/* Reading navigation has its own layouts; the forum shell stays fluid. */
#detail-view { --reading-top-actions-height:44px;container:reading / inline-size; }
#topic-detail { display:grid;grid-template-columns:minmax(0,1fr);gap:24px;min-width:0;position:relative; }
.topic-reading-main { grid-row:2;min-width:0; }
.detail-top-actions { position:sticky;top:var(--header);z-index:13;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:var(--reading-top-actions-height);margin-bottom:0;background:#fff; }
.detail-top-actions .back-button { display:inline-flex;align-items:center;min-height:44px;margin-bottom:0; }
.reading-topic-header { --reading-progress:0;grid-row:1;grid-column:1 / -1;position:sticky;top:calc(var(--header) + var(--reading-top-actions-height));z-index:12;align-self:start;min-width:0;height:var(--reading-expanded-height,auto);pointer-events:none; }
.reading-header-surface { padding:12px 0 calc(14px - var(--reading-progress) * 6px);background:#fff;border-bottom:1px solid #ededed;pointer-events:auto; }
.reading-topic-header[data-ready] .reading-header-surface { position:absolute;inset:0 0 auto; }
.reading-topic-header.is-stuck .reading-header-surface { box-shadow:0 6px 10px -9px #0003; }
.reading-heading-group { min-width:0; }
.reading-topic-header .detail-heading { display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;overflow-wrap:anywhere;font-size:calc(26px - var(--reading-progress) * 8px);line-height:1.5;letter-spacing:-.025em;font-weight:650;margin:0; }
.reading-topic-header[data-compact] .detail-heading { -webkit-line-clamp:2; }
.reading-topic-header .detail-summary { gap:8px 12px;align-items:center;flex-wrap:wrap;max-height:calc(80px * (1 - var(--reading-progress)));opacity:calc(1 - var(--reading-progress) * 1.6);overflow:hidden;margin:calc(10px * (1 - var(--reading-progress))) 0 0; }
.reading-topic-header[data-compact] .detail-summary { visibility:hidden; }
.reading-count-button { display:inline-flex;align-items:center;gap:6px;min-height:30px;padding:3px 9px;border:1px solid #e7e7e7;border-radius:6px;color:#666;background:#f7f7f7;font-size:12px;line-height:1.5; }
.reading-count-button svg { width:13px;height:13px; }
.reading-count-button:hover { border-color:#ccc;background:#eee; }
.reading-nav { display:flex;align-items:center;flex-wrap:wrap;gap:6px;min-width:0;margin-top:12px;padding-top:10px;border-top:1px solid #eee; }
.reading-nav-title { display:none; }
.reading-nav-footer { display:contents; }
.reading-action { display:inline-flex;align-items:center;justify-content:flex-start;gap:9px;min-height:40px;min-width:0;border:1px solid transparent;border-radius:8px;padding:9px 11px;background:transparent;font-size:13px;font-weight:450;line-height:1.5;color:#696969;text-align:left; }
.reading-action-icon { display:inline-flex;align-items:center;flex:none;color:#939393; }
.reading-action-icon svg { width:16px;height:16px;stroke-width:1.6; }
.reading-action-label { min-width:0;overflow-wrap:anywhere; }
.reading-count { display:inline-flex;align-items:center;justify-content:center;min-width:22px;padding:0 6px;margin-left:2px;border-radius:5px;background:#eaeaea;color:#7c7c7c;font-size:11px;line-height:21px;font-weight:550;font-variant-numeric:tabular-nums; }
.reading-action:not(:disabled):hover { background:#eee;color:#333; }
.reading-action:not(:disabled):hover .reading-action-icon { color:#666; }
.reading-action[aria-current=location] { background:#ececec;color:#444;font-weight:600; }
.reading-action[aria-current=location] .reading-action-icon { color:#777; }
.reading-primary { background:#333;border-color:#333;color:#fff;font-weight:550; }
.reading-primary .reading-action-icon { color:#ddd; }
.reading-action.reading-primary:hover { background:#484848;border-color:#484848;color:#fff; }
.reading-action.reading-primary:hover .reading-action-icon { color:#fff; }
.reading-return { border-color:#ddd;background:#fff; }
.reading-return:disabled { color:#aaa;border-color:#e8e8e8;background:#f7f7f7;cursor:default; }
.reading-return:disabled .reading-action-icon { color:#b8b8b8; }
.reading-return.is-ready { color:#444;background:#f0f0f0;border-color:#ccc;font-weight:550; }
.reading-return.is-ready .reading-action-icon { color:#777; }
.reading-action:focus-visible,.reading-count-button:focus-visible { outline:2px solid #888;outline-offset:3px; }
.reading-mobile { display:none; }
@media(min-width:1440px){
 @container reading (min-width:940px){
  #topic-detail { grid-template-columns:minmax(0,1fr) 188px;gap:36px; }
  .topic-reading-main { grid-row:2;grid-column:1; }
  .reading-header-surface { padding-right:224px; }
  .reading-nav { position:absolute;top:calc(100% + 24px);right:0;width:188px;display:flex;flex-direction:column;align-items:stretch;gap:4px;margin:0;padding:12px;border:1px solid #e6e6e6;border-radius:14px;background:#fafafa;box-shadow:0 3px 16px #00000004; }
