:root{
  --bg:#0a0f16;
  --panel:rgba(255,255,255,.08);
  --panel-strong:rgba(255,255,255,.12);
  --border:rgba(255,255,255,.14);
  --text:#edf4ff;
  --muted:#a7b4c7;
  --accent:#67d4ff;
  --danger:#ff5d6c;
  --success:#2ed085;
  --warning:#ffcc4d;
  --gravity:#e0564a;
  --movement:#f4c542;
  --frequency:#3d7cff;
  --sandbox:#39ca7b;
  --magnetism:#00b894;
  --shadow:0 20px 50px rgba(0,0,0,.35);
  --radius:24px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  background:
    radial-gradient(circle at top left, rgba(103,212,255,.18), transparent 26%),
    radial-gradient(circle at bottom right, rgba(57,202,123,.12), transparent 25%),
    var(--bg);
  color:var(--text);
  overflow:hidden;
}
button,input,select{font:inherit}
button{cursor:pointer}
.hidden{display:none !important}
#app{position:relative;width:100%;height:100%}

.screen,.overlay-screen{
  position:absolute;inset:0;width:100%;height:100%;
}

.screen-menu{
  background:url('Laboratorio.jpg') center/cover no-repeat fixed;
}
.menu-backdrop{
  position:absolute;inset:0;background:linear-gradient(180deg, rgba(8,12,20,.35), rgba(8,12,20,.75));
  backdrop-filter: blur(2px);
}
.menu-header{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:space-between;
  padding:24px 28px 12px;
}
.brand{display:flex;align-items:center;gap:16px}
.brand-badge{
  width:56px;height:56px;border-radius:18px;
  display:grid;place-items:center;
  background:linear-gradient(145deg, rgba(103,212,255,.25), rgba(255,255,255,.08));
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.brand-badge .material-icons{font-size:30px}
.brand h1{margin:0;font-size:2rem;letter-spacing:.5px}
.brand p{margin:2px 0 0;color:rgba(255,255,255,.78)}
.menu-status{display:flex;gap:12px;align-items:center}
.status-pill{
  display:flex;align-items:center;gap:8px;padding:12px 16px;border-radius:999px;
  background:rgba(6,11,20,.42);backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.12);
}
.status-pill .material-icons{color:#ff6a7a}
.menu-main{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(260px, 420px) 1fr;
  gap:22px;padding:10px 24px 24px;height:calc(100% - 92px);
}
.hero-panel{
  align-self:start;padding:24px;border-radius:var(--radius);
  background:linear-gradient(180deg, rgba(17,24,36,.8), rgba(8,12,20,.45));
  border:1px solid rgba(255,255,255,.1);
}
.eyebrow{margin:0 0 10px;text-transform:uppercase;letter-spacing:.2em;font-size:.75rem;color:var(--accent)}
.hero-panel h2{margin:0 0 10px;font-size:2.2rem;line-height:1.05}
.hero-panel p{margin:0;color:var(--muted);line-height:1.6}
.hero-chips{margin-top:18px;display:flex;flex-wrap:wrap;gap:10px}
.hero-chips span,.sandbox-panel p,.sandbox-panel h2{position:relative;z-index:1}
.hero-chips span{
  padding:9px 12px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1)
}
.level-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:16px;
  align-content:start;
  overflow:auto;
  padding-right:8px;
}
.level-card{
  position:relative;min-height:124px;border:0;color:var(--text);text-align:left;
  border-radius:26px;padding:16px 16px 14px;overflow:hidden;
  background:linear-gradient(180deg, rgba(255,255,255,.12), rgba(255,255,255,.05));
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow);transition:transform .2s ease, opacity .2s ease, filter .2s ease;
}
.level-card:hover{transform:translateY(-4px)}
.level-card.locked{filter:saturate(.2) brightness(.66);opacity:.72}
.level-card .card-glow{
  position:absolute;inset:auto -24px -24px auto;width:110px;height:110px;border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,.2), transparent 66%);
  opacity:.65;
}
.level-card .card-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.level-card .num{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-weight:800;
