:root {
  color-scheme: light;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  /* Match the palette shipped in editor/assets/index-qbbm8uB9.css. */
  --hit: #166183;
  --hit-orange: #fc9000;
  --orange: #ef8a00;
  --orange-ink: #b06300;
  --orange-soft: #fff1df;
  --chip-math-fg: #9a5600;
  --bg: #f3f3f3;
  --panel: #fff;
  --panel-2: #f8f9fa;
  --ink: #202020;
  --ink-2: #3a3f44;
  --muted: #6b7378;
  --line: #e3e6e8;
  --line-2: #d3d8dc;
  --accent: var(--hit);
  --accent-ink: #114d68;
  --accent-soft: #e7eff3;
  --accent-soft-2: #d4e3ea;
  --shadow-1: 0 1px 2px #141e280f, 0 1px 1px #141e280a;
  --shadow-2: 0 8px 28px #141e2824, 0 2px 6px #141e280f;
  --overlay: rgba(0, 0, 0, .4);

  --navy: var(--accent-ink);
  --navy-dark: var(--accent-ink);
  --gold: var(--hit-orange);
  --selection-gold: #d5ab63;
  --card: var(--panel);
  --border: var(--line);
  --text: var(--ink);
  --accent-hover: var(--accent-ink);
  --on-accent: #fff;
  --heading: var(--ink);
  --secondary: var(--ink-2);
  --control-text: var(--ink-2);
  --control-border: var(--line-2);
  --hover: var(--panel-2);
  --hover-border: var(--muted);
  --soft: var(--accent-soft);
  --disabled-bg: var(--panel-2);
  --disabled-text: var(--muted);
  --subtle: var(--muted);
  --gold-text: var(--chip-math-fg);
  --toolbar: var(--panel);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --orange: #ff9d1f;
  --orange-ink: #ffb95c;
  --orange-soft: #fc900029;
  --chip-math-fg: #ffb95c;
  --bg: #1e1e1e;
  --panel: #252526;
  --panel-2: #2d2d2d;
  --ink: #d4d4d4;
  --ink-2: #b8bcc2;
  --muted: #8b9198;
  --line: #3a3a3a;
  --line-2: #474747;
  --accent: #4e9fc9;
  --accent-ink: #8ccbea;
  --accent-soft: #16618347;
  --accent-soft-2: #16618373;
  --shadow-1: 0 1px 2px #0006;
  --shadow-2: 0 12px 32px #0000008c, 0 2px 6px #00000059;
  --overlay: rgba(0, 0, 0, .5);
  --on-accent: var(--bg);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body {
  margin: 0; color: var(--text); background: var(--bg);
  min-height: 100vh; display: flex; flex-direction: column;
  font: 15px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--navy); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 4px; }
button, input { font: inherit; }
.button, .button-quiet, .editor-entry { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; border: 1px solid var(--control-border); border-radius: 5px; padding: 10px 16px; font-family: inherit; font-size: 13px; font-weight: 500; line-height: 1.5; white-space: nowrap; cursor: pointer; transition: background-color .15s, border-color .15s, color .15s; }
.button { color: var(--navy); background: var(--card); }
.button:hover, .editor-entry:hover { text-decoration: none; }
.button-quiet { padding: 8px 10px; border-color: transparent; background: transparent; color: var(--muted); }
.button-quiet:hover:not(:disabled) { color: var(--navy); background: var(--hover); border-color: var(--border); }
.button:active:not(:disabled), .button-quiet:active:not(:disabled), .editor-entry:active { transform: translateY(1px); }
.button svg, .button-quiet svg { flex-shrink: 0; }
.icon-button { width: 44px; padding: 0; font-size: 22px; }
button, a, label.opt { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, summary:focus-visible, .opt:has(input:focus-visible) {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.container { width: min(1152px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; top: 8px; left: 12px; z-index: 100; background: var(--card); width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link:focus { width: auto; height: auto; overflow: visible; clip-path: none; padding: 10px 16px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.icon-definitions { position: absolute; width: 0; height: 0; overflow: hidden; }
.popup-surface { color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 6px; box-shadow: var(--shadow-2); }

.site-header { position: sticky; top: 0; z-index: 50; background: var(--card); border-bottom: 1px solid var(--border); }
.masthead { min-height: 80px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; gap: 13px; align-items: center; color: var(--navy-dark); margin-right: auto; }
