/* Edukanatomy · visor del corazón 3D */
.h3d-page{max-width:1440px;margin:0 auto;padding:18px clamp(14px,3vw,32px) 0;outline:none}
.h3d-eyebrow{margin:0 0 6px;font:800 .74rem/1.2 var(--font);letter-spacing:.16em;color:var(--teal);text-transform:uppercase}
.h3d-intro{display:flex;gap:24px;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;margin:10px 0 18px}
.h3d-intro h1{font-size:clamp(2rem,4.2vw,3.3rem);margin:0 0 8px}
.h3d-lead{max-width:760px;color:var(--muted);font-size:1.08rem;margin:0}
.h3d-intro-actions{display:flex;gap:10px;flex-wrap:wrap}
.h3d-layout{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:20px;align-items:start}
@media (max-width:1100px){.h3d-layout{grid-template-columns:minmax(0,1fr)}}
.h3d-stage-wrap{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden;position:relative}
.h3d-toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;padding:12px 14px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff,#F8FBFD)}
.h3d-spacer{flex:1}
.h3d-views{display:flex;gap:6px;flex-wrap:wrap}
.h3d-tool{min-height:44px;padding:8px 14px;border-radius:12px;border:1px solid var(--line);background:#fff;font:700 .88rem var(--font);color:var(--ink);cursor:pointer}
.h3d-tool:hover{border-color:var(--cyan)}
.h3d-tool[aria-pressed="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.h3d-tool-field{display:inline-flex;align-items:center;gap:8px;font:600 .88rem var(--font)}
.h3d-tool-field select{min-height:44px;border-radius:12px;border:1px solid var(--line);padding:6px 10px;font:600 .9rem var(--font);background:#fff;color:var(--ink)}
.h3d-stage{position:relative;height:min(74vh,760px);min-height:440px;background:
  radial-gradient(circle at 50% 42%,rgba(44,201,230,.14),transparent 55%),
  radial-gradient(circle at 80% 90%,rgba(252,230,98,.18),transparent 45%),
  linear-gradient(180deg,#FBFDFE,#EEF5F9)}
.h3d-stage::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(42,79,105,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(42,79,105,.06) 1px,transparent 1px);background-size:40px 40px;mask-image:radial-gradient(circle at 50% 50%,#000 30%,transparent 75%);pointer-events:none}
.h3d-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab;touch-action:none}
.h3d-canvas:active{cursor:grabbing}
.h3d-canvas:focus-visible{outline:3px solid var(--teal);outline-offset:-3px}
.h3d-overlay{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.h3d-lines{position:absolute;inset:0}
.h3d-leader{fill:none;stroke:#0D2131;stroke-width:1.4;opacity:.7}
.h3d-leader.is-occluded{stroke-dasharray:4 4;opacity:.35}
.h3d-leader.is-selected{stroke:#0A7690;stroke-width:2.4;opacity:1}
.h3d-dot{fill:#fff;stroke:#0D2131;stroke-width:1.6}
.h3d-dot.is-occluded{opacity:.4}
.h3d-label{position:absolute;left:0;top:0;padding:4px 10px;border-radius:9px;background:rgba(255,255,255,.95);border:1px solid rgba(13,33,49,.18);font:700 .86rem/1.25 var(--font);color:#0D2131;white-space:nowrap;box-shadow:0 4px 14px -6px rgba(13,33,49,.35);will-change:transform}
.h3d-label.is-occluded{opacity:.5}
.h3d-label.is-selected{background:#0D2131;color:#fff;border-color:#0D2131}
.h3d-label.is-marker{padding:0;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;background:#FCE662;border:2px solid #0D2131}
.h3d-badge{position:absolute;right:14px;bottom:14px;z-index:2;padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.92);border:1px solid var(--line);font:700 .76rem var(--font);color:var(--muted)}
.h3d-phase-chip{position:absolute;left:14px;bottom:14px;z-index:2;display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:#0D2131;color:#fff;font:700 .85rem var(--font)}
.h3d-phase-dot{width:9px;height:9px;border-radius:50%;background:#FCE662;box-shadow:0 0 0 0 rgba(252,230,98,.7);animation:h3dBeat 1s infinite}
@keyframes h3dBeat{0%{box-shadow:0 0 0 0 rgba(252,230,98,.7)}70%{box-shadow:0 0 0 10px rgba(252,230,98,0)}}
.h3d-fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:30px;text-align:center;background:#fff;z-index:3}
