/* Estilos Comunes para Todo el Sitio */
@import url('https://fonts.googleapis.com/css2?family=Lora:wght@400;600&family=Open+Sans:wght@300;400;600&display=swap');

/* Fondo principal metálico gris */
body {
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #e8e8e8 0%, #d4d4d4 20%, #c0c0c0 40%, #a8a8a8 60%, #909090 80%, #787878 100%);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    position: relative;
    color: #2c3e50;
}

/* Patrón metálico sutil */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(45deg, rgba(192, 192, 192, 0.06) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(169, 169, 169, 0.05) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(184, 184, 184, 0.04) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(211, 211, 211, 0.03) 75%);
    background-size: 40px 40px;
    background-position: 0 0, 0 20px, 20px -20px, -20px 0px;
    z-index: -1;
    pointer-events: none;
}

/* Títulos principales */
.seccion-titulo {
    text-align: center;
    font-family: 'Lora', serif;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 4px rgba(255, 255, 255, 0.3);
}

/* Tarjetas metálicas estándar */
.tarjeta-metalica {
    background: linear-gradient(145deg, 
        rgba(248, 248, 248, 0.95) 0%, 
        rgba(240, 240, 240, 0.9) 30%,
        rgba(232, 232, 232, 0.85) 60%,
        rgba(224, 224, 224, 0.8) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.08),
        0 0 0 1px rgba(255, 255, 255, 0.3) inset,
        inset 0 0 30px rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(192, 192, 192, 0.2);
    padding: 30px;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

/* Efecto de brillo metálico */
.tarjeta-metalica::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 40%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(192, 192, 192, 0.06) 60%,
        transparent 70%
    );
    animation: metallicShimmer 6s ease-in-out infinite;
    z-index: -1;
}

@keyframes metallicShimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    50% { transform: translateX(100%) translateY(100%) rotate(45deg); }
    100% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
}

/* Botones estándar */
.boton-estandar {
    background: linear-gradient(135deg, #6c757d, #495057);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.boton-estandar:hover {
    background: linear-gradient(135deg, #495057, #343a40);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Botones dorados especiales */
.boton-dorado {
    background: linear-gradient(135deg, #d4af37, #f4e4bc);
    color: #2c3e50;
}

.boton-dorado:hover {
    background: linear-gradient(135deg, #f4e4bc, #d4af37);
}

/* Formularios */
.form-control {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(192, 192, 192, 0.3);
    border-radius: 8px;
    padding: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #d4af37;
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
    background: rgba(255, 255, 255, 0.95);
}

/* Tablas */
.tabla-estandar {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.tabla-estandar th {
    background: linear-gradient(135deg, #6c757d, #495057);
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.tabla-estandar td {
    padding: 12px 15px;
    border-bottom: 1px solid rgba(192, 192, 192, 0.2);
}

.tabla-estandar tr:hover {
    background: rgba(108, 117, 125, 0.05);
}

/* Alertas y mensajes */
.alerta {
    padding: 15px 20px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 4px solid;
}

.alerta-exito {
    background: rgba(40, 167, 69, 0.1);
    border-left-color: #28a745;
    color: #155724;
}

.alerta-error {
    background: rgba(220, 53, 69, 0.1);
    border-left-color: #dc3545;
    color: #721c24;
}

.alerta-info {
    background: rgba(23, 162, 184, 0.1);
    border-left-color: #17a2b8;
    color: #0c5460;
}

/* Modal */
.modal {
    background: linear-gradient(145deg, 
        rgba(248, 248, 248, 0.98) 0%, 
        rgba(240, 240, 240, 0.95) 100%);
    border-radius: 16px;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    border: 1px solid rgba(192, 192, 192, 0.2);
}

.modal-header {
    background: linear-gradient(135deg, #6c757d, #495057);
    color: white;
    padding: 20px;
    border-radius: 16px 16px 0 0;
    margin: -20px -20px 20px -20px;
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Responsive mejorado */
@media (max-width: 1024px) {
    .seccion-titulo {
        font-size: 2rem;
    }
    
    .tarjeta-metalica {
        padding: 25px;
        margin: 10px;
    }
    
    .boton-estandar {
        padding: 11px 22px;
        font-size: 15px;
    }
}

@media (max-width: 768px) {
    body {
        background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 50%, #d4d4d4 100%);
    }
    
    .seccion-titulo {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .tarjeta-metalica {
        padding: 20px;
        margin: 8px;
        border-radius: 16px;
        box-shadow: 
            0 15px 30px rgba(0, 0, 0, 0.06),
            0 0 0 1px rgba(255, 255, 255, 0.3) inset,
            inset 0 0 20px rgba(255, 255, 255, 0.15);
    }
    
    .boton-estandar {
        padding: 12px 20px;
        font-size: 14px;
        min-height: 44px;
    }
    
    .form-control {
        font-size: 16px;
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .seccion-titulo {
        font-size: 1.6rem;
    }
    
    .tarjeta-metalica {
        padding: 15px;
        margin: 5px;
        border-radius: 12px;
    }
    
    .boton-estandar {
        padding: 10px 18px;
        font-size: 13px;
    }
}