/* ==========================================================================
   BeadBoard editor — Neo Brutalism 风格
   硬阴影、粗黑边框、高对比色彩、零圆角（仅 toggle 例外）
   ========================================================================== */

:root {
    /* Brand & accent — DESIGN-MY.md 色板 */
    --primary: #E63946;
    --on-primary: #FFFFFF;
    --primary-hover: #C62828;
    --secondary: #7C3AED;
    --secondary-hover: #6D28D9;
    --accent: #0D9488;
    --accent-hover: #0F766E;
    --warning: #F59E0B;
    --warning-hover: #D97706;
    --info: #3B82F6;
    --info-hover: #2563EB;
    --danger: #EA580C;
    --danger-hover: #C2410C;
    --success: #22C55E;
    --success-hover: #16A34A;

    /* Surface */
    --canvas: #FFFFFF;
    --surface: #F5F5F5;
    --surface-warm: #FEF9E7;   /* neutral-surface(yellow-cream) */
    --surface-header: #FEF9E7;

    /* Border — Neo Brutalism 固定黑色粗边框 */
    --border-color: #1A1A1A;
    --border-width: 2px;
    --border-width-thick: 3px;

    /* Text */
    --ink: #1A1A1A;
    --ink-deep: #000000;
    --slate: #4A4A4A;
    --stone: #6B6B6B;
    --muted: #9CA3AF;
    --on-dark: #FFFFFF;
    --on-dark-muted: #B0B0B0;

    /* Radius — Neo Brutalism: 统一圆角 */
    --r-none: 8px;
    --r-sm: 4px;
    --r-md: 8px;
    --r-full: 9999px;

    /* Spacing (4px base) */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;
    --sp-7: 32px;
    --sp-8: 40px;
    --sp-9: 48px;
    --sp-10: 64px;

    /* Elevation — Neo Brutalism: 硬阴影，无 blur */
    --shadow-1: 3px 3px 0px var(--border-color);
    --shadow-2: 4px 4px 0px var(--border-color);
    --shadow-3: 6px 6px 0px var(--border-color);
    --shadow-4: 8px 8px 0px var(--border-color);

    /* Type */
    --font-display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "SF Mono", Menlo, Consolas, monospace;
}

/* ---- 基础 ---- */

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.5;
    color: var(--ink);
    background-color: #FDF3EA;
    background-image:
        /* 随机色块 — 撒在 40px 网格格点上 */
        linear-gradient(var(--primary), var(--primary)),
        linear-gradient(var(--accent), var(--accent)),
        linear-gradient(var(--secondary), var(--secondary)),
        linear-gradient(var(--warning), var(--warning)),
        linear-gradient(var(--primary), var(--primary)),
        linear-gradient(var(--secondary), var(--secondary)),
        /* 粗网格线（每 120px） */
        repeating-linear-gradient(
            to right,
            transparent 0px,
            transparent 119px,
            rgba(0, 0, 0, 0.10) 119px,
            rgba(0, 0, 0, 0.10) 120px
        ),
        repeating-linear-gradient(
            to bottom,
            transparent 0px,
            transparent 119px,
            rgba(0, 0, 0, 0.10) 119px,
            rgba(0, 0, 0, 0.10) 120px
        ),
        /* 细网格线（每 40px） */
        repeating-linear-gradient(
            to right,
            transparent 0px,
            transparent 39px,
            rgba(0, 0, 0, 0.05) 39px,
            rgba(0, 0, 0, 0.05) 40px
        ),
        repeating-linear-gradient(
            to bottom,
            transparent 0px,
            transparent 39px,
            rgba(0, 0, 0, 0.05) 39px,
            rgba(0, 0, 0, 0.05) 40px
        );
    background-size:
        40px 40px, 40px 40px, 40px 40px, 40px 40px, 40px 40px, 40px 40px,
        auto, auto, auto, auto;
    background-repeat:
        no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat,
        repeat, repeat, repeat, repeat;
    background-position:
        40px 40px, 160px 0px, 280px 120px, 80px 80px, 0px 160px, 200px 40px,
        0 0, 0 0, 0 0, 0 0;
    background-attachment: fixed;
}


