:root {
    --tu-font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
    --tu-mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Menlo, Consolas, monospace;
    --tu-radius: 12px;
    --tu-radius-sm: 8px;
    --tu-max: 1180px;
    --tu-space: 16px;
    --tu-speed: 140ms;
}

html[data-theme="light"] {
    color-scheme: light;
    --tu-bg: #f6f7fb;
    --tu-surface: #ffffff;
    --tu-surface-2: #f1f3f9;
    --tu-fg: #1c2333;
    --tu-muted: #5d6785;
    --tu-border: #dfe3ee;
    --tu-accent: #4f46e5;
    --tu-accent-fg: #ffffff;
    --tu-accent-soft: #eceafe;
    --tu-chip: #eef1f8;
    --tu-success: #118a5b;
    --tu-error: #cf2f3d;
    --tu-warning: #b7760a;
    --tu-shadow: 0 1px 2px rgba(20, 26, 46, .07), 0 6px 18px rgba(20, 26, 46, .06);
    --tu-editor-bg: #ffffff;
    --tu-editor-fg: #1c2333;
    --tu-editor-gutter: #f3f4f9;
    --tu-editor-active: #e7e9f3;
    --tu-editor-font: 14px;
    --tu-selection: #cdd7ff;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --tu-bg: #0f1320;
    --tu-surface: #171c2c;
    --tu-surface-2: #1e2436;
    --tu-fg: #e7eaf3;
    --tu-muted: #9aa4c0;
    --tu-border: #2a3148;
    --tu-accent: #8b8bff;
    --tu-accent-fg: #10131f;
    --tu-accent-soft: #232a45;
    --tu-chip: #232a45;
    --tu-success: #45c99a;
    --tu-error: #ff7b8a;
    --tu-warning: #f2c14e;
    --tu-shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .35);
    --tu-editor-bg: #121727;
    --tu-editor-fg: #e7eaf3;
    --tu-editor-gutter: #171c2c;
    --tu-editor-active: #242b40;
    --tu-editor-font: 14px;
    --tu-selection: #36406b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--tu-font);
    color: var(--tu-fg);
    background: var(--tu-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--tu-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.25; margin: 0 0 .4em; }

code, pre { font-family: var(--tu-mono); }

.tu-container { width: 100%; max-width: var(--tu-max); margin: 0 auto; padding: 0 20px; }
.tu-main { min-height: 62vh; }
.tu-muted { color: var(--tu-muted); }

.tu-skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    z-index: 50;
    background: var(--tu-accent);
    color: var(--tu-accent-fg);
    padding: 10px 16px;
    border-radius: 0 0 var(--tu-radius-sm) 0;
}
.tu-skip-link:focus { left: 0; }

.tu-icon { width: 20px; height: 20px; flex: 0 0 auto; }

/* ---------- Header ---------- */
.tu-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: color-mix(in srgb, var(--tu-surface) 92%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--tu-border);
}
.tu-header__inner { display: flex; align-items: center; gap: 16px; min-height: 64px; }

.tu-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--tu-fg); }
.tu-brand:hover { text-decoration: none; }
.tu-brand__icon { width: 26px; height: 26px; color: var(--tu-accent); }
.tu-brand__text { font-size: 1.05rem; letter-spacing: -.01em; }

.tu-search { position: relative; flex: 1 1 auto; max-width: 520px; display: flex; align-items: center; }
.tu-search__icon { position: absolute; left: 12px; color: var(--tu-muted); }
.tu-search__input {
    width: 100%;
    padding: 9px 14px 9px 40px;
    border: 1px solid var(--tu-border);
    border-radius: 999px;
    background: var(--tu-surface-2);
    color: var(--tu-fg);
    font: inherit;
}
.tu-search__input:focus { outline: 2px solid var(--tu-accent); outline-offset: 1px; background: var(--tu-surface); }

