/* ESTIN · BUSINESS TALENT SCHOOL - ADMIN (azul marino + naranja) */
:root {
    --c-primary: #141850;
    --c-primary-dark: #0C0F33;
    --c-primary-light: #ECEDF7;
    --c-accent: #E28915;
    --c-accent-dark: #C0700B;
    --c-dark: #0C0F33;
    --c-bg: #F7F8FB;
    --c-surface: #FFFFFF;
    --c-text: #1F2937;
    --c-text-soft: #6B7280;
    --c-text-muted: #9CA3AF;
    --c-border: #E5E7EB;
    --c-warning: #F59E0B;
    --c-warning-bg: #FEF3C7;
    --c-success: #10B981;
    --c-success-bg: #D1FAE5;
    --c-danger: #EF4444;
    --c-danger-bg: #FEE2E2;
    --c-info: #3B82F6;
    --c-info-bg: #DBEAFE;
}

* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: 'Inter', system-ui, sans-serif; background: var(--c-bg); color: var(--c-text); font-size: 14px; }
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4 { font-family: 'Plus Jakarta Sans', sans-serif; color: var(--c-dark); }

.app { display: flex; min-height: 100vh; }
.sidebar {
    width: 240px;
    background: linear-gradient(180deg, var(--c-dark) 0%, #111827 100%);
    color: white;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}
.sidebar-head { padding: 22px 22px 18px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar-head h1 { color: white; font-size: 17px; font-weight: 800; display: flex; align-items: center; gap: 10px; }
.sidebar-head .icon { width: 32px; height: 32px; background: linear-gradient(135deg,var(--c-primary),var(--c-accent)); border-radius: 9px; display:flex; align-items:center; justify-content:center; font-size: 18px; }
.sidebar-head small { color: rgba(255,255,255,0.5); font-size: 10.5px; margin-top: 4px; display: block; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; }
.sidebar-nav { list-style: none; padding: 18px 12px; flex: 1; overflow-y: auto; }
.sidebar-nav li { margin-bottom: 3px; }
.sidebar-nav a { display: flex; align-items: center; gap: 11px; padding: 10px 12px; border-radius: 9px; font-size: 13.5px; font-weight: 600; color: rgba(255,255,255,0.75); transition: 0.2s; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: white; }
.sidebar-nav a.active { background: var(--c-primary); color: white; box-shadow: 0 4px 14px rgba(20, 24, 80,0.3); }
.sidebar-nav a .badge { margin-left: auto; background: rgba(255,255,255,0.18); padding: 1px 7px; border-radius: 999px; font-size: 10.5px; font-weight: 700; }
.sidebar-nav-section { color: rgba(255,255,255,0.35); font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; padding: 14px 12px 6px; }
.sidebar-foot { padding: 14px 18px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 12px; color: rgba(255,255,255,0.5); }
.sidebar-foot a { color: var(--c-accent); }

.main { flex: 1; min-width: 0; }
.topbar { background: white; padding: 14px 28px; border-bottom: 1px solid var(--c-border); display: flex; align-items: center; justify-content: space-between; gap: 16px; position: sticky; top: 0; z-index: 10; }
.topbar h1 { font-size: 18px; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.topbar-user { display: flex; align-items: center; gap: 8px; padding: 6px 10px 6px 6px; background: var(--c-bg); border-radius: 999px; font-size: 12.5px; font-weight: 600; }
.topbar-user .avatar { width: 28px; height: 28px; background: linear-gradient(135deg,var(--c-primary),var(--c-accent)); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 13px; }
.content { padding: 28px; }

.card { background: white; border: 1px solid var(--c-border); border-radius: 14px; overflow: hidden; margin-bottom: 18px; }
.card-head { padding: 18px 22px; border-bottom: 1px solid var(--c-border); display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.card-head h2, .card-head h3 { font-size: 15.5px; font-weight: 700; }
.card-body { padding: 22px; }
.card-body.flush { padding: 0; }

.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi { background: white; padding: 20px 22px; border-radius: 14px; border: 1px solid var(--c-border); position: relative; overflow: hidden; }
.kpi-label { font-size: 11.5px; color: var(--c-text-muted); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; margin-bottom: 8px; }
.kpi-value { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 28px; font-weight: 800; color: var(--c-dark); line-height: 1; }
.kpi-meta { font-size: 12px; color: var(--c-text-soft); margin-top: 6px; }
.kpi-icon { position: absolute; top: 16px; right: 16px; width: 36px; height: 36px; background: var(--c-primary-light); color: var(--c-primary); border-radius: 10px; display: flex; align-items: center; justify-content: center; }