/* SSR 渲染时隐藏 */
body:not([data-ready="true"]) {
    visibility: hidden;
}

/* 页面就绪前禁用所有过渡，防止异步 CSS 加载导致渐入动画 */
body:not([data-ready="true"]) * {
    transition: none !important;
}

/* Typography — Neo Brutalism: bold weights, sharp */
h1 {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.5px;
    margin: 0 0 var(--sp-3);
    color: var(--ink-deep);
}

h2 {
    font-size: 24px;
    font-weight: 800;
    line-height: 1.25;
    margin: 0 0 var(--sp-3);
    color: var(--ink-deep);
}

.hero-display {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -1.5px;
}

.display-lg {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.10;
    letter-spacing: -1px;
}

.micro-uppercase {
    font-size: 11px;
    font-weight: 600;
    line-height: 1.40;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.meta {
    color: var(--slate);
    font-size: 14px;
    font-weight: 500;
    margin: 0 0 var(--sp-4);
}

.error {
    color: var(--danger);
    background: #FEE2E2;
    border: var(--border-width) solid var(--danger);
    border-radius: var(--r-none);
    padding: var(--sp-3) var(--sp-4);
}

.msg {
    color: var(--accent);
    background: #CCFBF1;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    padding: var(--sp-3) var(--sp-4);
    margin: 0 0 var(--sp-4);
}

/* ---- 顶栏（Neo Brutalism: 白色底 + 粗黑底边） ---- */

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: var(--sp-6);
    height: 64px;
    padding: 0 var(--sp-7);
    background: var(--canvas);
    color: var(--ink);
    border-bottom: var(--border-width-thick) solid var(--border-color);
}

.topbar-brand {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 800;
    color: var(--ink-deep);
    text-decoration: none;
}

.topbar-meta {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 500;
    color: var(--slate);
}

/* ---- 语言切换按钮 ---- */

beadboard-lang {
    display: flex;
    gap: var(--sp-1);
    flex-shrink: 0;
}

.lang-btn {
    padding: 4px 8px;
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.3;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--canvas);
    color: var(--slate);
    cursor: pointer;
    transition: all 0.12s ease;
}

.lang-btn:hover {
    background: var(--surface-header);
    color: var(--ink-deep);
}

.lang-btn.active {
    background: var(--primary);
    border-color: var(--border-color);
    color: var(--on-primary);
    box-shadow: var(--shadow-1);
}


/* ---- Buttons — Neo Brutalism: 纯色 + 硬阴影 + 粗边框 ---- */

/* button-primary: 红色主操作 */
.save-btn,
.btn-primary {
    padding: 12px 28px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 700;
    line-height: 1.30;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--primary);
    color: var(--on-primary);
    cursor: pointer;
    box-shadow: var(--shadow-3);
    transition: all 0.1s ease;
    text-decoration: none;
    display: inline-block;
}

.save-btn:hover,
.btn-primary:hover {
    background: var(--primary-hover);
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0px var(--border-color);
}

.save-btn:active,
.btn-primary:active {
    transform: translate(0, 0);
    box-shadow: var(--shadow-1);
}

/* button-generate: 青色生成按钮 */
.gen-btn {
    padding: 10px 24px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.30;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--accent);
    color: var(--on-primary);
    cursor: pointer;
    box-shadow: var(--shadow-2);
    transition: all 0.1s ease;
    letter-spacing: 0.3px;
    display: inline-block;
}

.gen-btn:hover {
    background: var(--accent-hover);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
}

.gen-btn:active {
    transform: translate(0, 0);
    box-shadow: var(--shadow-1);
}

/* button-secondary: 黄色次操作 */
.gen-upload-btn,
.btn-secondary {
    padding: 12px 28px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 700;
    line-height: 1.30;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--warning);
    color: var(--ink-deep);
    cursor: pointer;
    box-shadow: var(--shadow-3);
    transition: all 0.1s ease;
    display: inline-block;
    text-decoration: none;
}

.gen-upload-btn:hover,
.btn-secondary:hover {
    background: var(--warning-hover);
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0px var(--border-color);
}

.gen-upload-btn:active,
.btn-secondary:active {
    transform: translate(0, 0);
    box-shadow: var(--shadow-1);
}

/* button-on-dark: 白色按钮（深色背景上） */
.btn-on-dark {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 700;
    line-height: 1.30;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--canvas);
    color: var(--ink-deep);
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-3);
    transition: all 0.1s ease;
}

