:root{--pax:#e0a02c}
@media(prefers-color-scheme:dark){
  :root{--bg:#0b1a24;--panel:#122836;--ink:#e6f0f5;--mute:#8fa8b8;--line:#223a4a;--dual:#5aa4e6;--pax:#f2bd55;--ok:#46c9a1;--bad:#ff8a80}
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 15px/1.5 system-ui,sans-serif;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}
h1,h2,h3,.big{font-family:system-ui,sans-serif;letter-spacing:-.02em;line-height:1.1;margin:0}
h1{font-size:clamp(24px,5vw,36px)}
h2{font-size:17px;font-weight:700}
h3{font-size:20px;font-weight:700}
p{margin:0}
.wrap{max-width:1180px;margin:0 auto;padding:20px 16px}
.muted{color:var(--mute)}
.stack>*+*{margin-top:14px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

/* Cabecera */
.topbar{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.brand{font:700 20px system-ui,sans-serif}
.user{display:flex;align-items:center;gap:10px;min-width:0}
.uname{font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:200px}
.avatar{border-radius:50%;display:grid;place-items:center;font-weight:600;flex:none}

/* Tarjetas y botones */
.card{background:var(--panel);min-width:0}
.btn{border:0;padding:10px 16px;font:600 15px system-ui,sans-serif;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.small{padding:5px 10px;font-size:12.5px}
.btn.block{width:100%}

/* Hero */
.hero{color:#fff;padding:22px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:center}
.hero .btn:hover{background:#f7bb88}
.hero .btn.ghost{background:transparent;color:#fff;border:1px solid #4a6285}
.hero p{color:#b9c6da;margin:10px 0 16px}

/* Formularios */
.tabs{display:flex;border:1px solid var(--line);border-radius:10px;padding:3px;gap:3px;margin-bottom:14px}
.tabs button{flex:1;border:0;background:transparent;color:var(--ink);font:600 14px system-ui,sans-serif;padding:8px 10px;border-radius:7px;cursor:pointer;min-height:36px}
.tabs button[aria-selected="true"]{background:var(--ink);color:var(--bg)}
.field{margin-bottom:12px}
label,.lbl{display:block;font-size:13px;margin-bottom:4px}
input{width:100%;padding:9px 10px;color:var(--ink);font:400 16px system-ui,sans-serif}
.hint{font-size:12.5px;color:var(--mute);margin-top:4px}
.msg{border:1px solid var(--line);padding:9px 12px;font-size:13.5px;margin-bottom:14px}
.msg.err{border-color:var(--bad);color:var(--bad)}
.msg.ok{border-color:var(--ok);color:var(--ok)}
.msg.warn{border-color:var(--pax);color:var(--ink)}
.msg.inline{margin:12px 0 0}
[hidden]{display:none!important}

/* Planes y exámenes */
.plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.exams{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:14px}
.item{display:flex;flex-direction:column;gap:8px}
.item .grow{flex:1}
.price{font:700 22px system-ui,sans-serif;letter-spacing:-.02em}
.tag{display:inline-block;border-radius:99px;padding:2px 10px;font-size:12px;width:fit-content}
.empty{text-align:center;padding:28px 16px}
.empty .btn{margin-top:12px}

/* Preguntas */
.bar{overflow:hidden}
.bar>i{display:block;height:100%}
.qmeta{font-size:12.5px;color:var(--mute);margin:10px 0 8px}
.qtext{white-space:pre-line;margin-bottom:14px}
.opts{display:grid;gap:8px}
.opt{display:flex;gap:10px;align-items:flex-start;width:100%;text-align:left;color:var(--ink);font:400 15px/1.4 system-ui,sans-serif;cursor:pointer}
.opt:disabled{cursor:default}
.opt .lt{flex:none;border-radius:50%;display:grid;place-items:center;font-weight:600;font-size:13px}
.opt[aria-pressed="true"]{border-color:var(--dual)}
.opt.correct{border-color:var(--ok)}
.opt.wrong{border-color:var(--bad)}
.explain{margin-top:14px}
.explain b{display:block;margin-bottom:2px}
.explain p{white-space:pre-line}
.nav{margin-top:14px;justify-content:space-between}
.nav .mid{display:flex;gap:10px;flex-wrap:wrap}
.seg{display:flex;flex-wrap:wrap;border:1px solid var(--line);border-radius:10px;padding:3px;gap:3px;width:fit-content;max-width:100%}
.seg button{border:0;background:transparent;color:var(--ink);font:600 14px system-ui,sans-serif;padding:8px 14px;border-radius:7px;cursor:pointer;min-height:36px}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}

