:root {
    --primary-color: #0f172a; /* Azul muy oscuro/metálico */
    --accent-color: #f59e0b;  /* Naranjo/Amarillo industrial */
    --accent-hover: #d97706;
    --bg-color: #f1f5f9;      /* Gris claro fondo */
    --surface-color: #ffffff; /* Blanco contenedores */
    --text-main: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --radius: 8px;
    --transition: all 0.3s ease;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Roboto', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

/* Sidebar / Navbar */
.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.brand {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand span {
    color: var(--accent-color);
}

.nav-links button {
    background: transparent;
    border: none;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    margin-left: 1rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.nav-links button:hover, .nav-links button.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
}

/* Layout Main */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Tarjetas y Secciones */
.card {
    background: var(--surface-color);
    border-radius: var(--radius);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    padding: 2rem;
    margin-bottom: 2rem;
    border-top: 4px solid var(--primary-color);
}

.card h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    border-bottom: 2px solid var(--bg-color);
    padding-bottom: 0.5rem;
}

/* Formularios */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-group input, .form-group select, .form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

/* Botones */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn:hover {
    background-color: #1e293b;
    transform: translateY(-1px);
}

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

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

.btn.danger {
    background-color: #ef4444;
}

.btn.danger:hover {
    background-color: #dc2626;
}

/* Tablas */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-color);
    font-weight: 600;
    color: var(--primary-color);
}

tbody tr:hover {
    background-color: rgba(241, 245, 249, 0.5);
}

/* Vista Ocultar/Mostrar Secciones */
.view-section {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================================= */
/* ESTILOS PARA IMPRESIÓN (PDF) */
/* ========================================================= */
.print-only {
    display: none;
}

@media print {
    body {
        background-color: white;
        margin: 0;
        padding: 0;
        font-size: 12pt;
    }
    
    .navbar, .btn, .no-print {
        display: none !important;
    }

    .container {
        margin: 0;
        padding: 0;
        width: 100%;
        max-width: 100%;
    }

    .card {
        box-shadow: none;
        border: none;
        padding: 0;
        margin: 0;
    }

    .print-only {
        display: block;
    }

    /* Cabecera Impresión */
    .print-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 4px solid var(--primary-color);
        padding-bottom: 1rem;
        margin-bottom: 1rem;
    }

    .print-logo {
        font-size: 2rem;
        font-weight: 800;
        color: var(--primary-color);
    }
    .print-logo span {
        color: var(--accent-color);
    }

    .col-print {
        page-break-inside: avoid;
    }

    table th {
        background-color: var(--primary-color) !important;
        color: white !important;
        -webkit-print-color-adjust: exact;
    }
}