/* ============================================================
   POCUS na Emergência — Design System
   ============================================================ */
:root {
  /* Plataforma médica educacional clara, limpa e premium */
  --c-bg: #f6f9fc;            /* cinza muito claro */
  --c-bg-soft: #eef3f8;
  --c-surface: #ffffff;        /* cards brancos */
  --c-surface-2: #f4f8fb;
  --c-border: #e6edf3;         /* bordas suaves */
  --c-border-strong: #d4dee7;
  --c-text: #1f3147;           /* corpo de texto azul-acinzentado escuro, ótima leitura */
  --c-text-soft: #51637a;
  --c-text-mute: #8295a8;
  --c-heading: #0f2d52;        /* títulos em azul escuro */

  --c-primary: #1d6fb8;        /* azul médico */
  --c-primary-d: #154f86;
  --c-primary-l: #e7f1fb;
  --c-accent: #0fb5c4;         /* ciano */
  --c-accent-d: #0a8c98;
  --c-green: #15a36b;          /* verde médico */
  --c-green-l: #e4f6ee;
  --c-danger: #d6433b;
  --c-danger-l: #fcebea;
  --c-warn: #c77a0a;
  --c-warn-l: #fdf3e2;
  --c-ok: #15a36b;
  --c-ok-l: #e4f6ee;
  --c-info: #1d6fb8;
  --c-info-l: #e7f1fb;
  --c-purple: #6d5cd6;
  --c-purple-l: #eeebfb;

  --shadow-sm: 0 1px 2px rgba(15,45,82,.05), 0 1px 3px rgba(15,45,82,.03);
  --shadow-md: 0 6px 18px rgba(15,45,82,.07), 0 2px 6px rgba(15,45,82,.04);
  --shadow-lg: 0 20px 50px rgba(15,45,82,.12);
  --radius: 16px;
  --radius-sm: 10px;
  --topbar-h: 64px;
  --sidebar-w: 288px;
  --font: 'Inter', system-ui, sans-serif;
  --font-head: 'Lexend', var(--font);
}

html[data-theme="dark"] {
  /* Modo escuro opcional — slate azulado sóbrio, sem estética "hacker" */
  --c-bg: #131c27;
  --c-bg-soft: #18222f;
  --c-surface: #1c2735;
  --c-surface-2: #233040;
  --c-border: #2e3d4f;
  --c-border-strong: #3c4f64;
  --c-text: #e8eef5;
  --c-text-soft: #b6c3d2;
  --c-text-mute: #8597aa;
  --c-heading: #eaf1f9;

  --c-primary: #4f9fe0;
  --c-primary-d: #75b5ea;
  --c-primary-l: #1d3147;
  --c-accent: #2bc4d2;
  --c-accent-d: #4fd3df;
  --c-green: #3fc187;
  --c-green-l: #15321f;
  --c-danger: #ef6b63;
  --c-danger-l: #3a1f1d;
  --c-warn: #e2a23c;
  --c-warn-l: #382b14;
  --c-ok: #3fc187;
  --c-ok-l: #15321f;
  --c-info: #4f9fe0;
  --c-info-l: #1d3147;
  --c-purple: #9a8af0;
  --c-purple-l: #241f3c;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.35);
  --shadow-md: 0 6px 18px rgba(0,0,0,.4);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  transition: background .3s, color .3s;
}
h1,h2,h3,h4 { font-family: var(--font-head); line-height: 1.24; color: var(--c-heading); margin: 0 0 .5em; letter-spacing: -.01em; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: var(--c-primary-l); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 60;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 16px;
  background: color-mix(in srgb, var(--c-surface) 88%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.brand { display: flex; align-items: center; gap: 11px; color: var(--c-text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff; font-size: 18px; box-shadow: var(--shadow-sm);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text strong { font-family: var(--font-head); font-size: 18px; letter-spacing: .3px; }
.brand-text small { font-size: 11px; color: var(--c-text-mute); letter-spacing: 1.5px; text-transform: uppercase; }

