*{margin:0;padding:0;box-sizing:border-box}
:root{--azul:#1a5276;--azul2:#2980b9;--verde:#27ae60;--rojo:#e74c3c;--naranja:#f39c12;--morado:#8e44ad;--morado2:#6c3483;--gris1:#f4f6f8;--gris2:#e9ecef;--gris3:#6c757d;--gris4:#343a40;--blanco:#fff;--sombra:0 2px 8px rgba(0,0,0,.08)}
body{font-family:'Segoe UI',system-ui,sans-serif;background:var(--gris1);color:var(--gris4);line-height:1.5}

.login-body{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,var(--morado),var(--morado2));padding:20px}
.login-card{background:var(--blanco);border-radius:14px;padding:40px 35px;width:100%;max-width:400px;text-align:center;box-shadow:0 8px 30px rgba(0,0,0,.15)}
.login-icon{font-size:3rem;margin-bottom:10px}
.login-card h2{color:var(--morado);margin-bottom:4px;font-size:1.4rem}
.subtitulo{color:var(--gris3);font-size:.85rem;margin-bottom:25px}

.campo{margin-bottom:18px;text-align:left}
.campo label{display:block;font-weight:600;font-size:.85rem;margin-bottom:5px}
.campo input,.campo select,.campo textarea{width:100%;padding:11px 14px;border:2px solid var(--gris2);border-radius:8px;font-size:.95rem;transition:.2s}
.campo input:focus,.campo select:focus,.campo textarea:focus{outline:none;border-color:var(--morado);box-shadow:0 0 0 3px rgba(142,68,173,.12)}

.btn{display:inline-block;padding:11px 24px;border:none;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;transition:.2s;text-decoration:none;text-align:center}
.btn-block{display:block;width:100%}
.btn-morado{background:var(--morado);color:var(--blanco)}.btn-morado:hover{background:var(--morado2)}
.btn-azul{background:var(--azul);color:var(--blanco)}.btn-azul:hover{background:var(--azul2)}
.btn-verde{background:var(--verde);color:var(--blanco)}.btn-verde:hover{opacity:.9}
.btn-gris{background:var(--gris2);color:var(--gris4)}.btn-gris:hover{background:var(--gris3);color:var(--blanco)}
.btn-sm{padding:8px 16px;font-size:.85rem}
.btn-xs{padding:5px 12px;font-size:.8rem}
.btn-mini{border:none;border-radius:6px;padding:4px 10px;cursor:pointer;font-size:.8rem;transition:.2s}
.btn-rojo{background:#fce4ec;color:var(--rojo)}.btn-rojo:hover{background:var(--rojo);color:var(--blanco)}
.btn-azulm{background:#e3f2fd;color:var(--azul)}.btn-azulm:hover{background:var(--azul);color:var(--blanco)}
.btn-verde-m{background:#e8f5e9;color:var(--verde)}.btn-verde-m:hover{background:var(--verde);color:var(--blanco)}

.header{padding:12px 0;position:sticky;top:0;z-index:50;box-shadow:var(--sombra)}
.admin-header{background:linear-gradient(135deg,var(--morado),var(--morado2));color:var(--blanco)}
.header-inner{max-width:1100px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.btn-salir{color:var(--blanco);background:rgba(255,255,255,.15);padding:5px 14px;border-radius:20px;font-size:.8rem;text-decoration:none}.btn-salir:hover{background:rgba(255,255,255,.25)}

.nav-admin{display:flex;gap:4px}
.nav-link{color:rgba(255,255,255,.7);text-decoration:none;padding:6px 14px;border-radius:6px;font-size:.85rem;font-weight:600;transition:.2s}
.nav-link:hover{color:var(--blanco);background:rgba(255,255,255,.15)}
.nav-link.activo{color:var(--blanco);background:rgba(255,255,255,.2)}

.contenedor-admin{max-width:1100px;margin:0 auto;padding:25px 20px}
.titulo-pagina{font-size:1.3rem;margin-bottom:20px}

.caja{background:var(--blanco);border-radius:12px;box-shadow:var(--sombra);padding:22px 25px;margin-bottom:20px}
.caja-titulo{font-size:1rem;margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid var(--gris2)}

