/* 拼豆图纸生成器专属样式 - 增强版 */

/* ========== 基础变量补充 ========== */
:root {
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.18);
}

/* ========== 加宽容器 ========== */
.tool-page .tool-container {
    max-width: 1200px;
}

/* ========== 双栏布局 ========== */
.bpg-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 1.25rem;
    align-items: start;
}

.bpg-left {
    min-width: 0;
}

.bpg-right {
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
    padding-right: 4px;
}

.bpg-right::-webkit-scrollbar {
    width: 5px;
}
.bpg-right::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

/* ========== 参数卡片（参考风格） ========== */
.setting-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.75rem 0.875rem;
    margin-bottom: 0.6rem;
    transition: border-color 0.2s ease;
}

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

.setting-card-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.setting-card-title i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* adv-panel 作为 setting-card 时的标题 */
.setting-card.adv-panel {
    padding: 0;
}
.setting-card.adv-panel > .setting-card-title {
    padding: 0.75rem 0.875rem;
    margin-bottom: 0;
    cursor: pointer;
    user-select: none;
    list-style: none;
}
.setting-card.adv-panel > .setting-card-title::-webkit-details-marker {
    display: none;
}
.setting-card.adv-panel > .setting-card-title::after {
    content: "";
    margin-left: auto;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid currentColor;
    transition: transform 0.2s ease;
}
.setting-card.adv-panel[open] > .setting-card-title::after {
    transform: rotate(180deg);
}
.setting-card.adv-panel .adv-params-grid {
    padding: 0 0.875rem 0.6rem;
}

/* action-card 特殊处理 */
.setting-card.action-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* ========== 工具标题 ========== */
.tool-title-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.tool-title-wrapper > i {
    font-size: 1.75rem;
    color: var(--primary-color);
}

.tool-title-wrapper .tool-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

/* ========== Toast 横幅提示 ========== */
.banner-alert {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    border: 1px solid;
    font-size: 0.9rem;
}

.banner-alert.info {
    background: #e6f7ff;
    border-color: #91d5ff;
    color: #0050b3;
}

.banner-alert.warning {
    background: #fffbe6;
    border-color: #ffe58f;
    color: #ad6800;
}

.banner-alert .banner-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.banner-alert .banner-dismiss {
    margin-left: auto;
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.7;
    color: inherit;
    font-size: 1rem;
    padding: 0.2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.banner-alert .banner-dismiss:hover {
    opacity: 1;
}

/* ========== 上传区 ========== */
.upload-section {
    margin-bottom: 1rem;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg, 12px);
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-light);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background: var(--primary-light, #eaf3fe);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: block;
}

.upload-area h3 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.upload-area p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ========== 输入通道快捷按钮 ========== */
.input-channels {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.6rem;
}

.channel-btn {
    padding: 0.4rem 0.75rem;
    font-size: 0.82rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.channel-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.channel-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* ========== 设置区 ========== */
.settings-section {
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
}

.setting-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.setting-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 80px;
}

/* 设置分组紧凑布局 */
.setting-group {
    margin-bottom: 0.5rem;
}

.setting-group-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

/* ========== 豆型规格切换 ========== */
.spec-toggle {
    display: flex;
    gap: 0;
    overflow: hidden;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-light);
}

.spec-option {
    flex: 1;
    padding: 0.4rem 0.75rem;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
}

.spec-option:hover {
    color: var(--primary-color);
}

.spec-option.active {
    background: var(--primary-color);
    color: #fff;
    box-shadow: none;
}

/* ========== 尺寸模式切换 ========== */
.dim-mode-toggle {
    display: flex;
    gap: 0;
    overflow: hidden;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-light);
}

.dim-mode-toggle .spec-option {
    padding: 0.45rem 0.85rem;
}

.dim-banner {
    font-size: 0.8rem;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: 500;
    line-height: 1.4;
}

.dim-banner.warn {
    background: #fff7e6;
    color: #d48806;
    border: 1px solid #ffe58f;
}

.dim-banner.danger {
    background: #fff1f0;
    color: #cf1322;
    border: 1px solid #ffa39e;
}

.dim-banner.info {
    background: #e6f7ff;
    color: #096dd9;
    border: 1px solid #91d5ff;
}

/* ========== 预设尺寸按钮 ========== */
.preset-group {
    width: 100%;
    margin-bottom: 0.5rem;
}