.topbar-search { position: relative; flex: 1; max-width: 520px; margin: 0 auto; }
.topbar-search > i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--c-text-mute); }
.topbar-search input {
  width: 100%; height: 42px; border-radius: 999px; border: 1px solid var(--c-border);
  background: var(--c-surface-2); color: var(--c-text); padding: 0 18px 0 40px; font-size: 14px; font-family: var(--font);
  transition: border .2s, box-shadow .2s;
}
.topbar-search input:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 4px var(--c-primary-l); }
.search-results {
  position: absolute; top: 50px; left: 0; right: 0; max-height: 60vh; overflow: auto;
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: 14px; box-shadow: var(--shadow-lg);
  padding: 6px; z-index: 70;
}
.search-results a { display: flex; flex-direction: column; padding: 9px 12px; border-radius: 9px; color: var(--c-text); }
.search-results a:hover, .search-results a.active { background: var(--c-primary-l); text-decoration: none; }
.search-results .sr-title { font-weight: 600; font-size: 14px; }
.search-results .sr-sub { font-size: 12px; color: var(--c-text-mute); }
.search-results .sr-empty { padding: 14px; color: var(--c-text-mute); text-align: center; }

.topbar-actions { display: flex; gap: 6px; }
.icon-btn {
  width: 42px; height: 42px; border-radius: 11px; border: 1px solid transparent;
  background: transparent; color: var(--c-text-soft); cursor: pointer; font-size: 16px;
  display: grid; place-items: center; transition: background .2s, color .2s;
}
.icon-btn:hover { background: var(--c-surface-2); color: var(--c-primary); }
#searchToggle { display: none; }

/* ---------- Layout ---------- */
.layout { display: flex; min-height: calc(100vh - var(--topbar-h)); }
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0; position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h)); overflow-y: auto;
  background: var(--c-surface); border-right: 1px solid var(--c-border);
  display: flex; flex-direction: column; padding: 14px 12px;
}
.nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav .nav-group-label {
  font-size: 11px; letter-spacing: 1.3px; text-transform: uppercase; color: var(--c-text-mute);
  padding: 14px 14px 6px; font-weight: 700;
}
.nav a {
  display: flex; align-items: center; gap: 12px; padding: 10px 13px; border-radius: 11px;
  color: var(--c-text-soft); font-size: 14px; font-weight: 500; position: relative;
  transition: background .18s, color .18s;
}
.nav a:hover { background: var(--c-surface-2); color: var(--c-text); text-decoration: none; }
.nav a.active { background: var(--c-primary-l); color: var(--c-primary-d); font-weight: 600; }
html[data-theme="dark"] .nav a.active { color: var(--c-primary); }
.nav a .ni { width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 13px;
  background: var(--c-surface-2); color: var(--c-text-mute); flex-shrink: 0; }
.nav a.active .ni { background: var(--c-primary); color: #fff; }
.nav a.featured { background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); color: #fff; box-shadow: var(--shadow-sm); }
.nav a.featured .ni { background: rgba(255,255,255,.2); color: #fff; }
.nav a.featured:hover { color: #fff; filter: brightness(1.05); }
.nav-num { margin-left: auto; font-size: 11px; color: var(--c-text-mute); font-variant-numeric: tabular-nums; }
.nav a.active .nav-num { color: var(--c-primary-d); }

.sidebar-foot { padding: 12px 10px 4px; }
.disclaimer-mini { font-size: 11.5px; color: var(--c-text-mute); line-height: 1.45; margin: 0; }
.disclaimer-mini i { color: var(--c-warn); }

.scrim { display: none; }

/* ---------- Content ---------- */
.content { flex: 1; min-width: 0; padding: 30px clamp(16px, 4vw, 52px) 80px; }
.module { max-width: 1000px; margin: 0 auto; animation: fade .35s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.loading { display: flex; align-items: center; gap: 10px; color: var(--c-text-mute); padding: 40px; }
.spinner { width: 18px; height: 18px; border: 2px solid var(--c-border); border-top-color: var(--c-primary); border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Breadcrumb + module head */
.crumb { font-size: 12.5px; color: var(--c-text-mute); margin-bottom: 8px; letter-spacing: .3px; }
.module-head { margin-bottom: 26px; }
.module-head h1 { font-size: clamp(26px, 4vw, 38px); }
.module-head .lead { font-size: 16.5px; color: var(--c-text-soft); max-width: 75ch; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: var(--c-primary);
  background: var(--c-primary-l); padding: 5px 12px; border-radius: 999px; margin-bottom: 12px;
}