.tu-search__results {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: var(--tu-surface);
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius);
    box-shadow: var(--tu-shadow);
    padding: 6px;
    max-height: 60vh;
    overflow: auto;
    z-index: 40;
}
.tu-search__item { display: block; padding: 8px 10px; border-radius: var(--tu-radius-sm); color: var(--tu-fg); }
.tu-search__item:hover { background: var(--tu-accent-soft); text-decoration: none; }
.tu-search__name { display: block; font-weight: 600; }
.tu-search__desc { display: block; font-size: .84rem; color: var(--tu-muted); }
.tu-search__empty { padding: 10px; color: var(--tu-muted); }

.tu-header__actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

.tu-iconbtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface);
    color: var(--tu-fg);
    cursor: pointer;
    transition: background var(--tu-speed), border-color var(--tu-speed);
}
.tu-iconbtn:hover { background: var(--tu-surface-2); }
.tu-iconbtn.is-active { color: var(--tu-accent); border-color: var(--tu-accent); }

.tu-lang {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 8px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface-2);
    height: 38px;
    transition: border-color var(--tu-speed), background var(--tu-speed);
}
.tu-lang:hover, .tu-lang:focus-within { border-color: var(--tu-accent); }
.tu-lang .tu-icon { width: 18px; height: 18px; color: var(--tu-muted); }
.tu-lang select {
    border: 0;
    background: transparent;
    color: var(--tu-fg);
    font: inherit;
    font-weight: 500;
    cursor: pointer;
    padding: 0 2px;
}
.tu-lang select option { background: var(--tu-surface); color: var(--tu-fg); }
.tu-lang select:focus { outline: none; }

.tu-nav-toggle { display: none; }

.tu-nav { border-top: 1px solid var(--tu-border); }
.tu-nav__inner { display: flex; flex-wrap: wrap; gap: 4px 18px; padding-top: 8px; padding-bottom: 8px; }
.tu-nav__link { color: var(--tu-muted); font-weight: 500; font-size: .94rem; padding: 4px 0; }
.tu-nav__link:hover, .tu-nav__link--strong { color: var(--tu-accent); }

/* ---------- Hero ---------- */
.tu-hero {
    background:
        radial-gradient(1100px 320px at 50% -120px, var(--tu-accent-soft), transparent 70%),
        var(--tu-surface);
    border-bottom: 1px solid var(--tu-border);
    padding: 60px 0 48px;
    text-align: center;
}
.tu-hero__title { font-size: clamp(1.9rem, 3.6vw, 2.9rem); letter-spacing: -.02em; }
.tu-hero__subtitle { max-width: 680px; margin: 0 auto; color: var(--tu-muted); font-size: 1.05rem; }
.tu-search--hero { max-width: 620px; margin: 26px auto 12px; }
.tu-search--hero .tu-search__input { padding-top: 14px; padding-bottom: 14px; font-size: 1.02rem; }
.tu-hero__meta { color: var(--tu-muted); font-size: .92rem; margin: 0; }

/* ---------- Sections & grids ---------- */
.tu-section { padding: 34px 0; }
.tu-section__head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.tu-section__title { font-size: 1.35rem; margin: 0; }
.tu-link { font-weight: 600; font-size: .92rem; }

.tu-grid { display: grid; gap: 14px; }
.tu-grid--cards { grid-template-columns: repeat(auto-fill, minmax(248px, 1fr)); }

.tu-card {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px 16px;
    background: var(--tu-surface);
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius);
    color: var(--tu-fg);
    box-shadow: var(--tu-shadow);
    transition: transform var(--tu-speed), border-color var(--tu-speed);
}
.tu-card:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--tu-accent); }
.tu-card__icon { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; border-radius: 10px; background: var(--tu-accent-soft); color: var(--tu-accent); }
.tu-card__body { min-width: 0; }
.tu-card__name { display: block; font-weight: 600; }
.tu-card__desc { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; font-size: .87rem; color: var(--tu-muted); }

.tu-category { margin-bottom: 34px; }
.tu-category__head { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; align-items: center; margin-bottom: 14px; }
.tu-category__icon { display: inline-flex; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: 10px; background: var(--tu-chip); color: var(--tu-accent); grid-row: span 2; }
.tu-category__title { font-size: 1.15rem; margin: 0; }
.tu-category__desc { margin: 0; font-size: .9rem; }

