/* ========================================
   Sidebar Overlay
   ======================================== */

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 200;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Settings Sidebar
   ======================================== */

.settings-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 201;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.settings-sidebar.active {
    transform: translateX(0);
}

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

.sidebar-title {
    font-family: var(--ui-serif);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
}

.sidebar-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.sidebar-close:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
}

.sidebar-close svg {
    width: 18px;
    height: 18px;
}

.sidebar-content {
    flex: 1;
    overflow-y: scroll; /* 始终显示滚动条，防止宽度变化 */
    padding: var(--space-lg);
}

/* 侧边栏滚动条样式优化 */
.sidebar-content::-webkit-scrollbar {
    width: 6px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* Setting Groups */
.setting-group {
    margin-bottom: 18px;
}

.setting-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.setting-icon {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
}

.setting-control {
    display: flex;
    align-items: center;
    width: 100%;
}

/* 字号控制：中间值居中 */
.setting-control:has(.size-btn) .setting-value {
    flex: 1;
    text-align: center;
}

.setting-value {
    font-size: 0.875rem;
    font-family: var(--font-mono);
    color: var(--color-text-secondary);
    min-width: 50px;
    text-align: center;
    flex-shrink: 0;
}

/* Setting Row - 两列布局 */
.setting-row {
    display: flex;
    gap: var(--space-lg);
    align-items: flex-end;
}

.setting-item {
    flex: 1;
    min-width: 0;
}

.setting-item .setting-label {
    margin-bottom: var(--space-xs);
}

.setting-item .setting-select {
    width: 100%;
}

.setting-select-small {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.8rem;
}

.setting-control-compact {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.setting-control-compact .size-btn {
    width: 28px;
    height: 28px;
}

.setting-control-compact .setting-value {
    min-width: 42px;
    font-size: 0.8rem;
}

/* Theme Toggle Button */
.theme-btn {
    flex: 1;
    height: 40px;
    padding: 0 var(--space-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.theme-btn:hover {
    background: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

/* Theme label text - 使用 !important 确保优先级 */
.theme-label-light {
    display: inline !important;
}

.theme-label-dark {
    display: none !important;
}

/* Dark mode theme labels */
[data-theme="dark"] .theme-label-light {
    display: none !important;
}

[data-theme="dark"] .theme-label-dark {
    display: inline !important;
}

/* Theme icons in label - 使用 !important 确保优先级 */
.theme-icon-sun,
.setting-label .theme-icon-sun {
    display: inline-block !important;
    width: 16px;
    height: 16px;
}

.theme-icon-moon,
.setting-label .theme-icon-moon {
    display: none !important;
    width: 16px;
    height: 16px;
}

/* Dark mode theme icons */
[data-theme="dark"] .theme-icon-sun,
[data-theme="dark"] .setting-label .theme-icon-sun {
    display: none !important;
}

[data-theme="dark"] .theme-icon-moon,
[data-theme="dark"] .setting-label .theme-icon-moon {
    display: inline-block !important;
}

/* Toggle Button（如「图片显示」：有图模式 / 无图模式） */
.toggle-btn {
    flex: 1;
    height: 40px;
    padding: 0 var(--space-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.toggle-btn:hover {
    background: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

/* Range Slider */
input[type="range"] {
    flex: 10;
    height: 4px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

/* Range slider container with gap */
.setting-control:has(input[type="range"]) {
    gap: var(--space-md);
}

/* Range slider value - fixed width on the right */
input[type="range"] + .setting-value {
    min-width: 55px;
    text-align: right;
    flex-shrink: 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 2px 8px var(--color-shadow);
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

/* Custom Select */
.custom-select {
    position: relative;
    width: 100%;
    user-select: none;
}

.custom-select-trigger {
    display: flex;
    align-items: center;
    width: 100%;
    height: 40px;
    padding: 0 36px 0 var(--space-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-sizing: border-box;
}

.custom-select-trigger:hover {
    border-color: var(--color-primary);
}

.custom-select.open .custom-select-trigger {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

.custom-select-trigger::after {
    content: '';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--color-text-secondary);
    pointer-events: none;
    transition: all var(--transition-fast);
}

.custom-select.open .custom-select-trigger::after {
    transform: translateY(-50%) rotate(180deg);
    border-top-color: var(--color-primary);
}

.custom-select-options {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px var(--color-shadow);
    z-index: 10;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all var(--transition-fast);
    pointer-events: none;
}

.custom-select.open .custom-select-options {
    max-height: 300px;
    overflow-y: auto;
    opacity: 1;
    pointer-events: auto;
}

.custom-select-option {
    padding: 10px var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.custom-select-option:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
}

.custom-select-option.selected {
    background: #f5f5f3;
    color: #000000;
}

[data-theme="dark"] .custom-select-option.selected {
    background: #1e5099;
    color: #ffffff;
}

/* 保留原生 select 样式用于其他可能的 select */
.setting-select {
    width: 100%;
    height: 40px;
    padding: 0 36px 0 var(--space-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    transition: all var(--transition-fast);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.setting-select:hover {
    border-color: var(--color-primary);
}

.setting-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

/* Size Buttons */
.size-btn {
    width: 60px;
    height: 40px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.size-btn:hover {
    background: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

.size-btn svg {
    width: 14px;
    height: 14px;
}

/* Background Tabs */
.bg-tabs {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
    background: var(--color-bg-secondary);
    padding: var(--space-xs);
    border-radius: var(--radius-md);
}

.bg-tab {
    flex: 1;
    padding: var(--space-xs) var(--space-sm);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.bg-tab:hover {
    color: var(--color-text);
}

.bg-tab.active {
    background: var(--color-bg);
    color: var(--color-primary);
    font-weight: 500;
    box-shadow: 0 1px 3px var(--color-shadow);
}

/* Background Panels */
.bg-panel {
    display: none;
}

.bg-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Background Grid */
.bg-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
}

.bg-option {
    aspect-ratio: 1;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.bg-option:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.bg-option.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(44, 62, 80, 0.2);
}

.bg-option.selected::after {
    content: '';
    position: absolute;
    top: 4px;
    right: 4px;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bg-option.artistic,
.bg-option.chinese {
    background-size: cover;
    background-position: center;
}

/* 信笺：1920x860 整幅画面，缩略图也保持完整可见（contain） */
.bg-option.stationery {
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Status Bar Toggle Buttons */
.status-bar-toggles {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: nowrap;
}

.status-toggle-btn {
    flex: 1 1 0;
    min-width: 0;
    height: 40px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-primary);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.status-toggle-btn.active {
    background: #F5F5F3;
    color: var(--color-primary);
}

.status-toggle-btn:not(.active) {
    opacity: 0.5;
}