/* ============================================================
   SimuladorFuncionPulmonar — estilos globales
   ============================================================ */
:root {
  color-scheme: light;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --text: #121826;
  --text-2: #4b5563;
  --muted: #6b7280;
  --border: #e3e5ea;
  --accent: #1c5cab;
  --accent-strong: #184f95;
  --accent-soft: #e8f0fb;
  --accent-ink: #ffffff;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  /* gráficos */
  --chart-surface: #fcfcfb;
  --chart-grid: #e1e0d9;
  --chart-axis: #c3c2b7;
  --chart-ink: #0b0b0b;
  --chart-muted: #898781;
  --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100;
  --s5: #e87ba4; --s6: #008300; --s7: #4a3aa7; --s8: #e34948;
  --good: #0ca30c; --warn: #fab219; --serious: #ec835a; --critical: #d03b3b;
  --good-ink: #006300;
  --sidebar-w: 268px;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1115;
  --surface: #181b21;
  --surface-2: #1f232b;
  --text: #f3f4f6;
  --text-2: #c3c2b7;
  --muted: #8f8f8a;
  --border: #2c2f36;
  --accent: #3987e5;
  --accent-strong: #5598e7;
  --accent-soft: #1b2a40;
  --accent-ink: #ffffff;
  --shadow: 0 1px 2px rgba(0,0,0,.4);
  --chart-surface: #1a1a19;
  --chart-grid: #2c2c2a;
  --chart-axis: #383835;
  --chart-ink: #ffffff;
  --chart-muted: #898781;
  --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
  --s5: #d55181; --s6: #008300; --s7: #9085e9; --s8: #e66767;
  --good-ink: #0ca30c;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}
a { color: var(--accent); }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 .75rem; }
small, .small { font-size: .85rem; color: var(--text-2); }
code { background: var(--surface-2); padding: .1em .35em; border-radius: 4px; font-size: .9em; }
.formula { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: .5rem .75rem; margin: .4rem 0; font-size: .9rem; overflow-x: auto; }

/* ---------- Layout ---------- */
.app { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }
.sidebar {
  background: var(--surface); border-right: 1px solid var(--border);
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  display: flex; flex-direction: column;
}
.brand { padding: 1rem 1rem .5rem; border-bottom: 1px solid var(--border); }
.brand .logo { display: flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.05rem; }
.brand .logo span.mark { width: 34px; height: 34px; border-radius: 9px; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: 1.1rem; }
.brand .sub { font-size: .78rem; color: var(--muted); margin-top: .3rem; }
.nav { padding: .5rem; flex: 1; }
.nav-group { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: .8rem .6rem .3rem; }
.navlink {
  display: flex; align-items: center; gap: .6rem; padding: .5rem .6rem; border-radius: 8px;
  color: var(--text); text-decoration: none; font-size: .93rem; cursor: pointer;
}
.navlink:hover { background: var(--surface-2); }
.navlink.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.navlink .ic { width: 22px; text-align: center; font-size: 1rem; }
.sidebar-foot { padding: .75rem 1rem; border-top: 1px solid var(--border); font-size: .75rem; color: var(--muted); }

.main { min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; gap: .75rem; padding: .6rem 1.25rem;
  background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 20;
}
.topbar .title { font-weight: 600; font-size: 1.05rem; flex: 1; }
.topbar .crumb { color: var(--muted); font-size: .85rem; }
.content { padding: 1.5rem 2rem 2.5rem; max-width: 1240px; width: 100%; margin: 0 auto; }

/* ---------- Componentes ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.2rem 1.35rem; margin-bottom: 1.25rem; box-shadow: var(--shadow);
}
.card > h2, .card > h3 { margin-bottom: .6rem; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: .5rem; margin-bottom: .6rem; }
.grid { display: grid; gap: 1.25rem; }
.grid.top { align-items: start; }
.grid.top > .card { margin-bottom: 0; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
input[type=number] { -moz-appearance: textfield; appearance: textfield; }
input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.span-2 { grid-column: span 2; }
.row { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.stack { display: flex; flex-direction: column; gap: .5rem; }
.mt { margin-top: .75rem; } .mb { margin-bottom: .75rem; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.right { text-align: right; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }

.btn {
  appearance: none; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: .45rem .9rem; border-radius: 8px; font-size: .9rem; cursor: pointer; font-family: inherit;
  display: inline-flex; align-items: center; gap: .4rem; line-height: 1.2;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-danger { background: var(--critical); border-color: var(--critical); color: #fff; }
.btn-sm { padding: .3rem .6rem; font-size: .82rem; }
.btn-lg { padding: .7rem 1.3rem; font-size: 1.05rem; }
.btn-ghost { border-color: transparent; background: transparent; }

