* {
    box-sizing: border-box;
}

/* ===== BODY ===== */
body.bg-custom {
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
    background: url('/assets/img/itech.jpg') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    padding-top: 90px;
    color: #1a1a1a;
}

/* ===== CONTENEDOR PRINCIPAL ===== */
.main-container {
    max-width: 900px;
    margin: auto;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 8px 25px rgba(0,0,0,.25);
    border-radius: 20px;
    padding-bottom: 30px;
}

/* ===== HEADER ===== */
.header {
    background: linear-gradient(135deg, #003d82, #1b396a);
    color: #fff;
    padding: 40px;
    border-bottom: 4px solid #c8102e;
    border-radius: 20px 20px 0 0;
}

.header h1, 
.header h2, 
.header h3, 
.header h4 {
    margin-bottom: 10px;
}

/* ===== NAVBAR ===== */
.navbar {
    box-shadow: 0 4px 10px rgba(0,0,0,.25);
    border-bottom: 4px solid #c8102e;
}

.navbar-brand {
    font-weight: 600;
    font-size: 18px;
    margin-left: 10px;
}

/* ===== FORMULARIOS ===== */
form {
    padding: 25px;
}

.form-label {
    font-weight: 500;
}

.form-select:focus,
.form-control:focus {
    border-color: #003d82;
    box-shadow: 0 0 0 0.2rem rgba(0,61,130,.25);
}

/* ===== BOTONES ===== */
.btn-primary {
    background-color: #003d82;
    border-color: #003d82;
}

.btn-primary:hover {
    background-color: #002c5c;
    border-color: #002c5c;
}

/* ===== TARJETAS DEL MENÚ ===== */
.card-area {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px 20px;
    text-align: center;
    transition: 0.3s ease-in-out;
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

.card-area:hover {
    transform: translateY(-6px) scale(1.03);
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
}

.card-area i {
    font-size: 50px;
    color: #c8102e;
    margin-bottom: 15px;
}

.card-area h5 {
    font-weight: 600;
    color: #1b396a;
}
.card-link {
    text-decoration: none;
}

/* ===== ACCESIBILIDAD ===== */
.card-link:focus .card-area {
    outline: 3px solid #c8102e;
    outline-offset: 4px;
}

/* ===== FOOTER ===== */
.footer {
    margin-top: 40px;
    padding: 20px;
    /*background: #1b396a;*/
    background: #c8102e;
    color: #fff;
    text-align: center;
    font-size: 14px;
}

.footer small {
    opacity: 0.8;
}

/* ===== RESPONSIVE ===== */
@media (max-width:768px){
    .header {
        padding: 25px;
        text-align: center;
    }

    .header h1 {
        font-size: 20px;
    }

    .header h4 {
        font-size: 16px;
    }
}

.content {
    padding: 40px;
}

@media (max-width:768px){
    .content {
        padding: 20px;
    }
}
@media print {

    body * {
        visibility: hidden;
    }

    #areaImpresion, 
    #areaImpresion * {
        visibility: visible;
    }

    #areaImpresion {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
    }

    .btn, 
    .navbar {
        display: none !important;
    }

    body {
        background: white !important;
    }
}