/* === REUSABLE UI COMPONENTS === */

/* --- 1. 按鈕系列 (Buttons) --- */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: background-color 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    white-space: nowrap;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    pointer-events: none;
}

.btn.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    flex-shrink: 0;
}

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

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: #fff;
}

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

.btn-success {
    background-color: var(--success-color);
    color: #fff;
}

.btn-success:hover:not(:disabled) {
    background-color: var(--success-color-hover);
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* --- 2. Toast 提示通知 (Toast Notifications) --- */
#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1020;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--border-radius-md);
    color: #fff;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.21, 1.02, 0.73, 1);
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background-color: #16a34a;
}

.toast.error {
    background-color: #dc2626;
}

.toast.info {
    background-color: #2563eb;
}

/* --- 3. 視圖切換按鈕 (View Toggle Button) --- */
.view-toggle {
    display: none;
    padding: 0.5rem;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
    color: var(--text-secondary);
}

.view-toggle svg {
    width: 20px;
    height: 20px;
}

.view-toggle .icon-list {
    display: none;
}

.view-toggle.list-view-active .icon-grid {
    display: none;
}

.view-toggle.list-view-active .icon-list {
    display: block;
}

/* --- 4. 分頁控制 (Pagination) --- */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2.5rem;
}

.pagination-container .btn,
.pagination-container .page-info {
    padding: 0.5rem 1rem;
    min-width: 44px;
    height: 44px;
}

.pagination-container .page-info {
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* --- 5. 通用 Modal 與表單 (Generic Modals & Forms) --- */
.modal-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5vh 2vw;
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-in-out;
}

.modal-container:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    overscroll-behavior: contain;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    flex-direction: column;
}

.modal-container:not(.hidden) .modal-content {
    transform: scale(1);
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
    z-index: 10;
}

.close-btn:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-header {
    flex-shrink: 0;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
}

.modal-header .close-btn {
    position: static;
    transform: none;
}

.modal-body {
    flex-grow: 1;
    display: flex;
    gap: 1.5rem;
    overflow: hidden;
    padding: 1.5rem;
}

.modal-footer {
    flex-shrink: 0;
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.modal-footer .button-group {
    margin: 0;
    justify-content: flex-end;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

form input,
form textarea,
form select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color .2s, box-shadow .2s;
}

form input:focus,
form textarea:focus,
form select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 25%, transparent);
}

/* 響應式調整 */
@media (max-width: 768px) {
    .header-actions .view-toggle {
        display: flex;
    }

    .modal-content {
        padding: 1.5rem;
        height: auto;
        max-height: 85vh;
        margin-top: 2rem;
        margin-bottom: 2rem;
        transform: scale(1) !important;
    }
}

/* --- 麵包屑導覽 (Breadcrumb) --- */
#breadcrumb-container {
    padding: 0.6rem 0 0.4rem 0;
    margin-bottom: 0.5rem;
}

.breadcrumb-trail {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    gap: 0;
}

.breadcrumb-trail li {
    display: flex;
    align-items: center;
}

.breadcrumb-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.breadcrumb-link:hover {
    color: var(--primary-color-hover);
    text-decoration: underline;
}

.breadcrumb-sep {
    margin: 0 0.4rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    user-select: none;
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 500;
    /* 過長的產品名稱截斷顯示 */
    max-width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: inline-block;
    vertical-align: middle;
}

@media (max-width: 768px) {
    .breadcrumb-current {
        max-width: 130px;
    }
}