.brand:hover { text-decoration: none; }
.brand-copy { display: grid; }
.brand-copy strong { font: 600 29px/1.15 Georgia, "Times New Roman", serif; letter-spacing: -.8px; }
.wordmark { font-variant-caps: small-caps; white-space: nowrap; }
.brand-copy .wordmark { letter-spacing: .01em; font-variant-caps: small-caps; }
.wordmark-pair { display: inline-flex; vertical-align: baseline; }
.wordmark-i, .wordmark-bang { display: inline-block; width: .34em; font-variant-caps: normal; line-height: 1; text-align: center; }
.wordmark-bang { position: relative; color: transparent; }
.wordmark-bang::before { content: "i"; position: absolute; inset: 0; color: var(--gold); transform: rotate(180deg); transform-origin: center; }
.brand-copy > span { margin-top: 6px; font-size: 11px; letter-spacing: .6px; color: var(--muted); }
.site-nav { display: flex; align-items: center; gap: 18px; align-self: stretch; }
.site-nav a { display: flex; align-items: center; position: relative; padding-inline: 6px; color: var(--secondary); font-size: 14px; white-space: nowrap; }
.site-nav a:hover { color: var(--navy); text-decoration: underline; }
.site-nav a.active { color: var(--navy); font-weight: 600; }
.site-nav a.active::after { content: ""; position: absolute; height: 3px; bottom: 0; left: 6px; right: 6px; background: var(--accent); }
.site-nav a span { margin-left: 6px; font-size: 15px; }
.nav-group { position: relative; align-self: stretch; }
.nav-group summary { display: flex; align-items: center; gap: 8px; height: 100%; min-height: 44px; padding-inline: 6px; color: var(--secondary); font-size: 14px; list-style: none; cursor: pointer; }
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group.active summary { color: var(--navy); font-weight: 600; }
.nav-group.active summary::after { content: ""; position: absolute; height: 3px; bottom: 0; left: 6px; right: 6px; background: var(--accent); }
.menu-chevron { display: inline-block; width: 5px; height: 5px; border: solid currentColor; border-width: 0 1px 1px 0; transform: translateY(-2px) rotate(45deg); }
.nav-group[open] .menu-chevron { transform: translateY(1px) rotate(225deg); }
.nav-popover { position: absolute; top: calc(100% + 6px); left: 50%; transform: translateX(-50%); z-index: 60; width: 192px; padding: 4px; }
.site-nav .nav-popover a { min-height: 44px; justify-content: space-between; padding: 8px 12px; border-radius: 4px; color: var(--ink-2); font-size: 13px; }
.site-nav .nav-popover a:hover { color: var(--accent-ink); background: var(--panel-2); text-decoration: none; }
.site-nav .nav-popover a[aria-current="page"] { color: var(--accent-ink); background: var(--accent-soft); }
.nav-disabled { display: flex; align-items: center; justify-content: space-between; width: 100%; min-height: 44px; padding: 8px 12px; color: var(--muted); background: none; border: 0; font-size: 13px; text-align: left; }
.nav-disabled span { font-size: 11px; }
.theme-toggle { display: inline-flex; align-items: center; justify-content: center; align-self: center; gap: 5px; min-height: 44px; min-width: 44px; padding: 0 4px; color: var(--secondary); background: none; border: 0; font-size: 12px; white-space: nowrap; cursor: pointer; }
.theme-toggle:hover { color: var(--navy); }
.theme-toggle svg { flex-shrink: 0; }
.theme-picker { position: relative; }
.theme-picker summary { list-style: none; }
.theme-picker summary::-webkit-details-marker { display: none; }
.theme-options { position: absolute; top: calc(100% + 6px); right: 0; z-index: 60; width: 176px; padding: 4px; }
.theme-option { display: flex; align-items: center; gap: 8px; min-height: 44px; padding: 8px 10px; border-radius: 4px; color: var(--ink-2); font-size: 13px; cursor: pointer; }
.theme-option:hover { background: var(--panel-2); }
.theme-option:has(input:checked) { color: var(--accent-ink); background: var(--accent-soft); }
.theme-option:has(input:checked)::after { content: "✓"; margin-left: auto; }
.theme-option:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: -2px; }
