/* ============================================================
   SCIENCE LAB — Estilos
   Colección EL TÍO IA · eltioia.cl
   Estética: laboratorio limpio y moderno. No infantil.
   ============================================================ */

:root{
  --bg:       #0b1220;
  --panel:    #131c30;
  --panel-2:  #1b2740;
  --line:     rgba(255,255,255,.12);
  --text:     #eaf0fb;
  --text-dim: #93a3bd;
  --cyan:     #22d3ee;
  --green:    #4ade80;
  --amber:    #facc15;
  --red:      #f87171;
  --violet:   #a78bfa;
  --accent:   #22d3ee;   /* lo cambia cada área */
  --radius:   18px;
  --shadow:   0 20px 48px rgba(0,0,0,.45);
  --font-title:"Sora", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
[hidden]{ display:none !important; }

body{
  min-height:100dvh;
  font-family:var(--font-body);
  color:var(--text);
  background:
    radial-gradient(900px 560px at 12% -8%, rgba(34,211,238,.14) 0%, transparent 60%),
    radial-gradient(800px 560px at 88% 105%, rgba(167,139,250,.13) 0%, transparent 60%),
    var(--bg);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-text-size-adjust:100%;
}

.grid-bg{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(circle at 50% 20%, #000 0%, transparent 80%);
  -webkit-mask-image:radial-gradient(circle at 50% 20%, #000 0%, transparent 80%);
}

/* ---------- Barra superior ---------- */
.topbar{
  position:sticky; top:0; z-index:30;
  display:flex; align-items:center; gap:12px; flex-wrap:wrap;
  padding:10px clamp(12px,3vw,24px);
  background:rgba(11,18,32,.85); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand-mini{ font-family:var(--font-title); font-weight:700; font-size:15px; }
.top-stats{ display:flex; gap:14px; margin-left:auto; font-size:13px; color:var(--text-dim); }
.top-stats b{ color:var(--cyan); font-family:var(--font-title); }
.top-actions{ display:flex; gap:8px; }
.tool{
  font-family:var(--font-body); font-weight:600; font-size:13px;
  background:rgba(255,255,255,.08); color:var(--text);
  border:1px solid var(--line); border-radius:10px;
  padding:8px 13px; cursor:pointer;
  transition:background .2s, border-color .2s, color .2s;
}
.tool:hover{ background:rgba(255,255,255,.16); border-color:var(--cyan); }
.tool:focus-visible{ outline:3px solid var(--amber); outline-offset:2px; }
.tool[aria-pressed="true"]{ background:rgba(167,139,250,.22); border-color:var(--violet); color:var(--violet); }

/* ---------- Pantallas ---------- */
#app{ position:relative; z-index:1; }
.screen{ display:none; padding:clamp(14px,3vw,32px); place-items:start center; min-height:70dvh; }
.screen.is-active{ display:grid; animation:in .38s ease both; }
@keyframes in{ from{ opacity:0; transform:translateY(14px);} to{ opacity:1; transform:none;} }

.card{
  width:min(880px,100%);
  background:linear-gradient(180deg, rgba(27,39,64,.9), rgba(15,23,42,.94));
  border:1px solid var(--line); border-radius:var(--radius);
  box-shadow:var(--shadow); padding:clamp(20px,4vw,40px);
  text-align:center; position:relative;
}

/* ---------- Inicio ---------- */
.lab-icon{ font-size:clamp(48px,12vw,80px); line-height:1; animation:float 4s ease-in-out infinite; display:inline-block; }
.lab-icon.small{ font-size:clamp(36px,8vw,52px); }
@keyframes float{ 0%,100%{ transform:translateY(0) rotate(-4deg);} 50%{ transform:translateY(-10px) rotate(4deg);} }

.title{
  font-family:var(--font-title); font-weight:700;
  font-size:clamp(30px,8vw,58px); letter-spacing:-.02em; margin:.08em 0 .12em;
  background:linear-gradient(100deg,var(--cyan) 0%, #7dd3fc 45%, var(--violet) 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.tagline{ font-size:clamp(14.5px,3.4vw,19px); color:var(--text-dim); margin:0 0 26px; line-height:1.6; }