.alerta{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:.88rem}
.alerta.error{background:#fce4ec;color:#c62828;border-left:4px solid var(--rojo)}
.alerta.info{background:#e3f2fd;color:#1565c0;border-left:4px solid var(--azul2)}
.alerta.ok{background:#e8f5e9;color:#2e7d32;border-left:4px solid var(--verde)}
.nota{font-size:.82rem;color:var(--gris3);margin-bottom:14px}

.cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--blanco);border-radius:12px;box-shadow:var(--sombra);padding:20px;text-align:center;border-top:4px solid}
.stat-card.azul{border-top-color:var(--azul2)}.stat-card.verde{border-top-color:var(--verde)}.stat-card.naranja{border-top-color:var(--naranja)}.stat-card.morado{border-top-color:var(--morado)}.stat-card.rojo{border-top-color:var(--rojo)}
.stat-num{font-size:2rem;font-weight:700;line-height:1}.stat-label{font-size:.82rem;color:var(--gris3);margin-top:4px}

.tabla{width:100%;border-collapse:collapse;font-size:.88rem}
.tabla thead th{background:var(--gris2);color:var(--gris4);padding:10px 14px;text-align:left;font-weight:600;font-size:.78rem;text-transform:uppercase}
.tabla tbody td{padding:10px 14px;border-bottom:1px solid var(--gris2)}
.tabla tbody tr:hover{background:rgba(142,68,173,.03)}
.tc{text-align:center}.fw{font-weight:700}
.vacio{color:#999;text-align:center;padding:20px}
.vacio a{color:var(--morado)}

.barra-fondo{background:var(--gris2);border-radius:8px;height:10px;overflow:hidden}
.barra-progreso{height:100%;border-radius:8px;transition:width .4s}
.progreso-info{display:flex;justify-content:space-between;margin-bottom:6px;font-size:.9rem}

.cal-badge{display:inline-block;padding:3px 10px;border-radius:20px;font-weight:600;font-size:.78rem}
.cal-ex{background:#e8f5e9;color:#2e7d32}.cal-ok{background:#e3f2fd;color:#1565c0}.cal-reg{background:#fff8e1;color:#f57f17}.cal-mal{background:#fce4ec;color:#c62828}

.tipo-badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.75rem;font-weight:600}
.tipo-badge.nor{background:var(--gris2);color:var(--gris3)}.tipo-badge.seg{background:#fff3e0;color:#e65100}

.estado-badge{display:inline-block;padding:3px 10px;border-radius:12px;font-size:.75rem;font-weight:600}
.badge-borrador{background:var(--gris2);color:var(--gris3)}
.badge-activa{background:#e8f5e9;color:#2e7d32}
.badge-cerrada{background:#fce4ec;color:#c62828}

.filtros-flex{display:flex;gap:14px;align-items:end;flex-wrap:wrap}
.flex-row{display:flex;gap:12px;flex-wrap:wrap}

.tabs{display:flex;gap:0;margin-bottom:20px;background:var(--blanco);border-radius:12px;box-shadow:var(--sombra);overflow:hidden}
.tab{flex:1;padding:12px;text-align:center;text-decoration:none;color:var(--gris3);font-weight:600;font-size:.88rem;border-bottom:3px solid transparent;transition:.2s}
.tab:hover{color:var(--morado);background:rgba(142,68,173,.03)}
.tab.activo{color:var(--morado);border-bottom-color:var(--morado);background:rgba(142,68,173,.05)}

.input-tabla{padding:6px 10px;border:1px solid #ddd;border-radius:6px;font-size:.85rem}
.input-wide{width:100%;min-width:180px}.input-num{width:65px}.input-num-sm{width:55px}
.inline-form{display:flex;gap:6px;align-items:center;flex-wrap:wrap}

@media(max-width:768px){
    .header-inner{flex-direction:column;text-align:center}
    .nav-admin{justify-content:center;flex-wrap:wrap}
    .cards-grid{grid-template-columns:repeat(2,1fr)}
    .filtros-flex{flex-direction:column}
    .tabs{flex-direction:column}
    .tab{border-bottom:none;border-left:3px solid transparent}
    .tab.activo{border-left-color:var(--morado)}
}
@media(max-width:480px){.cards-grid{grid-template-columns:1fr}}

