:root {
  --mk-ink: #24312e;
  --mk-muted: #65706b;
  --mk-paper: #fffdf8;
  --mk-wash: #f5f0e7;
  --mk-line: #ded6c8;
  --mk-green: #255b4b;
  --mk-green-soft: #e7f0eb;
  --mk-rust: #964b2d;
  --mk-rust-soft: #f7e8df;
  --mk-gold: #946d23;
  --mk-gold-soft: #f6edcf;
  --mk-blue: #245c82;
  --mk-blue-soft: #e7f1f8;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.mk-page {
  margin: 0;
  color: var(--mk-ink);
  background:
    radial-gradient(circle at 10% -4%, rgba(148, 109, 35, 0.11), transparent 28rem),
    var(--mk-wash);
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans TC", "PingFang TC", sans-serif;
}

.mk-page .site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 253, 248, 0.94);
  border-bottom: 1px solid var(--mk-line);
  backdrop-filter: blur(12px);
}

.mk-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.72rem;
  border: 1px solid var(--mk-line);
  border-radius: 999px;
  color: var(--mk-green);
  background: var(--mk-paper);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
}

.mk-app {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 calc(5rem + env(safe-area-inset-bottom));
}

.mk-hero {
  padding: clamp(1.4rem, 4vw, 2.6rem);
  border: 1px solid var(--mk-line);
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255,255,255,0.98), rgba(250,245,234,0.96));
  box-shadow: 0 16px 40px rgba(64, 49, 28, 0.08);
}

.mk-eyebrow {
  margin: 0 0 0.55rem;
  color: var(--mk-rust);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.mk-hero h1 {
  margin: 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.mk-intro {
  max-width: 52rem;
  margin: 1rem 0 0;
  color: #46514d;
  font-size: 1.02rem;
  line-height: 1.8;
}

.mk-summary {
  margin: 1.2rem 0 0;
  color: var(--mk-muted);
  font-size: 0.92rem;
}

.mk-stats {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.mk-stat {
  min-width: 0;
  padding: 0.85rem 0.7rem;
  border: 1px solid var(--mk-line);
  border-radius: 14px;
  background: rgba(255,255,255,0.74);
  text-align: center;
}

.mk-stat strong,
.mk-stat span { display: block; }

.mk-stat strong {
  color: var(--mk-green);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.45rem;
}

.mk-stat span {
  margin-top: 0.25rem;
  color: var(--mk-muted);
  font-size: 0.72rem;
  line-height: 1.25;
}

.mk-section-tabs {
  display: flex;
  gap: 0.55rem;
  margin: 1.15rem 0 0;
  padding: 0.35rem 0 0.65rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.mk-section-tabs button,
.mk-controls button,
.mk-error button {
  min-height: 44px;
  border: 1px solid var(--mk-line);
  border-radius: 999px;
  padding: 0.6rem 0.95rem;
  color: var(--mk-ink);
  background: var(--mk-paper);
  font: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.mk-section-tabs button[aria-pressed="true"] {
  color: white;
  border-color: var(--mk-green);
  background: var(--mk-green);
}

.mk-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0.35rem 0 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--mk-line);
  border-radius: 16px;
  background: rgba(255, 253, 248, 0.84);
}

.mk-controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--mk-muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.mk-controls select {
  min-height: 44px;
  border: 1px solid var(--mk-line);
  border-radius: 10px;
  padding: 0 2.1rem 0 0.75rem;
  color: var(--mk-ink);
  background: white;
  font: inherit;
}

.mk-check {
  min-height: 44px;
  padding: 0 0.4rem;
}

.mk-check input {
  width: 1.15rem;
  height: 1.15rem;
  accent-color: var(--mk-green);
}

#mk-clear { margin-left: auto; }

.mk-domain-jump-shell {
  position: sticky;
  top: 72px;
  z-index: 10;
  margin: 0 0 1rem;
  padding: 0.45rem;
  border: 1px solid var(--mk-line);
  border-radius: 14px;
  background: rgba(245, 240, 231, 0.94);
  backdrop-filter: blur(10px);
}