.steps{ display:grid; grid-template-columns:repeat(2,1fr); gap:10px; margin-bottom:26px; }
@media (min-width:700px){ .steps{ grid-template-columns:repeat(4,1fr); } }
.step{
  background:rgba(255,255,255,.05); border:1px solid var(--line);
  border-radius:14px; padding:14px 10px; display:grid; gap:4px; justify-items:center;
}
.step span{ font-size:24px; }
.step b{ font-size:14px; }
.step small{ font-size:11.5px; color:var(--text-dim); line-height:1.4; }

.note{
  text-align:left; background:rgba(250,204,21,.08); border:1px solid rgba(250,204,21,.28);
  border-radius:14px; padding:14px 16px; font-size:13.5px; line-height:1.65;
  color:#e8dcb8; margin:22px 0 0;
}
.note b{ color:var(--amber); }

.brand{ margin:22px 0 10px; font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--text-dim); }
.brand strong{ color:var(--cyan); }

/* ---------- Botones ---------- */
.btn{
  font-family:var(--font-body); font-weight:700; cursor:pointer;
  border:none; border-radius:12px; padding:12px 22px; font-size:15px;
  text-decoration:none; display:inline-block;
  transition:transform .12s, box-shadow .2s, filter .2s, background .2s, color .2s, border-color .2s;
}
.btn:active{ transform:translateY(1px); }
.btn:focus-visible{ outline:3px solid var(--amber); outline-offset:3px; }
.btn:disabled{ opacity:.45; cursor:default; }

.btn-primary{
  background:linear-gradient(180deg,#22d3ee,#0e91a8); color:#03212a;
  box-shadow:0 5px 0 #0a6d80, 0 12px 26px rgba(34,211,238,.24);
}
.btn-primary:hover:not(:disabled){ filter:brightness(1.08); }
.btn-primary:active{ box-shadow:0 2px 0 #0a6d80; }
.btn-xl{ font-size:clamp(15px,3.6vw,19px); padding:15px 30px; width:100%; margin-top:16px; }

.btn-ghost{
  background:transparent; color:var(--text-dim);
  border:1.5px solid var(--line); font-size:14px; padding:10px 18px; font-weight:600;
}
.btn-ghost:hover{ border-color:var(--cyan); color:var(--text); }

.btn-back{
  background:rgba(255,255,255,.08); color:var(--text-dim);
  font-size:13px; padding:8px 14px; font-weight:600;
}
.btn-back:hover{ background:rgba(255,255,255,.16); }

#screen-cats .btn-back, #screen-explist .btn-back, #screen-results .btn-back{
  position:absolute; top:clamp(14px,3vw,20px); left:clamp(14px,3vw,20px);
}
#screen-cats .card, #screen-explist .card, #screen-results .card{ padding-top:clamp(58px,11vw,66px); }

.panel-title{ font-family:var(--font-title); font-size:clamp(22px,5.4vw,34px); margin:0 0 6px; }
.panel-sub{ color:var(--text-dim); margin:0 0 24px; font-size:14.5px; line-height:1.6; }
.sub-title{ font-family:var(--font-title); font-size:16px; margin:26px 0 12px; text-align:left; color:var(--cyan); }

/* ---------- Áreas ---------- */
.cat-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:12px; }
@media (min-width:760px){ .cat-grid{ grid-template-columns:repeat(3,1fr); } }
.cat-card{
  font-family:var(--font-body); cursor:pointer; color:var(--text);
  background:rgba(255,255,255,.05); border:2px solid var(--line);
  border-radius:16px; padding:18px 12px;
  display:grid; gap:4px; justify-items:center;
  transition:transform .14s, border-color .2s, box-shadow .2s, background .2s;
}
.cat-card:hover{ transform:translateY(-4px); border-color:var(--accent); box-shadow:0 14px 28px rgba(0,0,0,.35); }
.cat-card:focus-visible{ outline:3px solid var(--amber); outline-offset:3px; }
.cat-card .ci{ font-size:30px; line-height:1; }
.cat-card b{ font-size:15px; }
.cat-card .cc{ font-size:12px; color:var(--text-dim); }
.cat-card .cd{ font-size:11.5px; color:var(--accent); font-weight:600; }