.preset-group > label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.4rem;
}

.preset-group.bean-5mm,
.preset-group.bean-2mm6 {
    margin-bottom: 0.6rem;
}

.preset-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.preset-btn {
    padding: 0.4rem 0.875rem;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.preset-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.preset-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* ========== 自定义尺寸区 ========== */
.custom-size-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.lock-aspect {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.lock-aspect input[type="checkbox"] {
    accent-color: var(--primary-color);
}

.dual-size-input {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.dual-size-input input[type="number"] {
    width: 90px;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    background: var(--bg-white);
    color: inherit;
    -moz-appearance: textfield;
}

.dual-size-input input[type="number"]::-webkit-outer-spin-button,
.dual-size-input input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.dual-size-input .size-sep {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 1rem;
}

.phys-size {
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
}

.custom-size-wrap input[type="number"] {
    width: 90px;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    background: var(--bg-white);
    color: inherit;
}

.setting-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

#paletteSelect {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    background: var(--bg-white);
    color: inherit;
    max-width: 100%;
}

.action-row {
    justify-content: space-between;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--primary-color);
}

.row-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ========== 高级参数折叠面板 ========== */
.adv-panel {
    margin-top: 0.5rem;
    border-top: 1px dashed var(--border-color);
}

.adv-panel > summary {
    padding: 0.5rem 0;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
    user-select: none;
}

.adv-panel > summary::-webkit-details-marker {
    display: none;
}

.adv-panel > summary::after {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid currentColor;
    margin-left: auto;
    transition: transform 0.2s ease;
}

.adv-panel[open] > summary::after {
    transform: rotate(180deg);
}

.adv-panel > summary:hover {
    color: var(--primary-color);
}

.adv-params-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 0.875rem;
    padding: 0.15rem 0 0.35rem 0;
}

.adv-group {
    display: flex;
    flex-direction: column;
}

.adv-group > label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.2rem;
}

.adv-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.adv-control input[type="range"] {
    flex: 1;
    width: 100%;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.adv-control select {
    width: 100%;
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    background: var(--bg-white);
    color: inherit;
}

.adv-control input[type="number"] {
    width: 4rem;
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    background: var(--bg-white);
    color: inherit;
    -moz-appearance: textfield;
}

.adv-control input[type="number"]::-webkit-outer-spin-button,
.adv-control input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.range-value-pill {
    display: inline-block;
    min-width: 2.2rem;
    text-align: center;
    font-variant-numeric: tabular-nums;
    padding: 0.12rem 0.5rem;
    background: var(--primary-light);
    color: var(--primary-color);
    font-weight: 600;
    border-radius: 6px;
    font-size: 0.78rem;
    flex-shrink: 0;
}

/* ========== 裁剪编辑器覆盖层 ========== */
.crop-editor {
    max-height: 380px;
    overflow: hidden;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: #000;
    margin-bottom: 1rem;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.crop-editor canvas {
    image-rendering: pixelated;
    max-width: 100%;
    max-height: 300px;
    width: auto;
    height: auto;
    display: block;
}

.crop-toolbar {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: rgba(255, 255, 255, 0.95);
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 0.5rem;
}

[data-theme="dark"] .crop-toolbar {
    background: rgba(40, 40, 40, 0.95);
}

.crop-range-group {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.crop-range-group input[type="range"] {
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* ========== 预览区 ========== */
.preview-section {
    margin-top: 1.25rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
}

.canvas-wrap {
    overflow: auto;
    max-height: 520px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-light);
    padding: 0.75rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

#gridCanvas {
    max-width: 100%;
    height: auto;
    cursor: crosshair;
    image-rendering: pixelated;
    /* 保持 1:1 等比例，避免拉伸变形 */
    object-fit: contain;
}

/* ========== 操作工具栏 ========== */
.action-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

/* ========== 视图切换分段控件 ========== */
.view-toggle {
    display: flex;
    gap: 0;
    overflow: hidden;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-light);
    flex-shrink: 0;
}

.view-toggle .spec-option {
    padding: 0.4rem 0.75rem;
    font-size: 0.82rem;
}

.view-toggle + .checkbox-label {
    font-size: 0.85rem;
    margin-left: 0.25rem;
}

