:root {
    --sub-primary: #1a73e8;
    --sub-primary-hover: #1557b0;
    --sub-bg: #fdfdfd;
    --sub-white: #ffffff;
    --sub-border: #dadce0;
    --sub-text: #202124;
    --sub-text-muted: #5f6368;
    --sub-success: #1e8e3e;
    --sub-error: #d93025;
}

.sub-checkout-wrapper {
    max-width: 850px;
    margin: 2rem auto;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    color: var(--sub-text);
    line-height: 1.5;
}

/* Stepper Indicator */
.sub-stepper {
    display: flex;
    justify-content: center;
    /* Centrado */
    gap: 4rem;
    margin-bottom: 3rem;
    position: relative;
}

@media (max-width: 600px) {
    .sub-stepper {
        gap: 1.5rem;
    }

    .sub-step-label {
        display: none;
    }
}

.sub-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    position: relative;
    z-index: 2;
}

.sub-step .step-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--sub-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--sub-text-muted);
    transition: all 0.3s ease;
}

.sub-step.active .step-number {
    background: var(--sub-primary);
    border-color: var(--sub-primary);
    color: white;
    box-shadow: 0 4px 10px rgba(26, 115, 232, 0.3);
}

.sub-step .step-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--sub-text-muted);
}

.sub-step.active .step-label {
    color: var(--sub-primary);
    font-weight: 600;
}

/* Card Container */
.sub-card {
    background: var(--sub-white);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
}

.sub-step-content {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.sub-step-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Form Elements */
.sub-form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .sub-form-grid {
        grid-template-columns: 1fr;
    }

    .sub-form-group.sub-full-width {
        grid-column: span 1;
    }
}

.sub-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sub-form-group.sub-full-width {
    grid-column: span 2;
}

.sub-form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--sub-text);
}

.sub-form-group input,
.sub-form-group select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--sub-border);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.sub-form-group input:focus,
.sub-form-group select:focus {
    outline: none;
    border-color: var(--sub-primary);
    box-shadow: 0 0 0 1px var(--sub-primary);
}

/* Sections */
.form-section h4 {
    margin: 0 0 1.5rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
    color: var(--sub-primary);
    font-size: 1.1rem;
}

.mt-4 {
    margin-top: 2rem;
}

.text-center {
    text-align: center;
}

/* Buttons */
.sub-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

s .sub-btn {
    padding: 0.75rem 2rem;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    border: none;
    font-size: 1rem;
}

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

.sub-btn-primary:hover {
    background: var(--sub-primary-hover);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.sub-btn-outline {
    background: transparent;
    border: 1px solid var(--sub-border);
    color: var(--sub-text-muted);
}

.sub-btn-outline:hover {
    background: #f8f9fa;
}

/* Success Message */
.sub-success-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
}

.sub-success-icon {
    width: 64px;
    height: 64px;
    background: var(--sub-success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.sub-success-icon svg {
    width: 32px;
}

/* Helper Text */
.sub-help-text {
    color: var(--sub-text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}