/* ---------- Lista de experimentos ---------- */
.exp-grid{ display:grid; gap:11px; }
@media (min-width:720px){ .exp-grid{ grid-template-columns:repeat(2,1fr); } }
.exp-card{
  font-family:var(--font-body); cursor:pointer; text-align:left; color:var(--text);
  background:rgba(255,255,255,.05); border:2px solid var(--line);
  border-radius:15px; padding:15px 16px;
  display:flex; gap:13px; align-items:center;
  transition:transform .14s, border-color .2s, background .2s;
}
.exp-card:hover{ transform:translateY(-3px); border-color:var(--accent); }
.exp-card:focus-visible{ outline:3px solid var(--amber); outline-offset:3px; }
.exp-card .ei{ font-size:28px; flex:0 0 auto; }
.exp-card b{ display:block; font-size:16px; margin-bottom:2px; }
.exp-card small{ display:block; font-size:12.5px; color:var(--text-dim); line-height:1.45; }
.exp-card .check{ margin-left:auto; color:var(--green); font-size:20px; font-weight:700; }
.exp-card.done{ border-color:rgba(74,222,128,.4); background:rgba(74,222,128,.07); }

/* ---------- El experimento ---------- */
.exp-shell{ width:min(880px,100%); display:grid; gap:14px; }

.exp-head{
  display:flex; align-items:center; gap:12px;
  background:rgba(255,255,255,.05); border:1px solid var(--line);
  border-radius:14px; padding:10px 14px;
}
.exp-icon{ font-size:26px; }
.exp-titles b{ display:block; font-size:16px; font-family:var(--font-title); }
.exp-titles small{ display:block; font-size:12px; color:var(--text-dim); }

/* Panel del profesor: oculto salvo con el modo activo */
.teacher-panel{ display:none; }
body.teacher-on .teacher-panel{
  display:block;
  background:rgba(167,139,250,.1); border:1px solid rgba(167,139,250,.35);
  border-radius:16px; padding:16px 18px; text-align:left;
}
.teacher-panel h3{ font-family:var(--font-title); font-size:15px; margin:0 0 12px; color:var(--violet); }
.t-row{ margin-bottom:12px; }
.t-row b{ display:block; font-size:13px; color:var(--violet); margin-bottom:3px; }
.t-row p{ margin:0; font-size:13.5px; line-height:1.6; color:#d9d2f0; }

.panel{
  background:linear-gradient(180deg, rgba(27,39,64,.9), rgba(15,23,42,.94));
  border:1px solid var(--line); border-radius:var(--radius);
  box-shadow:var(--shadow); padding:clamp(18px,3.4vw,30px);
  animation:in .35s ease both;
}

.stage-tag{
  font-size:11.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--accent); margin:0 0 10px; font-weight:700;
}
.stage-q{ font-family:var(--font-title); font-size:clamp(18px,4.2vw,27px); line-height:1.32; margin:0 0 18px; }

/* ---------- Opciones ---------- */
.options{ display:grid; gap:10px; }
.option{
  display:flex; align-items:center; gap:12px; text-align:left; width:100%;
  font-family:var(--font-body); font-weight:500; font-size:clamp(14.5px,3.2vw,17px);
  color:var(--text); background:rgba(255,255,255,.05);
  border:2px solid var(--line); border-radius:13px; padding:13px 15px; cursor:pointer;
  transition:transform .12s, border-color .2s, background .2s;
}
.option:hover:not(:disabled){ transform:translateX(3px); border-color:var(--accent); background:rgba(255,255,255,.09); }
.option:focus-visible{ outline:3px solid var(--amber); outline-offset:2px; }
.option:disabled{ cursor:default; }
.option .letter{
  flex:0 0 auto; width:30px; height:30px; border-radius:9px;
  display:grid; place-items:center; background:rgba(0,0,0,.3);
  color:var(--accent); font-family:var(--font-title); font-size:14px; font-weight:700;
}
.option.correct{ background:rgba(74,222,128,.16); border-color:var(--green); }
.option.correct .letter{ background:var(--green); color:#04240f; }
.option.wrong{ background:rgba(248,113,113,.14); border-color:var(--red); }
.option.wrong .letter{ background:var(--red); color:#2b0606; }
.option.dim{ opacity:.45; }