/* Resultado */
.score{color:#fff;padding:22px;display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.score .big{font-size:clamp(54px,12vw,104px);font-variant-numeric:tabular-nums}
.score span{color:#b9c6da}
.review{display:grid;gap:14px}
.review .answer{font-size:14px;margin-top:6px}
.review .answer b{font-weight:600}
a:focus-visible,.btn:focus-visible,input:focus-visible,button:focus-visible{outline:2px solid var(--dual);outline-offset:2px}
@media(max-width:820px){
  .hero{grid-template-columns:minmax(0,1fr)}
  .plans{grid-template-columns:minmax(0,1fr)}
}
@media(max-width:480px){
  .uname{display:none}
  .nav .btn{flex:1}
}

/* Selector de asignaturas */
.subjects{display:flex;flex-wrap:wrap;gap:8px}
.chip{color:var(--ink);font:600 14px system-ui,sans-serif;padding:8px 14px;border-radius:999px;cursor:pointer;min-height:40px}
.num{width:96px;min-height:44px;padding:0 12px;color:var(--ink);font:600 16px system-ui,sans-serif}

/* Reporte de errores */
.report{margin-top:12px;display:grid;gap:8px}
.report textarea{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--ink);font:400 14px system-ui,sans-serif;resize:vertical}
.report-link{border:0;background:none;padding:0;color:var(--mute);font:400 12px system-ui,sans-serif;text-decoration:underline;cursor:pointer;justify-self:start}
.report-link:hover{color:var(--ink)}
.report-ok{font-size:12px;color:var(--mute)}
.report-err{font-size:13px;color:#b3261e}

/* Móvil */
.brand,.topbar .btn{white-space:nowrap}
@media(max-width:480px){
  .wrap{padding:14px 14px}
  .topbar{gap:8px;margin-bottom:14px;flex-wrap:wrap}
  .brand{font-size:17px}
  .user{gap:6px}
  .avatar{width:30px;height:30px}
  .topbar .btn.small{padding:4px 9px;min-height:32px}
  .qtext{font-size:18px}
  .seg button{padding:8px 11px}
}

/* Acceso */
.row-between{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.chk-label{display:flex;align-items:center;gap:8px;margin:0;color:var(--ink);font-size:14px;cursor:pointer}
input.chk{width:18px;height:18px;padding:0}
.link{border:0;background:none;padding:6px 0;color:var(--dual);font:500 14px system-ui,sans-serif;cursor:pointer;text-decoration:underline;min-height:32px}

/* Inicio de visitante */
.landing{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)}
.authcard{color:var(--ink)}
@media(max-width:820px){
  .landing{grid-template-columns:minmax(0,1fr);padding:20px;gap:22px}
  .landing .pitch p{margin:10px 0 0}
}
.userlink{display:flex;align-items:center;gap:10px;min-width:0;background:transparent;border:0;padding:3px 8px 3px 3px;border-radius:99px;cursor:pointer;color:inherit;font:inherit}
.userlink{flex:none}
.avatar{width:34px;height:34px}
.urow{display:flex;gap:14px;align-items:flex-start}
.uinfo{flex:1;min-width:0;display:flex;flex-direction:column;gap:1px;overflow-wrap:anywhere}
.ustats{text-align:right;display:flex;flex-direction:column;flex:none}
.ustats b{font:700 22px system-ui,sans-serif}
.ustats .muted{font-size:12.5px}

