:root{--bg:#0e1116;--panel:#161b22;--line:#2a313c;--txt:#e6edf3;--dim:#8b98a5;--accent:#37c2c9;--accent2:#4aa3ff;--ok:#2ea043;--bad:#e5534b}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:system-ui,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--txt);min-height:100vh}
a{cursor:pointer;color:var(--accent)}
/* ---- modal propio (sustituye a prompt()/confirm() nativos: en algunos
   navegadores embebidos -tablets, kioscos- esos dialogos lanzan un error
   en vez de simplemente bloquear, y rompen el flujo a medias) ---- */
.modalov{position:fixed;inset:0;background:rgba(5,7,10,.72);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}
.modalbox{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px}
.modalbox h4{margin:0 0 12px;font-size:15px}
.modalbox input,.modalbox textarea{width:100%;background:#0c1017;border:1px solid var(--line);border-radius:9px;color:var(--txt);padding:10px 12px;font-size:14px;font-family:inherit;margin-bottom:4px}
.modalbtns{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}
/* ---- login ---- */
.auth{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:radial-gradient(circle at 50% 0%,#132022,#0e1116)}
.authbox{width:100%;max-width:400px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:26px}
.authbox h1{font-size:20px;margin:0 0 2px}.authbox h1 small{color:var(--accent)}
.authbox p.sub{color:var(--dim);margin:0 0 18px;font-size:13px}
.field{margin-bottom:12px}.field label{display:block;font-size:12px;color:var(--dim);margin-bottom:4px}
.field input,.field select,.field textarea{width:100%;background:#0c1017;border:1px solid var(--line);border-radius:10px;padding:11px 13px;color:var(--txt);font-size:15px;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.btn{background:var(--accent);color:#04211f;border:0;border-radius:10px;padding:12px;font-size:16px;font-weight:600;cursor:pointer;width:100%}
.btn.ghost{background:#20293a;color:var(--txt);border:1px solid var(--line)}
.btn.bad{background:#3a2020;color:#ffb3ad;border:1px solid var(--bad)}
.btn.sm{width:auto;padding:8px 16px;font-size:14px}
.switch{text-align:center;margin-top:14px;color:var(--dim);font-size:13px}
.err{background:#2b1615;border:1px solid var(--bad);color:#ffb3ad;border-radius:8px;padding:9px 12px;font-size:13px;margin-bottom:12px;display:none}
.err.on{display:block}
.rolehint{font-size:11px;color:var(--dim);margin-top:2px}
.roletabs{display:flex;gap:6px;margin-bottom:16px}
.roletabs button{flex:1;background:#0c1017;border:1px solid var(--line);color:var(--dim);border-radius:8px;padding:8px;font-size:13px;cursor:pointer}
.roletabs button.on{border-color:var(--accent);color:var(--txt)}
/* ---- app shell ---- */
header{background:var(--panel);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:4px;padding:0 16px;flex-wrap:wrap;position:sticky;top:0;z-index:5}
header .brand{font-weight:700;font-size:16px;padding:14px 12px 14px 0}.brand small{color:var(--accent)}
.tab{background:transparent;border:0;color:var(--dim);padding:16px 14px;cursor:pointer;font-size:14px;border-bottom:2px solid transparent}
.tab:hover{color:var(--txt)}.tab.on{color:var(--txt);border-bottom-color:var(--accent)}
.spacer{flex:1}.who{color:var(--dim);font-size:13px;margin-right:10px}
.view{max-width:1200px;margin:0 auto;padding:20px;width:100%;display:none}.view.on{display:block}
h2{font-size:20px;margin:6px 0 16px}h3{font-size:14px;color:var(--dim);text-transform:uppercase;letter-spacing:.4px}
.crumb{color:var(--dim);font-size:13px;margin-bottom:6px}
.crumb a{color:var(--dim);text-decoration:underline}
.demobar{background:#123430;border-bottom:1px solid #1d6b5c;color:#6fe0c6;font-size:12px;text-align:center;padding:6px 10px;letter-spacing:.3px}
/* ---- catalogo de articulaciones ---- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px;margin-top:10px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;cursor:pointer;color:var(--txt);text-align:left;display:flex;flex-direction:column;gap:6px}
.card:hover{border-color:var(--accent)}
.card .rn{font-weight:700;font-size:16px}
.card .meta{color:var(--dim);font-size:12px}
.card .cin{color:var(--dim);font-size:12px;line-height:1.4}
.card.locked{opacity:.4;cursor:not-allowed;border-style:dashed}
.card.study{gap:8px}