.table-wrap { overflow-x: auto; }
table.t { width: 100%; border-collapse: collapse; }
.t th, .t td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--c-border); font-size: 13px; }
.t .btn-sm { padding: 6px 10px; }
.t th { background: var(--c-bg); font-weight: 700; font-size: 11.5px; color: var(--c-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.t tr:hover td { background: rgba(20, 24, 80,0.03); }
.t .cell-strong { font-weight: 700; color: var(--c-dark); }
.t .cell-soft { color: var(--c-text-soft); font-size: 12px; margin-top: 2px; }
.t a.linkish { color: var(--c-primary); font-weight: 600; }
.t a.linkish:hover { color: var(--c-primary-dark); }

.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 10.5px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.04em; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--c-border); margin-bottom: 20px; flex-wrap: wrap; }
.tabs a { padding: 10px 16px; font-size: 13px; font-weight: 600; color: var(--c-text-muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a.active { color: var(--c-dark); border-color: var(--c-primary); }
.tabs a .num { background: var(--c-bg); padding: 1px 7px; border-radius: 999px; font-size: 10.5px; margin-left: 4px; }
.tabs a.active .num { background: var(--c-primary); color: white; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 700px) { .form-row, .form-row-3 { grid-template-columns: 1fr; } }
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 12px; font-weight: 700; color: var(--c-dark); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.04em; }
.form-control { width: 100%; padding: 10px 12px; border: 1.5px solid var(--c-border); border-radius: 9px; font-family: inherit; font-size: 13.5px; background: white; transition: 0.2s; }
.form-control:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(20, 24, 80,0.1); }
textarea.form-control { resize: vertical; min-height: 70px; }
.form-help { font-size: 11.5px; color: var(--c-text-muted); margin-top: 4px; }

/* Buscador de alumnos (Registrar pago) */
.picker [hidden], .picker[hidden] { display: none !important; }
.picker-results { margin-top: 6px; border: 1.5px solid var(--c-border); border-radius: 10px; background: white; max-height: 360px; overflow-y: auto; }
.picker-head, .picker-more, .picker-empty { padding: 9px 12px; font-size: 12px; color: var(--c-text-soft); }
.picker-head { font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; font-size: 11px; border-bottom: 1px solid var(--c-border); }
.picker-more { border-top: 1px solid var(--c-border); }
.picker-item { padding: 10px 12px; cursor: pointer; border-bottom: 1px solid var(--c-border); }
.picker-item:last-child { border-bottom: none; }
.picker-item.is-active { background: var(--c-primary-light); }
.picker-name { font-weight: 600; color: var(--c-dark); font-size: 14px; }
.picker-sub { font-size: 12px; color: var(--c-text-soft); margin-top: 2px; overflow-wrap: anywhere; }
.picker-sel { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 12px 14px; background: var(--c-bg); border-radius: 10px; border-left: 3px solid var(--c-primary); }
.picker-sel-main { min-width: 0; }
.picker-sel strong { color: var(--c-dark); font-size: 14.5px; }
.picker-hint { font-size: 11.5px; color: var(--c-text-muted); margin-top: 6px; }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 18px; border-radius: 999px; font-weight: 700; font-size: 13px; border: none; cursor: pointer; transition: 0.2s; font-family: inherit; text-decoration: none; }
.btn-primary { background: var(--c-primary); color: white; }
.btn-primary:hover { background: var(--c-primary-dark); }
.btn-accent { background: var(--c-accent); color: var(--c-dark); }
.btn-outline { background: white; color: var(--c-dark); border: 1.5px solid var(--c-border); }
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-success { background: var(--c-success); color: white; }
.btn-danger { background: var(--c-danger); color: white; }
.btn-sm { padding: 6px 12px; font-size: 11.5px; }
.btn-icon { width: 32px; height: 32px; padding: 0; justify-content: center; }

.toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.toolbar input[type="text"], .toolbar input[type="search"], .toolbar select, .toolbar input[type="date"] { padding: 9px 12px; border: 1.5px solid var(--c-border); border-radius: 9px; background: white; font-family: inherit; font-size: 13px; flex: 1; min-width: 180px; }

/* LOGIN */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent-dark) 100%); padding: 20px; }
.login-card { background: white; border-radius: 20px; padding: 40px 36px; max-width: 400px; width: 100%; box-shadow: 0 20px 60px rgba(0,0,0,0.2); }
.login-logo { width: 60px; height: 60px; margin: 0 auto 16px; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); border-radius: 16px; display: flex; align-items: center; justify-content: center; color: white; font-size: 26px; }
.login-card h1 { text-align: center; font-size: 22px; margin-bottom: 6px; }
.login-card p { text-align: center; color: var(--c-text-soft); font-size: 13.5px; margin-bottom: 26px; }

.alert { padding: 12px 14px; border-radius: 10px; font-size: 13px; margin-bottom: 16px; }
.alert-err { background: var(--c-danger-bg); color: var(--c-danger); border-left: 3px solid var(--c-danger); }
.alert-ok { background: var(--c-success-bg); color: var(--c-success); border-left: 3px solid var(--c-success); }
.alert-info { background: var(--c-info-bg); color: var(--c-info); border-left: 3px solid var(--c-info); }

