.dksign-newsletter {
    --newsletter-bg: var(--color-surface, #f5f5f5);
    --newsletter-border: var(--color-border, #e0e0e0);
    --newsletter-text: var(--color-text, #1a1a1a);
    --newsletter-text-secondary: var(--color-text-secondary, #666);
    --newsletter-button-bg: var(--color-primary, #1a1a1a);
    --newsletter-button-text: var(--color-primary-contrast, #ffffff);
    --newsletter-radius: 4px;
    --newsletter-spacing: 24px;
    
    background: var(--newsletter-bg);
    padding: var(--newsletter-spacing);
    border-radius: var(--newsletter-radius);
}

.dksign-newsletter__header {
    margin-bottom: 20px;
}

.dksign-newsletter__title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 8px 0;
    color: var(--newsletter-text);
}

.dksign-newsletter__description {
    font-size: 0.9375rem;
    color: var(--newsletter-text-secondary);
    margin: 0;
    line-height: 1.5;
}

.dksign-newsletter__fields {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.dksign-newsletter__input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--newsletter-border);
    border-radius: var(--newsletter-radius);
    font-size: 1rem;
    background: #fff;
    color: var(--newsletter-text);
    transition: border-color 0.2s ease;
}

.dksign-newsletter__input:focus {
    outline: none;
    border-color: var(--newsletter-text);
}

.dksign-newsletter__input::placeholder {
    color: #999;
}

.dksign-newsletter__button {
    padding: 12px 24px;
    background: var(--newsletter-button-bg);
    color: var(--newsletter-button-text);
    border: none;
    border-radius: var(--newsletter-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s ease;
    white-space: nowrap;
}

.dksign-newsletter__button:hover {
    opacity: 0.9;
}

.dksign-newsletter__button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.dksign-newsletter__privacy {
    font-size: 0.8125rem;
    color: var(--newsletter-text-secondary);
    margin: 0;
}

.dksign-newsletter__message {
    padding: 12px 16px;
    border-radius: var(--newsletter-radius);
    margin-top: 16px;
    font-size: 0.9375rem;
}

.dksign-newsletter__message--success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.dksign-newsletter__message--error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Stacked layout */
.dksign-newsletter--stacked .dksign-newsletter__fields {
    flex-direction: column;
}

.dksign-newsletter--stacked .dksign-newsletter__button {
    width: 100%;
}

/* Compact layout */
.dksign-newsletter--compact {
    --newsletter-spacing: 16px;
}

.dksign-newsletter--compact .dksign-newsletter__title {
    font-size: 1.125rem;
}

.dksign-newsletter--compact .dksign-newsletter__description {
    font-size: 0.875rem;
}

.dksign-newsletter--compact .dksign-newsletter__input,
.dksign-newsletter--compact .dksign-newsletter__button {
    padding: 10px 14px;
    font-size: 0.9375rem;
}

/* Footer placement */
.site-footer .dksign-newsletter {
    background: transparent;
    padding: 0;
}

.site-footer .dksign-newsletter__title {
    font-size: 1rem;
    margin-bottom: 4px;
}

.site-footer .dksign-newsletter__description {
    font-size: 0.875rem;
}

/* Loading state */
.dksign-newsletter__button--loading {
    position: relative;
    color: transparent !important;
}

.dksign-newsletter__button--loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: dksign-spinner 0.8s linear infinite;
}

@keyframes dksign-spinner {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 480px) {
    .dksign-newsletter--inline .dksign-newsletter__fields {
        flex-direction: column;
    }
    
    .dksign-newsletter--inline .dksign-newsletter__button {
        width: 100%;
    }
}