/* ===== Tema PilotPrep ===== */
:root{--bg:#F5F6FA;--panel:#FFFFFF;--ink:#0B1220;--mute:#475569;--line:#CBD5E1;--field:#94A3B8;--well:#EAEDF4;--dual:#4338CA;--accent:#4338CA;--on-accent:#FFFFFF;--soft:#E0E7FF;--tagfg:#312E81;--ok:#047857;--bad:#B91C1C;--okbg:#D1FAE5;--okfg:#064E3B;--badbg:#FEF2F2;--shadow:0 1px 2px rgba(11,18,32,.06),0 8px 24px rgba(11,18,32,.06)}
@media(prefers-color-scheme:dark){
  :root{--bg:#0B1220;--panel:#141D30;--ink:#E8ECF4;--mute:#A7B3C6;--line:#2C3A55;--field:#5B6B88;--well:#1B2740;--dual:#A5B4FC;--accent:#4F46E5;--soft:#27306B;--tagfg:#C7D2FE;--ok:#34D399;--bad:#F87171;--okbg:#064E3B;--okfg:#A7F3D0;--badbg:#3A1A22;--shadow:0 1px 2px rgba(0,0,0,.4)}
}
body{font-family:"Plus Jakarta Sans",system-ui,sans-serif}
h1,h2,h3,.big,.brand,.price,.ustats b{font-family:"Plus Jakarta Sans",system-ui,sans-serif;letter-spacing:-.025em}
h1{font-weight:800}
h2,h3{font-weight:700}
.btn,.tabs button,.seg button,.chip,.num,.link,.opt,input,.report textarea,.report-link{font-family:"Plus Jakarta Sans",system-ui,sans-serif}
.card{border:0;border-radius:20px;padding:20px;box-shadow:var(--shadow)}
.btn{background:var(--accent);color:var(--on-accent);border-radius:12px;min-height:48px;font-weight:700}
.btn:hover:not(:disabled){filter:brightness(1.08)}
.btn.ghost{background:var(--panel);color:var(--ink);border:1.5px solid var(--field)}
.btn.small{min-height:40px;border-radius:10px}
.tabs,.seg{background:var(--well);border:0;border-radius:12px;padding:4px}
.tabs button,.seg button{border-radius:9px;min-height:40px;color:var(--ink);font-weight:700}
.tabs button[aria-selected="true"],.seg button[aria-pressed="true"]{background:var(--accent);color:var(--on-accent)}
.chip{border:1.5px solid var(--field);background:var(--panel);font-weight:700}
.chip[aria-pressed="true"]{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.num{border:1.5px solid var(--field);background:var(--panel);border-radius:12px}
input{border:1.5px solid var(--field);background:var(--panel);border-radius:10px;min-height:48px}
input.chk{min-height:0;accent-color:var(--accent)}
label,.lbl{color:var(--mute);font-weight:600}
.tag{background:var(--soft);color:var(--tagfg);font-weight:700}
.tag.ok{background:var(--okbg);color:var(--okfg)}
.tag.warn{background:#FEF3C7;color:#78350F}
.tag.bad{background:var(--badbg);color:var(--bad)}
.avatar{background:var(--ink);color:var(--bg)}
.userlink:hover,.userlink.on{background:var(--well)}
.link,.report-link:hover{color:var(--dual)}
.muted,.qmeta,.hint{color:var(--mute)}
.bar{height:10px;background:var(--well);border-radius:999px}
.bar>i{background:var(--accent);border-radius:999px}
.qtext{font-size:24px;line-height:1.3;letter-spacing:-.015em;font-weight:700}
.opt{border:1.5px solid var(--line);border-radius:14px;padding:14px 16px;min-height:56px;font-size:16px;background:var(--panel)}
.opt:hover:not(:disabled){border-color:var(--accent)}
.opt .lt{width:30px;height:30px;border:1.5px solid var(--field);color:var(--mute)}
.opt[aria-pressed="true"]{border:2px solid var(--accent);background:var(--soft)}
