/* Estilos personalizados */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --warning-color: #ffc107;
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

.bg-gradient {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.min-vh-75 {
    min-height: 75vh;
}

.card {
    border-radius: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    transform: translateY(-2px);
}

.btn {
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0056b3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, var(--primary-color));
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.form-label {
    font-weight: 600;
    color: #495057;
}

.audio-controls {
    margin: 20px 0;
}

#playAudioBtn {
    border-radius: 25px;
    padding: 10px 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

#playAudioBtn:hover {
    transform: scale(1.05);
}

.modal-content {
    border-radius: 15px;
    border: none;
}

.modal-header {
    border-radius: 15px 15px 0 0;
}

/* Animações */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsividade */
@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
    
    .card {
        margin-top: 2rem;
    }
}

/* Loading state */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}