:root {
    --bg: #071019;
    --surface: #0c1a2e;
    --surface2: #112240;
    --border: #1a3050;

    --azul: #2563eb;
    --azul-claro: #60a5fa;
    --verde: #16a34a;
    --verde-claro: #4ade80;
    --rojo: #ef4444;
    --naranja: #f59e0b;

    --texto: #e2e8f0;
    --texto-tenue: #64748b;
    --texto-tenue2: #94a3b8;
}

/* Paletas para gráficos (Chart.js) — alternar azul/verde */
:root {
    --blues-0: #1d4ed8; --blues-1: #2563eb; --blues-2: #3b82f6; --blues-3: #60a5fa;
    --blues-4: #93c5fd; --blues-5: #0ea5e9; --blues-6: #0284c7; --blues-7: #0369a1;
    --greens-0: #15803d; --greens-1: #16a34a; --greens-2: #22c55e; --greens-3: #4ade80;
    --greens-4: #10b981; --greens-5: #059669; --greens-6: #047857; --greens-7: #34d399;
}

* { box-sizing: border-box; }

body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    background: var(--bg);
    color: var(--texto);
}

a { color: var(--azul-claro); }

/* ===================== Header ===================== */
.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
.topbar-brand { font-weight: 700; font-size: 1.1rem; color: var(--texto); }
.topbar-nav { display: flex; align-items: center; gap: 16px; }
.topbar-nav a { color: var(--azul-claro); text-decoration: none; font-weight: 500; }
.topbar-nav a:hover { text-decoration: underline; }
.topbar-user { color: var(--texto-tenue2); font-size: 0.9rem; }

/* ===================== Barra de pestañas (fija al hacer scroll) ===================== */
.tabs-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #0c1a2e;
    border-bottom: 1px solid #1a3050;
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
}
.tabs-nav::-webkit-scrollbar { display: none; }
.tabs-nav a {
    padding: 14px 22px;
    text-transform: uppercase;
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    color: #64748b;
    text-decoration: none;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
    transition: color 0.15s, border-color 0.15s;
}
.tabs-nav a:hover { color: #93c5fd; }
.tabs-nav a.tab-activa {
    color: #60a5fa;
    border-bottom: 3px solid #60a5fa;
}

.container { max-width: 960px; margin: 24px auto; padding: 0 16px; }
.container-ancho { max-width: 1800px; }

/* ===================== Tarjetas ===================== */
.card {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }

/* ===================== KPIs ===================== */
.kpi {
    text-align: center;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-top: 3px solid var(--azul-claro);
    border-radius: 10px;
    padding: 18px 14px;
}
.kpi .icono { display: block; font-size: 22px; margin-bottom: 6px; }
.kpi .valor { font-size: 26px; font-weight: 800; color: var(--texto); line-height: 1.2; }
.kpi .etiqueta {
    color: var(--texto-tenue);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

.progreso-bar {
    background: var(--border);
    border-radius: 999px;
    height: 14px;
    overflow: hidden;
    margin-top: 8px;
}
.progreso-bar-fill {
    background: var(--azul-claro);
    height: 100%;
}

/* ===================== Botones ===================== */
.btn {
    display: inline-block;
    background: var(--azul);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.95rem;
}
.btn:hover { background: #1d4ed8; }
.btn-secondary { background: transparent; color: var(--azul-claro); border: 1px solid var(--azul-claro); }
.btn-secondary:hover { background: rgba(96, 165, 250, 0.1); }
.btn-danger { background: var(--rojo); }
.btn-link { color: var(--azul-claro); text-decoration: none; }

.acciones-grandes { display: flex; gap: 16px; flex-wrap: wrap; }
.accion-grande {
    flex: 1;
    min-width: 220px;
    text-align: center;
    padding: 32px 16px;
    background: var(--surface2);
    border: 2px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    color: var(--texto);
    font-weight: 600;
    font-size: 1.1rem;
}
.accion-grande:hover { border-color: var(--azul-claro); background: var(--surface); }
.accion-grande .icono { font-size: 2.2rem; display: block; margin-bottom: 8px; }

/* ===================== Tablas ===================== */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px; border-bottom: 1px solid var(--border); color: var(--texto); }
th { color: var(--texto-tenue2); font-size: 0.85rem; text-transform: uppercase; }

/* ===================== Badges (fondo translúcido, legible en oscuro) ===================== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
}
.badge-normal { background: rgba(74, 222, 128, 0.15); color: var(--verde-claro); }
.badge-pendiente { background: rgba(245, 158, 11, 0.15); color: var(--naranja); }
.badge-atencion { background: rgba(239, 68, 68, 0.15); color: var(--rojo); }
.badge-aprobado { background: rgba(74, 222, 128, 0.15); color: var(--verde-claro); }
.badge-reprobado { background: rgba(239, 68, 68, 0.15); color: var(--rojo); }

/* ===================== Alertas ===================== */
.alerta {
    padding: 14px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: var(--texto);
}
.alerta-info { background: rgba(96, 165, 250, 0.1); border: 1px solid rgba(96, 165, 250, 0.35); }
.alerta-warning { background: rgba(245, 158, 11, 0.1); border: 1px solid rgba(245, 158, 11, 0.35); }
.alerta-danger { background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.35); }

