:root {
    --primary-color: #e63946;
    --primary-dark: #c1121f;
    --secondary-color: #1d3557;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-color: #6c757d;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f8f9fa;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: none;
    overflow: hidden;
    transition: var(--transition);
}

.card-body {
    padding: 2.5rem;
}

.form-label {
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    display: block;
    text-align: left;
}

.form-control, .form-select {
    padding: 0.75rem 1rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: #f8f9fa;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.2);
    outline: none;
    background-color: white;
}

.btn {
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(230, 57, 70, 0.3);
}

#valor-cards label.btn {
    border-radius: 12px;
    white-space: normal;
}

#valor-cards input.btn-check:checked + label {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.form-group {
    margin-bottom: 1.5rem;
}

.section-heading {
    text-align: center;
    margin-bottom: 2rem;
}

.section-heading h2 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.section-heading p {
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

.alert-success {
    display: none;
}

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

.animate-fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

@media (max-width: 768px) {
    .card-body {
        padding: 1.5rem;
    }

    .btn {
        width: 100%;
        padding: 0.9rem;
    }

    #valor-cards .col-md-4 {
        margin-bottom: 0.5rem;
    }
}