/* ---------- Cards & sections ---------- */
.section { margin: 30px 0; }
.section > h2 { font-size: 23px; display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.section > h2 .sec-ic { color: var(--c-primary); }
.card {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow-sm);
}
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
@media (max-width: 880px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.feature-card {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm); transition: transform .2s, box-shadow .2s, border-color .2s;
  display: flex; flex-direction: column; gap: 8px; cursor: pointer; text-align: left;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-border-strong); text-decoration: none; }
.feature-card .fc-ic { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; font-size: 20px; color: #fff; }
.feature-card h3 { font-size: 17px; margin: 4px 0 0; }
.feature-card p { font-size: 14px; color: var(--c-text-soft); margin: 0; }
.feature-card .fc-go { margin-top: auto; font-size: 13px; font-weight: 600; color: var(--c-primary); }

/* Tinted boxes */
.box { border-radius: var(--radius-sm); padding: 14px 16px; margin: 14px 0; border: 1px solid; font-size: 14.5px; }
.box .box-title { font-weight: 700; display: flex; align-items: center; gap: 8px; margin-bottom: 5px; }
.box p:last-child, .box ul:last-child { margin-bottom: 0; }
.box.tip { background: var(--c-info-l); border-color: color-mix(in srgb, var(--c-info) 30%, transparent); }
.box.tip .box-title { color: var(--c-info); }
.box.warn { background: var(--c-warn-l); border-color: color-mix(in srgb, var(--c-warn) 35%, transparent); }
.box.warn .box-title { color: var(--c-warn); }
.box.danger { background: var(--c-danger-l); border-color: color-mix(in srgb, var(--c-danger) 35%, transparent); }
.box.danger .box-title { color: var(--c-danger); }
.box.ok { background: var(--c-ok-l); border-color: color-mix(in srgb, var(--c-ok) 32%, transparent); }
.box.ok .box-title { color: var(--c-ok); }
.box.pearl { background: var(--c-purple-l); border-color: color-mix(in srgb, var(--c-purple) 32%, transparent); }
.box.pearl .box-title { color: var(--c-purple); }

/* Info blocks (objective / when / probe…) */
.infoblocks { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 14px; }
.iblock { background: var(--c-surface-2); border: 1px solid var(--c-border); border-radius: var(--radius-sm); padding: 14px 16px; }
.iblock .ib-h { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 14px; margin-bottom: 7px; color: var(--c-text); }
.iblock .ib-h i { color: var(--c-primary); }
.iblock p, .iblock ul { margin: 0; font-size: 14px; color: var(--c-text-soft); }

/* Steps */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.steps li { position: relative; padding: 12px 14px 12px 52px; background: var(--c-surface-2); border-radius: var(--radius-sm); border: 1px solid var(--c-border); font-size: 14.5px; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 12px; top: 11px; width: 28px; height: 28px; border-radius: 50%;
  background: var(--c-primary); color: #fff; font-weight: 700; font-size: 14px; display: grid; place-items: center;
}

/* Lists */
.feat-list { list-style: none; padding: 0; margin: 0; }
.feat-list li { position: relative; padding: 6px 0 6px 26px; font-size: 14.5px; }
.feat-list li::before { content: "\f00c"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; left: 0; top: 7px; color: var(--c-primary); font-size: 12px; }
.feat-list.x li::before { content: "\f00d"; color: var(--c-danger); }
.feat-list.dot li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--c-primary); top: 13px; left: 5px; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius-sm); }
table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 460px; }
thead th { background: var(--c-surface-2); text-align: left; padding: 11px 14px; font-weight: 700; color: var(--c-text); border-bottom: 1px solid var(--c-border); white-space: nowrap; }
tbody td { padding: 10px 14px; border-bottom: 1px solid var(--c-border); color: var(--c-text-soft); vertical-align: top; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--c-surface-2); }
td .pill { font-size: 12px; }