.total-beads {
    margin-left: auto;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* ========== 编辑工具栏 ========== */
.edit-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.35rem;
    padding: 0.6rem;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
}

.et-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.15s ease;
    position: relative;
}

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

.et-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.et-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 带文字的工具按钮自适应宽度，避免 36px 固定宽导致文字挤压错位 */
.edit-toolbar .et-btn.et-swap,
.edit-toolbar .et-btn.et-replace,
.edit-toolbar .et-btn.et-redo,
.edit-toolbar .et-btn.et-clear {
    width: auto;
    height: 32px;
    padding: 0 0.7rem;
    gap: 0.35rem;
    font-size: 0.82rem;
    white-space: nowrap;
}

.et-btn[aria-label]:hover::after {
    content: attr(aria-label);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    white-space: nowrap;
    pointer-events: none;
    z-index: 10;
    font-weight: 500;
}

.et-sep {
    width: 1px;
    background: var(--border-color);
    align-self: stretch;
    margin: 0 0.3rem;
}

.cur-swatch {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
    cursor: pointer;
    transition: transform 0.15s ease;
}

.cur-swatch:hover {
    transform: scale(1.05);
}

.cur-color-id {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0 0.25rem;
    font-variant-numeric: tabular-nums;
}

/* ========== 用量统计 ========== */
.stats-panel {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.stats-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-light);
}

.stats-tabs {
    display: flex;
    gap: 0;
    padding: 0 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-white);
}

.stats-tab {
    padding: 0.6rem 0.85rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.stats-tab:hover {
    color: var(--primary-color);
}

.stats-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.stats-body {
    padding: 0.75rem;
}

.stats-table {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.5rem;
    max-height: 260px;
    overflow-y: auto;
    padding: 0.25rem;
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    transition: transform 0.15s ease;
}

.stats-item:hover {
    transform: translateX(2px);
}

.stats-swatch {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.stats-id {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.stats-count {
    margin-left: auto;
    color: var(--text-secondary);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.stats-actions {
    display: flex;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-light);
    flex-wrap: wrap;
}

.btn-secondary {
    padding: 0.45rem 0.85rem;
    font-size: 0.82rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: all 0.2s ease;
    font-weight: 500;
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

/* ========== 导出下拉菜单 ========== */
.export-dropdown {
    position: relative;
    display: inline-block;
}

.export-dropdown .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.export-dropdown .btn-primary .arrow {
    font-size: 0.7rem;
    transition: transform 0.2s ease;
}

.export-dropdown.open .btn-primary .arrow {
    transform: rotate(180deg);
}

.export-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    z-index: 100;
    min-width: 220px;
    overflow: hidden;
    display: none;
}

.export-dropdown.open .export-menu {
    display: block;
}

.export-item {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    width: 100%;
    padding: 0.6rem 1rem;
    border: none;
    background: none;
    text-align: left;
    font-size: 0.88rem;
    cursor: pointer;
    transition: background 0.15s ease;
    color: var(--text);
}

.export-item:hover {
    background: var(--primary-light);
}

.export-item .export-icon {
    font-size: 1rem;
    width: 1.2rem;
    text-align: center;
    flex-shrink: 0;
    color: var(--primary-color);
}

.export-item-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.export-item-label {
    font-weight: 500;
}

.export-item-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ========== 历史记录侧边栏 ========== */
.history-panel {
    margin-top: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.history-panel-header {
    padding: 0.75rem 1rem;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.history-panel-title {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.history-list {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
    padding: 0.75rem;
    max-height: 320px;
    overflow-y: auto;
}

.history-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-white);
    display: flex;
    flex-direction: column;
}

.history-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.history-thumb {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    overflow: hidden;
    position: relative;
}

.history-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    image-rendering: pixelated;
}

.history-meta {
    padding: 0.4rem 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.history-title {
    font-weight: 600;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-time {
    font-size: 0.7rem;
    opacity: 0.8;
}

.history-actions {
    display: flex;
    gap: 0.3rem;
    margin-top: 0.3rem;
}

.history-action-btn {
    flex: 1;
    padding: 0.25rem 0.35rem;
    font-size: 0.7rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-light);
    cursor: pointer;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    transition: all 0.15s ease;
}

.history-action-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

.history-action-btn.danger:hover {
    border-color: #cf1322;
    color: #cf1322;
    background: #fff1f0;
}