.opt[aria-pressed="true"] .lt{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.opt.correct{border:2px solid var(--ok);background:var(--okbg);color:var(--okfg)}
.opt.wrong{border:2px solid var(--bad);background:var(--badbg)}
.opt.correct .lt{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong .lt{background:var(--bad);border-color:var(--bad);color:#fff}
.explain{border-left:3px solid var(--ok);background:var(--okbg);color:var(--okfg);border-radius:0 12px 12px 0;padding:12px 14px}
.explain.bad{border-left-color:var(--bad);background:var(--badbg);color:var(--ink)}
.msg{border-radius:12px;border-width:1.5px}
.hero{background:#0B1220;border-radius:28px}
.hero .btn{background:var(--accent);color:#fff}
.score{background:#0B1220;border-radius:24px}
.brand{display:flex;align-items:center;gap:10px;background:none;border:0;padding:0;cursor:pointer;color:var(--ink);font-weight:800;font-size:19px;letter-spacing:-.02em}
.brand img{width:36px;height:36px;border-radius:10px;display:block}
.topbar{justify-content:space-between}
.landing{background:#1B3640;padding:40px;gap:40px;align-items:center}
.landing .logo{display:block;width:100%;max-width:520px;height:auto;margin:0 0 8px -24px;-webkit-mask-image:linear-gradient(to right,transparent,#000 12%,#000 88%,transparent),linear-gradient(to bottom,transparent,#000 10%,#000 90%,transparent);-webkit-mask-composite:source-in;mask-image:linear-gradient(to right,transparent,#000 12%,#000 88%,transparent),linear-gradient(to bottom,transparent,#000 10%,#000 90%,transparent);mask-composite:intersect}
.landing h1{color:#fff;font-size:clamp(26px,4vw,38px)}
.landing .pitch p{color:#D3DEE3;font-size:17px;line-height:1.55;margin:12px 0 18px}
.checks{list-style:none;margin:0;padding:0;display:grid;gap:10px;color:#fff;font-weight:600}
.checks li{display:flex;gap:10px;align-items:center}
.checks li::before{content:"";flex:none;width:22px;height:22px;border-radius:50%;background:#F2B75A url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B3640' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center/14px no-repeat}
.authcard{padding:24px;border-radius:20px}
.authcard form .btn{background:var(--accent);color:var(--on-accent)}
.authcard form .btn:hover{background:var(--accent)}
.avatar.online{box-shadow:0 0 0 3px var(--panel),0 0 0 6px #16A34A}
@media(max-width:820px){
  .landing{padding:22px;gap:22px}
  .landing .logo{max-width:340px;margin:0 auto 4px}
  .landing .checks{display:none}
}
@media(max-width:480px){
  .brand span{display:none}
  .landing{padding:16px;border-radius:22px}
  .landing h1{font-size:24px}
}
@media(max-width:820px){
  .landing .pitch h1,.landing .pitch p{display:none}
  .landing .logo{max-width:230px;margin:0 auto}
  .landing{padding:14px;gap:6px}
  .authcard{padding:16px}
  .authcard .field{margin-bottom:8px}
  .authcard input{min-height:44px}
  .authcard .tabs{margin-bottom:10px}
}
.saving{background:var(--okbg);color:var(--okfg);border-radius:10px;padding:8px 12px;font-size:13.5px;font-weight:600;line-height:1.4}

