.ds-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--ds-space-2);
    padding: 0 var(--ds-space-4);
    height: var(--ds-btn-h-md);
    border-radius: var(--ds-radius-md);
    font-size: var(--ds-text-sm);
    font-weight: var(--ds-font-semibold);
    font-family: var(--ds-font-family);
    letter-spacing: 0.01em;
    line-height: 1;
    cursor: pointer;
    border: none;
    text-decoration: none;
    white-space: nowrap;
    transition:
        background var(--ds-transition-base),
        color var(--ds-transition-base),
        box-shadow var(--ds-transition-base),
        transform var(--ds-transition-spring-fast),
        border-color var(--ds-transition-base),
        opacity var(--ds-transition-base);
    -webkit-user-select: none;
    user-select: none;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

.ds-btn:focus-visible {
    outline: 2px solid var(--ds-color-primary);
    outline-offset: 2px;
    box-shadow: none;
}

.ds-btn:active:not(:disabled) {
    transform: scale(0.96);
}

.ds-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.ds-btn--sm {
    height: var(--ds-btn-h-sm);
    padding: 0 var(--ds-space-3);
    font-size: var(--ds-text-xs);
    border-radius: var(--ds-radius-sm);
    gap: var(--ds-space-1);
}

.ds-btn--lg {
    height: var(--ds-btn-h-lg);
    padding: 0 var(--ds-space-6);
    font-size: var(--ds-text-base);
    border-radius: var(--ds-radius-lg);
}

.ds-btn--full {
    width: 100%;
}

.ds-btn--pill {
    border-radius: var(--ds-radius-full);
}

.ds-btn--icon {
    width: var(--ds-btn-h-md);
    padding: 0;
}

.ds-btn--icon.ds-btn--sm {
    width: var(--ds-btn-h-sm);
}

.ds-btn--icon.ds-btn--lg {
    width: var(--ds-btn-h-lg);
}

.ds-btn--primary {
    background: var(--ds-color-primary);
    background-image: linear-gradient(160deg, rgba(255, 255, 255, 0.14) 0%, transparent 55%);
    color: var(--ds-color-text-inverse);
    box-shadow: var(--ds-shadow-brand);
    letter-spacing: -0.01em;
}

.ds-btn--primary:hover:not(:disabled) {
    background: var(--ds-color-primary-hover);
    background-image: linear-gradient(160deg, rgba(255, 255, 255, 0.14) 0%, transparent 55%);
    box-shadow: var(--ds-shadow-brand-hover);
    transform: translateY(-1px);
}

.ds-btn--secondary {
    background: var(--ds-color-surface);
    color: var(--ds-color-primary);
    border: 1.5px solid var(--ds-color-border-input);
    box-shadow: var(--ds-shadow-xs);
    letter-spacing: -0.01em;
}

.ds-btn--secondary:hover:not(:disabled) {
    background: var(--ds-color-primary-subtle);
    border-color: var(--ds-color-primary);
    box-shadow: var(--ds-shadow-sm);
}

.ds-btn--ghost {
    background: transparent;
    color: var(--ds-color-text-secondary);
    border: 1.5px solid var(--ds-color-border);
}

.ds-btn--ghost:hover:not(:disabled) {
    background: var(--ds-color-surface-raised);
    color: var(--ds-color-text-primary);
    border-color: var(--ds-color-border-strong);
}

.ds-btn--outline {
    background: transparent;
    color: var(--ds-color-primary);
    border: 1.5px solid var(--ds-color-primary-border);
    letter-spacing: -0.01em;
}

.ds-btn--outline:hover:not(:disabled) {
    background: var(--ds-color-primary-muted);
    border-color: var(--ds-color-primary);
}

.ds-btn--danger {
    background: var(--ds-color-danger);
    color: var(--ds-color-text-inverse);
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.22);
}

.ds-btn--danger:hover:not(:disabled) {
    background: var(--ds-color-danger-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.3);
}

.ds-btn--success {
    background: var(--ds-color-success);
    color: var(--ds-color-text-inverse);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.22);
}

.ds-btn--success:hover:not(:disabled) {
    opacity: 0.88;
    transform: translateY(-1px);
}

.ds-btn--warning {
    background: var(--ds-color-warning);
    color: var(--ds-color-text-inverse);
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.22);
}

.ds-btn--warning:hover:not(:disabled) {
    opacity: 0.88;
    transform: translateY(-1px);
}

.ds-btn-group {
    display: flex;
    gap: var(--ds-space-2);
    align-items: center;
    flex-wrap: wrap;
}

.ds-link {
    color: var(--ds-color-primary);
    font-weight: var(--ds-font-semibold);
    font-size: var(--ds-text-sm);
    text-decoration: none;
    transition: opacity var(--ds-transition-fast);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    font-family: inherit;
}

.ds-link:hover {
    opacity: 0.75;
    text-decoration: underline;
}

.ds-see-all {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--ds-color-primary);
    font-size: var(--ds-text-sm);
    font-weight: var(--ds-font-semibold);
    text-decoration: none;
    white-space: nowrap;
    padding: var(--ds-space-2) var(--ds-space-4);
    border: 1px solid var(--ds-color-border-strong);
    border-radius: var(--ds-radius-md);
    transition: background var(--ds-transition-base), border-color var(--ds-transition-base);
}

.ds-see-all:hover {
    background: var(--ds-color-primary-muted);
    border-color: var(--ds-color-primary);
}

.ds-btn--loading {
    pointer-events: none;
    color: transparent;
    position: relative;
}

.ds-btn--loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    animation: ds-spin 0.65s linear infinite;
    inset: 0;
    margin: auto;
}

.ds-btn--secondary.ds-btn--loading::after,
.ds-btn--ghost.ds-btn--loading::after,
.ds-btn--outline.ds-btn--loading::after {
    border-color: var(--ds-color-primary-muted);
    border-top-color: var(--ds-color-primary);
}

.ds-btn--sm.ds-btn--loading::after {
    width: 12px;
    height: 12px;
}

.ds-btn--lg.ds-btn--loading::after {
    width: 20px;
    height: 20px;
    border-width: 2.5px;
}

@media (max-width: 768px) {
    .ds-btn-group {
        flex-wrap: wrap;
    }
}