:root{
  --bg:#04070d;--surface:#0b1426;--surface2:#0f1c34;--naval:#16315f;--line:#22365c;--line2:#2a3f66;
  --cyan:#5eb0ff;--cyan-h:#9cc9ff;--text:#e8eef8;--muted:#8fa3c2;--ok:#4fd1a1;--warn:#f2b84b;--bad:#ff7a7a;
  --r-s:12px;--r-m:18px;--r-l:26px;--ease:cubic-bezier(.22,1,.36,1);
  --f:-apple-system,BlinkMacSystemFont,'SF Pro Text','Inter','Segoe UI',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{color-scheme:dark}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 var(--f);-webkit-font-smoothing:antialiased;min-height:100vh;
  background-image:radial-gradient(900px 500px at 85% -10%,rgba(94,176,255,.13),transparent 60%),radial-gradient(700px 500px at -10% 110%,rgba(22,49,95,.55),transparent 60%);background-attachment:fixed}
a{color:var(--cyan-h);text-decoration:none}a:hover{color:#fff}
h1,h2,h3{letter-spacing:-.02em;line-height:1.15;margin:0}
h1{font-size:clamp(28px,4vw,40px);font-weight:700}h2{font-size:22px;font-weight:650}h3{font-size:17px;font-weight:650}
p{margin:0}.muted{color:var(--muted)}.small{font-size:13.5px}.center{text-align:center}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}

/* topo */
.top{position:sticky;top:0;z-index:30;background:rgba(4,7,13,.72);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:62px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:650;letter-spacing:-.01em}
.brand img{width:26px;height:26px;border-radius:7px}.brand small{color:var(--muted);font-weight:500;margin-left:2px}
.nav{display:flex;gap:4px;margin-left:12px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{padding:8px 13px;border-radius:999px;color:var(--muted);font-size:14.5px;white-space:nowrap;transition:background .2s,color .2s}
.nav a:hover{color:#fff;background:rgba(255,255,255,.05)}.nav a.on{color:#fff;background:rgba(94,176,255,.14)}
.who{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}
.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--naval));display:grid;place-items:center;font-weight:700;color:#04101f;font-size:14px}
main{padding:34px 0 80px}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap}
.head p{margin-top:8px}

/* superficies */
.card{background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.015));border:1px solid var(--line);border-radius:var(--r-m);padding:22px}
.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}.g2{grid-template-columns:1fr}}
@media(max-width:560px){.g3,.g4{grid-template-columns:1fr}.who .nm{display:none}}
.sec{margin-top:40px}.sec>.t{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:999px;border:1px solid var(--line2);background:rgba(255,255,255,.05);color:var(--text);font:600 15px var(--f);cursor:pointer;transition:transform .2s var(--ease),background .2s,border-color .2s}
.btn:hover{background:rgba(255,255,255,.09);color:#fff;transform:translateY(-1px)}
.btn.pri{background:linear-gradient(180deg,#6dbbff,#3d93f2);border-color:transparent;color:#04101f}
.btn.pri:hover{filter:brightness(1.07);color:#04101f}
.btn.sm{padding:7px 14px;font-size:13.5px}.btn.bad{color:var(--bad);border-color:rgba(255,122,122,.35)}
.btn[disabled]{opacity:.45;pointer-events:none}
.pill{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:999px;font-size:12.5px;font-weight:600;border:1px solid var(--line2);color:var(--muted)}
.pill.ok{color:var(--ok);border-color:rgba(79,209,161,.4);background:rgba(79,209,161,.08)}
.pill.live{color:var(--cyan-h);border-color:rgba(94,176,255,.5);background:rgba(94,176,255,.12)}
.pill.warn{color:var(--warn);border-color:rgba(242,184,75,.4)}.pill.bad{color:var(--bad);border-color:rgba(255,122,122,.4)}

/* formularios */
label{display:block;font-size:13.5px;color:var(--muted);margin:0 0 6px;font-weight:500}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=datetime-local],select,textarea,input[type=file]{
  width:100%;background:rgba(0,0,0,.28);border:1px solid var(--line2);border-radius:var(--r-s);padding:12px 14px;color:var(--text);font:15px var(--f)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(94,176,255,.18)}
textarea{min-height:90px;resize:vertical}select option{background:#0b1426}
.row{display:grid;gap:14px}.r2{grid-template-columns:1fr 1fr}@media(max-width:640px){.r2{grid-template-columns:1fr}}
.field{margin-bottom:14px}.chk{display:flex;gap:10px;align-items:center;font-size:14.5px;color:var(--text);margin:8px 0}.chk input{width:18px;height:18px;accent-color:#5eb0ff}
.msg{padding:13px 16px;border-radius:var(--r-s);margin-bottom:20px;font-size:14.5px;border:1px solid}
.msg.ok{color:var(--ok);border-color:rgba(79,209,161,.35);background:rgba(79,209,161,.07)}.msg.er{color:var(--bad);border-color:rgba(255,122,122,.35);background:rgba(255,122,122,.07)}

/* login */
.login{min-height:100vh;display:grid;place-items:center;padding:24px}
.login .box{width:100%;max-width:420px}
.login .logo{display:flex;justify-content:center;margin-bottom:22px}.login .logo img{width:54px;height:54px;border-radius:15px}
.login .card{padding:30px;backdrop-filter:blur(14px)}