.theme-option input { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.theme-option svg { width: 20px; height: 20px; flex-shrink: 0; }
.header-tools { display: flex; align-items: center; gap: 12px; }
.editor-entry { padding: 8px 10px; gap: 6px; color: var(--navy-dark); background: var(--soft); }
.editor-entry:hover { border-color: var(--navy); background: var(--hover); }
.beta-badge { display: inline-block; padding: 1px 5px; border: 1px solid var(--orange); border-radius: 3px; color: var(--chip-math-fg); background: var(--orange-soft); font: 600 10px/1.7 var(--sans); white-space: nowrap; vertical-align: middle; }

.hero { color: var(--text); }
.hero-inner { min-height: 112px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.hero-copy { padding-block: 26px; min-width: 0; max-width: 100%; }
.hero-links { display: flex; align-items: center; gap: 20px; flex-shrink: 0; }
h1 { color: var(--heading); font-size: 30px; font-weight: 600; line-height: 1.4; margin: 0; }
h1 > span { display: inline-block; }
.title-latex { margin-inline: .2em; }

.download-center { display: flex; flex-direction: column; padding-block: 0 12px; flex: 1; }
.site-header, .hero { flex-shrink: 0; }
.recruit-notice { display: flex; align-items: center; gap: 9px; min-height: 44px; padding: 6px 0 6px 22px; border-left: 1px solid var(--border); color: var(--control-text); flex-shrink: 0; }
.recruit-notice:hover { text-decoration: none; }
.recruit-title { font-size: 14px; font-weight: 500; text-decoration: underline; text-decoration-color: var(--orange); text-underline-offset: 6px; }
.recruit-notice:hover .recruit-title { text-decoration-color: var(--navy); }
.recruit-notice > [aria-hidden="true"] { color: var(--muted); }
.donation-notice { padding-left: 0; border: 0; background: none; font: inherit; cursor: pointer; }
.ad-label { font-size: 10px; font-weight: 400; color: var(--gold-text); border: 1px solid currentColor; padding: 0 4px; border-radius: 2px; }
.panel { background: var(--card); border: 1px solid var(--border); border-radius: 6px; }
h2 { color: var(--navy-dark); font-family: inherit; font-size: 20px; font-weight: 600; line-height: 1.4; margin: 0; }
.version-panel { display: grid; position: relative; grid-template-columns: auto minmax(0, 1fr); width: fit-content; max-width: 100%; gap: 16px; padding-right: 184px; margin-bottom: 20px; }
.version-intro { padding-top: 11px; }
.version-intro h2 { font-family: inherit; font-size: 14px; line-height: 1.5; }
.version-content { min-width: 0; }
.opts.version-options { display: grid; grid-template-columns: repeat(2, max-content); gap: 10px; justify-content: start; }
.opts { display: flex; flex-wrap: wrap; gap: 10px; }
label.opt {
  display: flex; align-items: center; justify-content: center; position: relative;
  min-height: 46px; min-width: 88px; padding: 10px 18px;
  border: 1px solid var(--control-border); border-radius: 5px; color: var(--control-text);
  background: var(--card); cursor: pointer; user-select: none;
  transition: border-color .15s, background-color .15s, color .15s;
}
label.opt:hover { border-color: var(--hover-border); background: var(--hover); }
label.opt input { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
label.opt.checked { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
label.opt.disabled { color: var(--disabled-text); background: var(--disabled-bg); border-color: var(--line); cursor: not-allowed; }
label.opt.disabled:hover { background: var(--disabled-bg); border-color: var(--line); }
label.opt.version-card { min-width: 0; min-height: 44px; padding: 9px 13px; display: grid; grid-template-columns: 14px auto minmax(0, 1fr); align-content: center; gap: 6px 8px; background: var(--card); border-color: var(--control-border); color: var(--control-text); }
.version-card::before { content: ""; box-sizing: border-box; width: 14px; height: 14px; border: 1.5px solid var(--subtle); border-radius: 50%; grid-row: 1; }
label.opt.version-card:hover { border-color: var(--hover-border); background: var(--hover); }
label.opt.version-card.checked { border-color: var(--navy); background: var(--soft); color: var(--navy-dark); }
