:root{
  --c:#2563eb;--c2:#172554;--soft:#eff6ff;--bg:#f4f7fb;--surface:#fff;
  --text:#172033;--muted:#667085;--line:#e6eaf0;--success:#16a34a;--danger:#dc2626;
  --shadow:0 14px 34px rgba(15,23,42,.08);--radius:18px;--sidebar:270px
}
.theme-punto{--c:#7c3aed;--c2:#32115d;--soft:#f4efff;--bg:#f7f4fc}
.theme-electricidad{--c:#d89b00;--c2:#5b3600;--soft:#fff8dc;--bg:#fcf9ef}
.theme-mecanica{--c:#0f766e;--c2:#123f3c;--soft:#eafaf7;--bg:#f2f9f8}
.theme-general{--c:#2563eb;--c2:#172554;--soft:#eff6ff;--bg:#f4f7fb}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.45}button,input,select,textarea{font:inherit}.app-shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);background:linear-gradient(180deg,var(--c2),color-mix(in srgb,var(--c2) 75%,#000));color:#fff;padding:24px 18px;z-index:30;display:flex;flex-direction:column;box-shadow:14px 0 40px rgba(15,23,42,.14)}.brand-wrap{display:flex;gap:12px;align-items:center;padding:4px 8px 24px;border-bottom:1px solid rgba(255,255,255,.13)}.brand-mark{width:46px;height:46px;border-radius:14px;background:linear-gradient(145deg,rgba(255,255,255,.28),rgba(255,255,255,.08));display:grid;place-items:center;font-size:24px;box-shadow:inset 0 1px rgba(255,255,255,.25)}.brand{font-size:19px;font-weight:850;letter-spacing:-.3px}.brand-sub{font-size:12px;color:rgba(255,255,255,.65);margin-top:2px}.area-chip{margin:18px 4px 10px;padding:12px 13px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.12);border-radius:14px}.area-chip small{display:block;color:rgba(255,255,255,.62);font-size:11px;text-transform:uppercase;letter-spacing:.08em}.area-chip strong{display:block;margin-top:3px;font-size:14px}.nav{display:flex;flex-direction:column;gap:6px;margin-top:10px}.nav a{display:flex;align-items:center;gap:11px;color:rgba(255,255,255,.78);text-decoration:none;padding:11px 12px;border-radius:12px;font-weight:650;font-size:14px;transition:.18s}.nav a:hover,.nav a.active{color:white;background:rgba(255,255,255,.14);transform:translateX(2px)}.nav-icon{width:22px;text-align:center;font-size:17px}.nav-bottom{margin-top:auto}.user-mini{display:flex;align-items:center;gap:10px;padding:14px 8px;border-top:1px solid rgba(255,255,255,.13);margin-top:18px}.avatar{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.18);display:grid;place-items:center;font-weight:800}.user-mini b{font-size:13px;display:block}.user-mini small{font-size:11px;color:rgba(255,255,255,.6)}.content-shell{margin-left:var(--sidebar);min-height:100vh}.topbar{height:76px;background:rgba(255,255,255,.84);backdrop-filter:blur(16px);border-bottom:1px solid rgba(230,234,240,.8);display:flex;align-items:center;justify-content:space-between;padding:0 30px;position:sticky;top:0;z-index:20}.page-context h1{font-size:19px;margin:0;letter-spacing:-.25px}.page-context p{font-size:12px;color:var(--muted);margin:3px 0 0}.top-actions{display:flex;align-items:center;gap:10px}.status-dot{width:9px;height:9px;background:#22c55e;border-radius:50%;box-shadow:0 0 0 4px #dcfce7}.wrap{max-width:1480px;margin:0 auto;padding:28px 30px 48px}.wrap>h1{font-size:28px;letter-spacing:-.7px;margin:4px 0 20px}.card{background:var(--surface);border:1px solid rgba(230,234,240,.9);border-radius:var(--radius);padding:21px;box-shadow:var(--shadow);margin-bottom:18px}.card h2,.card h3{margin-top:0;letter-spacing:-.25px}.card h2{font-size:20px}.card h3{font-size:17px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:16px}.grid>.card{margin-bottom:0}.kpi{font-size:34px;font-weight:900;color:var(--c);letter-spacing:-1px;line-height:1.1}.kpi-card{position:relative;overflow:hidden;min-height:132px}.kpi-card:after{content:'';position:absolute;width:90px;height:90px;border-radius:50%;background:var(--soft);right:-22px;top:-24px}.kpi-label{color:var(--muted);font-size:13px;margin-top:9px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:8px 