/* Pills / chips / badges */
.pill { display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600; }
.pill.p { background: var(--c-primary-l); color: var(--c-primary-d); }
.pill.r { background: var(--c-danger-l); color: var(--c-danger); }
.pill.g { background: var(--c-ok-l); color: var(--c-ok); }
.pill.w { background: var(--c-warn-l); color: var(--c-warn); }
.pill.b { background: var(--c-info-l); color: var(--c-info); }
html[data-theme="dark"] .pill.p { color: var(--c-primary); }

/* Figure / illustration */
.figure { margin: 16px 0; text-align: center; }
.figure img { max-width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--c-border); box-shadow: var(--shadow-sm); background: #fff; }
.figure figcaption { font-size: 12.5px; color: var(--c-text-mute); margin-top: 8px; }
.figure .schema-note { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--c-warn); margin-top: 6px; font-weight: 600; }

/* Schema cards (image bank) */
.schema-card { position: relative; }
.schema-card .schema-tag { position: absolute; top: 12px; right: 12px; z-index: 2; }
.schema-card figcaption { text-align: left; }

/* ---------- Real media (embeds / images) ---------- */
.media-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 18px; }
.media-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); overflow: hidden; margin: 0; display: flex; flex-direction: column; }
.media-frame { position: relative; width: 100%; aspect-ratio: 16/9; background: #0c1622; }
.media-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.media-img { width: 100%; display: block; background: var(--c-surface-2); }
.media-cap { padding: 13px 16px 6px; font-size: 14px; color: var(--c-text-soft); }
.media-cap b { color: var(--c-heading); }
.media-credit { padding: 0 16px 14px; font-size: 11.5px; color: var(--c-text-mute); line-height: 1.5;
  display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: center; }
.media-credit i { color: var(--c-primary); }
.media-credit a { font-weight: 600; white-space: nowrap; }
/* link-card variant (legal fallback) */
.media-card.media-link { flex-direction: row; gap: 14px; align-items: center; padding: 16px; text-decoration: none; transition: transform .2s, box-shadow .2s, border-color .2s; }
.media-card.media-link:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-border-strong); text-decoration: none; }
.media-card.media-link .ml-ic { width: 44px; height: 44px; flex-shrink: 0; border-radius: 12px; display: grid; place-items: center;
  background: var(--c-primary-l); color: var(--c-primary-d); font-size: 18px; }
.media-card.media-link b { color: var(--c-heading); }
.media-card.media-link p { margin: 2px 0 4px; font-size: 13px; color: var(--c-text-soft); }
.media-credit-inline { font-size: 11px; color: var(--c-text-mute); }

/* ---------- Accordion ---------- */
.accordion { border: 1px solid var(--c-border); border-radius: var(--radius-sm); overflow: hidden; }
.acc-item + .acc-item { border-top: 1px solid var(--c-border); }
.acc-head { width: 100%; text-align: left; padding: 14px 16px; background: var(--c-surface); border: none; cursor: pointer;
  font-weight: 600; font-size: 15px; color: var(--c-text); display: flex; align-items: center; gap: 10px; font-family: var(--font); }
.acc-head:hover { background: var(--c-surface-2); }
.acc-head .chev { margin-left: auto; transition: transform .25s; color: var(--c-text-mute); }
.acc-item.open .chev { transform: rotate(180deg); }
.acc-body { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.acc-body-inner { padding: 0 16px 16px; font-size: 14.5px; color: var(--c-text-soft); }