.btn-on-dark:hover {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0px var(--border-color);
}

.btn-on-dark:active {
    transform: translate(0, 0);
    box-shadow: var(--shadow-1);
}

/* button-ghost: 描边辅助按钮 */
.btn-ghost {
    padding: 12px 28px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 700;
    line-height: 1.30;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: transparent;
    color: var(--ink-deep);
    cursor: pointer;
    transition: all 0.1s ease;
}

.btn-ghost:hover {
    background: var(--surface);
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow-3);
}

/* button-secondary-on-dark: 在深色背景上的次要按钮 */
.btn-secondary-on-dark {
    display: inline-block;
    padding: 10px 22px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.30;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--canvas);
    color: var(--ink-deep);
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-2);
    transition: all 0.1s ease;
}

.btn-secondary-on-dark:hover {
    background: var(--surface-warm);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
}

.btn-secondary-on-dark:active {
    transform: translate(0, 0);
    box-shadow: var(--shadow-1);
}

#btn-open-stats,
#btn-view-svg,
#btn-generate {
    margin-top: var(--sp-3);
    align-self: flex-start;
}

/* ---- 表单（Neo Brutalism: 方角 + 粗边框） ---- */

.gen-row input[type="text"],
.gen-row input[type="number"],
.gen-row select,
.gen-field input[type="text"],
.gen-field input[type="number"],
.gen-field select,
.toolbar input[type="text"],
.rp-modal-field input[type="text"],
.rp-modal-field select {
    height: 44px;
    padding: 6px var(--sp-3);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    color: var(--ink);
    background: var(--canvas);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    transition: none;
    box-sizing: border-box;
}

.gen-row input[type="text"]:hover,
.gen-row input[type="number"]:hover,
.gen-row select:hover,
.gen-field input[type="text"]:hover,
.gen-field input[type="number"]:hover,
.gen-field select:hover,
.toolbar input[type="text"]:hover,
.rp-modal-field input[type="text"]:hover,
.rp-modal-field select:hover {
    border-color: var(--primary);
}

.gen-row input[type="text"]:focus,
.gen-row input[type="number"]:focus,
.gen-row select:focus,
.gen-field input[type="text"]:focus,
.gen-field input[type="number"]:focus,
.gen-field select:focus,
.toolbar input[type="text"]:focus,
.rp-modal-field input[type="text"]:focus,
.rp-modal-field select:focus {
    outline: var(--border-width-thick) solid var(--border-color);
    outline-offset: 2px;
    border-color: var(--border-color);
}

.gen-row input::placeholder,
.gen-field input::placeholder,
.toolbar input::placeholder,
.rp-modal-field input::placeholder {
    color: var(--muted);
}

.gen-row input[type="text"] {
    width: 320px;
}

.gen-row input[type="number"] {
    width: 80px;
    text-align: center;
    font-weight: 600;
}

.gen-row input[type="file"]:not(.file-input-hidden),
.gen-field input[type="file"]:not(.file-input-hidden) {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    border: var(--border-width) dashed var(--border-color);
    border-radius: var(--r-none);
    padding: var(--sp-4) var(--sp-5);
    background: var(--canvas);
    cursor: pointer;
    transition: all 0.1s ease;
    width: 100%;
    text-align: center;
}

.gen-row input[type="file"]:not(.file-input-hidden):hover,
.gen-field input[type="file"]:not(.file-input-hidden):hover {
    border-style: solid;
    background: var(--surface-warm);
    box-shadow: var(--shadow-2);
}

/* 文件输入包装 */
.file-input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    height: 44px;
    padding: var(--sp-2) var(--sp-3);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--canvas);
    width: 100%;
}

.file-input-hidden {
    position: absolute;
    width: 0;
    height: 0;
    padding: 0;
    margin: 0;
    opacity: 0;
    overflow: hidden;
    border: none;
}

.file-input-btn {
    padding: 8px 16px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    color: var(--on-primary);
    background: var(--info);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    cursor: pointer;
    transition: all 0.1s ease;
    white-space: nowrap;
}

.file-input-btn:hover {
    background: var(--info-hover);
    box-shadow: var(--shadow-1);
}