.field { display: flex; flex-direction: column; gap: .25rem; margin-bottom: .6rem; }
.field label { font-size: .82rem; color: var(--text-2); font-weight: 500; }
.field .inp { display: flex; align-items: center; gap: .4rem; min-width: 0; }
.field .inp > input, .field .inp > select, .field .inp > textarea { flex: 1 1 0; min-width: 0; }
.field input[type=number], .field input[type=text], .field input[type=date], .field select, .field textarea {
  width: 100%; padding: .45rem .6rem; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font-family: inherit; font-size: .92rem;
}
.field textarea { min-height: 80px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.field .unit { font-size: .8rem; color: var(--muted); white-space: nowrap; min-width: 2.5rem; }
.field .help { font-size: .75rem; color: var(--muted); }
.field.inline { flex-direction: row; align-items: center; gap: .6rem; }
.field.inline label { min-width: 120px; }
.field input[type=range] { width: 100%; accent-color: var(--accent); }
.slider-row { display: grid; grid-template-columns: 1fr auto; gap: .5rem; align-items: center; }
.slider-row .val { font-variant-numeric: tabular-nums; font-size: .88rem; min-width: 4.5rem; text-align: right; color: var(--text); }
.fields-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: .4rem .8rem; }
.check { display: flex; align-items: center; gap: .5rem; font-size: .9rem; cursor: pointer; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }

.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--border); margin-bottom: 1rem; flex-wrap: wrap; }
.tab { padding: .5rem .9rem; cursor: pointer; border-bottom: 2px solid transparent; color: var(--text-2); font-size: .92rem; margin-bottom: -1px; border-radius: 6px 6px 0 0; }
.tab:hover { color: var(--text); background: var(--surface-2); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

.badge { display: inline-flex; align-items: center; gap: .3rem; padding: .15rem .55rem; border-radius: 999px; font-size: .76rem; font-weight: 600; border: 1px solid transparent; }
.badge-neutral { background: var(--surface-2); color: var(--text-2); border-color: var(--border); }
.badge-good { background: rgba(12,163,12,.12); color: var(--good-ink); }
.badge-warn { background: rgba(250,178,25,.18); color: #7a5200; }
.badge-serious { background: rgba(236,131,90,.18); color: #8a3a16; }
.badge-critical { background: rgba(208,59,59,.14); color: #a12626; }
.badge-accent { background: var(--accent-soft); color: var(--accent); }
:root[data-theme="dark"] .badge-warn { color: #fab219; }
:root[data-theme="dark"] .badge-serious { color: #ec835a; }
:root[data-theme="dark"] .badge-critical { color: #ff8a8a; }

.alert { padding: .7rem .9rem; border-radius: 10px; border: 1px solid var(--border); background: var(--surface-2); margin: .6rem 0; font-size: .9rem; }
.alert-info { border-left: 4px solid var(--accent); }
.alert-ok { border-left: 4px solid var(--good); }
.alert-warn { border-left: 4px solid var(--warn); }
.alert-danger { border-left: 4px solid var(--critical); }

.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th, .table td { padding: .45rem .55rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.table th { font-weight: 600; color: var(--text-2); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
.table td.num, .table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }
.table.compact th, .table.compact td { padding: .3rem .45rem; font-size: .85rem; }

.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .6rem; }
.stat { background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: .6rem .75rem; }
.stat .lbl { font-size: .74rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stat .val { font-size: 1.35rem; font-weight: 600; margin-top: .1rem; }
.stat .val small { font-size: .78rem; font-weight: 400; color: var(--muted); margin-left: .2rem; }
.stat .sub { font-size: .78rem; color: var(--text-2); }
.stat.good { border-color: var(--good); } .stat.warn { border-color: var(--warn); } .stat.critical { border-color: var(--critical); }

.chart-wrap { position: relative; width: 100%; background: var(--chart-surface); border: 1px solid var(--border); border-radius: 10px; padding: .5rem; }
.chart-wrap canvas { display: block; width: 100%; }
.chart-title { font-size: .85rem; font-weight: 600; color: var(--text-2); margin-bottom: .25rem; }
.chart-tip { position: absolute; pointer-events: none; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: .35rem .55rem; font-size: .78rem; box-shadow: var(--shadow); display: none; z-index: 5; white-space: nowrap; font-variant-numeric: tabular-nums; }
.legend { display: flex; gap: .9rem; flex-wrap: wrap; font-size: .8rem; color: var(--text-2); margin: .3rem 0 .4rem; }
.legend .sw { display: inline-block; width: 14px; height: 3px; border-radius: 2px; vertical-align: middle; margin-right: .35rem; }

.kv { display: grid; grid-template-columns: auto 1fr; gap: .25rem .9rem; font-size: .9rem; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; font-variant-numeric: tabular-nums; }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps li { position: relative; padding-left: 2.2rem; margin-bottom: .6rem; }
.steps li::before { counter-increment: s; content: counter(s); position: absolute; left: 0; top: 0; width: 1.6rem; height: 1.6rem; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .8rem; display: grid; place-items: center; }

