.tutor-ws{height:calc(100dvh - var(--header-h));flex:1;grid-template-rows:minmax(0,1fr);grid-template-columns:260px minmax(0,1fr) 380px;min-width:0;min-height:0;display:grid}.tutor-threads{border-right:1px solid var(--line);background:var(--bg-raised);flex-direction:column;gap:6px;min-width:0;padding:20px 14px;display:flex;overflow-y:auto}.thread{border:1px solid #0000;border-radius:12px;min-width:0;padding:10px 12px;display:block}.thread.on{background:var(--surface);border-color:var(--line)}.tutor-chat{flex-direction:column;min-width:0;min-height:0;padding:28px 0 16px;display:flex}.tutor-col{flex-direction:column;flex:1;gap:16px;width:100%;max-width:780px;min-height:0;margin:0 auto;padding:0 32px;display:flex}.tutor-head{flex:none}.tutor-course-label{align-items:center;gap:0;min-width:0;margin-top:2px;display:flex}.tutor-course-label select{color:var(--ink-muted);cursor:pointer;background:0 0;border:0;border-radius:4px;flex:none;max-width:50%;padding:0}.tutor-new{display:none}.tutor-messages{flex-direction:column;flex:1;gap:16px;min-height:0;padding:4px 2px 8px;display:flex;overflow-y:auto}.tutor-empty{text-align:center;flex-direction:column;align-items:center;gap:10px;max-width:460px;margin:auto;padding:24px 0;display:flex}.msg-me{flex-direction:column;align-items:flex-end;gap:8px;display:flex}.msg-photo{object-fit:cover;border:1px solid var(--line);border-radius:12px;width:120px;height:90px}.msg-kapi{flex-direction:column;gap:12px;min-width:0;display:flex}.tutor-side{border-left:1px solid var(--line);background:var(--bg-raised);flex-direction:column;gap:14px;min-width:0;padding:28px 22px 20px;display:flex;overflow-y:auto}.composer-wrap{flex-direction:column;flex:none;gap:8px;display:flex}.composer{flex-direction:column;align-items:stretch;gap:8px;padding:12px 12px 8px 14px}.composer-top{align-items:flex-start;gap:6px;display:flex}.composer textarea{font:400 16px/24px var(--font-sans);flex:1;min-height:24px;max-height:120px;overflow-y:hidden}.composer-expand{width:28px;height:28px;color:var(--ink-faint);margin:-2px -4px 0 0}.composer-bar{align-items:center;gap:4px;min-width:0;display:flex}.composer-hint{min-width:0;margin-left:6px}.attach-chip{display:inline-block;position:relative}.attach-chip img{object-fit:cover;border:1px solid var(--line);border-radius:10px;width:56px;height:56px;display:block}.attach-chip button{border:1px solid var(--line);background:var(--surface-raised);width:22px;height:22px;color:var(--ink);border-radius:50%;place-items:center;padding:0;display:grid;position:absolute;top:-6px;right:-6px}.dg-card{min-width:0;padding:16px 20px 18px;container-type:inline-size}.dg{margin-top:6px}.dg-row{align-items:center;row-gap:6px;display:grid}.dg-node{border:1px solid var(--line);background:var(--surface-raised);text-align:center;border-radius:10px;align-content:center;justify-items:center;gap:2px;min-width:0;min-height:62px;padding:6px 4px;display:grid}.dg-node .t-meta{overflow-wrap:anywhere}.dg-node.on{border-color:var(--accent);background:var(--accent-soft)}.dg-node.on .t-label,.dg-node.on .t-meta{color:var(--accent-ink)}.dg-arrow{flex:none;margin:0 2px}.dg-bracket{text-align:center;grid-row:2;gap:2px;display:grid}.dg-bracket .t-meta{color:var(--accent-ink)}.dg-brace{border:1.2px dashed var(--accent);border-top:0;border-radius:0 0 8px 8px;height:10px}.dg-stack{flex-direction:column;gap:6px;display:none}.dg-large .dg-node{min-height:110px}.dg-large .dg-node .t-label{font-size:20px;line-height:26px}.dg-large .dg-node .t-meta{font-size:13px;line-height:18px}@container (max-width:480px){.dg-row{display:none}.dg-stack{display:flex}}.editor{z-index:80;background:var(--bg);position:fixed;inset:0;overflow-y:auto}.editor-inner{flex-direction:column;gap:12px;max-width:820px;min-height:100%;margin:0 auto;padding:24px 20px 20px;display:flex}.editor-card{flex-direction:column;flex:1;gap:10px;min-height:320px;padding:18px 18px 14px;display:flex}.editor-surface{font:400 17px/26px var(--font-sans);color:var(--ink);overflow-wrap:anywhere;outline:none;flex:1;min-height:200px}.editor-surface:empty:before{content:attr(data-placeholder);color:var(--ink-faint)}.editor-surface>p:only-child:has(>br:only-child):before{content:attr(data-placeholder);color:var(--ink-faint)}.editor-surface h2{font:600 20px/26px var(--font-sans);letter-spacing:-.02em}.editor-surface blockquote{border-left:3px solid var(--primary-soft);font:400 15px/22px var(--font-sans);color:var(--ink-muted)}.editor-card:focus-within{border-color:var(--ink-faint)}.editor-tools{align-items:center;gap:2px;padding:6px;display:flex;overflow-x:auto}@media (max-width:1280px){.tutor-ws{grid-template-columns:240px minmax(0,1fr)}.tutor-side{display:none}}@media (max-width:960px){.tutor-ws{grid-template-columns:minmax(0,1fr)}.tutor-threads{display:none}.tutor-new{display:inline-flex}}@media (max-width:760px){.tutor-ws{height:calc(100dvh - var(--header-h) - var(--tabbar-h) - env(safe-area-inset-bottom))}.tutor-chat{padding:14px 0 10px}.tutor-col{gap:12px;padding:0 16px}.composer-hint,.composer-keys,.composer-fmt,.tutor-course-label>.trunc{display:none}.tutor-course-label select{max-width:100%}}