  background:rgba(0,0,0,.18);border:1px solid rgba(255,255,255,.12)
}
.level-card .material-icons{font-size:31px}
.level-card .label{margin-top:16px;font-size:1.02rem;font-weight:700}
.level-card .desc{margin-top:4px;font-size:.88rem;color:rgba(255,255,255,.83)}
.level-card.gravity{background:linear-gradient(180deg, rgba(224,86,74,.95), rgba(134,25,18,.85))}
.level-card.movement{background:linear-gradient(180deg, rgba(244,197,66,.96), rgba(138,104,8,.84)); color:#271b00}
.level-card.movement .desc,.level-card.movement .label{color:#271b00}
.level-card.movement .num{background:rgba(255,255,255,.18);border-color:rgba(0,0,0,.08)}
.level-card.frequency{background:linear-gradient(180deg, rgba(61,124,255,.95), rgba(25,52,131,.86))}
.level-card.sandbox{background:linear-gradient(180deg, rgba(57,202,123,.95), rgba(14,95,52,.85))}
.level-card.magnetism{background:linear-gradient(180deg, rgba(0,184,148,.95), rgba(0,100,80,.85))}
.level-card .lock-badge{
  position:absolute;top:14px;right:14px;
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:rgba(0,0,0,.18);border:1px solid rgba(255,255,255,.12)
}
.level-card .lock-badge .material-icons{font-size:19px}
.glass{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  box-shadow:var(--shadow);
  backdrop-filter:blur(20px);
}
.scene-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  filter:saturate(1.04) contrast(1.02);
}
.scene-learning-bg{background:linear-gradient(180deg, #fefefe, #edf5ff)}
.scene-sim-bg{background:#0a1425}
.scene-exam-bg{background:linear-gradient(180deg, #ffffff, #eef3f8)}
.scene-sandbox-bg{background:url('paisaje4.jpg') center/cover no-repeat}
.topbar{
  position:relative;z-index:1;
  display:grid;grid-template-columns:64px 1fr 64px;align-items:center;
  gap:12px;padding:18px 20px 0;
}
.top-title{
  text-align:center;font-weight:800;font-size:1.15rem;letter-spacing:.04em;
  color:var(--text);text-shadow:0 4px 18px rgba(0,0,0,.35)
}
.icon-btn{
  width:48px;height:48px;border-radius:16px;border:1px solid rgba(255,255,255,.16);
  background:rgba(0,0,0,.18);color:#fff;display:grid;place-items:center;
  box-shadow:var(--shadow);backdrop-filter:blur(16px)
}
.icon-btn .material-icons{font-size:24px}
.cheat-btn{justify-self:end}
.content-shell{
  position:relative;z-index:1;
  min-height:calc(100% - 90px);
  display:grid;place-items:center;padding:18px;
}
.center-panel{
  width:min(920px, 100%);border-radius:30px;padding:24px 24px 26px;
  background:rgba(255,255,255,.92);color:#19212e;overflow:auto
}
.center-panel .title{
  margin:0 0 12px;font-size:1.8rem;color:#111827
}
.center-panel .subtitle{color:#475569;line-height:1.6}
.learning-layout{
  display:grid;grid-template-columns:1fr;gap:18px;align-items:center;justify-items:center
}
.video-frame{
  width:min(640px, 100%);border-radius:24px;overflow:hidden;
  background:#020617;border:1px solid rgba(2,6,23,.12);box-shadow:var(--shadow)
}
.video-frame video{width:100%;display:block;background:#000}
.play-action{
  border:0;border-radius:18px;padding:14px 20px;font-weight:800;color:#fff;
  background:linear-gradient(135deg, #3d7cff, #67d4ff);display:inline-flex;align-items:center;gap:10px;
  box-shadow:0 16px 30px rgba(61,124,255,.28)
}
.question-box{
  width:min(740px,100%);padding:22px;border-radius:24px;
  background:rgba(244,247,252,.95);border:1px solid rgba(15,23,42,.08)
}
.question-text{font-size:1.18rem;font-weight:700;color:#0f172a;margin:0 0 18px;text-align:center}
.option-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.option-btn{
  border:1px solid rgba(15,23,42,.12);background:#fff;border-radius:18px;padding:14px 16px;font-weight:700;
  color:#111827;box-shadow:0 10px 28px rgba(15,23,42,.06);transition:.18s ease
}
.option-btn:hover{transform:translateY(-2px)}