.version-card.checked::before { border: 4px solid var(--navy); background: var(--card); }
.version-card-title { font-weight: 600; font-size: 14px; white-space: nowrap; }
.version-card small { font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--muted); overflow-wrap: anywhere; text-align: right; }
.version-actions { display: flex; position: absolute; top: 0; right: 0; gap: 16px; z-index: 30; color: var(--muted); font-size: 12px; }
.version-info { position: static; }
.version-info summary { display: flex; align-items: center; gap: 8px; min-height: 44px; list-style: none; cursor: pointer; color: var(--navy); }
.version-info summary::-webkit-details-marker { display: none; }
.version-info summary::after { content: ""; width: 5px; height: 5px; border: solid currentColor; border-width: 0 1px 1px 0; transform: translateY(-2px) rotate(45deg); }
.version-info[open] summary::after { transform: translateY(1px) rotate(225deg); }
.version-popover { position: absolute; top: calc(100% + 6px); right: 0; z-index: 30; width: 400px; max-width: calc(100vw - 32px); padding: 16px; }
.version-info p { margin: 0; }
.version-meta { display: grid; gap: 4px; margin-bottom: 10px; color: var(--muted); font-size: 11px; }
.version-meta strong { color: var(--ink); font-size: 13px; }
.version-meta a { display: inline-flex; align-items: center; min-height: 28px; }
.version-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 8px; }
.version-links a { display: flex; align-items: center; min-height: 44px; padding: 8px; border-radius: 4px; font-size: 12px; }
.version-links a:hover { background: var(--panel-2); text-decoration: none; }
.version-links .manual-link { grid-column: 1 / -1; color: var(--accent-ink); background: var(--accent-soft); font-weight: 500; }
.manual-status { grid-column: 1 / -1; padding: 8px; color: var(--muted); font-size: 12px; }

.download-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; align-items: stretch; }
.selector-panel { padding: 18px 28px 4px; min-width: 0; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.clear-button { font-size: 12px; }
.filter-row { display: grid; grid-template-columns: 80px minmax(0, 1fr); gap: 12px; padding-block: 20px; border-top: 1px solid var(--line); align-items: center; }
.filter-row label.opt { gap: 8px; }
.filter-row label.opt::before { content: ""; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; width: 13px; height: 13px; border: 1px solid currentColor; border-radius: 3px; box-sizing: border-box; }
.filter-row label.opt.checked { border-color: var(--selection-gold); background: var(--soft); color: var(--navy-dark); }
.filter-row label.opt.checked::before { content: "✓"; border-color: var(--selection-gold); background: var(--selection-gold); color: #202020; font: 700 11px/1 sans-serif; }
.row-label { display: flex; align-items: center; gap: 8px; }
.row-label h3 { flex-shrink: 0; }
h3 { color: var(--control-text); font-size: 15px; font-weight: 600; margin: 0; line-height: 1.5; }
.filter-row.inapplicable h3 { color: var(--disabled-text); }

.preview { padding: 24px; position: sticky; top: 104px; min-width: 0; }
.preview-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.count { min-width: 28px; color: var(--gold-text); font-size: 18px; font-weight: 600; text-align: right; }
.count::after { content: " 份"; color: var(--muted); font-size: 12px; font-weight: 400; }
.preview-body { display: flex; flex-direction: column; justify-content: center; height: 104px; gap: 4px; }
.selection-summary { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2; overflow: hidden; margin: 0; font-size: 12px; color: var(--control-text); line-height: 1.65; overflow-wrap: anywhere; }
.list-trigger { align-self: flex-start; margin-left: -10px; color: var(--navy); font-size: 12px; gap: 4px; }
.empty-state { text-align: center; color: var(--subtle); }
.empty-state p { font-size: 12px; margin: 0; }
.download-list { list-style: none; margin: 0; padding: 0; }
.download-list li { padding: 12px 0; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.download-list li:last-child { border: 0; }
.dialog-count { color: var(--muted); font: 400 12px/1.5 var(--sans); white-space: nowrap; }