.file-input-name {
    font-size: 13px;
    color: var(--slate);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 复选框 */
.gen-row input[type="checkbox"],
.gen-check input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* 表单行 */
.gen-row {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    margin-top: var(--sp-3);
}

.gen-row label {
    color: var(--ink);
    font-size: 14px;
    font-weight: 600;
    min-width: 48px;
}

.gen-hint {
    font-size: 12px;
    color: var(--stone);
    font-style: italic;
    margin-top: var(--sp-1);
}

/* 选择框 */
select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234A4A4A' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
    cursor: pointer;
}

/* 禁用态 */
input:disabled,
select:disabled,
beadboard-select[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 错误态 */
input.error,
select.error,
beadboard-select.error {
    border-color: var(--danger);
    outline: var(--border-width) solid var(--danger);
    outline-offset: 1px;
}

/* ==========================================================================
   自定义 <beadboard-select> — Neo Brutalism 风格
   ========================================================================== */

/* 隐藏原生 bb-option/bb-optgroup（自定义元素内部禁用浏览器默认渲染） */
beadboard-select > bb-option,
beadboard-select > bb-optgroup {
    display: none !important;
}

/* 触发按钮（下拉模式） */
.bb-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 44px;
    padding: 6px var(--sp-3);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    line-height: 20px;
    color: var(--ink);
    background: var(--canvas);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    cursor: pointer;
    box-sizing: border-box;
    text-align: left;
    gap: var(--sp-2);
}

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

beadboard-select.bb-select-open .bb-select-trigger {
    outline: var(--border-width-thick) solid var(--border-color);
    outline-offset: 2px;
    border-color: var(--border-color);
}

.bb-select-trigger-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.bb-select-arrow {
    flex-shrink: 0;
    font-size: 12px;
    color: var(--slate);
    transition: transform 0.15s ease;
}

beadboard-select.bb-select-open .bb-select-arrow {
    transform: rotate(180deg);
}

/* 下拉面板 */
.bb-select-dropdown {
    position: absolute;
    z-index: 999;
    left: 0;
    right: 0;
    top: 100%;
    margin-top: var(--sp-1);
    background: var(--canvas);
    border: var(--border-width-thick) solid var(--border-color);
    box-shadow: var(--shadow-3);
    max-height: 280px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--canvas);
}

.bb-select-dropdown::-webkit-scrollbar {
    width: 8px;
}
.bb-select-dropdown::-webkit-scrollbar-track {
    background: var(--canvas);
    border-left: var(--border-width) solid var(--border-color);
}
.bb-select-dropdown::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--r-none);
}
.bb-select-dropdown::-webkit-scrollbar-thumb:hover {
    background: var(--ink-deep);
}

/* 列表模式（size 属性） */
.bb-select-listbox {
    border: var(--border-width) solid var(--border-color);
    max-height: 280px;
    overflow-y: auto;
    background: var(--canvas);
}

/* 选项行 — 统一 */
.bb-select-option {
    padding: 8px 12px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: none;
}

.bb-select-option:last-child {
    border-bottom: none;
}

.bb-select-option:hover {
    background: var(--surface-warm);
}

.bb-select-option.selected {
    background: var(--surface-warm);
    font-weight: 700;
    box-shadow: inset 3px 0 0 0 var(--primary);
}

.bb-select-option.highlighted {
    background: var(--surface-warm);
    outline: 1px solid var(--primary);
}

.bb-select-option-erase {
    color: var(--danger);
    font-weight: 600;
}

/* 分组标签 */
.bb-select-group-label {
    padding: 6px 12px 4px;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 700;
    color: var(--stone);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1;
}

/* 禁用态 */
beadboard-select[disabled] .bb-select-trigger {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--surface);
}

beadboard-select[disabled] .bb-select-listbox {
    opacity: 0.6;
    pointer-events: none;
}

/* 下拉模式需要 relative 定位 */
.gen-field beadboard-select:not([size]),
.rp-modal-field beadboard-select:not([size]) {
    position: relative;
    display: block;
}

/* ==========================================================================
   使用帮助弹窗 <beadboard-help> — Neo Brutalism
   ========================================================================== */

.help-btn {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 800;
    line-height: 1;
    color: var(--ink-deep);
    background: var(--canvas);
    border: var(--border-width) solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.1s ease;
}