  .reading-nav-title { display:block;font-size:11px;font-weight:550;line-height:1.5;letter-spacing:.03em;color:#999;padding:2px 11px 11px; }
  .reading-nav .reading-action { width:100%;min-height:43px; }
  .reading-nav .reading-count { margin-left:auto; }
  .reading-nav-footer { display:flex;flex-direction:column;gap:8px;border-top:1px solid #e6e6e6;margin-top:8px;padding-top:12px; }
  .reading-nav-footer .reading-action { justify-content:center;font-size:12px;padding-inline:8px; }
 }
}
.replies-heading { display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;border-top:1px solid #e9e9e9;margin-top:36px;padding-top:28px;padding-bottom:14px; }
.replies-heading h2 { font-size:18px;line-height:1.5;font-weight:650;letter-spacing:-.01em; }
.replies-heading .reading-action { font-size:12px;min-height:36px;border:1px solid #e5e5e5;background:#fafafa;color:#777;padding:6px 10px; }
.replies-heading .reading-action-icon svg { width:14px;height:14px; }
.no-replies { padding:30px 20px;border:1px dashed #e2e2e2;border-radius:10px;background:#fbfbfb;text-align:center;color:#909090;font-size:14px; }
.no-replies p { margin-bottom:12px; }
.no-replies .reading-action { justify-content:center;border:1px solid #e1e1e1;color:#666;background:#fff;font-size:13px; }
.reply-window-note { font-size:12px;line-height:1.7;color:#909090;margin:0 0 12px; }
.reply-posts .post { padding-block:24px; }
#topic-reply-editor { margin-top:28px;padding:20px;border:1px solid #e6e6e6;border-radius:12px;background:#fafafa; }
#topic-reply-editor>label { font-size:14px;font-weight:600;color:#666; }
#topic-reply-editor textarea { margin-top:12px;border-color:#e2e2e2;background:#fff;border-radius:8px;line-height:1.8; }
#topic-reply-editor textarea:focus { border-color:#aaa;outline-color:#aaa; }
#topic-reply-editor .editor-actions { margin-top:12px; }
body.topic-reading #assistant-launcher { display:none; }
#topic-search-toggle { min-width:40px;min-height:40px;color:#939393;border:1px solid transparent;border-radius:8px; }
#topic-search-toggle:hover { border-color:#e6e6e6;background:#f8f8f8; }
#topic-original,#topic-replies,#topic-reply-editor { scroll-margin-top:calc(var(--header) + var(--reading-top-actions-height) + var(--reading-live-height,90px) + 12px); }
@media(max-width:760px){
 #topic-detail { gap:16px; }
 .reading-nav { display:none; }
 .reading-header-surface { padding:10px 0 calc(12px - var(--reading-progress) * 4px); }
 .reading-topic-header .detail-heading { font-size:calc(22px - var(--reading-progress) * 6px);line-height:1.5;letter-spacing:-.02em;-webkit-line-clamp:4; }
 .reading-topic-header[data-compact] .detail-heading { -webkit-line-clamp:2; }
 .reading-topic-header .detail-summary { gap:8px 10px; }
 .reading-count-button { min-height:32px; }
 .reading-mobile { position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom,0px));z-index:20;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:8px;padding:7px;border:1px solid #e4e4e4;border-radius:16px;background:#fffffff5;box-shadow:0 4px 22px #00000018,0 1px 3px #00000006; }
 .reading-mobile .reading-action { justify-content:center;min-height:46px;padding:10px 7px;border-radius:10px;font-size:14px;line-height:1.35;gap:7px; }
 .reading-mobile [data-reading-mobile-left] { color:#626262;background:#f0f0f0; }
 .reading-mobile .reading-count { font-size:11px;line-height:20px;min-width:20px;padding-inline:5px;margin:0;background:#e5e5e5;color:#7f7f7f; }
 .reading-mobile .reading-primary { background:#333; }
 .reading-mobile .is-return { border-color:#d1d1d1;background:#ececec; }
 .reading-mobile .reading-action-icon svg { width:17px;height:17px; }
 body.topic-reading { padding-bottom:calc(96px + env(safe-area-inset-bottom,0px)); }
 body.topic-reading .panel-footer { padding-bottom:24px; }
 body.topic-reading .toast { bottom:calc(96px + env(safe-area-inset-bottom,0px)); }
 body.topic-reading .assistant-panel { bottom:calc(94px + env(safe-area-inset-bottom,0px));max-height:calc(100dvh - var(--header) - 130px); }
 body.reading-keyboard-open .reading-mobile { visibility:hidden;pointer-events:none; }
 .replies-heading { margin-top:28px;padding-top:24px;gap:10px; }
 .replies-heading h2 { font-size:17px; }
 #topic-reply-editor { padding:16px;margin-top:24px;border-radius:10px; }
 #topic-reply-editor textarea { font-size:16px; }
}
body.composer-open .reading-nav,body.composer-open .reading-mobile,
body.drawer-open .reading-nav,body.drawer-open .reading-mobile,
body:has(#site-dialog[open]) .reading-nav,body:has(#site-dialog[open]) .reading-mobile { visibility:hidden;pointer-events:none; }
@media(prefers-reduced-motion:no-preference){.reading-action { transition:background-color .15s,border-color .15s,color .15s; }}