/* cursos */
.course{display:flex;flex-direction:column;gap:14px;padding:0;overflow:hidden;transition:transform .3s var(--ease),border-color .3s}
.course:hover{transform:translateY(-3px);border-color:var(--cyan)}
.cover{aspect-ratio:16/9;background:linear-gradient(135deg,#16315f,#0b1426 60%),radial-gradient(circle at 80% 20%,#5eb0ff55,transparent 55%);position:relative;display:grid;place-items:center;overflow:hidden}
.cover::after{content:"";position:absolute;inset:0;background:radial-gradient(500px 220px at 85% 0,rgba(94,176,255,.35),transparent 60%)}
.cover b{position:relative;z-index:1;font-size:36px;opacity:.9;letter-spacing:-.04em}
.course .body{padding:2px 20px 20px;display:flex;flex-direction:column;gap:10px}
.bar{height:6px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),#9cc9ff);border-radius:99px}
.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:18px}@media(max-width:900px){.hero{grid-template-columns:1fr}}
.cont{display:flex;flex-direction:column;justify-content:space-between;gap:20px;min-height:190px;background:linear-gradient(135deg,rgba(61,147,242,.22),rgba(11,20,38,.6));border-color:rgba(94,176,255,.35)}
.lessons{display:flex;flex-direction:column}
.lesson{display:flex;align-items:center;gap:14px;padding:13px 6px;border-bottom:1px solid var(--line);color:var(--text)}
.lesson:last-child{border-bottom:0}.lesson:hover{background:rgba(255,255,255,.03)}
.dot{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--line2);display:grid;place-items:center;font-size:12px;color:var(--muted);flex:none}
.dot.done{background:var(--ok);border-color:var(--ok);color:#04201a}
.mod{font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:22px 0 4px;font-weight:600}

/* player */
.player{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px;align-items:start}
@media(max-width:1000px){.player{grid-template-columns:1fr}}
.video{background:#000;border-radius:var(--r-m);overflow:hidden;aspect-ratio:16/9;border:1px solid var(--line)}
.video video{width:100%;height:100%;display:block;background:#000}
.video .ph{height:100%;display:grid;place-items:center;color:var(--muted)}
.side{max-height:70vh;overflow:auto;padding:8px 14px}
.side .lesson{padding:10px 4px;font-size:14.5px}.side .lesson.cur{background:rgba(94,176,255,.1);border-radius:10px}

/* mentorias */
.ment{display:flex;gap:18px;align-items:center}
.date{flex:none;width:68px;text-align:center;background:rgba(94,176,255,.1);border:1px solid rgba(94,176,255,.3);border-radius:14px;padding:8px 0}
.date b{display:block;font-size:26px;line-height:1}.date span{font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--cyan-h)}
.ment .info{flex:1;min-width:0}.ment .acts{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
@media(max-width:640px){.ment{flex-wrap:wrap}.ment .acts{width:100%}}

/* sala */
.room{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:16px;height:calc(100vh - 190px);min-height:520px}
@media(max-width:1000px){.room{grid-template-columns:1fr;height:auto}}
.tiles{display:grid;gap:12px;grid-auto-rows:1fr;align-content:stretch}
.tiles.n1{grid-template-columns:1fr}.tiles.n2{grid-template-columns:1fr 1fr}.tiles.n3,.tiles.n4{grid-template-columns:1fr 1fr}.tiles.n5{grid-template-columns:repeat(3,1fr)}
@media(max-width:700px){.tiles.n2,.tiles.n3,.tiles.n4,.tiles.n5{grid-template-columns:1fr 1fr}}
.tile{position:relative;background:#050b16;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;min-height:180px}
.tile video{width:100%;height:100%;object-fit:cover;display:block}
.tile.screen video{object-fit:contain;background:#000}
.tile .nm{position:absolute;left:10px;bottom:10px;background:rgba(4,7,13,.75);backdrop-filter:blur(8px);padding:4px 11px;border-radius:99px;font-size:13px}
.tile .off{position:absolute;inset:0;display:none;place-items:center;background:#07101f}
.tile.camoff .off{display:grid}.tile.camoff video{visibility:hidden}
.tile .off .avatar{width:64px;height:64px;font-size:26px}
.ctrls{display:flex;gap:10px;justify-content:center;margin-top:14px;flex-wrap:wrap}
.cbtn{width:50px;height:50px;border-radius:50%;border:1px solid var(--line2);background:rgba(255,255,255,.06);color:#fff;font-size:19px;cursor:pointer;display:grid;place-items:center;transition:.2s}
.cbtn:hover{background:rgba(255,255,255,.12)}.cbtn.off{background:#3a1b24;border-color:#7a2c3a}.cbtn.leave{background:#c0343f;border-color:#c0343f;width:auto;padding:0 22px;border-radius:99px;font-size:15px;font-weight:600}
.chat{display:flex;flex-direction:column;padding:0;height:100%;min-height:300px}
.chat .log{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:10px;font-size:14.5px}
.chat .log b{color:var(--cyan-h)}.chat form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.status{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}

table{width:100%;border-collapse:collapse;font-size:14.5px}th{text-align:left;color:var(--muted);font-weight:600;font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;padding:10px 12px;border-bottom:1px solid var(--line)}
td{padding:13px 12px;border-bottom:1px solid var(--line);vertical-align:middle}tr:last-child td{border-bottom:0}
.tw{overflow-x:auto}.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;font-size:14.5px}.kv dt{color:var(--muted)}.kv dd{margin:0}
.stat b{display:block;font-size:34px;letter-spacing:-.03em}.stat span{color:var(--muted);font-size:14px}
code,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:rgba(0,0,0,.35);border:1px solid var(--line);padding:2px 8px;border-radius:7px;font-size:14px}
.cred{font-size:17px;padding:14px 16px;display:block;margin:8px 0;user-select:all}
.empty{text-align:center;padding:42px 20px;color:var(--muted)}
.foot{border-top:1px solid var(--line);padding:26px 0;color:var(--muted);font-size:13.5px}
details summary{cursor:pointer;color:var(--cyan-h);font-weight:600;margin:6px 0}