/* Barra de carga */
.loader{max-width:360px;margin:12vh auto;text-align:center}
.loadbar{height:6px;margin-top:12px;background:var(--well);border-radius:999px;overflow:hidden;position:relative}
.loadbar>i{position:absolute;inset:0 auto 0 0;width:40%;background:var(--accent);border-radius:999px;animation:loadmove 1.2s ease-in-out infinite}
@keyframes loadmove{0%{left:-40%}100%{left:100%}}
@media(prefers-reduced-motion:reduce){
  .loadbar>i{animation:none;width:100%;opacity:.5}
}

/* Figuras de apoyo */
.figs{display:grid;gap:10px;margin:0 0 14px}
.fig{display:block;border:1px solid var(--line,#d9dce6);border-radius:12px;background:#fff;overflow:hidden}
.fig img{display:block;width:100%;height:auto}
.item.locked{opacity:.75;border-style:dashed}

/* Resumen y compartir */
.sumlist{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.sumrow{display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;text-align:left;padding:10px 12px;border-radius:12px;background:var(--well);border:1.5px solid transparent;font:inherit;color:var(--ink);cursor:pointer;min-height:48px}
.sumrow:hover{border-color:var(--accent)}
.sumrow .sn{font-weight:800;color:var(--mute)}
.sumrow .sq{font-size:14px;line-height:1.3;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.sumrow .sa{white-space:nowrap;font-size:14px}
.sumrow .mark{margin-left:8px;font-weight:800}
.sumrow.ok .mark{color:var(--ok)}
.sumrow.bad .mark{color:var(--bad)}
.sumrow.ok{background:var(--okbg)}
.sumrow.bad{background:var(--badbg)}
.btn.share{background:linear-gradient(135deg,#4338CA,#C2306E);color:#fff}
.sharewrap{display:flex;justify-content:center}
.sharecv{width:min(100%,380px);height:auto;border-radius:18px;box-shadow:var(--shadow)}
.tag{border:0;font-family:inherit}

/* Panel lateral y encabezado de pregunta */
.qlayout{display:grid;grid-template-columns:minmax(0,1fr);gap:18px;align-items:start}
.qmain>.card{padding:24px}
.sidepanel{display:flex;flex-direction:column;gap:18px}
@media(min-width:1000px){
  .qlayout{grid-template-columns:minmax(0,1fr) 330px}
  .sidepanel{position:sticky;top:16px}
}
.qhead{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 12px}
.pill{display:inline-block;border-radius:999px;padding:4px 12px;font-size:12.5px;font-weight:700;background:var(--well);color:var(--mute)}
.pill.strong{background:var(--soft);color:var(--tagfg)}
.ringrow{display:flex;align-items:center;gap:16px}
.ring{--p:0;flex:none;width:96px;height:96px;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--p)*1%),var(--well) 0);display:grid;place-items:center;transition:background .4s}
.ring>div{width:76px;height:76px;border-radius:50%;background:var(--panel);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1}
.ring b{font-size:20px;font-weight:800;letter-spacing:-.03em}
.ring span{font-size:11px;color:var(--mute);font-weight:600}
.ringtxt{display:flex;flex-direction:column;gap:2px;min-width:0}
.ringtxt b{font-size:17px;font-weight:800}
.ringtxt span{font-size:13px;color:var(--mute)}
.clkrow{margin-top:4px;font-variant-numeric:tabular-nums}
.clkrow b{font-size:13px;color:var(--ink)}
.stiles{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stile{background:var(--well);border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:2px}
.stile b{font-size:22px;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.stile span{font-size:12px;color:var(--mute);font-weight:600}
.stile.ok{background:var(--okbg)}
.stile.ok b{color:var(--okfg)}
.stile.bad{background:var(--badbg)}
.stile.bad b{color:var(--bad)}
.ptitle{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--mute);font-weight:800;margin-bottom:10px}
.qmap{display:flex;flex-wrap:wrap;gap:5px}
.qmap i{width:16px;height:16px;border-radius:5px;background:var(--well);border:1.5px solid var(--line)}
.qmap i.ok{background:var(--ok);border-color:var(--ok)}
.qmap i.mid{background:#F2B75A;border-color:#F2B75A}
.qmap i.bad{background:var(--bad);border-color:var(--bad)}
.qmap i.cur{box-shadow:0 0 0 2px var(--panel),0 0 0 4px var(--accent)}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:12px;font-size:12px;color:var(--mute)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:11px;height:11px;border-radius:4px;background:var(--well);border:1.5px solid var(--line);display:inline-block}
.legend i.ok{background:var(--ok);border-color:var(--ok)}
.legend i.mid{background:#F2B75A;border-color:#F2B75A}
.legend i.bad{background:var(--bad);border-color:var(--bad)}
.legend i.cur{border-color:var(--accent);background:var(--panel);box-shadow:0 0 0 2px var(--soft)}
.tbars{display:flex;flex-direction:column;gap:12px}
.tbars .ptitle{margin-bottom:0}
.tbl{display:flex;justify-content:space-between;gap:8px;font-size:13px;margin-bottom:5px}
.tbl span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}
.tbl b{font-variant-numeric:tabular-nums}
.tbar .bar{height:8px}
.qnav{display:grid;grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:6px}
.qnav button{min-height:40px;border-radius:10px;border:1.5px solid var(--line);background:var(--panel);color:var(--ink);font:700 14px "Plus Jakarta Sans",system-ui,sans-serif;cursor:pointer;font-variant-numeric:tabular-nums}
.qnav button:hover:not(:disabled){border-color:var(--accent)}
.qnav button.done{background:var(--soft);border-color:var(--soft);color:var(--tagfg)}
.qnav button.cur{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.legend i.done{background:var(--soft);border-color:var(--soft)}
.legend i.curfill{background:var(--accent);border-color:var(--accent)}