/* ---------- Page ---------- */
.tu-page { padding: 24px 0 48px; }
.tu-page__head { margin-bottom: 22px; }
.tu-page__title { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -.02em; }
.tu-page__intro { margin: 0; max-width: 720px; }
.tu-page--content { max-width: 820px; }
.tu-prose { font-size: 1.02rem; }
.tu-empty { padding: 32px; text-align: center; color: var(--tu-muted); background: var(--tu-surface); border: 1px dashed var(--tu-border); border-radius: var(--tu-radius); }

.tu-breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0 0 14px; padding: 0; font-size: .87rem; color: var(--tu-muted); }
.tu-breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 6px; color: var(--tu-border); }
.tu-breadcrumb a { color: var(--tu-muted); }
.tu-breadcrumb [aria-current] { color: var(--tu-fg); font-weight: 500; }

.tu-error { text-align: center; padding-top: 60px; }
.tu-error__code { font-size: clamp(3rem, 9vw, 5.5rem); font-weight: 800; color: var(--tu-accent); margin: 0; line-height: 1; }
.tu-error__request { font-size: .85rem; margin-top: 18px; }

/* ---------- Tool workspace ---------- */
.tu-tool { padding: 24px 0 56px; }
.tu-tool__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.tu-tool__titlewrap { display: flex; align-items: center; gap: 14px; }
.tu-tool__icon { display: inline-flex; width: 52px; height: 52px; align-items: center; justify-content: center; border-radius: 14px; background: var(--tu-accent-soft); color: var(--tu-accent); }
.tu-tool__icon .tu-icon { width: 26px; height: 26px; }
.tu-tool__title { font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 0; letter-spacing: -.02em; }
.tu-tool__category { margin: 2px 0 0; font-size: .88rem; }
.tu-tool__desc { max-width: 820px; color: var(--tu-muted); font-size: 1.02rem; }
.tu-fav.is-active { color: var(--tu-accent); border-color: var(--tu-accent); }

.tu-workspace {
    margin-top: 18px;
    background: var(--tu-surface);
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius);
    box-shadow: var(--tu-shadow);
    overflow: hidden;
}
.tu-tool.is-busy .tu-workspace { opacity: .85; }

.tu-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--tu-border);
    background: var(--tu-surface-2);
}
.tu-toolbar__actions { display: flex; flex-wrap: wrap; gap: 8px; }
.tu-toolbar__options { display: flex; flex-wrap: wrap; gap: 14px; margin-left: auto; }

.tu-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 14px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface);
    color: var(--tu-fg);
    font: inherit;
    font-weight: 600;
    font-size: .9rem;
    cursor: pointer;
    transition: background var(--tu-speed), border-color var(--tu-speed), transform var(--tu-speed);
}
.tu-btn:hover { border-color: var(--tu-accent); color: var(--tu-accent); }
.tu-btn:active { transform: translateY(1px); }
.tu-btn .tu-icon { width: 17px; height: 17px; }
.tu-btn--action.is-active { border-color: var(--tu-accent); color: var(--tu-accent); }
.tu-btn--ghost { padding: 4px 8px; font-size: .8rem; font-weight: 500; }

.tu-field { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; color: var(--tu-muted); }
.tu-field--inline { flex-direction: row; align-items: center; gap: 8px; }
.tu-select, .tu-input {
    padding: 7px 10px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface);
    color: var(--tu-fg);
    font: inherit;
}
.tu-hint { margin: 0; font-size: .8rem; color: var(--tu-muted); }

.tu-status { padding: 0 16px; font-size: .9rem; }
.tu-status:not(:empty) { padding: 10px 16px; border-bottom: 1px solid var(--tu-border); }
.tu-status--success { color: var(--tu-success); background: color-mix(in srgb, var(--tu-success) 10%, transparent); }
.tu-status--error { color: var(--tu-error); background: color-mix(in srgb, var(--tu-error) 10%, transparent); }
.tu-status--warning { color: var(--tu-warning); background: color-mix(in srgb, var(--tu-warning) 12%, transparent); }
.tu-status--info { color: var(--tu-muted); }

