body {
    background-color: #FFFFFF;
    color: #414141;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.checkout-card {
    background: #ffffff;
    border: 1px solid #f3f4f6;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    padding: 2rem 1.75rem;
}

.form-group {
    margin-bottom: 1.75rem;
}

.form-label {
    display: block;
    font-weight: 800;
    font-size: 0.95rem;
    color: #1f2937;
    margin-bottom: 0.75rem;
}

/* Selección Sí / No */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    background: #f8fafc;
    border: 1.5px solid #e5e7eb;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    color: #374151;
    transition: all 0.2s ease;
}

.radio-option:hover {
    border-color: #0077b6;
}

.radio-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-fake {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid #9ca3af;
    flex-shrink: 0;
    position: relative;
    transition: all 0.2s ease;
}

.radio-option input:checked ~ .radio-fake {
    border-color: #0077b6;
    background: #0077b6;
    box-shadow: inset 0 0 0 3px #ffffff;
}

.radio-option:has(input:checked) {
    border-color: #0077b6;
    background: #eef8fd;
    color: #0077b6;
}

.radio-option-checked {
    border-color: #0077b6 !important;
    background: #eef8fd !important;
    color: #0077b6 !important;
}

/* Selects */
.select-field {
    width: 100%;
    background: #f8fafc;
    border: 1.5px solid #e5e7eb;
    border-radius: 10px;
    padding: 0.85rem 1rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: #374151;
    cursor: pointer;
    transition: all 0.2s ease;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='3'><polyline points='6 9 12 15 18 9'/></svg>");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

.select-field:focus {
    outline: none;
    border-color: #0077b6;
    background-color: #eef8fd;
}

.field-error {
    color: #D03534;
    font-size: 0.75rem;
    font-weight: 700;
    margin-top: 0.5rem;
}

/* Selección múltiple de países (casillas cuadradas) */
.country-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
}

@media (min-width: 480px) {
    .country-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.country-chip {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    background: #f8fafc;
    border: 1.5px solid #e5e7eb;
    border-radius: 10px;
    padding: 0.7rem 0.85rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    color: #374151;
    transition: all 0.2s ease;
}

.country-chip:hover {
    border-color: #0077b6;
}

.country-chip input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-fake {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    border-radius: 6px;
    border: 2px solid #9ca3af;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 11px;
    transition: all 0.2s ease;
}

.checkbox-fake i {
    opacity: 0;
    transform: scale(0.6);
    transition: all 0.15s ease;
}

.country-chip input:checked ~ .checkbox-fake {
    background: #0077b6;
    border-color: #0077b6;
}

.country-chip input:checked ~ .checkbox-fake i {
    opacity: 1;
    transform: scale(1);
}

.country-chip:has(input:checked) {
    border-color: #0077b6;
    background: #eef8fd;
    color: #0077b6;
}

.country-chip-checked {
    border-color: #0077b6 !important;
    background: #eef8fd !important;
    color: #0077b6 !important;
}

.country-label {
    line-height: 1.2;
}

/* Botón de pago (mismo estilo que la web principal) */
.buy-btn {
    background-color: #0D8203;
    color: white;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(13, 130, 3, 0.25);
    border-radius: 4px;
}

.buy-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
    box-shadow: 0 12px 25px rgba(13, 130, 3, 0.35);
}

.buy-btn.disabled-btn {
    opacity: 0.6;
    cursor: not-allowed;
}

.buy-btn.disabled-btn:hover {
    transform: none;
    filter: none;
    box-shadow: 0 8px 20px rgba(13, 130, 3, 0.25);
}

.hidden {
    display: none !important;
}