0 15px}.section-title h2{margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,var(--c),color-mix(in srgb,var(--c) 75%,#111));color:white;border:0;border-radius:11px;padding:10px 15px;text-decoration:none;cursor:pointer;font-weight:750;font-size:14px;box-shadow:0 7px 18px color-mix(in srgb,var(--c) 24%,transparent);transition:.18s}.btn:hover{transform:translateY(-1px);filter:brightness(1.04)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.btn.secondary{background:white;color:var(--c);border:1px solid color-mix(in srgb,var(--c) 25%,#ddd);box-shadow:none}.btn.danger{background:#dc2626}.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px}.field-end{align-self:end}label{font-size:12px;font-weight:750;color:#475467;display:block;margin-bottom:2px}input,select,textarea{width:100%;padding:11px 12px;border:1px solid #d9e0e9;border-radius:11px;margin:5px 0 12px;background:#fbfcfe;color:var(--text);outline:none;transition:.18s}input:focus,select:focus,textarea:focus{border-color:var(--c);box-shadow:0 0 0 4px color-mix(in srgb,var(--c) 12%,transparent);background:white}textarea{min-height:92px;resize:vertical}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}th{background:#f8fafc;color:#475467;font-size:11px;text-transform:uppercase;letter-spacing:.055em}td{font-size:13px}tr:last-child td{border-bottom:0}tr:hover td{background:#fcfdff}.msg{padding:13px 15px;border-radius:12px;background:#ecfdf3;color:#166534;border:1px solid #bbf7d0;margin-bottom:16px;font-weight:650}.err{background:#fef2f2;color:#991b1b;border-color:#fecaca}.badge{display:inline-flex;align-items:center;padding:5px 9px;border-radius:999px;background:#eef2f6;color:#475467;font-size:11px;font-weight:750;text-transform:capitalize}.badge.active,.badge.aprobada,.badge.libre{background:#dcfce7;color:#166534}.badge.pendiente{background:#fef3c7;color:#92400e}.badge.rechazada,.badge.atrasado,.badge.ocupado{background:#fee2e2;color:#991b1b}.locker{padding:18px;border-radius:15px;border:1px solid var(--line);text-align:center;background:white;box-shadow:0 8px 22px rgba(15,23,42,.05);position:relative;overflow:hidden}.locker:before{content:'🔐';display:block;font-size:27px;margin-bottom:8px}.locker.free{border-color:#86efac;background:#f0fdf4}.locker.busy{border-color:#fca5a5;background:#fef2f2}.small{font-size:12px;color:var(--muted)}.empty-state{text-align:center;padding:35px 20px;color:var(--muted)}.empty-state .emoji{font-size:42px;display:block;margin-bottom:8px}
/* Login */
.login-page{min-height:100vh;display:grid;grid-template-columns:1.15fr .85fr;background:#f6f8fc}.login-visual{position:relative;overflow:hidden;background:linear-gradient(140deg,#111f48,#2563eb 56%,#7c3aed);color:white;padding:64px;display:flex;flex-direction:column;justify-content:space-between}.login-visual:before,.login-visual:after{content:'';position:absolute;border-radius:50%;filter:blur(1px);background:rgba(255,255,255,.08)}.login-visual:before{width:420px;height:420px;right:-130px;top:-110px}.login-visual:after{width:250px;height:250px;left:-90px;bottom:-70px}.login-logo{position:relative;z-index:1;display:flex;align-items:center;gap:14px;font-weight:850;font-size:22px}.login-copy{position:relative;z-index:1;max-width:620px}.login-copy h1{font-size:52px;line-height:1.02;letter-spacing:-2px;margin:0 0 18px}.login-copy p{font-size:17px;color:rgba(255,255,255,.76);max-width:520px}.feature-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:28px}.feature{padding:15px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.09);border-radius:15px;font-size:13px}.login-side{display:flex;align-items:center;justify-content:center;padding:42px}.login{width:100%;max-width:460px}.login.card{margin:0;padding:34px}.login h2{font-size:28px;margin:0 0 8px}.login .lead{color:var(--muted);margin-bottom:24px}.login-footer{font-size:12px;color:var(--muted);text-align:center;margin-top:18px}