.tu-panels { display: grid; gap: 0; }
.tu-panels--editor, .tu-panels--preview { grid-template-columns: 1fr 1fr; }
.tu-panels--tree { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.tu-panels--compare { grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; }
.tu-panels--compare #tu-panel-output { grid-column: 1 / -1; }
.tu-panels--generator { grid-template-columns: 300px minmax(0, 1fr); }

.tu-panel { display: flex; flex-direction: column; min-width: 0; border-right: 1px solid var(--tu-border); }
.tu-panel:last-child { border-right: 0; }
.tu-panels--compare #tu-panel-output { border-right: 0; border-top: 1px solid var(--tu-border); }
.tu-panel--custom { padding: 18px; }
.tu-panel--options { padding: 16px; gap: 12px; background: var(--tu-surface-2); }

.tu-panel__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 14px; border-bottom: 1px solid var(--tu-border); }
.tu-panel__title { font-size: .84rem; text-transform: uppercase; letter-spacing: .05em; color: var(--tu-muted); margin: 0; font-weight: 700; }

.tu-editor { height: 420px; overflow: hidden; }
.tu-editor .cm-editor { height: 100%; }

.tu-output #tu-tree-host { display: none; }
.tu-output--tree #tu-editor-output { display: none; }
.tu-output--tree #tu-tree-host { display: block; }

.tu-tabs { display: inline-flex; gap: 4px; background: var(--tu-chip); padding: 3px; border-radius: 999px; }
.tu-tab { border: 0; background: transparent; color: var(--tu-muted); font: inherit; font-size: .82rem; padding: 4px 12px; border-radius: 999px; cursor: pointer; }
.tu-tab.is-active { background: var(--tu-surface); color: var(--tu-fg); box-shadow: var(--tu-shadow); }

.tu-tree { height: 420px; overflow: auto; padding: 10px 12px; font-family: var(--tu-mono); font-size: .86rem; background: var(--tu-editor-bg); color: var(--tu-editor-fg); }
.tu-tree__branch { }
.tu-tree__row { display: flex; align-items: baseline; gap: 6px; padding: 1px 0; }
.tu-tree__row--child { margin-left: 8px; }
.tu-tree__toggle { border: 0; background: transparent; color: var(--tu-muted); cursor: pointer; width: 16px; padding: 0; font-size: .8rem; }
.tu-tree__toggle:disabled { opacity: .4; }
.tu-tree__key { color: var(--tu-accent); }
.tu-tree__tag { color: var(--tu-accent); font-weight: 600; }
.tu-tree__attr { color: var(--tu-warning); }
.tu-tree__type, .tu-tree__value { color: var(--tu-muted); }
.tu-tree__value--string, .tu-tree__type--string { color: var(--tu-success); }
.tu-tree__value--number, .tu-tree__type--number { color: #c76a00; }
.tu-tree__value--boolean, .tu-tree__type--boolean { color: var(--tu-accent); }
.tu-tree__value--null, .tu-tree__type--null { color: var(--tu-muted); font-style: italic; }
.tu-tree__copy { border: 0; background: transparent; color: var(--tu-muted); cursor: pointer; opacity: 0; }
.tu-tree__row:hover .tu-tree__copy { opacity: 1; }
.tu-tree__children { border-left: 1px dashed var(--tu-border); margin-left: 7px; padding-left: 8px; }

.tu-preview__frame { width: 100%; height: 420px; border: 0; background: #fff; }

.tu-tool.is-fullscreen .tu-workspace { position: fixed; inset: 0; z-index: 60; margin: 0; border-radius: 0; display: flex; flex-direction: column; }
.tu-tool.is-fullscreen .tu-panels { flex: 1 1 auto; }
.tu-tool.is-fullscreen .tu-editor, .tu-tool.is-fullscreen .tu-tree, .tu-tool.is-fullscreen .tu-preview__frame { height: 100%; min-height: 300px; }