/* ---------- Feedback ---------- */
.feedback{
  margin-top:16px; padding:14px 16px; border-radius:13px;
  font-size:14.5px; line-height:1.65; text-align:left;
  animation:in .3s ease both;
}
.feedback.ok     { background:rgba(74,222,128,.12); border:1px solid rgba(74,222,128,.35); }
.feedback.bad    { background:rgba(248,113,113,.1); border:1px solid rgba(248,113,113,.3); }
.feedback.neutral{ background:rgba(250,204,21,.1);  border:1px solid rgba(250,204,21,.3); }
.feedback .pts{ color:var(--green); font-weight:700; font-family:var(--font-title); }

/* ---------- Simulación ---------- */
.sim-canvas{
  display:grid; place-items:center;
  background:rgba(0,0,0,.22); border:1px solid var(--line);
  border-radius:16px; padding:14px; margin-bottom:14px;
  color:var(--text);
}
.sim-svg{ width:100%; max-width:560px; height:auto; }

.sim-readout{
  background:rgba(34,211,238,.08); border:1px solid rgba(34,211,238,.28);
  border-radius:13px; padding:13px 15px; margin:0 0 16px;
  font-size:14.5px; line-height:1.65; text-align:left; color:#cdeef5;
}

.sim-controls{ display:grid; gap:14px; margin-bottom:14px; }
.control label{ display:block; font-size:13px; color:var(--text-dim); margin-bottom:7px; font-weight:600; }
.control output{ color:var(--accent); font-family:var(--font-title); font-weight:700; }

.control input[type=range]{
  width:100%; height:8px; border-radius:99px; appearance:none;
  background:rgba(255,255,255,.14); cursor:pointer;
}
.control input[type=range]::-webkit-slider-thumb{
  appearance:none; width:22px; height:22px; border-radius:50%;
  background:var(--accent); border:3px solid #0b1220; cursor:pointer;
}
.control input[type=range]::-moz-range-thumb{
  width:22px; height:22px; border-radius:50%;
  background:var(--accent); border:3px solid #0b1220; cursor:pointer;
}
.control input[type=range]:focus-visible{ outline:3px solid var(--amber); outline-offset:3px; }

.control select{
  width:100%; font-family:var(--font-body); font-size:15px;
  background:var(--panel-2); color:var(--text);
  border:2px solid var(--line); border-radius:11px; padding:10px 12px; cursor:pointer;
}

.toggle{
  width:100%; display:flex; align-items:center; gap:12px;
  font-family:var(--font-body); font-size:14.5px; font-weight:600; color:var(--text);
  background:rgba(255,255,255,.05); border:2px solid var(--line);
  border-radius:13px; padding:12px 15px; cursor:pointer;
  transition:border-color .2s, background .2s;
}
.toggle i{
  margin-left:auto; flex:0 0 auto; width:46px; height:26px; border-radius:99px;
  background:rgba(255,255,255,.16); position:relative; transition:background .2s;
}
.toggle i::after{
  content:""; position:absolute; top:3px; left:3px; width:20px; height:20px;
  border-radius:50%; background:var(--text-dim); transition:transform .2s, background .2s;
}
.toggle[aria-pressed="true"]{ border-color:var(--green); background:rgba(74,222,128,.1); }
.toggle[aria-pressed="true"] i{ background:rgba(74,222,128,.35); }
.toggle[aria-pressed="true"] i::after{ transform:translateX(20px); background:var(--green); }
.toggle:focus-visible{ outline:3px solid var(--amber); outline-offset:2px; }

.btn-group{ display:flex; flex-wrap:wrap; gap:8px; }
.chip{
  font-family:var(--font-body); font-size:13.5px; font-weight:600;
  background:rgba(255,255,255,.06); color:var(--text-dim);
  border:2px solid var(--line); border-radius:11px; padding:9px 14px; cursor:pointer;
  transition:border-color .2s, color .2s, background .2s;
}
.chip:hover{ border-color:var(--accent); color:var(--text); }
.chip:focus-visible{ outline:3px solid var(--amber); outline-offset:2px; }
.chip.is-on{ background:var(--accent); color:#03212a; border-color:var(--accent); }