.template-name { display: block; font-size: 12px; font-weight: 500; color: var(--control-text); }
.template-file { display: block; font: 10px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--subtle); margin-top: 5px; }
.actions { display: grid; gap: 9px; margin-top: 8px; }
.action-summary { display: none; }
.actions button { min-height: 46px; border-radius: 5px; font-size: 13px; font-weight: 500; padding: 11px 16px; cursor: pointer; transition: background-color .15s; }
.button.primary { color: var(--on-accent); background: var(--accent); border: 1px solid var(--accent); }
.button.primary:hover:not(:disabled) { background: var(--accent-hover); }
button.primary > span:first-child { display: inline-block; margin-right: 8px; font-size: 18px; vertical-align: -1px; }
.button-count { font-size: 12px; margin-left: 4px; }
.button-count::before { content: "("; }
.button-count::after { content: ")"; }
.button.secondary { color: var(--navy); background: var(--card); border: 1px solid var(--control-border); }
.button.secondary:hover:not(:disabled) { background: var(--hover); }
button:disabled { opacity: .45; cursor: not-allowed; }


.site-dialog { width: min(520px, calc(100% - 32px)); max-height: min(80vh, 680px); max-height: min(80dvh, 680px); padding: 0; overflow: hidden; border-radius: 8px; }
.site-dialog[open] { display: flex; flex-direction: column; }
.site-dialog::backdrop { background: var(--overlay); }
.dialog-top { flex-shrink: 0; padding: 16px 20px 12px; border-bottom: 1px solid var(--border); }
.dialog-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.dialog-note, #contributors-status { color: var(--muted); font-size: 12px; }
.dialog-top .dialog-note { margin: 4px 0 0; }
.dialog-body { min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 8px 20px; }
.dialog-body:focus-visible { outline: 2px solid var(--accent); outline-offset: -3px; }
.contributors-list { list-style: none; padding: 0; margin: 0; }
.contributors-list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.contributors-list li:last-child { border-bottom: 0; }
.contributors-list a { display: flex; align-items: center; gap: 10px; min-height: 44px; min-width: 0; font-size: 13px; }
.contributors-list a span { overflow-wrap: anywhere; }
.contributor-name { min-width: 0; }
.contributor-real-name { color: var(--muted); font-size: 12px; white-space: nowrap; }
.contributor-actions { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; flex-shrink: 0; }
.coffee-button { gap: 4px; padding: 8px; border-color: var(--line-2); font-size: 11px; }
.contributors-list img { border-radius: 50%; flex-shrink: 0; }
.commit-count { flex-shrink: 0; color: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.dialog-footer { flex-shrink: 0; border-top: 1px solid var(--border); padding: 12px 20px; font-size: 12px; }
.dialog-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.editor-warning { padding: 20px; font-size: 14px; }
.editor-warning p { margin: 0 0 14px; }
.editor-warning p:last-child { margin-bottom: 0; }
.dialog-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 10px; }
html:has(.site-dialog[open]) { overflow: hidden; }
.qr-body { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 20px; }
.qr-code { display: block; flex-shrink: 0; width: min(240px, 100%); height: 240px; padding: 12px; object-fit: contain; background: #fff; border: 1px solid var(--line); border-radius: 4px; }
.qr-body .dialog-note { margin: 0; text-align: center; }
.group-number { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.group-number input { width: 120px; min-height: 36px; padding: 4px 8px; color: var(--ink); background: var(--panel-2); border: 1px solid var(--line-2); border-radius: 4px; font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; text-align: center; }
.payment-methods { display: flex; justify-content: center; gap: 8px; }
.payment-method { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 8px 14px; border: 1px solid var(--line-2); border-radius: 5px; font-size: 12px; cursor: pointer; }