.ruta li { padding: .55rem 0 .55rem 2.4rem; margin: 0; border-bottom: 1px solid var(--border); }
.ruta li:last-child { border-bottom: none; }
.ruta li::before { top: .6rem; }
.ruta li.done::before { content: '✓'; background: rgba(12,163,12,.14); color: var(--good-ink); }
.ruta-head { display: flex; align-items: center; gap: .5rem; }
.ruta-toggle { flex: 1; min-width: 0; text-align: left; background: none; border: 0; padding: .1rem 0; font: inherit; font-weight: 600; color: var(--text); cursor: pointer; display: flex; align-items: center; gap: .45rem; }
.ruta-toggle:hover { color: var(--accent); }
.ruta-toggle .chev { color: var(--muted); font-size: .75rem; transition: transform .15s; }
.ruta-toggle[aria-expanded="true"] .chev { transform: rotate(90deg); }
.ruta li.done .ruta-toggle .t { color: var(--text-2); }
.ruta-body { padding: .35rem 0 .2rem; }
.ruta-body p:last-child { margin-bottom: 0; }
.stats-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.empty { text-align: center; padding: 1.2rem .8rem; color: var(--text-2); background: var(--surface-2); border: 1px dashed var(--border); border-radius: 10px; margin-top: .9rem; font-size: .9rem; }

.pill-row { display: flex; gap: .4rem; flex-wrap: wrap; }
.pill { padding: .3rem .7rem; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); cursor: pointer; font-size: .82rem; }
.pill:hover { background: var(--surface-2); }
.pill.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.option { display: block; padding: .55rem .8rem; border: 1px solid var(--border); border-radius: 10px; margin-bottom: .4rem; cursor: pointer; background: var(--surface); }
.option:hover { background: var(--surface-2); }
.option.selected { border-color: var(--accent); background: var(--accent-soft); }
.option.correct { border-color: var(--good); background: rgba(12,163,12,.10); }
.option.wrong { border-color: var(--critical); background: rgba(208,59,59,.10); }

.hero { background: linear-gradient(135deg, var(--accent) 0%, #2f7fd0 60%, #2aa198 100%); color: #fff; border-radius: 16px; padding: 1.75rem 2rem; margin-bottom: 1.5rem; }
.hero h1 { color: #fff; margin-bottom: .3rem; }
.hero p { color: rgba(255,255,255,.9); max-width: 70ch; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1rem; margin-bottom: .5rem; }
.section-title { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 1.75rem 0 .7rem; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: .9rem 1rem; cursor: pointer; transition: transform .1s; }
.tile:hover { transform: translateY(-2px); border-color: var(--accent); }
.tile .ic { font-size: 1.5rem; }
.tile h3 { margin: .3rem 0 .2rem; font-size: 1rem; }
.tile p { font-size: .82rem; color: var(--text-2); margin: 0; }

.timer { font-size: 3.2rem; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: .02em; text-align: center; }
.timer.running { color: var(--accent); }
.bigmsg { text-align: center; font-size: 1.1rem; padding: .6rem; background: var(--accent-soft); border-radius: 10px; color: var(--accent); font-weight: 600; min-height: 2.6rem; }

.toast { position: fixed; bottom: 1.2rem; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: .6rem 1rem; border-radius: 10px; font-size: .9rem; z-index: 100; opacity: 0; transition: opacity .2s; pointer-events: none; }
.toast.show { opacity: 1; }
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 90; display: grid; place-items: center; padding: 1rem; }
.modal { background: var(--surface); border-radius: 14px; max-width: 720px; width: 100%; max-height: 90vh; overflow: auto; padding: 1.2rem; }

.progress { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; border: 1px solid var(--border); }
.progress > div { height: 100%; background: var(--accent); }

.lungbars { display: flex; gap: 2px; align-items: flex-end; height: 240px; }
.diagram svg { width: 100%; height: auto; }

.print-only { display: none; }

/* ---------- Responsive ---------- */
@media (min-width: 821px) {
  .app.nav-collapsed { grid-template-columns: 1fr; }
  .app.nav-collapsed .sidebar { display: none; }
}
@media (max-width: 1000px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: 0; top: 0; width: var(--sidebar-w); transform: translateX(-100%); transition: transform .2s; z-index: 50; }
  .sidebar.open { transform: translateX(0); box-shadow: 0 0 0 100vw rgba(0,0,0,.35); }
  .topbar .btn-label { display: none; }
  .topbar .title { font-size: .95rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .span-2 { grid-column: span 1; }
  .content { padding: 1rem; }
  .hero { padding: 1.25rem; }
  .ruta-head .check span { display: none; }
  .field.inline { flex-direction: column; align-items: stretch; }
  .timer { font-size: 2.4rem; }
}

@media print {
  .sidebar, .topbar, .no-print { display: none !important; }
  .app { display: block; }
  .content { max-width: none; padding: 0; }
  .card { box-shadow: none; break-inside: avoid; }
  .print-only { display: block; }
  body { background: #fff; color: #000; }
}