/* ========== 公共模板网格 ========== */
.templates-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.6rem;
    padding: 0.75rem;
}

.template-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-white);
    position: relative;
    display: flex;
    flex-direction: column;
}

.template-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.template-thumb {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    overflow: hidden;
    position: relative;
}

.template-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.template-category-label {
    position: absolute;
    top: 0.4rem;
    left: 0.4rem;
    padding: 0.15rem 0.5rem;
    font-size: 0.68rem;
    font-weight: 600;
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    border-radius: 999px;
    backdrop-filter: blur(4px);
    z-index: 2;
}

.template-meta {
    padding: 0.5rem 0.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.template-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.template-info {
    font-size: 0.72rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.template-size {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.7rem;
}

.template-load-btn {
    margin-top: 0.35rem;
    padding: 0.35rem 0.6rem;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: center;
}

.template-load-btn:hover {
    background: var(--primary-color);
    color: #fff;
}

/* ========== 自定义色卡 ========== */
.palette-editor {
    margin-top: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.palette-editor summary {
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    list-style: none;
    background: var(--bg-light);
    user-select: none;
}

.palette-editor summary::-webkit-details-marker {
    display: none;
}

.palette-editor[open] summary {
    border-bottom: 1px solid var(--border-color);
}

.palette-edit-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    max-height: 300px;
    overflow-y: auto;
}

.palette-edit-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    padding: 0.3rem 0.4rem;
    border-radius: 6px;
    transition: background 0.15s ease;
}

.palette-edit-item:hover {
    background: var(--bg-light);
}

.palette-edit-item .pe-id {
    min-width: 42px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.palette-edit-item input[type="color"] {
    width: 34px;
    height: 26px;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: none;
    cursor: pointer;
    flex-shrink: 0;
}

.palette-edit-item input[type="text"] {
    flex: 1;
    padding: 0.2rem 0.4rem;
    font-size: 0.78rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-white);
    color: inherit;
    min-width: 0;
}

.palette-edit-item .pe-check {
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* ========== 换色浮层 ========== */
.palette-picker {
    position: fixed;
    left: 50%;
    bottom: 1rem;
    transform: translateX(-50%);
    width: min(420px, calc(100% - 2rem));
    max-height: 260px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    padding: 0.875rem;
    z-index: 2000;
    display: none;
}

.palette-picker.open {
    display: block;
}

.palette-picker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.palette-picker-close {
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.palette-picker-close:hover {
    background: var(--bg-light);
    color: var(--text);
}

.palette-picker-search {
    margin-bottom: 0.6rem;
}

.palette-picker-search input {
    width: 100%;
    padding: 0.4rem 0.65rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    background: var(--bg-light);
    color: inherit;
}

.palette-picker-search input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-white);
}

.palette-picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(34px, 1fr));
    gap: 0.4rem;
    max-height: 170px;
    overflow-y: auto;
    padding: 0.2rem;
}

.picker-swatch {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    position: relative;
    transition: transform 0.1s ease, border-color 0.1s ease;
}

.picker-swatch:hover {
    transform: scale(1.12);
    border-color: var(--primary-color);
    z-index: 2;
}

.picker-swatch.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.picker-swatch.selected::after {
    content: "\2713";
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* ========== 响应式适配 ========== */

/* 中等屏幕：双栏变单栏 */
@media (max-width: 1024px) {
    .tool-page .tool-container {
        max-width: 900px;
    }
    .bpg-layout {
        grid-template-columns: 1fr;
    }
    .bpg-right {
        position: static;
        max-height: none;
        overflow-y: visible;
    }
}

@media (max-width: 768px) {
    .setting-label {
        min-width: 100%;
    }

    .action-row {
        justify-content: flex-start;
    }

    .total-beads {
        margin-left: 0;
        width: 100%;
    }

    .adv-params-grid {
        grid-template-columns: 1fr;
    }

    .history-list {
        grid-template-columns: 1fr 1fr;
    }

    .templates-grid {
        grid-template-columns: 1fr 1fr;
    }

    .view-toggle + .checkbox-label {
        margin-left: 0;
        margin-top: 0.25rem;
    }
}

@media (max-width: 480px) {
    .preset-btn {
        padding: 0.35rem 0.7rem;
        font-size: 0.8rem;
    }

