/* StomaLab — tema oscuro al estilo VS Code, coherente con los tutores EduCode */
:root{
  --bg:#1e1e1e; --panel:#252526; --panel2:#2d2d30; --bar:#333333; --line:#3c3c3c;
  --text:#d4d4d4; --muted:#9d9d9d; --accent:#007acc; --accent2:#3794ff;
  --ok:#4ec9b0; --ko:#f14c4c; --warn:#dcdcaa; --pink:#c586c0; --orange:#ce9178;
  --paper:#ffffff; --radius:8px;
  --mono: Consolas, "Cascadia Code", "Fira Code", monospace;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 "Segoe UI",system-ui,-apple-system,Roboto,sans-serif}
a{color:var(--accent2);text-decoration:none} a:hover{text-decoration:underline}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{font-weight:600;margin:.2em 0 .5em} h1{font-size:1.6rem} h2{font-size:1.25rem} h3{font-size:1.05rem}
.hidden{display:none!important}
.muted{color:var(--muted)} .ok{color:var(--ok)} .ko{color:var(--ko)} .warn{color:var(--warn)}
.mono{font-family:var(--mono)}

/* barra superior */
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:14px;padding:0 16px;height:48px;background:var(--bar);border-bottom:1px solid #000}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;letter-spacing:.3px;color:#fff;cursor:pointer}
.brand .logo{width:26px;height:26px}
.brand small{font-weight:400;color:var(--muted)}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{padding:6px 10px;border-radius:6px;color:var(--text)} .nav a.on,.nav a:hover{background:#ffffff14;text-decoration:none}
.spacer{flex:1}
.who{color:var(--muted);font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:40vw}
.wrap{max-width:1180px;margin:0 auto;padding:20px 16px 60px}

/* botones y formularios */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--panel2);padding:7px 14px;border-radius:6px;cursor:pointer;color:var(--text)}
.btn:hover{border-color:#5a5a5a;background:#37373d}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff} .btn.primary:hover{background:#1287d8}
.btn.ok{background:#0e6b5b;border-color:#0e6b5b;color:#fff}
.btn.danger{background:#5a1d1d;border-color:#7a2b2b;color:#ffd5d5}
.btn.sm{padding:3px 9px;font-size:.85rem}
.btn:disabled{opacity:.45;cursor:not-allowed}
input[type=text],input[type=password],input[type=number],select,textarea{background:#3c3c3c;border:1px solid #4a4a4a;border-radius:5px;padding:7px 9px;outline:none;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
label{display:block;font-size:.88rem;color:var(--muted);margin:10px 0 4px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.pill{display:inline-block;padding:1px 8px;border-radius:999px;font-size:.78rem;border:1px solid var(--line);background:#ffffff0d}
.pill.ok{border-color:#2a6b5f;color:var(--ok)} .pill.ko{border-color:#7a2b2b;color:#ff8f8f} .pill.warn{border-color:#6b6533;color:var(--warn)} .pill.blue{border-color:#1d5c8f;color:var(--accent2)}
.err{background:#5a1d1d;color:#ffd5d5;padding:8px 12px;border-radius:6px;margin:10px 0}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);background:#094771;color:#fff;padding:10px 18px;border-radius:8px;z-index:100;box-shadow:0 6px 24px #0008}

/* login */
.login{max-width:420px;margin:7vh auto;padding:0 16px}
.login .hero{text-align:center;margin-bottom:18px}
.login .hero .logo{width:64px;height:64px}
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);margin-bottom:14px;overflow-x:auto}
.tabs button{background:none;border:none;border-bottom:2px solid transparent;padding:8px 14px;cursor:pointer;color:var(--muted);white-space:nowrap}
.tabs button.on{color:#fff;border-bottom-color:var(--accent)}