/* ---------- Color tool ---------- */
.tu-color { display: grid; gap: 18px; max-width: 560px; }
.tu-color__head { display: flex; align-items: center; gap: 12px; }
.tu-color__input { flex: 1 1 auto; }
.tu-color__swatch { width: 52px; height: 52px; border-radius: 12px; border: 1px solid var(--tu-border); background: #3b82f6; }
.tu-color__output { display: grid; gap: 8px; }
.tu-color__row { display: flex; align-items: center; gap: 12px; padding: 8px 12px; background: var(--tu-surface-2); border: 1px solid var(--tu-border); border-radius: var(--tu-radius-sm); }
.tu-color__label { width: 52px; font-size: .78rem; font-weight: 700; color: var(--tu-muted); }
.tu-color__row code { flex: 1 1 auto; font-size: .9rem; }
.tu-error { color: var(--tu-error); }

/* ---------- Content ---------- */
.tu-content { margin-top: 34px; max-width: 860px; }
.tu-content__title { font-size: 1.25rem; margin-bottom: 12px; }
.tu-guide { margin-bottom: 16px; }
.tu-guide h3 { font-size: 1rem; margin-bottom: 4px; }
.tu-guide__steps { margin: 8px 0 0; padding-left: 20px; }
.tu-faq__item { border: 1px solid var(--tu-border); border-radius: var(--tu-radius-sm); padding: 12px 14px; margin-bottom: 8px; background: var(--tu-surface); }
.tu-faq__item summary { cursor: pointer; font-weight: 600; }
.tu-faq__item p { margin: 8px 0 0; color: var(--tu-muted); }

/* ---------- Footer ---------- */
.tu-footer { margin-top: 48px; border-top: 1px solid var(--tu-border); background: var(--tu-surface); }
.tu-footer__grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 28px; padding: 40px 20px 28px; }
.tu-footer__brand .tu-muted { margin-top: 8px; font-size: .9rem; max-width: 320px; }
.tu-footer__title { font-size: .82rem; text-transform: uppercase; letter-spacing: .06em; color: var(--tu-muted); margin-bottom: 10px; }
.tu-footer__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: .92rem; }
.tu-footer__list a { color: var(--tu-fg); }
.tu-footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding: 16px 20px 28px; border-top: 1px solid var(--tu-border); font-size: .85rem; color: var(--tu-muted); }
.tu-footer__bottom p { margin: 0; }

/* ---------- Toasts ---------- */
.tu-toasts { position: fixed; right: 18px; bottom: 18px; z-index: 80; display: grid; gap: 8px; }
.tu-toast { padding: 10px 16px; border-radius: var(--tu-radius-sm); background: var(--tu-fg); color: var(--tu-bg); box-shadow: var(--tu-shadow); font-size: .9rem; transition: opacity var(--tu-speed), transform var(--tu-speed); }
.tu-toast--success { background: var(--tu-success); color: #fff; }
.tu-toast--error { background: var(--tu-error); color: #fff; }
.tu-toast--warning { background: var(--tu-warning); color: #1c2333; }
.tu-toast--hide { opacity: 0; transform: translateY(6px); }