.help-btn:hover {
    background: var(--warning);
    box-shadow: var(--shadow-1);
}

.help-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.help-modal {
    background: var(--canvas);
    border: var(--border-width-thick) solid var(--border-color);
    box-shadow: var(--shadow-4);
    max-width: 560px;
    width: 100%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.help-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-3) var(--sp-4);
    border-bottom: var(--border-width) solid var(--border-color);
    font-weight: 800;
    font-size: 15px;
    background: var(--primary);
    color: var(--on-primary);
}

.help-close {
    background: var(--canvas);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    color: var(--ink-deep);
    font-size: 18px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    padding: 2px 8px;
}

.help-close:hover {
    background: var(--surface-warm);
}

.help-modal-body {
    overflow-y: auto;
    padding: var(--sp-3) var(--sp-4) var(--sp-4);
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--canvas);
}

.help-modal-body::-webkit-scrollbar {
    width: 8px;
}
.help-modal-body::-webkit-scrollbar-track {
    background: var(--canvas);
    border-left: var(--border-width) solid var(--border-color);
}
.help-modal-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
}
.help-modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--ink-deep);
}

.help-section {
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
}

.help-section summary {
    padding: 8px 12px;
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    background: var(--surface);
    user-select: none;
}

.help-section summary:hover {
    background: var(--surface-warm);
}

.help-section[open] summary {
    border-bottom: var(--border-width) solid var(--border-color);
    background: var(--surface-warm);
}

.help-section-body {
    padding: var(--sp-2) var(--sp-3);
    font-size: 13px;
    line-height: 1.6;
    color: var(--ink);
}

.help-section-body ul,
.help-section-body ol {
    margin: 0;
    padding-left: 18px;
}

.help-section-body li {
    margin: 4px 0;
}

.help-section-body b {
    font-weight: 700;
}

/* ==========================================================================
   自定义 <beadboard-toggle> — Neo Brutalism switch
   ========================================================================== */

beadboard-toggle {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    outline: none;
}

beadboard-toggle:focus-visible {
    outline: var(--border-width-thick) solid var(--primary);
    outline-offset: 3px;
}

.bb-toggle-track {
    position: relative;
    width: 100%;
    height: 44px;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--canvas);
    transition: background 0.1s ease;
    box-sizing: border-box;
}

.bb-toggle-track.bb-toggle-on {
    background: var(--primary);
}

.bb-toggle-track.bb-toggle-disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.bb-toggle-knob {
    position: absolute;
    top: -3px;
    left: -3px;
    width: 50%;
    height: 100%;
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    background: var(--canvas);
    box-shadow: var(--shadow-1);
    transition: left 0.1s ease;
    box-sizing: content-box;
}

.bb-toggle-on .bb-toggle-knob {
    left: auto;
    right: -2px;
}

/* ---- 卡片容器（Neo Brutalism: 白底 + 黑边框 + 硬阴影） ---- */

.toolbar,
.gen-panel,
.legend {
    background: var(--canvas);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    position: relative;
}

/* ---- Toast 消息（Neo Brutalism: 方角 + 粗边框） ---- */

.__toast {
    padding: var(--sp-3) var(--sp-5);
    border-radius: var(--r-none);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.50;
    pointer-events: auto;
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    max-width: 420px;
    word-break: break-word;
    border: var(--border-width) solid var(--border-color);
    box-shadow: var(--shadow-3);
}

.__toast-show {
    opacity: 1;
    transform: translateX(0);
}

.__toast-success {
    background: #D1FAE5;
    color: #065F46;
    border-color: var(--success);
}

.__toast-error {
    background: #FEE2E2;
    color: #991B1B;
    border-color: var(--danger);
}

.__toast-info {
    background: #DBEAFE;
    color: #1E40AF;
    border-color: var(--info);
}

.__toast-loading {
    background: var(--surface-warm);
    color: #92400E;
    border-color: var(--warning);
}

/* ==========================================================================
   查看器页面 (viewer.html) — Neo Brutalism
   ========================================================================== */

/* 查看器根布局 */
beadboard-viewer {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

beadboard-viewer:only-child {
    display: flex;
    flex-direction: column;
    flex: 1;
}

beadboard-viewer:only-child html,
beadboard-viewer:only-child body {
    height: 100%;
    overflow: hidden;
}

