/* 버튼 컴포넌트 스타일 - Windows 스타일 */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 14px;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    border-radius: 0;
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
    white-space: nowrap;
    user-select: none;
    border: 1px solid #d1d1d1;
    background: linear-gradient(to bottom, #ffffff, #f0f0f0);
    color: #000000;
    font-family: 'Segoe UI', Tahoma, sans-serif;
}

/* 버튼 크기 */
.btn-sm {
    padding: 4px 10px;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 8px 20px;
    font-size: 1rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* 버튼 변형 */
.btn-primary {
    background: #0078d4;
    color: #ffffff;
    border-color: #0078d4;
}

.btn-primary:hover:not(:disabled) {
    background: #106ebe;
    border-color: #106ebe;
}

.btn-secondary {
    background: linear-gradient(to bottom, #ffffff, #e1e1e1);
    color: #000000;
    border-color: #adadad;
}

.btn-secondary:hover:not(:disabled) {
    background: linear-gradient(to bottom, #f0f0f0, #e1e1e1);
    border-color: #0078d4;
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-ghost {
    background-color: transparent;
    color: var(--text-primary);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-gray-100);
}

.btn-danger {
    background-color: var(--color-danger);
    color: var(--color-white);
    border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
}

/* 버튼 상태 */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: #f0f0f0;
    color: #a0a0a0;
}

.btn:focus-visible {
    outline: 1px dotted #000000;
    outline-offset: -4px;
}

/* 버튼 로딩 상태 */
.btn-loading .btn-text {
    visibility: hidden;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: var(--spacing-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 버튼 그룹 */
.btn-group {
    display: inline-flex;
    gap: var(--spacing-xs);
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* 아이콘 버튼 */
.btn-icon {
    padding: var(--spacing-sm);
    width: 40px;
    height: 40px;
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
}

.btn-icon.btn-lg {
    width: 48px;
    height: 48px;
}