.mk-domain-jump {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
}

.mk-domain-jump a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 0.75rem;
  border-radius: 10px;
  color: var(--mk-green);
  background: var(--mk-paper);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 800;
  white-space: nowrap;
}

.mk-results { margin-top: 1.25rem; }

.mk-results-head,
.mk-domain-head,
.mk-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.mk-results-head h2,
.mk-domain-head h2,
.mk-section-head h3 { margin: 0; }

.mk-results-head > span,
.mk-domain-head > span,
.mk-section-head > span {
  color: var(--mk-muted);
  font-size: 0.8rem;
  white-space: nowrap;
}

.mk-domains { margin-top: 0.8rem; }

.mk-domain {
  scroll-margin-top: 145px;
  margin: 0 0 1.25rem;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--mk-line);
  border-radius: 20px;
  background: rgba(255,253,248,0.9);
  box-shadow: 0 10px 26px rgba(64,49,28,0.05);
}

.mk-domain-head {
  padding-bottom: 0.9rem;
  border-bottom: 2px solid var(--mk-green);
}

.mk-domain-head h2 {
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: clamp(1.45rem, 4vw, 2rem);
}

.mk-section-block { margin-top: 1.2rem; }

.mk-section-head { margin-bottom: 0.6rem; }

.mk-section-head h3 {
  color: var(--mk-rust);
  font-size: 1rem;
  letter-spacing: 0.025em;
}

.mk-card-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.mk-card {
  min-width: 0;
  padding: 1rem;
  border: 1px solid #e6ded0;
  border-radius: 15px;
  background: white;
  transition: border-color 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.mk-card.is-focused {
  border-color: #cba849;
  background: linear-gradient(180deg, #fffdf7, #fffaf0);
  box-shadow: inset 4px 0 0 #c69a2d;
}

.mk-card-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.65rem;
}

.mk-card h4 {
  margin: 0.55rem 0 0;
  font-size: 1.03rem;
  line-height: 1.5;
}

.mk-badges,
.mk-evidence-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.mk-badges { flex: 1; }

.mk-focus-toggle {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  margin: -0.45rem -0.4rem -0.2rem 0;
  border: 1px solid var(--mk-line);
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  color: #6d5a2c;
  background: #fffdf8;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 800;
  white-space: nowrap;
  cursor: pointer;
}

.mk-focus-toggle[aria-pressed="true"] {
  color: #5b4311;
  border-color: #d1b45f;
  background: var(--mk-gold-soft);
}

.mk-focus-toggle:focus-visible {
  outline: 3px solid rgba(37, 91, 75, 0.28);
  outline-offset: 2px;
}

.mk-badge,
.mk-evidence {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  font-size: 0.68rem;
  font-weight: 800;
}

.mk-badge.section { color: var(--mk-green); background: var(--mk-green-soft); }
.mk-badge.repeat { color: var(--mk-rust); background: var(--mk-rust-soft); }
.mk-badge.legacy { color: var(--mk-gold); background: var(--mk-gold-soft); }
.mk-badge.packet { color: #5f3f78; background: #f1e9f7; }
.mk-badge.guideline { color: var(--mk-blue); background: var(--mk-blue-soft); }
.mk-badge.guideline.achd { color: #2f5e70; background: #e4f1f4; }
.mk-badge.guideline.pediatric_shunt { color: #7a4566; background: #f5e8f0; }
.mk-badge.guideline-only { color: #5d6070; background: #eef0f4; }

.mk-recall,
.mk-conclusion,
.mk-trap,
.mk-version-note { line-height: 1.7; }

.mk-recall {
  margin: 0.75rem 0 0;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  color: #47524e;
  background: #f5f7f5;
  font-size: 0.86rem;
}

.mk-conclusion {
  margin: 0.75rem 0 0;
  font-size: 0.94rem;
  font-weight: 650;
}

.mk-trap {
  margin: 0.65rem 0 0;
  color: #704431;
  font-size: 0.86rem;
}

.mk-version-note {
  margin: 0.65rem 0 0;
  padding: 0.65rem 0.75rem;
  border-left: 3px solid var(--mk-gold);
  color: #72591e;
  background: var(--mk-gold-soft);
  font-size: 0.83rem;
}