/* 全屏 */
.viewer-body:fullscreen {
    background: var(--canvas);
    padding: 0;
}

.viewer-body:fullscreen .viewer-canvas-wrap {
    width: 100vw;
    height: 100vh;
}

/* 全屏按钮 */
.btn-icon {
    background: var(--canvas);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    padding: var(--sp-1) var(--sp-2);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    color: var(--ink);
}

.btn-icon:hover {
    background: var(--surface);
    box-shadow: var(--shadow-1);
}

/* 查看器内容区 */
.viewer-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    background: transparent;
}

.viewer-canvas-wrap {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: var(--canvas);
    border: var(--border-width-thick) solid var(--border-color);
    margin: 8px;
    box-shadow: var(--shadow-2);
}

.viewer-canvas-wrap canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
}

/* 底栏 */
.viewer-footer {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    padding: var(--sp-2) var(--sp-4);
    border-top: var(--border-width-thick) solid var(--border-color);
    background: var(--canvas);
    font-size: 13px;
    color: var(--slate);
}

.viewer-footer input[type="range"] {
    width: 140px;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, var(--primary) 0%, var(--primary) var(--bb-fill, 50%), var(--canvas) var(--bb-fill, 50%), var(--canvas) 100%);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    outline: none;
    cursor: pointer;
    box-sizing: border-box;
}

.viewer-footer input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 24px;
    background: var(--canvas);
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    cursor: pointer;
    box-shadow: var(--shadow-1);
}

.viewer-footer input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 24px;
    background: var(--canvas);
    border: var(--border-width-thick) solid var(--border-color);
    border-radius: var(--r-none);
    cursor: pointer;
    box-shadow: var(--shadow-1);
}

.viewer-footer input[type="range"]::-moz-range-progress {
    height: 100%;
    background: var(--primary);
    border: none;
    border-radius: var(--r-none);
}

.viewer-footer input[type="range"]::-moz-range-track {
    height: 8px;
    background: var(--canvas);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
}

.viewer-sep {
    color: var(--border-color);
    font-weight: 800;
}

#viewer-dimension {
    font-weight: 700;
}

.viewer-info-link {
    color: var(--slate);
    text-decoration: underline;
    text-decoration-style: solid;
    cursor: pointer;
    font-weight: 600;
}

.viewer-info-link:hover {
    color: var(--primary);
}

/* 图例弹窗 - 底部抽屉 */
.legend-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0);
    transition: background 0.2s ease;
    pointer-events: none;
}

.legend-overlay.legend-visible {
    background: rgba(0,0,0,0.4);
    pointer-events: auto;
}

.legend-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-radius: 0;
    border-top: var(--border-width-thick) solid var(--border-color);
    box-shadow: 0 -8px 0 var(--border-color);
    max-height: 65vh;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.2s ease;
}

.legend-overlay.legend-visible .legend-sheet {
    transform: translateY(0);
}

.legend-drag-bar {
    width: 36px;
    height: 4px;
    border-radius: 0;
    background: var(--primary);
    margin: 8px auto 0;
    flex-shrink: 0;
}

.legend-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px 4px;
    flex-shrink: 0;
}

.legend-title {
    font-weight: 800;
    font-size: 15px;
    color: var(--ink-deep);
}

.legend-close {
    background: none;
    border: var(--border-width) solid var(--border-color);
    font-size: 18px;
    cursor: pointer;
    color: var(--ink);
    padding: 2px 8px;
    line-height: 1;
}

.legend-close:hover {
    background: var(--surface);
    box-shadow: var(--shadow-1);
}

.legend-body {
    overflow-y: auto;
    padding: 8px 12px 16px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    align-content: flex-start;
}

.legend-card {
    flex: 0 0 calc(20% - 7px);
    min-width: 72px;
    max-width: 100px;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--r-none);
    padding: 6px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
}

.legend-card-swatch {
    width: 100%;
    height: 28px;
    border-radius: var(--r-none);
    border: var(--border-width) solid var(--border-color);
    flex-shrink: 0;
}

.legend-card-code {
    font-weight: 700;
    font-size: 12px;
    color: var(--ink);
    line-height: 1.2;
}

.legend-card-count {
    font-size: 11px;
    font-weight: 600;
    color: var(--stone);
    line-height: 1.2;
}