.option-btn:disabled{opacity:.7;cursor:not-allowed}
.option-btn.correct{background:rgba(46,208,133,.15);border-color:rgba(46,208,133,.5)}
.option-btn.wrong{background:rgba(255,93,108,.14);border-color:rgba(255,93,108,.45)}
.learning-note{
  margin:0 auto 18px;max-width:760px;text-align:center;color:#475569;line-height:1.7;
  font-size:1.03rem
}
.sim-layout{
  position:relative;z-index:1;
  height:calc(100% - 90px);display:grid;grid-template-columns:minmax(0, 1.45fr) minmax(310px,.65fr);gap:18px;padding:18px
}
.sim-stage,.sim-controls{
  border-radius:28px;overflow:hidden
}
.sim-stage{
  display:grid;grid-template-rows:auto 1fr;background:rgba(4,9,17,.65)
}
.sim-header{
  padding:16px 18px;border-bottom:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.04)
}
.sim-header h3{margin:0;font-size:1.2rem}
.sim-header p{margin:6px 0 0;color:rgba(255,255,255,.75)}
.sim-canvas-wrap{position:relative;min-height:420px;display:grid;place-items:center}
.sim-canvas-wrap canvas{width:100%;height:100%;display:block}
.sim-controls{
  padding:16px;overflow:auto;
  background:rgba(8,13,22,.75)
}
.control-group{margin-bottom:14px}
.control-group label{
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  font-size:.92rem;font-weight:700;margin-bottom:8px;color:#e9f2ff
}
.control-group output,.value-badge{
  padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.08);
  font-size:.82rem;color:#fff
}
.control-group input[type="range"]{width:100%}
.control-group select,.control-group input[type="number"]{
  width:100%;border-radius:14px;border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.08);color:#fff;padding:11px 12px
}
.control-group select option{color:#111827}
.action-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.action-row .primary,.action-row .secondary,.action-row .danger{
  border:0;border-radius:14px;padding:12px 16px;font-weight:800
}
.primary{background:linear-gradient(135deg, #2ed085, #14a96b);color:#062012}
.secondary{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.12)}
.danger{background:linear-gradient(135deg, #ff6a7a, #d94858);color:#fff}
.sim-info{
  margin-top:10px;color:rgba(255,255,255,.78);line-height:1.6;font-size:.95rem
}
.sandbox-root{
  position:relative;z-index:1;height:calc(100% - 90px);padding:18px
}
.sandbox-home,.sandbox-mode{height:100%}
.sandbox-home{
  display:grid;grid-template-rows:auto 1fr;gap:18px
}
.sandbox-panel{
  width:min(920px, 100%);margin:0 auto;border-radius:28px;padding:24px;background:rgba(255,255,255,.1)
}
.sandbox-panel h2{margin:0 0 10px;font-size:2rem}
.sandbox-panel p{margin:0;color:rgba(255,255,255,.82);line-height:1.6}
.sandbox-cards{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;align-content:start
}
.sandbox-card{
  border:0;border-radius:26px;padding:18px;text-align:left;color:#f8fffb;min-height:160px;
  background:linear-gradient(180deg, rgba(57,202,123,.96), rgba(14,95,52,.88));
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.1);position:relative;overflow:hidden
}
.sandbox-card:nth-child(2){background:linear-gradient(180deg, rgba(61,124,255,.94), rgba(25,52,131,.88))}
.sandbox-card:nth-child(3){background:linear-gradient(180deg, rgba(244,197,66,.94), rgba(138,104,8,.88));color:#231800}
.sandbox-card:nth-child(4){background:linear-gradient(180deg, rgba(0,184,148,.95), rgba(0,100,80,.88))}
.sandbox-card .material-icons{font-size:34px}
.sandbox-card h3{margin:14px 0 8px;font-size:1.2rem}
.sandbox-card p{margin:0;opacity:.92;line-height:1.5}
.sandbox-card .pill{position:absolute;top:14px;right:14px;background:rgba(255,255,255,.18);padding:6px 10px;border-radius:999px}
.sandbox-mode-inner{
  width:100%;height:100%;border-radius:28px;padding:16px;background:rgba(4,9,17,.7)
}
.sandbox-mode-header{