/* ===================== Formularios ===================== */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; color: var(--texto); }
.form-group input[type=text],
.form-group input[type=date],
.form-group input[type=number],
.form-group input[type=password],
.form-group input[type=file],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    color: var(--texto);
    font-family: Arial, Helvetica, sans-serif;
}
.form-group textarea { min-height: 80px; }
.form-group select option { background: var(--surface); color: var(--texto); }

/* ===================== Grupos de checkboxes/radios (F005 / F001) ===================== */
.opciones-checkbox {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
}
.opciones-checkbox label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 400;
    cursor: pointer;
    white-space: nowrap;
}
.opciones-checkbox input[type="checkbox"],
.opciones-checkbox input[type="radio"] {
    width: 16px;
    height: 16px;
    accent-color: var(--azul-claro);
    cursor: pointer;
}

.seccion-titulo {
    font-weight: 700;
    color: var(--azul-claro);
    margin: 24px 0 12px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--border);
}

.pregunta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    gap: 12px;
}
.pregunta-row .texto { flex: 1; }
.pregunta-opciones { display: flex; gap: 16px; white-space: nowrap; }
.pregunta-opciones label { font-weight: 400; display: flex; align-items: center; gap: 4px; cursor: pointer; }

.login-box {
    max-width: 380px;
    margin: 80px auto;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
}
.login-box h1 { font-size: 1.3rem; margin-bottom: 24px; color: var(--texto); }

.search-box {
    width: 100%;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--texto);
    font-family: Arial, Helvetica, sans-serif;
}

.lista-conductores { list-style: none; padding: 0; margin: 0; }
.lista-conductores li { border-bottom: 1px solid var(--border); }
.lista-conductores a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 8px;
    text-decoration: none;
    color: var(--texto);
}
.lista-conductores a:hover { background: var(--surface); }

.texto-tenue { color: var(--texto-tenue2); font-size: 0.9rem; }

.vista-previa-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    align-items: center;
}

/* ===================== Contenedor de gráficos Chart.js ===================== */
.grafico-caja { position: relative; }
.grafico-caja canvas { max-width: 100%; }

/* ===================== Tarjetas compactas de Colisiones ===================== */
.vcard-colision {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 8px;
}
.vcard-detalle {
    margin-top: 4px;
    font-size: 0.8rem;
    max-height: 2.6em;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.btn-ver-mas { margin-top: 8px; }

/* ===================== Modal de detalle de colisión ===================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.modal-overlay.abierto { display: flex; }
.modal-caja {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    max-width: 520px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
}
.modal-cerrar {
    position: absolute;
    top: 14px;
    right: 16px;
    background: none;
    border: none;
    color: var(--texto-tenue2);
    font-size: 1.4rem;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
}
.modal-cerrar:hover { color: var(--texto); }

/* ===================== Tabla compacta con scroll horizontal (reporte de Evaluaciones) ===================== */
.tabla-scroll {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 8px;
    border: 1px solid var(--border);
    box-sizing: border-box;
}
.tabla-compacta {
    width: auto;
    min-width: 100%;
    white-space: nowrap;
}
.tabla-compacta th,
.tabla-compacta td {
    padding: 8px 10px;
    font-size: 0.82rem;
    white-space: nowrap;
}
.tabla-compacta th {
    font-size: 0.72rem;
    line-height: 1.3;
    vertical-align: bottom;
}
.tabla-compacta .celda-nombre {
    white-space: nowrap;
    font-weight: 600;
}
.tabla-compacta tbody tr {
    vertical-align: middle;
}
.tabla-compacta tbody tr:hover {
    background: rgba(96, 165, 250, 0.06);
}
.tabla-compacta .celda-accion a {
    white-space: nowrap;
}

/* ===================== Responsivo (celular) ===================== */
@media (max-width: 700px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 12px 16px;
    }
    .topbar-nav {
        width: 100%;
        flex-wrap: wrap;
        gap: 10px 16px;
        font-size: 0.9rem;
    }
    .topbar-user { order: 99; width: 100%; }

    .tabs-nav a { padding: 12px 14px; font-size: 0.72rem; }

    .container { margin: 14px auto; padding: 0 12px; }
    .card { padding: 14px; margin-bottom: 14px; }

    .card-grid, .vista-previa-grid { grid-template-columns: 1fr; }

    .acciones-grandes { flex-direction: column; }
    .accion-grande { padding: 22px 16px; }

    .pregunta-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 14px 0;
    }
    .pregunta-opciones {
        white-space: normal;
        flex-wrap: wrap;
        width: 100%;
        gap: 10px 16px;
    }

    /* Tablas: en vez de romper el layout, se hacen scrolleables horizontalmente */
    table { display: block; overflow-x: auto; white-space: nowrap; }

    .login-box { margin: 40px auto; padding: 24px; max-width: 92vw; }

    .btn, .btn-secondary { width: 100%; text-align: center; }
    .acciones-grandes .accion-grande { width: 100%; }

    h2 { font-size: 1.2rem; }
}