/* ---------- Quiz ---------- */
.quiz { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 20px; }
.quiz .q-prog { font-size: 12.5px; color: var(--c-text-mute); margin-bottom: 6px; }
.quiz .q-text { font-weight: 600; font-size: 16px; margin-bottom: 14px; }
.quiz .q-opts { display: flex; flex-direction: column; gap: 9px; }
.q-opt { text-align: left; padding: 12px 15px; border-radius: var(--radius-sm); border: 1.5px solid var(--c-border);
  background: var(--c-surface-2); cursor: pointer; font-size: 14.5px; color: var(--c-text); transition: all .15s; font-family: var(--font); }
.q-opt:hover { border-color: var(--c-primary); }
.q-opt.correct { border-color: var(--c-ok); background: var(--c-ok-l); color: var(--c-ok); font-weight: 600; }
.q-opt.wrong { border-color: var(--c-danger); background: var(--c-danger-l); color: var(--c-danger); }
.q-opt:disabled { cursor: default; }
.q-explain { margin-top: 14px; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--c-info-l); font-size: 14px; border: 1px solid color-mix(in srgb, var(--c-info) 25%, transparent); }
.q-explain.hidden { display: none; }
.quiz-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; gap: 10px; }
.quiz-score { font-size: 22px; font-weight: 800; font-family: var(--font-head); }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 11px; border: 1px solid transparent;
  font-weight: 600; font-size: 14px; cursor: pointer; font-family: var(--font); transition: all .18s; }
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-d); text-decoration: none; }
.btn-ghost { background: var(--c-surface-2); color: var(--c-text); border-color: var(--c-border); }
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); text-decoration: none; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- Calculators ---------- */
.calc { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm); }
.calc h3 { display: flex; align-items: center; gap: 10px; font-size: 18px; }
.calc .calc-ic { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg,var(--c-primary),var(--c-accent)); font-size: 16px; }
.calc-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(150px,1fr)); gap: 14px; margin: 14px 0; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--c-text-soft); margin-bottom: 5px; }
.field input, .field select { width: 100%; height: 42px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--c-border);
  background: var(--c-surface-2); color: var(--c-text); font-size: 15px; font-family: var(--font); }
.field input:focus, .field select:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-l); }
.field .unit { font-size: 11px; color: var(--c-text-mute); font-weight: 500; }
.calc-result { margin-top: 14px; padding: 16px 18px; border-radius: var(--radius-sm); background: var(--c-primary-l); border: 1px solid color-mix(in srgb,var(--c-primary) 30%,transparent); }
.calc-result .cr-main { font-size: 26px; font-weight: 800; font-family: var(--font-head); color: var(--c-primary-d); }
html[data-theme="dark"] .calc-result .cr-main { color: var(--c-primary); }
.calc-result .cr-sub { font-size: 13.5px; color: var(--c-text-soft); margin-top: 4px; }
.calc-result.is-warn { background: var(--c-warn-l); border-color: color-mix(in srgb,var(--c-warn) 30%,transparent); }
.calc-result.is-warn .cr-main { color: var(--c-warn); }
.calc-result.is-danger { background: var(--c-danger-l); border-color: color-mix(in srgb,var(--c-danger) 30%,transparent); }
.calc-result.is-danger .cr-main { color: var(--c-danger); }
.calc-result.is-ok { background: var(--c-ok-l); border-color: color-mix(in srgb,var(--c-ok) 30%,transparent); }
.calc-result.is-ok .cr-main { color: var(--c-ok); }
.calc-note { font-size: 12.5px; color: var(--c-text-mute); margin-top: 10px; }

/* ---------- Interactive Guide / Flowchart ---------- */
.guide-hero { background: var(--c-surface); border: 1px solid var(--c-border); border-left: 5px solid var(--c-primary);
  border-radius: var(--radius); padding: 26px 28px; margin-bottom: 24px; box-shadow: var(--shadow-sm); position: relative; }
.guide-hero h1 { color: var(--c-heading); }
.guide-hero p { color: var(--c-text-soft); max-width: 70ch; margin: 0; }
.scenario-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(210px,1fr)); gap: 14px; }
.scenario-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 18px; cursor: pointer;
  display: flex; flex-direction: column; gap: 8px; transition: transform .2s, box-shadow .2s, border-color .2s; box-shadow: var(--shadow-sm); }
.scenario-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-border-strong); }
.scenario-card .sc-ic { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; font-size: 22px; color: #fff; }
.scenario-card h3 { font-size: 16px; margin: 0; }
.scenario-card p { font-size: 13px; color: var(--c-text-soft); margin: 0; }

