/* ===================================================
   VARIABLES DE COLOR Y TEMAS
   =================================================== */
:root {
    --bg-main: #f1f5f9;
    --bg-card: #ffffff;
    --bg-nav: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --secondary: #64748b;
    --input-bg: #f8fafc;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.08);
}

[data-theme="dark"] {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-nav: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --primary: #818cf8;
    --primary-hover: #6366f1;
    --primary-light: #312e81;
    --input-bg: #0f172a;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    padding-bottom: 50px;
}

kbd {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.75rem;
    color: var(--primary);
}

/* ===================================================
   BARRA SUPERIOR (NAVBAR)
   =================================================== */
.top-nav {
    background-color: var(--bg-nav);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    gap: 15px;
}

.logo-area h2 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.nav-item {
    background: transparent;
    border: none;
    padding: 8px 16px;
    border-radius: 10px;
    color: var(--text-muted);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.88rem;
}

    .nav-item:hover {
        background-color: var(--primary-light);
        color: var(--primary);
    }

    .nav-item.active {
        background-color: var(--primary);
        color: #ffffff;
    }

/* ===================================================
   ESTRUCTURA PRINCIPAL Y CONTENEDOR
   =================================================== */
.main-container {
    max-width: 1180px;
    margin: 28px auto;
    padding: 0 20px;
}

/* ===================================================
   TARJETAS Y GRIDS
   =================================================== */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 20px;
}

    .card h3 {
        margin-bottom: 16px;
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--text-main);
    }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.grid-cards-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ===================================================
   KPIS DASHBOARD
   =================================================== */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.kpi-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-md);
}

    .kpi-card h3 {
        font-size: 0.88rem;
        color: var(--text-muted);
        margin-bottom: 8px;
        font-weight: 600;
    }

.kpi-value {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--primary);
}

.chart-container {
    position: relative;
    height: 280px;
    width: 100%;
}

/* ===================================================
   FORMULARIOS E INPUTS
   =================================================== */
.form-group {
    margin-bottom: 16px;
}

    .form-group label {
        display: block;
        font-size: 0.85rem;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--text-main);
    }

input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-main);
    font-size: 0.92rem;
    outline: none;
}

    input:focus, select:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    }

/* ===================================================
   BOTONES
   =================================================== */
.btn {
    padding: 10px 18px;
    border-radius: 10px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
}

    .btn-primary:hover {
        background-color: var(--primary-hover);
    }

.btn-success {
    background-color: var(--success);
    color: #ffffff;
}

    .btn-success:hover {
        background-color: var(--success-hover);
    }

.btn-danger {
    background-color: var(--danger);
    color: #ffffff;
}

    .btn-danger:hover {
        background-color: var(--danger-hover);
    }

.btn-secondary {
    background-color: var(--secondary);
    color: #ffffff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 8px;
    width: auto;
}

/* ===================================================
   TABLAS Y ETIQUETAS (BADGES)
   =================================================== */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

    .table th, .table td {
        padding: 12px 14px;
        text-align: left;
        border-bottom: 1px solid var(--border-color);
        font-size: 0.88rem;
    }

    .table th {
        background-color: var(--input-bg);
        color: var(--text-muted);
        font-weight: 700;
    }

.badge-modulo {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
}

.badge-est {
    background-color: #e0e7ff;
    color: #4338ca;
}

.badge-bus {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-meca {
    background-color: #fef3c7;
    color: #92400e;
}