.empty-state { text-align: center; padding: 60px 24px; color: var(--c-text-soft); }
.empty-state .emoji { font-size: 48px; opacity: 0.5; margin-bottom: 12px; }
.empty-state h3 { color: var(--c-dark); font-size: 18px; margin-bottom: 6px; }

/* Progress bar */
.progress { height: 8px; background: var(--c-bg); border-radius: 4px; overflow: hidden; }
.progress > div { height: 100%; background: linear-gradient(90deg, var(--c-primary), var(--c-accent)); border-radius: 4px; transition: width 0.5s; }

/* Pago row */
.pago-row { display: flex; flex-wrap: wrap; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--c-border); align-items: center; }
.pago-row .pago-info { flex: 1 1 150px; min-width: 130px; }
.pago-row .pago-actions { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.pago-num { width: 48px; height: 48px; flex-shrink: 0; background: var(--c-bg); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-weight: 800; color: var(--c-dark); font-family: 'Plus Jakarta Sans'; font-size: 18px; }
.pago-num.is-pagado { background: var(--c-success-bg); color: var(--c-success); }
.pago-num.is-vencido { background: var(--c-danger-bg); color: var(--c-danger); }

/* Botón hamburguesa en la topbar (solo móvil) */
.topbar-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.topbar-left h1 { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-menu {
    display: none; flex-shrink: 0;
    width: 40px; height: 40px;
    background: none; border: 1.5px solid var(--c-border); border-radius: 9px;
    color: var(--c-dark); font-size: 20px; line-height: 1; cursor: pointer;
    align-items: center; justify-content: center;
}
.topbar-menu:active { background: var(--c-bg); }
.sidebar-overlay { display: none; }

/* ===== Sidebar deslizable (drawer) en móvil/tablet ===== */
@media (max-width: 900px) {
    .sidebar {
        position: fixed; top: 0; left: 0; bottom: 0;
        width: 270px; max-width: 84vw; height: 100%;
        transform: translateX(-100%);
        transition: transform 0.28s ease;
        z-index: 300;
    }
    body.admin-menu-open .sidebar { transform: translateX(0); box-shadow: 0 0 50px rgba(0,0,0,0.4); }
    .sidebar-overlay {
        display: block; position: fixed; inset: 0;
        background: rgba(8,12,24,0.5); z-index: 250;
        opacity: 0; pointer-events: none; transition: opacity 0.28s ease;
    }
    body.admin-menu-open .sidebar-overlay { opacity: 1; pointer-events: auto; }
    .main { width: 100%; min-width: 0; }
    .topbar-menu { display: inline-flex; }
    .topbar { padding: 12px 14px; }
    .content { padding: 18px 14px; }
}

/* En pantallas chicas, los grids de detalle (estilos en línea) se apilan a 1 columna */
@media (max-width: 760px) {
    .content [style*="grid-template-columns"] { grid-template-columns: 1fr !important; }

    /* Tablas → tarjetas apiladas (nada se corta, sin scroll horizontal) */
    table.t, table.t tbody, table.t tr, table.t td { display: block; width: 100%; }
    table.t thead { display: none; }
    table.t tr { padding: 12px 2px; border-bottom: 1px solid var(--c-border); }
    table.t tr:last-child { border-bottom: none; }
    table.t td { padding: 4px 0; border: none; text-align: left; }
    table.t td::before {
        content: attr(data-label); display: block;
        font-size: 10.5px; font-weight: 700; text-transform: uppercase;
        letter-spacing: 0.03em; color: var(--c-text-muted); margin-bottom: 1px;
    }
    table.t td[data-label=""]::before, table.t td:not([data-label])::before { display: none; }
    table.t td:empty { display: none; }
    table.t td[style*="text-align:right"], table.t td[style*="text-align: right"] { text-align: left; }
}

@media (max-width: 560px) {
    .topbar-user { display: none; }
}

@media print {
    .sidebar, .topbar, .no-print { display: none !important; }
    body { background: white; }
    .content { padding: 0; }
    .card { box-shadow: none; border: none; }
}

/* Días de clase (cursos y lista de asistencia) */
.dias-presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.dias-check { display: flex; flex-wrap: wrap; gap: 6px; }
.dias-check label { display: inline-flex; align-items: center; gap: 6px; padding: 7px 11px; border: 1.5px solid var(--c-border); border-radius: 999px; font-size: 13px; cursor: pointer; background: white; user-select: none; }
.dias-check label:has(input:checked) { border-color: var(--c-primary); background: var(--c-primary-light); color: var(--c-dark); font-weight: 600; }
.dias-check input { accent-color: var(--c-primary); }