/* ---------- Custom tool UIs ---------- */
.tu-form { display: grid; gap: 12px; }
.tu-form--cols { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.tu-field > span { font-size: .8rem; color: var(--tu-muted); }
.tu-textarea {
    width: 100%;
    min-height: 110px;
    padding: 10px 12px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-editor-bg);
    color: var(--tu-editor-fg);
    font-family: var(--tu-mono);
    font-size: .9rem;
    line-height: 1.5;
    resize: vertical;
}
.tu-textarea:focus { outline: 2px solid var(--tu-accent); outline-offset: 1px; }
.tu-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.tu-checklist { display: flex; flex-wrap: wrap; gap: 14px; }
.tu-check { display: inline-flex; align-items: center; gap: 6px; font-size: .88rem; color: var(--tu-fg); }
.tu-check input { accent-color: var(--tu-accent); }
.tu-output-box {
    margin: 0;
    padding: 12px 14px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-editor-bg);
    color: var(--tu-editor-fg);
    font-family: var(--tu-mono);
    font-size: .9rem;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 380px;
    overflow: auto;
}
.tu-stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
.tu-stat {
    padding: 12px 14px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface-2);
}
.tu-stat__value { display: block; font-size: 1.5rem; font-weight: 700; line-height: 1.2; }
.tu-stat__label { display: block; font-size: .78rem; color: var(--tu-muted); }
.tu-qr {
    display: grid;
    place-items: center;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius);
    min-height: 120px;
}
.tu-qr img, .tu-qr canvas { display: block; max-width: 100%; height: auto; image-rendering: pixelated; }
.tu-table-scroll { max-height: 520px; overflow: auto; border: 1px solid var(--tu-border); border-radius: var(--tu-radius-sm); }
.tu-table { width: 100%; border-collapse: collapse; font-family: var(--tu-mono); font-size: .85rem; }
.tu-table th, .tu-table td { border: 1px solid var(--tu-border); padding: 4px 10px; text-align: left; }
.tu-table thead th { position: sticky; top: 0; background: var(--tu-surface-2); z-index: 1; }
.tu-case-list { display: grid; gap: 8px; }
.tu-case-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    background: var(--tu-surface-2);
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
}
.tu-case-row__label { width: 96px; font-size: .76rem; font-weight: 700; color: var(--tu-muted); text-transform: uppercase; letter-spacing: .04em; }
.tu-case-row__value { flex: 1 1 auto; overflow: auto; white-space: nowrap; }
.tu-mono { font-family: var(--tu-mono); }
.tu-preview-box {
    display: grid;
    place-items: center;
    min-height: 160px;
    padding: 24px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius);
    background: var(--tu-surface-2);
}
.tu-preview-box > * { max-width: 100%; }
.tu-swatch-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 10px; }
.tu-swatch {
    display: grid;
    gap: 0;
    padding: 0;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface);
    color: var(--tu-fg);
    cursor: pointer;
    overflow: hidden;
}
.tu-swatch:hover, .tu-swatch:focus-visible { border-color: var(--tu-accent); }
.tu-swatch__color { display: block; height: 64px; }
.tu-swatch__label { padding: 6px 8px; font-size: .75rem; }
.tu-badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .75rem; font-weight: 700; vertical-align: middle; }
.tu-badge--pass { background: #dcfce7; color: #166534; }
.tu-badge--fail { background: #fee2e2; color: #991b1b; }
.tu-range { width: 100%; accent-color: var(--tu-accent); }
.tu-stat__value { overflow-wrap: anywhere; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .tu-panels--editor, .tu-panels--tree, .tu-panels--preview, .tu-panels--compare, .tu-panels--generator { grid-template-columns: 1fr; }
    .tu-panel { border-right: 0; border-bottom: 1px solid var(--tu-border); }
    .tu-panel:last-child { border-bottom: 0; }
    .tu-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
    .tu-search { order: 3; max-width: none; flex-basis: 100%; }
    .tu-header__inner { flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
    .tu-nav-toggle { display: inline-flex; }
    .tu-nav { display: none; }
    .tu-nav.is-open { display: block; }
    .tu-hero { padding: 40px 0 32px; }
    .tu-toolbar__options { margin-left: 0; }
    .tu-editor, .tu-tree, .tu-preview__frame { height: 320px; }
}

@media (max-width: 520px) {
    .tu-footer__grid { grid-template-columns: 1fr; }
    .tu-toolbar__actions { width: 100%; }
    .tu-btn--action span { display: none; }
    .tu-brand__text { display: none; }
}

/* ---------- Media thumbnails ---------- */
.tu-thumb-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    margin-top: 14px;
}

.tu-thumb {
    margin: 0;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    overflow: hidden;
    background: var(--tu-surface);
}

.tu-thumb img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: var(--tu-surface-2);
}

.tu-thumb figcaption {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    font-size: .85rem;
    color: var(--tu-muted);
}