.control-action{ display:flex; }
.action{ width:100%; }

.sim-hint{ font-size:12.5px; color:var(--text-dim); text-align:center; margin:0 0 4px; }

.explain-text{ font-size:15.5px; line-height:1.75; color:#d5e0f2; margin:0; text-align:left; }

/* ---------- Experimento completado ---------- */
.done-panel{ text-align:center; }
.done-title{ font-family:var(--font-title); font-size:clamp(21px,5vw,30px); margin:0 0 6px; color:var(--green); }
.done-sub{ font-size:16px; margin:0 0 14px; color:var(--text-dim); }
.done-points{ font-family:var(--font-title); font-size:clamp(30px,8vw,48px); margin:0; color:var(--amber); }
.done-detail{ font-size:13.5px; color:var(--text-dim); margin:6px 0 18px; }
.done-badges{ display:grid; gap:10px; margin-bottom:18px; }
.badge-new{
  display:flex; gap:12px; align-items:center; text-align:left;
  background:rgba(250,204,21,.12); border:2px solid rgba(250,204,21,.4);
  border-radius:14px; padding:13px 16px;
  animation:pop .6s cubic-bezier(.3,1.6,.5,1) both;
}
@keyframes pop{ 0%{ transform:scale(.6); opacity:0;} 100%{ transform:none; opacity:1;} }
.badge-new .bi{ font-size:32px; }
.done-actions{ display:grid; gap:10px; justify-items:center; }
@media (min-width:520px){ .done-actions{ grid-auto-flow:column; justify-content:center; align-items:center; } }
.done-actions .btn-xl{ width:auto; margin-top:0; }

/* ---------- Resultados ---------- */
.stats{ display:grid; grid-template-columns:repeat(2,1fr); gap:11px; margin-bottom:10px; }
@media (min-width:640px){ .stats{ grid-template-columns:repeat(4,1fr); } }
.stat{ background:rgba(255,255,255,.05); border:1px solid var(--line); border-radius:14px; padding:14px 8px; }
.stat-num{ display:block; font-family:var(--font-title); font-size:clamp(20px,5.4vw,28px); color:var(--cyan); }
.stat-lbl{ display:block; font-size:11.5px; color:var(--text-dim); margin-top:5px; }

.badge-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:10px; }
@media (min-width:720px){ .badge-grid{ grid-template-columns:repeat(3,1fr); } }
.badge{
  background:rgba(255,255,255,.04); border:2px solid var(--line);
  border-radius:14px; padding:14px 10px; display:grid; gap:4px; justify-items:center;
  opacity:.55;
}
.badge.got{ opacity:1; border-color:rgba(250,204,21,.45); background:rgba(250,204,21,.09); }
.badge .bi{ font-size:28px; }
.badge b{ font-size:13.5px; }
.badge small{ font-size:11.5px; color:var(--text-dim); line-height:1.4; }

.res-list{ list-style:none; margin:0; padding:0; display:grid; gap:8px; text-align:left; }
.res-list li{
  display:flex; gap:11px; align-items:center;
  background:rgba(255,255,255,.04); border:1px solid var(--line);
  border-radius:12px; padding:11px 13px; font-size:14px;
}
.res-list li span:first-child{ font-size:22px; }
.res-list .rv b{ display:block; }
.res-list .rv small{ display:block; font-size:12px; color:var(--text-dim); margin-top:2px; }
.res-list .empty{ justify-content:center; color:var(--text-dim); font-size:13.5px; }

/* ---------- Confeti ---------- */
.confetti{
  position:fixed; top:-16px; width:9px; height:15px; z-index:40;
  pointer-events:none; border-radius:2px;
  animation:fall linear forwards;
}
@keyframes fall{ to{ transform:translateY(112vh) rotate(700deg); opacity:0; } }

/* ---------- Accesibilidad ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}

/* ---------- Móvil ---------- */
@media (max-width:560px){
  .topbar{ gap:8px; }
  .top-stats{ width:100%; margin-left:0; order:3; justify-content:space-between; }
  .top-actions{ margin-left:auto; }
  .tool{ font-size:12px; padding:7px 10px; }
  .cat-grid{ grid-template-columns:repeat(2,1fr); }
  .badge-grid{ grid-template-columns:repeat(2,1fr); }
}