  display:grid;grid-template-columns:56px 1fr 56px;align-items:center;gap:10px;padding-bottom:14px
}
.sandbox-mode-body{height:calc(100% - 72px);display:grid;grid-template-rows:auto 1fr auto;gap:14px}
.sandbox-grid{
  display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);gap:16px;height:100%
}
.sandbox-stage{
  border-radius:24px;overflow:hidden;background:rgba(255,255,255,.04)
}
.sandbox-stage canvas{width:100%;height:100%;display:block}
.sandbox-tools{
  display:flex;flex-direction:column;gap:14px;overflow:auto;padding-right:4px
}
.sandbox-tools .tool{
  border-radius:20px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);padding:14px
}
.tool h4{margin:0 0 10px}
.tool p{margin:0;color:rgba(255,255,255,.72);line-height:1.55}
.modal-layer,.toast-layer{
  position:absolute;inset:0;pointer-events:none;z-index:10
}
.modal-backdrop{
  position:absolute;inset:0;background:rgba(3,7,18,.66);display:grid;place-items:center;pointer-events:auto
}
.modal-card{
  width:min(520px, calc(100% - 30px));
  border-radius:28px;padding:22px;background:rgba(10,17,30,.94);border:1px solid rgba(255,255,255,.12);
  box-shadow:0 30px 80px rgba(0,0,0,.45)
}
.modal-card h3{margin:0 0 10px;font-size:1.5rem}
.modal-card p{margin:0 0 18px;color:rgba(255,255,255,.82);line-height:1.6}
.modal-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
.modal-actions button{
  border:0;border-radius:16px;padding:12px 16px;font-weight:800
}
.modal-actions .primary{color:#062012}
.modal-actions .secondary{color:#fff}
.countdown{
  margin-top:10px;font-size:.9rem;color:#9fb0c9
}
.toast{
  position:absolute;left:50%;bottom:24px;transform:translateX(-50%);
  background:rgba(10,17,30,.95);border:1px solid rgba(255,255,255,.12);color:#fff;
  padding:12px 16px;border-radius:999px;box-shadow:var(--shadow);pointer-events:none
}
.overlay-screen{
  background:#01040a;display:grid;place-items:center;z-index:20
}
.transition-video{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.96
}
.transition-caption{
  position:relative;z-index:1;display:flex;align-items:center;gap:12px;
  padding:14px 18px;border-radius:20px;background:rgba(2,6,23,.52);border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow)
}
.transition-caption .material-icons{font-size:28px;color:#67d4ff}
.transition-caption strong{display:block;font-size:1rem}
.transition-caption small{color:rgba(255,255,255,.7)}
.lives-row{
  display:flex;gap:8px;align-items:center;flex-wrap:wrap
}
.lives-row img{width:26px;height:26px;object-fit:contain;filter:drop-shadow(0 2px 5px rgba(0,0,0,.3))}
.subtle{color:var(--muted)}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)
}
.question-progress{
  display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;color:#64748b;font-weight:700
}
.result-box{
  display:grid;gap:12px;justify-items:center;text-align:center
}
.result-score{
  font-size:3rem;font-weight:900;line-height:1;color:#0f172a
}
.result-label{
  font-size:1.05rem;font-weight:800
}
canvas{image-rendering:auto}
@media (max-width: 1100px){
  .menu-main,.sim-layout,.sandbox-grid{grid-template-columns:1fr}
  .level-grid,.sandbox-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sim-layout{overflow:auto}
}
@media (max-width: 760px){
  body{overflow:auto}
  .menu-header{flex-direction:column;align-items:flex-start;gap:12px}
  .menu-main{height:auto}
  .level-grid,.sandbox-cards{grid-template-columns:1fr}
  .topbar{grid-template-columns:56px 1fr 56px;padding:12px 12px 0;position:sticky;top:0;z-index:10;background:rgba(8,12,20,.9);backdrop-filter:blur(10px)}
  .content-shell,.sandbox-root{padding:12px}
  .center-panel{min-height:auto;padding:18px}
  .option-grid{grid-template-columns:1fr}
  .sim-layout{padding:12px;height:auto}
  .sim-canvas-wrap{min-height:330px}
}