.card.study .thumb,.card.art .thumb{width:100%;height:120px;object-fit:cover;background:#000;border-radius:8px}
.card.art{gap:8px}
.pill{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:600}
.pill.g{background:#132b1d;color:#7ee2a0}.pill.y{background:#2c2612;color:#e6c34a}.pill.r{background:#2b1615;color:#ffb3ad}.pill.n{background:#20293a;color:var(--dim)}
/* ---- visor DDR / cine-loop ---- */
.viewer{display:flex;gap:16px;flex-wrap:wrap}
.stage{flex:1;min-width:320px;background:#05070a;border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.canvaswrap{position:relative;flex:1;height:65vh;min-height:380px;max-height:680px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#000;cursor:grab}
.canvaswrap.panning{cursor:grabbing}
.canvaswrap canvas{position:absolute;left:50%;top:50%;transform-origin:center center}
.canvaswrap video{max-width:100%;max-height:100%}
.stagebadge{position:absolute;top:8px;left:8px;background:rgba(0,0,0,.55);color:#9fe;padding:3px 9px;border-radius:6px;font-size:11px;z-index:3}
.toolbar{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--panel);border-top:1px solid var(--line);flex-wrap:wrap}
.toolbar button{background:#20293a;color:var(--txt);border:1px solid var(--line);border-radius:8px;padding:7px 12px;cursor:pointer;font-size:13px}
.toolbar button.on{border-color:var(--accent);color:var(--accent)}
.toolbar .pos{color:var(--dim);font-size:12px;min-width:80px;text-align:center}
.toolbar label{color:var(--dim);font-size:12px;display:flex;align-items:center;gap:6px}
input[type=range]{accent-color:var(--accent)}
.timeline{position:relative;padding:14px 12px 10px;background:var(--panel);border-top:1px solid var(--line)}
.timeline input[type=range]{width:100%}
.timeline .marks{position:relative;height:10px;margin-top:2px}
.tmark{position:absolute;top:0;width:9px;height:9px;border-radius:50%;background:var(--accent2);transform:translateX(-50%);cursor:pointer;border:1px solid #04121f}
.tmark.medicion{background:#e6c34a}
.tmark.area{background:#e6874a}
.tmark.flecha{background:#37c2c9}
.rombox{padding:12px;background:var(--panel);border-top:1px solid var(--line)}
.rombox h4{margin:0 0 4px;font-size:11px;color:var(--dim);text-transform:uppercase;letter-spacing:.4px}
.foro-item{padding:8px 0;border-bottom:1px solid var(--line);font-size:13px}
.foro-item:last-child{border-bottom:0}
.foro-item b{color:var(--accent2)}
.foro-item a{font-size:12px}
.side{flex:0 0 340px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px 0;display:flex;flex-direction:column;max-height:78vh}
.side h3{padding:0 14px 8px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}
.anotlist{list-style:none;margin:0;padding:6px 0;overflow:auto;flex:1}
.anotlist li{padding:9px 14px;border-bottom:1px solid #1b212b;font-size:13px;cursor:pointer}
.anotlist li:hover{background:#1b2330}
.anotlist .fr{color:var(--accent);font-weight:700;font-size:11px}
.anotlist .tag{display:inline-block;background:#20293a;border-radius:6px;padding:1px 6px;font-size:10px;color:var(--dim);margin-left:6px}
.anotlist .empty{color:var(--dim);text-align:center;padding:20px}
.anotform{padding:10px 14px;border-top:1px solid var(--line)}
.anotform textarea{width:100%;min-height:56px;background:#0c1017;border:1px solid var(--line);border-radius:8px;color:var(--txt);padding:8px;margin:6px 0;font-family:inherit}
.anotform select,.anotform input{width:100%;background:#0c1017;border:1px solid var(--line);border-radius:8px;color:var(--txt);padding:7px;margin-bottom:6px}
.measurebox{background:#1b2330;border:1px solid var(--line);border-radius:8px;padding:8px;font-size:12px;color:var(--dim);margin-bottom:6px}
/* ---- subir estudio ---- */
.uploadbox{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;max-width:520px}
.progress{height:6px;background:#0c1017;border-radius:4px;overflow:hidden;margin-top:10px}.progress>div{height:100%;background:var(--accent);width:0%;transition:.3s}
.grid-mod{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:8px;margin-top:10px}
.chk-mod{display:flex;align-items:center;gap:8px;background:#0f141c;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer;font-size:13px}
.chk-mod.on{border-color:var(--accent)}
.chk-mod input{width:auto}
/* ---- quiz ---- */
.qhead{color:var(--dim);font-size:13px;margin-bottom:10px}