/* Filtros box docentes */
.filtros-box{display:flex;gap:12px;align-items:end;flex-wrap:wrap;padding:14px 0;margin-bottom:14px;border-bottom:1px solid var(--gris2)}
.filtro-item{display:flex;flex-direction:column;gap:4px}
.filtro-item label{font-size:.75rem;font-weight:600;color:var(--gris3);text-transform:uppercase;letter-spacing:.3px}
.filtro-item input,.filtro-item select{padding:9px 12px;border:2px solid var(--gris2);border-radius:8px;font-size:.88rem;transition:.2s}
.filtro-item input:focus,.filtro-item select:focus{outline:none;border-color:var(--morado);box-shadow:0 0 0 3px rgba(142,68,173,.1)}
.filtro-buscar{flex:1;min-width:180px}
.filtro-buscar input{width:100%}
.filtro-counter{justify-content:center;padding:9px 0}
.filtro-counter span{font-size:1.3rem;font-weight:800;color:var(--morado)}

/* Acción masiva */
.accion-masiva{background:#f8f0ff;border-radius:8px;padding:12px 16px;margin-bottom:14px}
.seleccion-count{font-size:.82rem;font-weight:600;color:var(--morado);padding:8px 0}

/* Curso tags en tabla */
.curso-tag{display:inline-block;background:var(--gris2);color:var(--gris4);padding:2px 8px;border-radius:10px;font-size:.72rem;font-weight:600;margin:1px}

@media(max-width:768px){.filtros-box{flex-direction:column}.filtro-item{width:100%}}

/* Ciclos checkboxes */
.ciclos-check{display:flex;gap:10px;flex-wrap:wrap;padding:8px 0}
.ciclo-option{cursor:pointer;display:flex;align-items:center;gap:6px}
.ciclo-option input{accent-color:var(--morado);width:18px;height:18px}
.ciclo-tag{background:var(--gris2);padding:6px 14px;border-radius:8px;font-size:.88rem;font-weight:600;transition:.2s}
.ciclo-option input:checked+.ciclo-tag{background:var(--morado);color:var(--blanco)}
.ciclo-badge{display:inline-block;background:#f0e6f6;color:var(--morado);padding:2px 8px;border-radius:10px;font-size:.7rem;font-weight:600;margin:1px}

/* Foto mini en tabla */
.foto-mini{width:36px;height:36px;border-radius:50%;overflow:hidden;border:2px solid var(--gris2)}
.foto-mini img{width:100%;height:100%;object-fit:cover}
.avatar-mini{width:100%;height:100%;background:linear-gradient(135deg,var(--morado),#9b59b6);color:var(--blanco);display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700}

/* Ranking cards */
.ranking-cards{display:flex;flex-direction:column;gap:10px}
.ranking-card{display:flex;align-items:center;gap:14px;padding:14px 18px;border:2px solid var(--gris2);border-radius:12px;transition:.2s;background:var(--blanco)}
.ranking-card:hover{border-color:var(--morado);box-shadow:0 4px 12px rgba(0,0,0,.06)}
.ranking-card.ranking-top{border-color:var(--naranja);background:linear-gradient(135deg,#fffdf5,#fff8e1)}

.ranking-pos{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--blanco);font-weight:800;font-size:.9rem;flex-shrink:0}
.ranking-pos-top{width:44px;height:44px;font-size:1.3rem;box-shadow:0 2px 8px rgba(0,0,0,.15)}

.ranking-foto{width:50px;height:50px;border-radius:50%;overflow:hidden;border:2px solid var(--gris2);flex-shrink:0}
.ranking-foto img{width:100%;height:100%;object-fit:cover}
.ranking-foto-lg{width:60px;height:60px;border-width:3px}
.avatar-rank{width:100%;height:100%;background:linear-gradient(135deg,var(--morado),#9b59b6);color:var(--blanco);display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700}
.avatar-rank-lg{font-size:1.6rem}

.ranking-info{flex:1;min-width:0}
.ranking-nombre{font-weight:700;font-size:.95rem;color:var(--gris4)}
.ranking-cursos{font-size:.78rem;color:var(--morado);margin-top:2px}
.ranking-meta{font-size:.75rem;color:var(--gris3);margin-top:3px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}

.ranking-score{text-align:right;flex-shrink:0}
.ranking-num{font-size:1.5rem;font-weight:800;line-height:1}
.ranking-num-lg{font-size:1.8rem}

@media(max-width:600px){
    .ranking-card{flex-wrap:wrap;gap:10px}
    .ranking-foto{width:40px;height:40px}
    .ranking-foto-lg{width:48px;height:48px}
    .ranking-nombre{font-size:.85rem}
    .ranking-num{font-size:1.2rem}
}