/* portada de capítulos */
.hero-cuaderno{display:flex;gap:18px;align-items:center;margin-bottom:18px}
.hero-cuaderno h1{margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.chap{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:pointer;display:flex;flex-direction:column;transition:border-color .15s}
.chap:hover{border-color:var(--accent)}
.chap .th{height:120px;background:#fff center/cover no-repeat;border-bottom:1px solid var(--line)}
.chap .body{padding:10px 12px;flex:1;display:flex;flex-direction:column;gap:4px}
.chap .n{font-family:var(--mono);color:var(--accent2);font-size:.8rem}
.chap .nm{font-weight:600;line-height:1.25}
.chap .meta{margin-top:auto;display:flex;gap:6px;flex-wrap:wrap}
.chap.locked{cursor:not-allowed;opacity:.45}
.chap.locked .th{filter:grayscale(1)}
.bar{height:6px;background:#3c3c3c;border-radius:3px;overflow:hidden} .bar i{display:block;height:100%;background:var(--ok)}

/* visor de diapositivas */
.viewer{display:grid;grid-template-columns:1fr;gap:10px}
.slide{background:var(--paper);border-radius:6px;display:flex;justify-content:center;padding:6px;cursor:zoom-in}
.slide img{max-width:100%;max-height:78vh}
.vnav{display:flex;gap:10px;align-items:center;justify-content:center}
.thumbs{display:flex;gap:6px;overflow-x:auto;padding-bottom:6px}
.thumbs img{height:74px;border:2px solid transparent;border-radius:3px;background:#fff;cursor:pointer}
.thumbs img.on{border-color:var(--accent)}
.lb{position:fixed;inset:0;background:#000d;z-index:60;display:flex;flex-direction:column}
.lb .lbbar{display:flex;gap:8px;padding:8px;align-items:center}
.lb .stage{flex:1;overflow:auto;display:flex;justify-content:center;align-items:flex-start}
.lb .stage img{background:#fff;transform-origin:top center}

/* ejercicio de lámina */
.lam{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,1fr);gap:16px;align-items:start}
@media (max-width:860px){.lam{grid-template-columns:1fr}}
.plate{position:relative;background:#fff;border-radius:6px;overflow:hidden;user-select:none;touch-action:manipulation}
.plate img{display:block;width:100%;height:auto}
.mk{position:absolute;transform:translate(-50%,-50%);min-width:24px;height:24px;padding:0 5px;border-radius:12px;background:#007acc;color:#fff;font:700 12px/24px var(--mono);text-align:center;box-shadow:0 0 0 2px #fff,0 2px 6px #0006;cursor:pointer;z-index:2}
.mk.hl{background:#c586c0;transform:translate(-50%,-50%) scale(1.25)}
.mk.good{background:#12866f} .mk.bad{background:#c42b2b}
.mk.filled:not(.good):not(.bad){background:#3a3d41;box-shadow:0 0 0 2px #007acc,0 2px 6px #0006}
.cover{position:absolute;background:#fff;border:1.5px dashed #007acc;border-radius:3px;z-index:1}
.cover.good{border-color:#12866f;border-style:solid} .cover.bad{border-color:#c42b2b;border-style:solid}
.cover .ans{font:600 10.5px/1.15 "Segoe UI",sans-serif;color:#111;padding:1px 3px;display:block;overflow:hidden}
.answers{display:flex;flex-direction:column;gap:6px;max-height:78vh;overflow:auto;padding-right:4px}
.ans-row{display:grid;grid-template-columns:32px 1fr;gap:8px;align-items:center;padding:4px;border-radius:6px}
.ans-row.hl{background:#ffffff10}
.ans-row .num{font:700 12px/24px var(--mono);background:#007acc;color:#fff;border-radius:12px;text-align:center;height:24px}
.ans-row.good .num{background:#12866f} .ans-row.bad .num{background:#c42b2b}
.ans-row .fix{grid-column:2;font-size:.85rem;color:var(--ok)}
.pin{position:absolute;transform:translate(-50%,-100%);font:700 12px var(--mono);color:#fff;background:#c586c0;border-radius:10px 10px 10px 0;padding:2px 6px;z-index:3;pointer-events:none}
.pin.good{background:#12866f} .pin.bad{background:#c42b2b}
.zone{position:absolute;border-radius:50%;border:2px dashed #12866f;background:#4ec9b022;transform:translate(-50%,-50%);z-index:1;pointer-events:none}
.zlist button{display:block;width:100%;text-align:left;margin-bottom:6px}
.zlist button.on{border-color:var(--pink);background:#c586c022}
.score{font-size:2rem;font-weight:700;font-family:var(--mono)}
.score.good{color:var(--ok)} .score.mid{color:var(--warn)} .score.low{color:var(--ko)}
.zoomctl{display:flex;gap:6px;align-items:center;margin-bottom:8px}