    .stats-table,
    .palette-edit-list {
        grid-template-columns: 1fr;
    }

    .edit-toolbar .et-btn {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    .dual-size-input {
        width: 100%;
        flex-direction: row;
    }

    .dual-size-input input[type="number"] {
        flex: 1;
        width: auto;
        min-width: 0;
    }

    .export-dropdown {
        width: 100%;
    }

    .export-dropdown .btn-primary {
        width: 100%;
        justify-content: center;
    }

    .export-menu {
        min-width: 100%;
        right: auto;
        left: 0;
    }

    .spec-toggle,
    .dim-mode-toggle,
    .view-toggle {
        width: 100%;
    }

    .spec-option,
    .dim-mode-toggle .spec-option,
    .view-toggle .spec-option {
        font-size: 0.82rem;
        padding: 0.45rem 0.5rem;
    }

    .history-list,
    .templates-grid {
        grid-template-columns: 1fr;
    }

    .input-channels {
        gap: 0.35rem;
    }

    .channel-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.78rem;
    }

    .crop-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .crop-range-group {
        justify-content: space-between;
    }
}

/* ========== 暗色模式适配 ========== */
[data-theme="dark"] .upload-area {
    background: var(--bg-light);
}

[data-theme="dark"] #paletteSelect,
[data-theme="dark"] .custom-size-wrap input[type="number"],
[data-theme="dark"] .dual-size-input input[type="number"],
[data-theme="dark"] .preset-btn,
[data-theme="dark"] .btn-secondary,
[data-theme="dark"] .channel-btn,
[data-theme="dark"] .et-btn,
[data-theme="dark"] .adv-control select,
[data-theme="dark"] .adv-control input[type="number"],
[data-theme="dark"] .export-item,
[data-theme="dark"] .history-card,
[data-theme="dark"] .template-card,
[data-theme="dark"] .export-menu {
    background: var(--bg-light);
    color: inherit;
}

[data-theme="dark"] .preset-btn.active,
[data-theme="dark"] .channel-btn.active,
[data-theme="dark"] .et-btn.active {
    color: #fff;
}

[data-theme="dark"] .palette-picker {
    background: var(--bg-light, #1e1e1e);
}

[data-theme="dark"] .adv-panel > summary,
[data-theme="dark"] .adv-group > label,
[data-theme="dark"] .setting-label,
[data-theme="dark"] .preset-group > label,
[data-theme="dark"] .stats-count,
[data-theme="dark"] .cur-color-id,
[data-theme="dark"] .export-item-desc,
[data-theme="dark"] .history-meta,
[data-theme="dark"] .template-info,
[data-theme="dark"] .checkbox-label,
[data-theme="dark"] .setting-hint,
[data-theme="dark"] .palette-picker-close,
[data-theme="dark"] .stats-tab {
    color: var(--text-secondary);
}

[data-theme="dark"] .stats-item,
[data-theme="dark"] .palette-edit-item:hover,
[data-theme="dark"] .history-thumb,
[data-theme="dark"] .template-thumb,
[data-theme="dark"] .range-value-pill,
[data-theme="dark"] .spec-toggle,
[data-theme="dark"] .dim-mode-toggle,
[data-theme="dark"] .view-toggle,
[data-theme="dark"] .stats-title,
[data-theme="dark"] .palette-editor summary,
[data-theme="dark"] .edit-toolbar,
[data-theme="dark"] .stats-body,
[data-theme="dark"] .stats-tabs,
[data-theme="dark"] .history-panel-header,
[data-theme="dark"] .stats-actions,
[data-theme="dark"] .palette-picker-search input {
    background: var(--bg-light);
}

[data-theme="dark"] .banner-alert.info {
    background: rgba(9, 109, 217, 0.15);
    border-color: rgba(145, 213, 255, 0.4);
    color: #91d5ff;
}

[data-theme="dark"] .banner-alert.warning {
    background: rgba(212, 136, 6, 0.15);
    border-color: rgba(255, 229, 143, 0.4);
    color: #ffe58f;
}

[data-theme="dark"] .template-size {
    background: rgba(24, 144, 255, 0.2);
    color: var(--primary-color);
}

[data-theme="dark"] .template-category-label {
    background: rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .palette-edit-item input[type="text"] {
    background: var(--bg-light);
    border-color: var(--border-color);
    color: inherit;
}