:root{
  --bg:#1a1326; --bg2:#231a35; --panel:#2a2040; --panel2:#33284d; --line:rgba(185,158,232,.25);
  --ink:#f6f1ff; --muted:#b9a9d6; --orange:#FF5900; --orange2:#ff7a2e; --purple:#5D428C; --lilac:#B99EE8;
  --ok:#4fd18b; --warn:#ffc24b; --bad:#ff6b6b;
  --ui:"Figtree",system-ui,sans-serif; --head:"Zilla Slab",Georgia,serif; --px:"Pixelify Sans","Courier New",monospace; --term:"VT323",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:15px/1.5 var(--ui);min-height:100vh;
  background-image:linear-gradient(rgba(185,158,232,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(185,158,232,.05) 1px,transparent 1px);
  background-size:32px 32px}
a{color:var(--lilac)}
h1,h2,h3{font-family:var(--head);margin:0 0 .4em;line-height:1.15}
small,.muted{color:var(--muted)}

/* marca */
.brand{display:flex;align-items:center;gap:12px}
.brand .logo{width:44px;height:44px;background:#fff;border:3px solid var(--ink);box-shadow:4px 4px 0 var(--orange);display:grid;place-items:center;padding:5px;image-rendering:pixelated}
.brand .logo img{width:100%;height:100%;image-rendering:pixelated}
.brand b{font:700 22px/1 var(--px);letter-spacing:.5px;display:block}
.brand small{font-size:12px}

/* acceso */
.auth{min-height:100vh;display:grid;place-items:center;padding:24px 16px}
.card{background:var(--panel);border:3px solid var(--ink);box-shadow:8px 8px 0 var(--purple);padding:28px;width:100%;max-width:420px}
.card .brand{margin-bottom:22px}
.card h1{font-size:26px}
.card p.lead{color:var(--muted);margin:0 0 18px}
.screen{background:#0d0a14;border:2px solid var(--lilac);font:20px/1.2 var(--term);color:#9dffb5;padding:10px 12px;margin-bottom:18px}

label{display:block;font-weight:600;font-size:13px;margin:14px 0 6px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
input[type=text],input[type=email],input[type=password],textarea,select{
  width:100%;background:#120d1c;color:var(--ink);border:2px solid var(--line);padding:11px 12px;font:16px var(--ui);border-radius:0}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--orange)}
textarea{min-height:140px;font-family:ui-monospace,Menlo,monospace;font-size:14px}
.code-input{text-transform:uppercase;letter-spacing:.15em;font-family:var(--term)!important;font-size:22px!important}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--orange);color:#fff;border:3px solid var(--ink);
  box-shadow:4px 4px 0 var(--ink);font:700 15px var(--ui);padding:10px 18px;cursor:pointer;text-decoration:none;transition:transform .05s}
.btn:hover{background:var(--orange2)}
.btn:active{transform:translate(3px,3px);box-shadow:1px 1px 0 var(--ink)}
.btn.block{width:100%;margin-top:22px}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:3px 3px 0 var(--purple)}
.btn.ghost:hover{background:var(--panel2)}
.btn.sm{padding:6px 10px;font-size:13px;border-width:2px;box-shadow:2px 2px 0 var(--ink)}
.linkline{margin-top:18px;text-align:center;font-size:14px}

.alert{border:2px solid;padding:10px 12px;margin:0 0 14px;font-size:14px}
.alert.err{border-color:var(--bad);background:rgba(255,107,107,.1)}
.alert.ok{border-color:var(--ok);background:rgba(79,209,139,.1)}
.alert.info{border-color:var(--lilac);background:rgba(185,158,232,.1)}

/* panel */
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;background:var(--bg2);border-bottom:3px solid var(--ink);flex-wrap:wrap}
.top .who{display:flex;align-items:center;gap:14px;font-size:14px}
.wrap{max-width:1180px;margin:0 auto;padding:24px 16px 60px}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.8fr);gap:20px;align-items:start}
@media (max-width:900px){.grid2{grid-template-columns:1fr}}
.box{background:var(--panel);border:2px solid var(--line);padding:20px}
.box h2{font-size:20px}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:20px}
@media (max-width:640px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
.stat{background:var(--panel);border:2px solid var(--line);padding:14px}
.stat b{display:block;font:700 30px/1 var(--px)}
.stat span{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:12px}
.toolbar input{max-width:260px;padding:8px 10px;font-size:14px}

.tbl-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:middle}
th{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:600}
td .em{color:var(--muted);font-size:12px}
.code{font:20px/1 var(--term);letter-spacing:.08em;color:#9dffb5;background:#0d0a14;padding:3px 7px;border:1px solid var(--line);white-space:nowrap}
.tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border:1.5px solid;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap}
.tag.ok{color:var(--ok)} .tag.wait{color:var(--warn)} .tag.off{color:var(--bad)}
.actions{display:flex;gap:6px;flex-wrap:wrap}
.actions form{margin:0}
.hint{font-size:13px;color:var(--muted);margin:8px 0 0}

/* inicio alumno */
.hero{max-width:640px;margin:60px auto;text-align:center;padding:0 16px}
.hero .card{max-width:none;text-align:left}

/* tarjetas imprimibles */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:20px}
.pcard{border:2px dashed #555;padding:14px;background:#fff;color:#111;break-inside:avoid;font-family:var(--ui)}
.pcard .t{font:700 16px var(--px)}
.pcard .n{font-weight:700;margin-top:8px}
.pcard .e{font-size:12px;color:#444;word-break:break-all}
.pcard .c{font:28px/1 var(--term);letter-spacing:.1em;margin:8px 0;background:#f3eefc;padding:6px;text-align:center;border:1px solid #ccc}
.pcard .u{font-size:11px;color:#333}
body.print{background:#fff;color:#111}
.noprint{padding:16px 20px;display:flex;gap:10px;align-items:center;background:var(--bg2)}
@media print{.noprint{display:none}.cards{padding:0}body{background:#fff}}