/* Student material cards */
.material-card{display:flex;flex-direction:column;min-height:250px}.material-icon{width:48px;height:48px;border-radius:14px;background:var(--soft);display:grid;place-items:center;font-size:24px;margin-bottom:14px}.material-card p{color:var(--muted)}.stock-line{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:700}.countdown{font-size:21px;font-weight:850;color:var(--c);background:var(--soft);padding:12px 14px;border-radius:12px;display:inline-block}
@media(max-width:980px){:root{--sidebar:0px}.sidebar{position:static;width:100%;height:auto;padding:14px 16px}.app-shell{display:block}.brand-wrap{padding:0;border:0}.area-chip,.user-mini{display:none}.nav{flex-direction:row;overflow-x:auto;margin:12px 0 0;padding-bottom:3px}.nav a{white-space:nowrap;padding:9px 11px}.nav-bottom{margin-top:0}.content-shell{margin-left:0}.topbar{display:none}.wrap{padding:20px 16px 40px}.login-page{grid-template-columns:1fr}.login-visual{display:none}.login-side{min-height:100vh;padding:22px}.feature-list{grid-template-columns:1fr}}
@media(max-width:640px){.card{padding:17px;border-radius:15px}.wrap>h1{font-size:24px}.grid{grid-template-columns:1fr}.row{grid-template-columns:1fr}.login.card{padding:24px}.btn{width:100%}.table-wrap{margin:0 -4px}.nav-icon{display:none}}

/* Integración NFC */
.nfc-panel{position:relative;overflow:hidden;border:1px solid color-mix(in srgb,var(--primary) 35%,transparent);background:linear-gradient(135deg,color-mix(in srgb,var(--primary) 9%,white),var(--card));}
.nfc-panel:after{content:"";position:absolute;width:190px;height:190px;border:28px solid color-mix(in srgb,var(--primary) 8%,transparent);border-radius:50%;right:-80px;top:-90px;pointer-events:none}
.nfc-head{display:flex;justify-content:space-between;gap:20px;align-items:center}.eyebrow{font-size:.72rem;letter-spacing:.18em;font-weight:800;color:var(--primary)}
.nfc-reader-icon{width:72px;height:72px;border-radius:22px;display:grid;place-items:center;font-size:2.4rem;background:color-mix(in srgb,var(--primary) 14%,white);color:var(--primary);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--primary) 20%,transparent)}
.nfc-status-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:14px 0}.nfc-dot{width:11px;height:11px;border-radius:50%;display:inline-block}.nfc-dot.online{background:#23b26d;box-shadow:0 0 0 5px rgba(35,178,109,.12)}.nfc-dot.offline{background:#e34d59;box-shadow:0 0 0 5px rgba(227,77,89,.12)}
.nfc-uid{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:rgba(0,0,0,.055);padding:5px 9px;border-radius:8px;font-size:.82rem}.nfc-student-card{display:flex;align-items:center;gap:12px;padding:14px;border-radius:16px;background:rgba(255,255,255,.75);border:1px solid rgba(0,0,0,.06)}.nfc-student-card small{display:block}.nfc-student-card .badge{margin-left:auto}.avatar.large{width:46px;height:46px;font-size:1.05rem}.nfc-highlight{outline:2px solid var(--primary);outline-offset:-2px;background:color-mix(in srgb,var(--primary) 8%,white)!important}

/* Sanciones exclusivas de Punto Estudiantil */
.sanction-hero{display:flex;justify-content:space-between;align-items:center;gap:22px;background:linear-gradient(135deg,#fff7ed,#fff);border-color:#fed7aa}.sanction-hero p{max-width:760px;color:var(--muted)}.sanction-icon{width:66px;height:66px;border-radius:20px;background:#ffedd5;color:#c2410c;display:grid;place-items:center;font-size:30px;flex:0 0 auto}.sanction-alert{display:flex;gap:16px;align-items:flex-start;background:#fff7ed;border-color:#fdba74}.sanction-alert h2{color:#9a3412;margin-bottom:6px}.sanction-alert p{margin:5px 0}.badge.sanction-advertencia{background:#fef3c7;color:#92400e}.badge.sanction-suspension{background:#ffedd5;color:#9a3412}.badge.sanction-bloqueo{background:#fee2e2;color:#991b1b}