.payment-method:has(input:checked) { color: var(--accent-ink); background: var(--accent-soft); border-color: var(--accent); }
.payment-method input { accent-color: var(--accent); }
.donation-code { max-width: 100%; }
.donation-preview { display: grid; place-items: center; flex-shrink: 0; width: 240px; max-width: 100%; height: 240px; }
.qr-placeholder { color: var(--muted); font-size: 12px; text-align: center; }

.home-main { flex: 1; padding-block: 36px 40px; }
.home-intro { display: flex; align-items: flex-start; justify-content: space-between; gap: 32px; }
.home-intro-copy { max-width: 650px; }
.home-intro h1 { font-size: 38px; line-height: 1.45; }
.home-intro p { max-width: 610px; margin: 18px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
.home-intro .hero-links { margin-top: 10px; }
.template-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-block: 28px 36px; }
.template-entry { display: flex; flex-direction: column; align-items: flex-start; padding: 28px; }
.template-entry h2 { font-size: 22px; }
.template-entry p { margin: 14px 0 20px; color: var(--control-text); font-size: 14px; }
.template-entry .button { margin-top: auto; }
.template-scope { display: grid; gap: 8px; margin: 0 0 24px; font-size: 13px; }
.template-scope > div { display: flex; gap: 14px; }
.template-scope dt { flex-shrink: 0; color: var(--muted); }
.template-scope dd { margin: 0; color: var(--ink-2); }
.template-entry.unavailable { background: var(--panel-2); }
.template-entry.unavailable h2, .template-entry.unavailable p { color: var(--muted); }
.quick-start h2 { margin-bottom: 12px; }
.quick-start details { border-top: 1px solid var(--line); }
.quick-start summary { display: flex; align-items: center; justify-content: space-between; min-height: 48px; padding-block: 12px; color: var(--ink-2); font-size: 14px; list-style: none; cursor: pointer; }
.quick-start summary::-webkit-details-marker { display: none; }
.quick-start summary::after { content: "+"; color: var(--muted); font-size: 18px; }
.quick-start details[open] summary::after { content: "−"; }
.quick-start p { max-width: 860px; margin: 0; padding-bottom: 16px; color: var(--muted); font-size: 13px; line-height: 1.85; }

@media (min-width: 901px) {
  .preview { display: flex; flex-direction: column; }
  .preview-body { flex-grow: 1; flex-shrink: 0; }
  .preview-heading, .preview .actions { flex-shrink: 0; }
  .selector-panel { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; padding-bottom: 8px; }
  .selector-panel .panel-heading { grid-column: 1 / -1; }
  .selector-panel .filter-row { grid-template-columns: minmax(0, 1fr); gap: 10px; padding-block: 16px; align-content: start; align-items: start; }
  .selector-panel .opts { display: grid; gap: 8px; }
  .selector-panel .opts[data-group="language"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .selector-panel .opts[data-group="type"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .selector-panel .opts[data-group="campus"], .selector-panel .opts[data-group="stage"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .selector-panel .filter-row label.opt { min-width: 0; padding: 10px 8px; gap: 6px; font-size: 14px; }
  .selector-panel .filter-row label.opt > span { white-space: nowrap; }
}
@media (min-width: 901px) and (max-width: 1199px) {
  .selector-panel { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }
}
@media (max-width: 1100px) {
  .container { width: calc(100% - 48px); }
  .download-layout { grid-template-columns: minmax(0, 1fr) 292px; gap: 20px; }
  .selector-panel { padding-inline: 23px; }
  .filter-row { grid-template-columns: 74px minmax(0, 1fr); }
  label.opt { min-width: 78px; padding-inline: 14px; }
}
@media (min-width: 901px) and (max-width: 1100px) {
  .selector-panel { column-gap: 20px; }
  .selector-panel .filter-row label.opt { padding-inline: 6px; font-size: 13px; }
  .selector-panel .opts[data-group="type"] { grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.2fr); }
  .selector-panel .opts[data-group="campus"] { grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, 1fr)); }
  .selector-panel .opts[data-group="type"] label.opt, .selector-panel .opts[data-group="campus"] label.opt { padding-inline: 4px; gap: 4px; }
