/* CardioScores styles */
:root {
  --brand: #0f4c81;
  --brand-dark: #0a3a63;
  --accent: #e8501a;
  --bg: #f4f7fa;
  --card: #ffffff;
  --text: #1c2733;
  --muted: #5b6b7b;
  --border: #dbe4ec;
  --low: #1e8e3e;
  --mod: #b8860b;
  --high: #d9640d;
  --vhigh: #c62828;
  --info: #1565c0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(16, 42, 67, 0.10), 0 4px 14px rgba(16, 42, 67, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10161d;
    --card: #1a232d;
    --text: #e8eef4;
    --muted: #93a4b5;
    --border: #2b3947;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--brand);
  color: #fff;
  padding: calc(10px + env(safe-area-inset-top)) 14px 10px;
  box-shadow: var(--shadow);
}
.top-title {
  flex: 1;
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.back-btn, .home-btn {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1.15rem;
  width: 38px;
  height: 38px;
  cursor: pointer;
  flex: none;
}
.back-btn:active, .home-btn:active { background: rgba(255, 255, 255, 0.28); }

.view {
  max-width: 860px;
  margin: 0 auto;
  padding: 16px 14px 40px;
}

/* Search */
.search-box {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  margin-bottom: 14px;
  outline: none;
}
.search-box:focus { border-color: var(--brand); }

/* Category grid */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.cat-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
}
.cat-card:active { transform: scale(0.99); }
.cat-card .cat-icon { font-size: 1.5rem; }
.cat-card h3 { margin: 6px 0 2px; font-size: 1rem; }
.cat-card p { margin: 0; color: var(--muted); font-size: 0.85rem; }
.cat-card .cat-count {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--brand);
  background: rgba(15, 76, 129, 0.10);
  border-radius: 20px;
  padding: 2px 10px;
}
@media (prefers-color-scheme: dark) {
  .cat-card .cat-count { color: #9cc6ea; background: rgba(84, 148, 201, 0.18); }
}

/* Calculator list */
.calc-list { display: flex; flex-direction: column; gap: 10px; }
.calc-item {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow);
}
.calc-item h3 { margin: 0 0 2px; font-size: 0.98rem; }
.calc-item p { margin: 0; color: var(--muted); font-size: 0.85rem; }
.calc-item .ext-tag {
  font-size: 0.7rem;
  color: var(--info);
  border: 1px solid var(--info);
  border-radius: 20px;
  padding: 1px 8px;
  margin-left: 6px;
  vertical-align: middle;
}
.section-label {
  margin: 18px 0 8px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* Calculator page */
.calc-page { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 16px; box-shadow: var(--shadow); }
.calc-page h2 { margin: 0 0 4px; font-size: 1.2rem; }
.calc-short { color: var(--muted); margin: 0 0 16px; font-size: 0.92rem; }

.input-row { margin-bottom: 14px; }
.input-row label.row-label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 5px; }
.input-row .hint { font-weight: 400; color: var(--muted); font-size: 0.8rem; display: block; }
.input-row select,
.input-row input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}
.check-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
}
.check-row input[type="checkbox"] { width: 20px; height: 20px; margin: 2px 0 0; flex: none; accent-color: var(--brand); }
.check-row .check-text { font-size: 0.92rem; }
.check-row .pts { color: var(--muted); font-size: 0.8rem; white-space: nowrap; margin-left: auto; padding-left: 8px; }
.unit-suffix { color: var(--muted); font-size: 0.85rem; margin-left: 6px; }

/* Result panel */
.result-panel {
  margin-top: 18px;
  border-radius: var(--radius);
  padding: 14px 16px;
  border: 1px solid var(--border);
  background: var(--bg);
}
.result-panel .score-line { font-size: 1.5rem; font-weight: 700; margin: 0; }
.result-panel .score-line .unit { font-size: 0.9rem; font-weight: 400; color: var(--muted); margin-left: 6px; }
.result-panel .interp { margin: 6px 0 0; font-size: 0.95rem; }
.result-panel .detail { margin: 6px 0 0; font-size: 0.85rem; color: var(--muted); white-space: pre-line; }
.result-panel.level-low   { border-left: 6px solid var(--low); }
.result-panel.level-mod   { border-left: 6px solid var(--mod); }
.result-panel.level-high  { border-left: 6px solid var(--high); }
.result-panel.level-vhigh { border-left: 6px solid var(--vhigh); }
.result-panel.level-info  { border-left: 6px solid var(--info); }
.level-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 20px;
  padding: 2px 10px;
  color: #fff;
  margin-bottom: 6px;
}
.level-badge.low { background: var(--low); }
.level-badge.mod { background: var(--mod); }
.level-badge.high { background: var(--high); }
.level-badge.vhigh { background: var(--vhigh); }
.level-badge.info { background: var(--info); }

.result-chart {
  margin-top: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 8px 4px;
}
.result-chart svg { width: 100%; height: auto; display: block; }

.notes-block, .refs-block {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--muted);
}
.refs-block ol { margin: 6px 0 0; padding-left: 20px; }
.notes-block strong { color: var(--text); }

.external-box {
  margin-top: 14px;
  padding: 14px;
  border: 1px dashed var(--info);
  border-radius: var(--radius);
  font-size: 0.9rem;
}
.external-box > p { margin-top: 0; }
.btn-open-ext {
  display: inline-block;
  width: 100%;
  background: var(--info);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 16px;
  cursor: pointer;
  margin: 4px 0 12px;
}
.btn-open-ext:active { filter: brightness(0.92); }
.ext-url-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
}
.ext-url {
  flex: 1;
  min-width: 0;
  color: var(--info);
  font-size: 0.8rem;
  word-break: break-all;
  align-self: center;
}
.btn-copy-ext {
  flex: none;
  background: none;
  border: 1px solid var(--info);
  color: var(--info);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}
.btn-copy-ext:active { background: rgba(21, 101, 192, 0.12); }

.btn-primary {
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 18px;
  cursor: pointer;
  width: 100%;
}
.btn-primary:active { background: var(--brand-dark); }
.btn-reset {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.85rem;
  cursor: pointer;
  margin-top: 14px;
}

/* Footer & modal */
.footer {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 14px calc(20px + env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 0.75rem;
}
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 20, 33, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
/* The [hidden] attribute must win over display:flex above, or the modal never closes. */
.modal-overlay[hidden] { display: none; }
.modal {
  background: var(--card);
  border-radius: var(--radius);
  max-width: 520px;
  width: 100%;
  padding: 22px;
  max-height: 85vh;
  overflow-y: auto;
}
.modal h2 { margin-top: 0; }
.modal ul { padding-left: 20px; font-size: 0.9rem; }

.empty-msg { color: var(--muted); text-align: center; padding: 30px 10px; }

@media (max-width: 480px) {
  .cat-grid { grid-template-columns: 1fr 1fr; }
  .cat-card p { display: none; }
}