/* ============================================
   Calculadora de Notas Estudiantiles - Estilos
   ============================================ */

/* --- Base --- */
body {
    min-height: 100vh;
    transition: background-color 0.3s ease;
}

/* --- Cards --- */
.card {
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.card-header {
    border-radius: 1rem 1rem 0 0 !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Form Controls --- */
.form-control:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.25);
}

.form-control:disabled {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
}

.form-control-lg {
    font-size: 1.5rem;
    padding: 0.75rem 1rem;
}

/* --- Resultado --- */
#textoLetra {
    font-size: 5rem;
    line-height: 1;
    transition: color 0.3s ease, font-size 0.3s ease;
}

/* --- Botones --- */
.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.25rem;
}

.btn {
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

/* --- Form Switch --- */
.form-check-input:checked {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

/* --- Header --- */
h1.h3 {
    font-weight: 600;
}

/* --- Footer --- */
footer {
    padding: 1rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Responsive --- */
@media (max-width: 991.98px) {
    #textoLetra {
        font-size: 4rem;
    }
    
    .form-control-lg {
        font-size: 1.25rem;
        padding: 0.5rem 0.75rem;
    }
}

@media (max-width: 575.98px) {
    #textoLetra {
        font-size: 3rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn-lg {
        padding: 0.5rem 1.5rem;
        font-size: 1rem;
    }
    
    .container.py-4 {
        padding-top: 1rem !important;
        padding-bottom: 1rem !important;
    }
}

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

#resultado {
    animation: fadeIn 0.3s ease;
}

/* --- Toast --- */
.toast {
    border-radius: 0.5rem;
}

.toast-container {
    z-index: 1050;
}