/* Móvil: barra superior fija, acciones fijas abajo y hoja de preguntas */
.mbar{display:none}
.ring.mini{width:42px;height:42px}
.ring.mini>div{width:32px;height:32px}
@media(max-width:999px){
  .mbar{display:flex;align-items:center;gap:10px;position:sticky;top:6px;z-index:20;background:var(--panel);box-shadow:var(--shadow);border-radius:16px;padding:8px 12px}
  .mtxt{display:flex;flex-direction:column;min-width:0;flex:1;line-height:1.2}
  .mtxt b{font-size:14px;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .mtxt span{font-size:12px;color:var(--mute)}
  .mclk{font-size:12.5px;font-variant-numeric:tabular-nums;white-space:nowrap}
  .mclk b{font-weight:800}
  .mgrid{white-space:nowrap}
  .qmain>.nav{position:sticky;bottom:0;z-index:15;margin:14px -4px 0;padding:10px 4px calc(10px + env(safe-area-inset-bottom));background:linear-gradient(to top,var(--bg) 78%,transparent)}
  .qmain>.nav .mid{flex:1}
  .qmain>.nav .mid .btn{flex:1}
  .qmain>.nav>.btn{flex:1}
}
@media(max-width:480px){
  .mclk{display:none}
}
.sheetwrap{position:fixed;inset:0;z-index:50;display:flex;align-items:flex-end}
.sheetbg{position:absolute;inset:0;background:rgba(11,18,32,.5)}
.sheet{position:relative;width:100%;max-height:78vh;overflow:auto;background:var(--panel);border-radius:24px 24px 0 0;padding:10px 18px calc(18px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:14px;animation:sheetup .22s ease-out}
.grab{width:42px;height:5px;border-radius:99px;background:var(--line);margin:0 auto 2px}
@keyframes sheetup{from{transform:translateY(40px);opacity:0}to{transform:none;opacity:1}}
@media(min-width:1000px){
  .sheetwrap{display:none}
}
@media(prefers-reduced-motion:reduce){
  .sheet{animation:none}
}

/* Móvil: tipografía y espacios más compactos */
@media(max-width:600px){
  body{font-size:14px}
  .wrap{padding:10px 10px}
  .card,.qmain>.card{padding:14px;border-radius:16px}
  h1{font-size:clamp(18px,5vw,22px)}
  .qtext{font-size:17px;line-height:1.32;margin-bottom:12px}
  .qhead{margin:10px 0 8px;gap:6px}
  .pill{font-size:11.5px;padding:3px 10px}
  .opts{gap:7px}
  .opt{padding:10px 12px;min-height:46px;font-size:14.5px;gap:10px;border-radius:12px}
  .opt .lt{width:26px;height:26px;font-size:12.5px}
  .btn{min-height:44px;font-size:14.5px;padding:8px 14px}
  .btn.small{min-height:36px;font-size:12.5px}
  .explain{padding:10px 12px;font-size:14px}
  .stack>*+*{margin-top:10px}
  .ring{width:84px;height:84px}
  .ring>div{width:66px;height:66px}
  .ring b{font-size:17px}
  .ring.mini{width:38px;height:38px}
  .ring.mini>div{width:28px;height:28px}
  .stile{padding:10px}
  .stile b{font-size:19px}
  .mbar{padding:7px 10px;border-radius:14px}
  .qnav{grid-template-columns:repeat(auto-fill,minmax(36px,1fr));gap:5px}
  .qnav button{min-height:36px;font-size:13px}
  .landing h1{font-size:22px}
  .exams h3,.item h3{font-size:17px}
}

