.readout { display: grid; gap: 10px; }
.readout .row {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px; padding-bottom: 10px; border-bottom: 1px dashed var(--line);
}
.readout .row:last-child { border-bottom: 0; padding-bottom: 0; }
.readout .k { color: var(--ink-dim); font-size: 0.9rem; }
.readout .v { font-weight: 700; text-align: right; }
.readout .v .sub { display: block; font-weight: 500; font-size: 0.8rem; color: var(--ink-dim); }

/* ---- Probability bars ---- */
.probs { display: grid; gap: 8px; margin-top: 6px; }
.prob {
  display: grid; grid-template-columns: 92px 1fr 48px; align-items: center; gap: 10px;
  font-size: 0.85rem;
}
.prob .lab { color: var(--ink-dim); }
.prob .bar { height: 10px; border-radius: 6px; background: var(--bg-panel-2); overflow: hidden; }
.prob .bar > span { display: block; height: 100%; background: var(--accent); border-radius: 6px; transition: width 0.5s ease; }
.prob.top .lab { color: var(--ink); font-weight: 650; }
.prob.top .bar > span { background: var(--good); }
.prob .val { text-align: right; font-variant-numeric: tabular-nums; }

details.more { margin-top: 12px; }
details.more > summary {
  cursor: pointer; color: var(--accent); font-weight: 600; font-size: 0.9rem;
  list-style: none; padding: 6px 0;
}
details.more > summary::-webkit-details-marker { display: none; }

/* ---- Disclaimers ---- */
.notice {
  font-size: 0.82rem; line-height: 1.45;
  border-left: 3px solid var(--warn);
  background: rgba(251, 191, 36, 0.08);
  padding: 10px 12px; border-radius: 8px; color: var(--ink-dim);
  margin-bottom: 12px;
}
.notice.strong { border-left-color: var(--bad); background: rgba(248, 113, 113, 0.08); }

.site-disclaimer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 16px calc(16px + env(safe-area-inset-bottom));
  font-size: 0.75rem;
  color: var(--ink-dim);
  text-align: center;
  border-top: 1px solid var(--line);
}

/* ---- Section label ---- */
.section-label {
  text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 0.72rem; color: var(--ink-dim); font-weight: 700;
  margin: 4px 0 10px;
}

.prompt { font-size: 1.15rem; font-weight: 650; color: var(--ink); margin: 4px 0 12px; }

.fade-in { animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---- About project section (home page) ---- */
.about-wide {
  width: 100vw;
  max-width: 960px;
  margin-left: 50%;
  transform: translateX(-50%);
  box-sizing: border-box;
  padding: 0 16px;
}
.about-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}
.about-card, .about-card * { color: #000; }
.about-title {
  font-size: 1.4rem;
  font-weight: 800;
  text-decoration: underline;
  margin: 0 0 6px;
}
.about-subtitle {
  font-size: 0.95rem;
  font-weight: 500;
  margin: 0 0 18px;
}
.about-full { margin-bottom: 20px; }
.about-quiz-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.about-block { margin-bottom: 20px; }
.about-block-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 4px;
}
.about-block-subtitle {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
}
.about-block-subtitle ol, .about-block-subtitle ul {
  margin: 4px 0 0;
  padding-left: 1.2em;
}
.about-figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  align-items: start;
}
.about-figures figure, .about-full { margin: 0; }
.about-figures img, .about-full img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
  border: 1px solid var(--line);
}
.about-figures figcaption {
  font-size: 0.78rem;
  text-align: center;
  margin-top: 6px;
}

/* ---- Light theme fallback (viewer preference) ---- */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #eef1f8;
    --bg-panel: #ffffff;
    --bg-panel-2: #f2f5fc;
    --ink: #101728;
    --ink-dim: #55617e;
    --line: #d8deee;
    --accent-ink: #ffffff;
    --ecg-bg: #0a0f1e; /* keep the trace dark — reads best for ECG */
  }
  .site-disclaimer { color: var(--ink-dim); }
}