:root {
    --primary-color: #0056b3;
    --primary-hover: #003d82;
    --accent-color: #28a745;
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --border-color: #e0e0e0;
}
.form-container {
    background: var(--card-bg);
    width: 100%;
    max-width: 800px;
    
    /* Centrado horizontal tradicional */
    margin: 40px auto; 
    
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}
.form-header {
    text-align: center;
    margin-bottom: 30px;
}

.form-header h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.form-header p {
    color: var(--text-muted);
}

.promo-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Grilla de Tarjetas de Planes */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 10px;
}

/* Tarjeta individual */
.plan-card {
    position: relative;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 20px 15px;
    cursor: pointer;
    transition: all 0.25s ease;
    background-color: #fafafa;
}

/* Ocultar el radio button por defecto */
.plan-card input[type="radio"] {
    position: absolute;
    opacity: 0;
}

/* Estado al pasar el mouse */
.plan-card:hover {
    border-color: var(--primary-color);
}

/* Estado Seleccionado (Checked) */
.plan-card:has(input[type="radio"]:checked) {
    border-color: var(--primary-color);
    background-color: #f0f7ff;
    box-shadow: 0 4px 12px rgba(0, 86, 179, 0.15);
}

.card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.plan-badge {
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

.badge-popular {
    background-color: var(--accent-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    margin-bottom: 8px;
}

.plan-price {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.plan-price span {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: normal;
}

.plan-features {
    list-style: none;
    font-size: 0.82rem;
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-align: left;
    width: 100%;
}

/* Campos de Formulario */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-color);
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.input-group input:focus,
.input-group textarea:focus {
    border-color: var(--primary-color);
}

.btn-submit {
    background-color: var(--primary-color);
    color: white;
    padding: 14px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s ease;
    margin-top: 10px;
}

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

/* Responsivo para Móviles */
@media (max-width: 720px) {
    .plans-grid {
        grid-template-columns: 1fr;
    }
    .grid-2 {
        grid-template-columns: 1fr;
    }
    .form-container {
        padding: 20px;
    }
}