/* preguntas */
.q{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:6px;padding:14px 16px;margin-bottom:12px}
.q.good{border-left-color:var(--ok)} .q.bad{border-left-color:var(--ko)} .q.part{border-left-color:var(--warn)}
.q .qn{font-family:var(--mono);color:var(--muted);font-size:.8rem}
.q .en{font-weight:600;margin:4px 0 10px}
.opt{display:flex;gap:10px;align-items:flex-start;padding:7px 10px;border:1px solid var(--line);border-radius:6px;margin-bottom:6px;cursor:pointer}
.opt:hover{background:#ffffff08}
.opt input{margin-top:4px}
.opt.right{border-color:#2a6b5f;background:#4ec9b014} .opt.wrong{border-color:#7a2b2b;background:#f14c4c14}
.match{display:grid;grid-template-columns:1fr 1fr;gap:8px;align-items:center}
@media (max-width:600px){.match{grid-template-columns:1fr}}
.match .l{padding:6px 10px;background:#ffffff08;border-radius:6px}
.expl{margin-top:10px;padding:8px 12px;background:#094771;border-radius:6px;font-size:.92rem}
.expl a{color:#9cdcfe}
.sticky-foot{position:sticky;bottom:0;background:linear-gradient(transparent,var(--bg) 35%);padding:18px 0 8px;display:flex;gap:10px;align-items:center;justify-content:flex-end}
.timer{font:700 1.1rem var(--mono);padding:4px 10px;border-radius:6px;background:#3c3c3c}
.timer.low{background:#5a1d1d;color:#ffd5d5}

/* tablas */
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:7px 9px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{color:var(--muted);font-weight:600;background:var(--bg)}
tr:hover td{background:#ffffff06}
.tblwrap{overflow-x:auto}
.n10{font-family:var(--mono);font-weight:700}
.chips{display:flex;gap:5px;flex-wrap:wrap}
.chipcap{font:12px var(--mono);padding:3px 7px;border-radius:5px;border:1px solid var(--line);cursor:pointer;user-select:none}
.chipcap.on{background:#0e6b5b;border-color:#0e6b5b;color:#fff}
.modal{position:fixed;inset:0;background:#000a;z-index:50;display:flex;align-items:flex-start;justify-content:center;padding:4vh 12px;overflow:auto}
.modal .box{background:var(--panel);border:1px solid var(--line);border-radius:10px;max-width:980px;width:100%;padding:18px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:14px} @media (max-width:760px){.split{grid-template-columns:1fr}}
.kpi{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-bottom:14px}
.kpi .card{padding:10px 12px} .kpi b{display:block;font-size:1.4rem;font-family:var(--mono)}

/* móvil */
@media (max-width:760px){
  .topbar{height:auto;flex-wrap:wrap;padding:8px 12px;gap:8px}
  .brand small,.who{display:none}
  .nav{order:3;width:100%;flex-wrap:nowrap;overflow-x:auto}
  .nav a{white-space:nowrap}
  .wrap{padding:14px 12px 60px}
  .hero-cuaderno h1{font-size:1.3rem}
  .sticky-foot{flex-wrap:wrap}
  .kpi{grid-template-columns:repeat(2,1fr)}
}