:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
}


.checkout-container {
    background-color: var(--card-bg);
    max-width: 900px;
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin: auto;
    color: #000;
}

/* Sección del Formulario */
.form-section {
    padding: 40px;
    border-right: 1px solid var(--border-color);
}

.form-section h2 {
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 500;
}

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

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

.file-upload {
    margin-top: 10px;
}

/* Sección del QR */
.qr-section {
    padding: 40px;
    background-color: #f8fafc;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.qr-section h3 {
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.qr-box {
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

.qr-box img {
    width: 200px;
    height: 200px;
    display: block;
}

.instructions {
    text-align: left;
    width: 100%;
    margin-bottom: 25px;
}

.instructions p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

/* Diseño Responsivo para Móviles */
@media (max-width: 768px) {
    .checkout-container {
        grid-template-columns: 1fr;
    }
    .form-section {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}