.flow-wrap { animation: fade .3s; }
.flow-path { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 18px; font-size: 13px; }
.flow-path .fp-step { background: var(--c-surface-2); border: 1px solid var(--c-border); padding: 5px 12px; border-radius: 999px; color: var(--c-text-soft); }
.flow-path .fp-step.cur { background: var(--c-primary); color: #fff; border-color: var(--c-primary); font-weight: 600; }
.flow-path .fp-arrow { color: var(--c-text-mute); }

.flow-question { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-md); }
.flow-question .fq-step { font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--c-primary); margin-bottom: 8px; }
.flow-question h2 { font-size: 23px; margin-bottom: 6px; }
.flow-question .fq-hint { font-size: 14px; color: var(--c-text-soft); margin-bottom: 18px; }
.flow-opts { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit,minmax(200px,1fr)); }
.flow-opt { padding: 16px 18px; border-radius: var(--radius-sm); border: 1.5px solid var(--c-border); background: var(--c-surface-2);
  text-align: left; cursor: pointer; font-size: 15px; font-weight: 600; color: var(--c-text); transition: all .18s; display: flex; align-items: center; gap: 12px; font-family: var(--font); }
.flow-opt:hover { border-color: var(--c-primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.flow-opt .fo-ic { width: 34px; height: 34px; border-radius: 9px; background: var(--c-primary-l); color: var(--c-primary); display: grid; place-items: center; flex-shrink: 0; }
.flow-opt small { display: block; font-weight: 400; font-size: 12.5px; color: var(--c-text-mute); }

.flow-result { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); animation: fade .3s; }
.fr-banner { padding: 22px 26px; color: var(--c-heading); background: var(--c-primary-l); border-bottom: 1px solid var(--c-border); border-left: 5px solid var(--c-primary); }
.fr-banner .fr-eyebrow { font-size: 12px; letter-spacing: 1px; text-transform: uppercase; color: var(--c-primary-d); font-weight: 700; }
.fr-banner h2 { color: var(--c-heading); font-size: 26px; margin: 4px 0 0; }
.fr-body { padding: 22px 26px; }
.fr-block { margin-bottom: 20px; }
.fr-block h4 { display: flex; align-items: center; gap: 9px; font-size: 15px; margin-bottom: 8px; }
.fr-block h4 i { color: var(--c-primary); }
.fr-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }

/* ---------- Modal ---------- */
.modal { position: fixed; inset: 0; z-index: 100; background: rgba(8,20,28,.55); backdrop-filter: blur(3px);
  display: grid; place-items: center; padding: 18px; animation: fade .2s; }
.modal-card { background: var(--c-surface); border-radius: var(--radius); width: min(680px, 100%); max-height: 88vh; overflow: auto;
  box-shadow: var(--shadow-lg); position: relative; padding: 26px; }
.modal-close { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border-radius: 10px; border: none;
  background: var(--c-surface-2); color: var(--c-text-soft); cursor: pointer; font-size: 16px; }
.modal-close:hover { background: var(--c-danger-l); color: var(--c-danger); }

/* ---------- Case ---------- */
.case-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm); }
.case-vitals { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.vital { background: var(--c-surface-2); border: 1px solid var(--c-border); border-radius: 10px; padding: 8px 13px; font-size: 13px; }
.vital b { display: block; font-size: 16px; color: var(--c-text); font-family: var(--font-head); }
.vital span { color: var(--c-text-mute); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }

/* ---------- Checklist ---------- */
.checklist { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.checklist li { display: flex; align-items: flex-start; gap: 12px; padding: 11px 14px; background: var(--c-surface-2); border: 1px solid var(--c-border); border-radius: var(--radius-sm); cursor: pointer; font-size: 14.5px; transition: all .15s; }
.checklist li:hover { border-color: var(--c-primary); }
.checklist li .cl-box { width: 22px; height: 22px; border-radius: 6px; border: 2px solid var(--c-border-strong); flex-shrink: 0; display: grid; place-items: center; color: transparent; transition: all .15s; margin-top: 1px; }
.checklist li.done { background: var(--c-ok-l); border-color: color-mix(in srgb,var(--c-ok) 30%,transparent); }
.checklist li.done .cl-box { background: var(--c-ok); border-color: var(--c-ok); color: #fff; }
.checklist li.done span { text-decoration: line-through; color: var(--c-text-mute); }