.mk-evidence-row {
  margin-top: 0.8rem;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--mk-line);
}

.mk-evidence-label {
  color: var(--mk-muted);
  font-size: 0.72rem;
  font-weight: 800;
}

.mk-evidence.formal { color: #184b3c; background: var(--mk-green-soft); }
.mk-evidence.legacy { color: #715519; background: var(--mk-gold-soft); }
.mk-evidence.packet { color: #5f3f78; background: #f1e9f7; }
.mk-evidence.guideline-source { color: var(--mk-blue); background: var(--mk-blue-soft); }
.mk-evidence.oral {
  color: #184b3c;
  background: var(--mk-green-soft);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.oral-mk-page .mk-source-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.omk-answer strong { color: var(--mk-green); }

.omk-details {
  margin-top: 0.8rem;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--mk-line);
}

.omk-details summary {
  min-height: 44px;
  display: flex;
  align-items: center;
  color: var(--mk-green);
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.omk-detail-list {
  margin: 0.3rem 0 0.7rem;
  padding-left: 1.25rem;
  color: #46514d;
  font-size: 0.84rem;
  line-height: 1.7;
}

.omk-detail-list li + li { margin-top: 0.3rem; }

.mk-source-link {
  margin-left: auto;
  color: var(--mk-green);
  font-size: 0.75rem;
  font-weight: 800;
  text-decoration: none;
}

.mk-source-link:hover { text-decoration: underline; }

.mk-method,
.mk-error,
.mk-empty {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--mk-line);
  border-radius: 14px;
  color: var(--mk-muted);
  background: rgba(255,253,248,0.82);
  font-size: 0.85rem;
  line-height: 1.7;
}

.mk-focus-storage-note {
  margin: -0.45rem 0 1rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid #e3b6af;
  border-radius: 12px;
  color: #802c24;
  background: #fff5f3;
  font-size: 0.82rem;
  line-height: 1.55;
}

.mk-method strong { color: var(--mk-ink); }
.mk-error { color: #802c24; border-color: #e3b6af; background: #fff5f3; }

@media (max-width: 820px) {
  .mk-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .mk-card-list { grid-template-columns: 1fr; }
  .mk-domain-jump-shell { top: 92px; }
}

@media (max-width: 560px) {
  .mk-app {
    width: min(100% - 1rem, 1120px);
    padding-top: 0.75rem;
  }

  .mk-page .site-header {
    padding-left: max(0.55rem, env(safe-area-inset-left));
    padding-right: max(0.55rem, env(safe-area-inset-right));
  }

  .mk-page .toolbar { gap: 0.35rem; }
  .mk-home-link { padding: 0 0.55rem; font-size: 0.75rem; }
  .mk-hero { border-radius: 18px; }
  .mk-stats { gap: 0.45rem; }
  .mk-stat { padding: 0.65rem 0.35rem; }
  .mk-stat strong { font-size: 1.2rem; }
  .mk-controls { align-items: stretch; flex-wrap: wrap; }
  .mk-controls label:has(select) { width: 100%; justify-content: space-between; }
  .mk-controls select { flex: 1; }
  #mk-clear { margin-left: auto; }
  .mk-domain-jump-shell { top: 105px; margin-left: -0.15rem; margin-right: -0.15rem; }
  .mk-domain { padding: 0.9rem; border-radius: 16px; scroll-margin-top: 170px; }
  .mk-card { padding: 0.9rem; }
  .mk-focus-toggle { margin-right: -0.3rem; }
  .mk-source-link { width: 100%; margin-left: 0; margin-top: 0.3rem; }
  .oral-mk-page .mk-controls label:has(select) { width: 100%; }
}

@media print {
  .no-print,
  .mk-section-tabs,
  .mk-controls,
  .mk-focus-toggle,
  .mk-focus-storage-note,
  .mk-domain-jump-shell { display: none !important; }
  body.mk-page { background: white; }
  .mk-app { width: 100%; padding: 0; }
  .mk-hero,
  .mk-domain,
  .mk-card { box-shadow: none; break-inside: avoid; }
  .mk-card-list { grid-template-columns: 1fr 1fr; }
}