/* ---------- Office tools ---------- */
.tu-office-list {
    margin: 6px 0 0;
    padding-left: 22px;
    display: grid;
    gap: 4px;
    font-size: .95rem;
}

.tu-draw-mode {
    margin: 0;
    padding: 0;
    border: 0;
}

.tu-draw-mode legend {
    margin-bottom: 4px;
    padding: 0;
    font-size: .8rem;
    color: var(--tu-muted);
}

.tu-draw-section {
    display: grid;
    gap: 8px;
}

.tu-quick-options {
    display: contents;
}

#tu-draw-latest {
    scroll-margin-top: 96px;
}

body.tu-modal-open {
    overflow: hidden;
}

.tu-random-modal {
    position: fixed;
    inset: 0;
    width: min(560px, calc(100vw - 28px));
    max-width: none;
    max-height: calc(100vh - 28px);
    margin: auto;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--tu-fg);
    overflow: visible;
}

.tu-random-modal::backdrop {
    background: rgba(9, 13, 27, .6);
    backdrop-filter: blur(8px);
    animation: tu-modal-backdrop .3s ease both;
}

.tu-random-modal__panel {
    position: relative;
    max-height: calc(100vh - 28px);
    padding: 26px 24px 20px;
    border: 1px solid var(--tu-border);
    border-radius: 24px;
    background: linear-gradient(180deg, var(--tu-surface), var(--tu-surface-2));
    box-shadow: 0 30px 90px rgba(10, 15, 35, .35), 0 2px 10px rgba(10, 15, 35, .15);
    overflow: auto;
    text-align: center;
}

.tu-random-modal[open] .tu-random-modal__panel {
    animation: tu-modal-in .38s cubic-bezier(.2, .8, .2, 1) both;
}

.tu-random-modal__close {
    position: absolute;
    z-index: 5;
    top: 14px;
    right: 14px;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    padding: 0;
    border: 1px solid var(--tu-border);
    border-radius: 50%;
    background: var(--tu-surface-2);
    color: var(--tu-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: color var(--tu-speed), background var(--tu-speed);
}

.tu-random-modal__close:hover {
    background: var(--tu-chip);
    color: var(--tu-fg);
}

.tu-random-modal__close:disabled {
    cursor: default;
    opacity: .35;
}

.tu-random-modal__eyebrow {
    position: relative;
    z-index: 2;
    margin: 0 0 4px;
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--tu-muted);
}

.tu-random-modal__meta {
    position: relative;
    z-index: 2;
    min-height: 1.25em;
    margin: 0;
    color: var(--tu-muted);
    font-size: .85rem;
}

.tu-random-modal__stage {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    min-height: 260px;
    margin: 12px 0 16px;
    padding: 20px 4px;
    border-radius: 20px;
    background: radial-gradient(circle at 50% 50%, var(--tu-accent-soft), transparent 68%);
    box-shadow: inset 0 0 0 1px var(--tu-border);
    overflow: hidden;
    isolation: isolate;
}

.tu-random-modal__ring {
    position: absolute;
    z-index: -1;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent 0 18%, var(--tu-accent) 30%, transparent 44% 100%);
    opacity: .25;
    animation: tu-modal-orbit 2.2s linear infinite;
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 10px), #000 calc(100% - 9px));
    mask: radial-gradient(farthest-side, transparent calc(100% - 10px), #000 calc(100% - 9px));
}

.tu-random-modal.is-revealed .tu-random-modal__ring {
    opacity: .16;
    animation-duration: 9s;
}

.tu-random-modal__result {
    position: relative;
    z-index: 1;
    width: 100%;
    max-height: 240px;
    margin: 0;
    padding: 4px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 10px;
    list-style: none;
    overflow: auto;
}

.tu-random-modal__result li {
    padding: 10px 16px;
    min-width: 60px;
    border: 1px solid var(--tu-border);
    border-radius: 14px;
    background: var(--tu-surface);
    box-shadow: var(--tu-shadow);
    font-size: clamp(1.25rem, 4vw, 1.8rem);
    font-weight: 700;
    line-height: 1.15;
    overflow-wrap: anywhere;
    font-variant-numeric: tabular-nums;
}