.qcard{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px;max-width:760px;margin:0 auto}
.bar{height:5px;background:#0c1017;border-radius:4px;overflow:hidden;margin-bottom:14px}.bar>div{height:100%;background:var(--accent)}
.qtext{font-size:19px;line-height:1.4;margin:0 0 16px}
.opts{display:grid;gap:10px}
.qclicwrap{margin-bottom:16px;background:#000;border-radius:10px;overflow:hidden}
.opt{text-align:left;background:#1b2330;color:var(--txt);border:1.5px solid var(--line);border-radius:10px;padding:13px 16px;font-size:16px;cursor:pointer}
.opt:hover:not(:disabled){border-color:var(--accent)}.opt.ok{border-color:var(--ok);background:#132b1d}.opt.bad{border-color:var(--bad);background:#2b1615}
.fb{display:none;margin-top:16px;padding:13px 16px;border-radius:10px;font-size:15px}
.fb.ok{background:#132b1d;border:1px solid var(--ok)}.fb.bad{background:#2b1615;border:1px solid var(--bad)}
.fb b{display:block;margin-bottom:4px}
.qact{margin-top:16px;text-align:right}
.center{text-align:center}.big{font-size:40px;font-weight:800;margin:10px 0}.dim{color:var(--dim)}
/* ---- tablas ---- */
table{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);font-size:14px}
th{color:var(--dim);font-weight:600;font-size:12px;text-transform:uppercase}
tr:hover td{background:#1b2330;cursor:pointer}
.note-doc{background:#132033;border:1px solid #24405f;border-radius:10px;padding:12px 16px;margin-bottom:16px;font-size:14px;color:#bcd3ee}
/* ---- comercial ---- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.compare .pane{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px;text-align:center}
.compare .pane img,.compare .pane video{width:100%;border-radius:10px;background:#000}
.compare .pane h4{margin:8px 0 4px;font-size:13px;color:var(--dim);text-transform:uppercase}
.marca-comercial{position:fixed;left:12px;bottom:10px;color:#345;font-size:11px;z-index:2;pointer-events:none}
/* ---- comparar dos cine-loops sincronizados ---- */
.cmp-pick{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cmpgrid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cmppane{background:#05070a;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.cmppane h4{margin:0;padding:10px 12px;font-size:13px;color:var(--txt);border-bottom:1px solid var(--line);background:var(--panel);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cmpstage{position:relative;min-height:220px;display:flex;align-items:center;justify-content:center;background:#000;flex:1}
.cmpstage canvas{width:100%;height:auto;max-height:70vh}
.cmppos{padding:6px 12px;color:var(--dim);font-size:12px;text-align:center;background:var(--panel);border-top:1px solid var(--line)}
.cmpcontrols{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px;margin-top:14px}
.cmpcontrols button{background:#20293a;color:var(--txt);border:1px solid var(--line);border-radius:8px;padding:8px 14px;cursor:pointer;font-size:13px}
.cmpcontrols select{background:#0c1017;border:1px solid var(--line);border-radius:8px;color:var(--txt);padding:6px 8px}
.cmpcontrols input[type=range]{flex:1;min-width:160px}
footer{padding:10px 16px;color:var(--dim);font-size:11px;text-align:center;border-top:1px solid var(--line)}
/* ---- guia de estudio imprimible ---- */
.guide{max-width:900px;margin:0 auto}
.guide-head{margin-bottom:16px}
.guide-head a{cursor:pointer}
.guide-frame{display:flex;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;margin:14px 0;page-break-inside:avoid}
.guide-frame img{width:260px;height:auto;border-radius:8px;background:#000;flex:0 0 260px}
.guide-notes{flex:1;min-width:0}
.guide-notes h4{margin:0 0 8px;font-size:12px;color:var(--dim);text-transform:uppercase;letter-spacing:.4px}
.guide-note{margin-bottom:10px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.guide-note:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.guide-note b{color:var(--accent)}
.guide-note p{margin:4px 0 0;color:var(--dim);font-size:14px}
@media print{header,.toolbar,.timeline,.side,footer,.noprint{display:none!important}.view{max-width:100%}.guide-frame{border:1px solid #ccc}}
@media(max-width:900px){.side{flex:1 1 100%;max-height:none}.compare{grid-template-columns:1fr}.cmpgrid,.cmp-pick{grid-template-columns:1fr}.guide-frame{flex-direction:column}.guide-frame img{width:100%;flex:none}}