/* ---------- Ultrasound schematic (CSS art) ---------- */
.usimg { position: relative; width: 100%; max-width: 360px; aspect-ratio: 4/3; margin: 0 auto; border-radius: 12px;
  background: var(--c-surface-2); overflow: hidden; border: 1px solid var(--c-border); }
.usimg .us-label { position: absolute; bottom: 8px; left: 10px; color: var(--c-text-mute); font-size: 11px; font-family: monospace; letter-spacing: .5px; }

/* ---------- Footer note ---------- */
.safety-banner { background: var(--c-warn-l); border: 1px solid color-mix(in srgb,var(--c-warn) 35%,transparent); border-radius: var(--radius);
  padding: 18px 22px; margin-top: 40px; font-size: 14px; color: var(--c-text); }
.safety-banner b { color: var(--c-warn); }

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .sidebar { position: fixed; left: 0; top: var(--topbar-h); z-index: 55; transform: translateX(-100%); transition: transform .28s; box-shadow: var(--shadow-lg); }
  .sidebar.open { transform: translateX(0); }
  .scrim.show { display: block; position: fixed; inset: var(--topbar-h) 0 0 0; background: rgba(8,20,28,.45); z-index: 50; }
}
@media (max-width: 720px) {
  .topbar-search { display: none; }
  .topbar-search.mobile-open { display: block; position: absolute; left: 12px; right: 12px; top: 10px; max-width: none; background: var(--c-surface); padding: 4px; border-radius: 999px; box-shadow: var(--shadow-md); z-index: 70; }
  #searchToggle { display: grid; }
  .content { padding: 22px 16px 70px; }
}
#menuToggle { display: none; }
@media (max-width: 1000px) { #menuToggle { display: grid; } }

/* FAB */
.fab-top { position: fixed; right: 20px; bottom: 22px; width: 46px; height: 46px; border-radius: 50%; border: none;
  background: var(--c-primary); color: #fff; cursor: pointer; box-shadow: var(--shadow-md); z-index: 40; font-size: 16px; transition: transform .2s; }
.fab-top:hover { transform: translateY(-3px); }

/* utility */
.muted { color: var(--c-text-mute); }
.center { text-align: center; }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; }
.divider { height: 1px; background: var(--c-border); margin: 24px 0; border: none; }
hr { border: none; height: 1px; background: var(--c-border); margin: 20px 0; }

/* ---------- Media cards (real POCUS images/videos) ---------- */
.media-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; margin-top: 16px; }
.media-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column; transition: box-shadow .2s; }
.media-card:hover { box-shadow: var(--shadow-md); }
.media-card.real-media { border-color: var(--c-green); border-width: 2px; }
.media-frame { position: relative; width: 100%; padding-top: 56.25%; background: #000; }
.media-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }
.media-img { width: 100%; height: auto; max-height: 400px; object-fit: contain; background: #0a0a12; display: block; }
.media-video { width: 100%; max-height: 400px; background: #0a0a12; display: block; }
.media-cap { padding: 12px 14px 6px; font-size: 14px; color: var(--c-text); line-height: 1.4; }
.media-cap b { color: var(--c-heading); }
.media-credit { padding: 4px 14px 12px; font-size: 12px; color: var(--c-text-mute); display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.media-credit a { color: var(--c-primary); text-decoration: none; margin-left: auto; white-space: nowrap; }
.media-credit a:hover { text-decoration: underline; }
.media-credit-inline { font-size: 12px; color: var(--c-text-mute); }
.media-link { display: flex; flex-direction: row; align-items: center; gap: 14px; padding: 16px; text-decoration: none; color: var(--c-text); }
.media-link .ml-ic { font-size: 22px; color: var(--c-primary); flex-shrink: 0; }
.media-link p { margin: 4px 0 0; font-size: 13px; color: var(--c-text-soft); }
@media (max-width: 720px) { .media-grid { grid-template-columns: 1fr; } }