.tu-random-modal__result li:only-child {
    padding: 16px 26px;
    font-size: clamp(1.8rem, 6vw, 2.6rem);
}

.tu-random-modal.is-spinning .tu-random-modal__result li {
    color: var(--tu-muted);
    filter: blur(.7px);
    animation: tu-modal-flicker .16s linear infinite alternate;
}

.tu-random-modal.is-spinning .tu-random-modal__result li:nth-child(even) {
    animation-delay: .07s;
}

.tu-random-modal.is-revealed .tu-random-modal__result li {
    animation: tu-modal-pop .55s cubic-bezier(.2, .9, .25, 1.2) both;
    animation-delay: calc(var(--i, 0) * 80ms);
}

.tu-random-modal__confetti {
    position: absolute;
    z-index: 3;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.tu-random-modal__confetti-piece {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 13px;
    border-radius: 2px;
    background: var(--c);
    opacity: 0;
    animation: tu-modal-confetti var(--d) ease-out var(--delay) forwards;
}

.tu-random-modal__done {
    position: relative;
    z-index: 4;
    width: 100%;
}

@keyframes tu-modal-backdrop {
    from {
        opacity: 0;
    }
}

@keyframes tu-modal-in {
    from {
        opacity: 0;
        transform: translateY(12px) scale(.92);
    }
}

@keyframes tu-modal-orbit {
    to {
        transform: rotate(360deg);
    }
}

@keyframes tu-modal-flicker {
    from {
        opacity: .4;
        transform: translateY(-2px) scale(.97);
    }

    to {
        opacity: 1;
        transform: translateY(2px) scale(1.02);
    }
}

@keyframes tu-modal-pop {
    0% {
        opacity: 0;
        transform: scale(.55) rotate(-4deg);
    }

    65% {
        opacity: 1;
        transform: scale(1.06) rotate(1deg);
    }

    100% {
        opacity: 1;
        transform: none;
    }
}

@keyframes tu-modal-confetti {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(.3) rotate(0);
    }

    12% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translate(calc(-50% + var(--x)), calc(-50% + var(--y))) rotate(var(--r)) scale(.7);
    }
}

@media (max-width: 520px) {
    .tu-random-modal__panel {
        padding: 24px 16px 16px;
        border-radius: 20px;
    }

    .tu-random-modal__stage {
        min-height: 220px;
    }

    .tu-random-modal__eyebrow {
        font-size: .7rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tu-random-modal::backdrop,
    .tu-random-modal[open] .tu-random-modal__panel,
    .tu-random-modal__ring,
    .tu-random-modal__result li {
        animation: none;
    }

    .tu-random-modal__confetti {
        display: none;
    }
}

.tu-draw-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.tu-draw-title {
    margin: 0;
    font-size: .95rem;
}

.tu-draw-history {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 8px;
    max-height: 440px;
    overflow: auto;
}

.tu-draw-history__item {
    padding: 10px 12px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface-2);
}

.tu-draw-history__meta {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 6px;
    font-size: .8rem;
    color: var(--tu-muted);
}

.tu-draw-history__time {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.tu-draw-history__mode {
    padding: 1px 6px;
    border: 1px solid var(--tu-border);
    border-radius: 999px;
    background: var(--tu-surface);
    font-size: .7rem;
}

.tu-draw-history__winners {
    margin: 0;
    padding-left: 18px;
    display: grid;
    gap: 2px;
    font-size: .9rem;
}

.tu-signature-preview {
    padding: 16px;
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: #ffffff;
    color: #1f2937;
    overflow: auto;
}

.tu-image-preview {
    display: block;
    max-width: 100%;
    max-height: 320px;
    height: auto;
    border-radius: var(--tu-radius-sm);
}

.tu-docx-preview {
    border: 1px solid var(--tu-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-surface-2);
    overflow: auto;
}

.tu-docx-frame {
    display: block;
    width: 100%;
    min-height: 320px;
    border: 0;
    background: #ffffff;
}

.is-hidden {
    display: none !important;
}