}
@media (max-width: 1000px) {
  html { scroll-padding-top: 116px; }
  .masthead { min-height: 0; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0 12px; padding-block: 8px 0; }
  .brand-copy strong { font-size: 25px; }
  .brand-copy > span { display: none; }
  .site-nav { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; gap: 4px; }
  .site-nav a { min-height: 44px; font-size: 12px; }
  .nav-group summary { font-size: 12px; }
  .header-tools { grid-column: 2; grid-row: 1; gap: 8px; }
  .editor-entry { padding-inline: 8px; gap: 4px; font-size: 12px; }
  .theme-toggle { font-size: 11px; }
  .preview { top: 116px; }
}
@media (max-width: 900px) {
  .download-layout { grid-template-columns: 1fr; }
  .preview { position: static; }
  .actions { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  html { scroll-padding-top: 116px; }
  body[data-page="download"] { padding-bottom: calc(106px + env(safe-area-inset-bottom)); }
  .container { width: calc(100% - 32px); }
  .brand { gap: 10px; }
  .site-nav a { font-size: 11px; }
  .hero-inner { min-height: 0; align-items: flex-start; flex-direction: column; gap: 7px; padding-block: 22px 16px; }
  .hero-copy { padding: 0; }
  h1 { font-size: 28px; }
  .recruit-notice { padding: 5px 0; border: 0; min-height: 44px; }
  .hero-links { gap: 16px; max-width: 100%; }
  .recruit-title { font-size: 14px; }
  .panel { border-radius: 7px; }
  .version-panel { display: block; width: 100%; padding-right: 0; margin-bottom: 18px; }
  .version-intro { padding: 0; margin-bottom: 10px; }
  .opts.version-options { grid-template-columns: repeat(2, minmax(0, 1fr)); justify-content: stretch; }
  label.opt.version-card { grid-template-columns: 14px minmax(0, 1fr); min-height: 64px; padding: 9px 12px; text-align: left; }
  .version-card small { grid-column: 2; text-align: left; font-size: 11px; }
  .version-info { position: static; }
  .version-actions { display: contents; font-size: 11px; }
  .version-info summary { position: absolute; top: -11px; right: 0; }
  #stable-info summary { right: 88px; }
  .nav-group summary { font-size: 11px; }
  .selector-panel { padding: 23px 20px 3px; }
  h2 { font-size: 20px; }
  .filter-row { grid-template-columns: 1fr; gap: 13px; padding-block: 19px; }
  h3 { display: flex; align-items: baseline; gap: 8px; font-size: 14px; }
  .opts { display: grid; gap: 9px; }
  .opts[data-group="language"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .opts[data-group="campus"], .opts[data-group="stage"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .opts[data-group="type"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  label.opt { min-width: 0; min-height: 46px; padding: 11px 8px; font-size: 13px; text-align: center; }
  .preview { padding: 23px 20px 20px; }
  .count { font-size: 18px; }
  .actions { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 7px 10px; padding: 9px 16px calc(12px + env(safe-area-inset-bottom)); margin: 0; background: var(--toolbar); border-top: 1px solid var(--border); box-shadow: var(--shadow-1); }
  .action-summary { display: block; grid-column: 1 / -1; color: var(--muted); font-size: 10px; margin: 0; line-height: 1.6; }
  .actions button { min-height: 46px; padding: 10px 12px; font-size: 13px; }
  .home-main { padding-block: 24px 28px; }
  .home-intro { flex-direction: column; gap: 10px; }
  .home-intro h1 { font-size: 30px; }
  .home-intro p { margin-top: 12px; font-size: 14px; }
  .home-intro .hero-links { margin-top: 0; }
  .template-grid { grid-template-columns: 1fr; gap: 16px; margin-block: 22px 28px; }
  .template-entry { padding: 22px 20px; }
  .template-entry h2 { font-size: 20px; }
}
@media (max-width: 540px) {
  .site-nav { min-height: 44px; }
  .site-nav a { min-height: 44px; font-size: 11px; }
  h1 { font-size: 28px; }
  .opts[data-group="type"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 359px) {
  .container { width: calc(100% - 24px); }
  .selector-panel, .preview { padding-inline: 15px; }
  h1 { font-size: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}