/* Menú de usuario y Mi cuenta */
.usermenu{position:relative}
.avatar.img{object-fit:cover;background:var(--well)}
.avatar.big{width:44px;height:44px}
.avatar.lg{width:56px;height:56px;font-size:22px}
.avatar.xl{width:96px;height:96px;font-size:38px}
.caret{font-size:11px;color:var(--mute)}
.menu{position:absolute;right:0;top:calc(100% + 8px);z-index:60;min-width:250px;background:var(--panel);border-radius:16px;box-shadow:0 12px 40px rgba(11,18,32,.22);padding:8px;display:flex;flex-direction:column;gap:2px}
.mhead{display:flex;gap:10px;align-items:center;padding:8px 10px 12px;border-bottom:1px solid var(--line);margin-bottom:6px;min-width:0}
.mhead div{display:flex;flex-direction:column;min-width:0}
.mhead b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mhead>div span{font-size:12.5px;color:var(--mute);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mitem{display:flex;align-items:center;gap:10px;width:100%;text-align:left;border:0;background:transparent;color:var(--ink);font:600 14.5px "Plus Jakarta Sans",system-ui,sans-serif;padding:10px;border-radius:10px;cursor:pointer;min-height:42px}
.mitem:hover{background:var(--well)}
.mitem span{width:22px;text-align:center}
.msep{height:1px;background:var(--line);margin:4px 0}
.ctabs{max-width:100%;overflow-x:auto;flex-wrap:nowrap}
.ctabs button{white-space:nowrap}
.kv{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border-bottom:0}
.kv span{color:var(--mute)}
.kv b{text-align:right;font-weight:700}
.avwrap{flex:none}
.stiles.four{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:700px){
  .stiles.four{grid-template-columns:repeat(2,minmax(0,1fr))}
}
.diag p{font-size:15px;line-height:1.5}
.trow{padding:12px 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.trow:first-of-type{border-top:0}
.thead{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.tname{display:flex;flex-direction:column;min-width:0}
.tname span{font-size:12px;color:var(--mute)}
.lvl{flex:none;border-radius:999px;padding:3px 11px;font-size:12px;font-weight:800;background:var(--well);color:var(--mute)}
.lvl.ok{background:var(--okbg);color:var(--okfg)}
.lvl.mid{background:#FEF3C7;color:#78350F}
.lvl.bad{background:var(--badbg);color:var(--bad)}
.bar.big{height:12px}
.bar.big.ok>i{background:var(--ok)}
.bar.big.mid>i{background:#F2B75A}
.bar.big.bad>i{background:var(--bad)}
.bar.big.low>i{background:var(--field)}
.tmeta{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:12.5px;color:var(--mute);align-items:center}
.tmeta b{color:var(--ink);font-size:14px}
.tmeta .up{color:var(--ok);font-weight:700}
.tmeta .down{color:var(--bad);font-weight:700}
.tmeta .link{min-height:0;padding:0;font-size:12.5px;font-weight:700}
.weak{padding:12px;border-radius:14px;background:var(--well);display:flex;flex-direction:column;gap:8px}
.weak p{font-size:14px;line-height:1.4}
.pill.bad{background:var(--badbg);color:var(--bad)}
.abars{display:flex;gap:10px;align-items:flex-end;height:170px;padding-top:8px}
.abar{flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:4px}
.abar i{display:block;width:100%;max-width:46px;background:var(--accent);border-radius:8px 8px 4px 4px;min-height:6px}
.abar i.low{background:var(--bad)}
.abar .av{font-size:12px;font-weight:800}
.abar .ad{font-size:11px;color:var(--mute);white-space:nowrap}
@media(max-width:600px){
  .menu{position:fixed;right:10px;left:10px;top:56px;min-width:0}
  .uname{display:none}
}

/* Cabina 3D (prototipo privado) */
.cabinaframe{display:block;width:100%;height:calc(100vh - 170px);min-height:480px;border:1px solid var(--line);border-radius:16px;background:#0d1218}
.btn.danger{background:var(--bad);color:#fff;border:0}
.btn.danger:disabled{opacity:.45;cursor:not-allowed}
.legal a{color:inherit;text-decoration:underline}