.h3d-under{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:12px 16px;border-top:1px solid var(--line)}
.h3d-hint{margin:0;color:var(--muted);font-size:.88rem}
.h3d-xr{display:flex;gap:8px;align-items:center;font:600 .85rem var(--font)}
.h3d-xr button{position:static!important;min-height:40px;padding:6px 14px!important;border-radius:999px!important;border:1px solid var(--line)!important;background:#fff!important;color:var(--ink)!important;font:700 .85rem var(--font)!important;opacity:1!important;width:auto!important;left:auto!important;bottom:auto!important}
.h3d-panel{display:grid;gap:14px}
.h3d-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 8px 30px -20px rgba(20,60,90,.35)}
.h3d-card h2{margin:0 0 8px;font-size:1.25rem}
.h3d-card-title{font-size:1.05rem!important}
.h3d-card p{margin:0 0 10px;color:var(--muted)}
.h3d-phase{background:linear-gradient(160deg,#fff 60%,rgba(44,201,230,.12))}
.h3d-valves{margin:12px 0;display:grid;gap:6px}
.h3d-valves div{display:flex;justify-content:space-between;gap:10px;padding:8px 0;border-top:1px solid var(--line);font-size:.9rem}
.h3d-valves dt{font-weight:600}
.h3d-valves dd{margin:0;font-weight:800;color:var(--teal)}
.h3d-valves dd.closed{color:#8A3A1E}
.h3d-phase-bar{display:flex;height:10px;border-radius:99px;overflow:hidden;margin:6px 0 14px;background:#E8EFF4}
.h3d-phase-bar i{display:block;height:100%;border-right:2px solid #fff;background:#CFE6EE}
.h3d-phase-bar i.on{background:var(--cyan)}
.h3d-note{font-size:.82rem}
.h3d-layers{border:0;padding:0;margin:0 0 6px}
.h3d-layers legend{font-weight:700;margin-bottom:8px}
#layers{display:flex;flex-wrap:wrap;gap:8px}
.h3d-chip{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;font:700 .85rem var(--font);cursor:pointer;color:var(--ink)}
.h3d-chip[aria-pressed="true"]{background:#0D2131;color:#fff;border-color:#0D2131}
.h3d-chip i{width:12px;height:12px;border-radius:50%;border:1px solid rgba(0,0,0,.25)}
.h3d-row{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 0;border-top:1px solid var(--line);font-weight:600;font-size:.92rem}
.h3d-range{display:grid;gap:4px;padding:6px 0 10px;font:600 .88rem var(--font)}
.h3d-range input{width:100%;accent-color:var(--teal);min-height:32px}
.h3d-level{margin-top:10px;width:100%;justify-content:space-between}
.h3d-info-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.h3d-list{display:grid;gap:12px;max-height:340px;overflow:auto;padding-right:4px}
.h3d-list h3{margin:0 0 6px;font:800 .74rem var(--font);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.h3d-list ul{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.h3d-list button{width:100%;text-align:left;min-height:40px;padding:8px 12px;border-radius:10px;border:1px solid transparent;background:#F5F9FC;font:600 .9rem var(--font);color:var(--ink);cursor:pointer;display:flex;gap:10px;align-items:center}
.h3d-list button:hover{border-color:var(--cyan)}
.h3d-list button[aria-current="true"]{background:#0D2131;color:#fff}
.h3d-list .num{display:inline-flex;width:24px;height:24px;border-radius:50%;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);font-size:.75rem;color:var(--ink);flex:0 0 auto}
.h3d-practice .h3d-ask{font-size:1.05rem;color:var(--ink)}
.h3d-practice #practice-box{display:grid;gap:10px;margin-top:10px}
#practice-feedback.ok{color:#0A6B3B;font-weight:700}
#practice-feedback.no{color:#9A2B1A;font-weight:700}
.h3d-limits{margin:28px 0 0;padding:26px;background:#fff;border:1px solid var(--line);border-radius:24px}
.h3d-limits h2{margin:0 0 14px;font-size:1.4rem}
.h3d-limits-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.h3d-limits h3{font-size:1rem;margin:0 0 6px}
.h3d-limits p{margin:0;color:var(--muted)}
@media (max-width:900px){.h3d-limits-grid{grid-template-columns:1fr}.h3d-stage{height:62vh;min-height:380px}}
html.a11y-contrast .h3d-label{background:#fff;border-color:#0D2131}
@media (max-width:640px){.h3d-badge{top:12px;bottom:auto;right:12px;font-size:.7rem}.h3d-phase-chip{font-size:.8rem}}