/* "AiEng" assistant (js/schoolqa.js) */
.qa-card { max-width: 760px; }
.qa-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.qa-mascot { width: 44px; height: 44px; object-fit: contain; flex: none; filter: drop-shadow(0 2px 4px rgba(0,0,0,.15)); }
.qa-ava { width: 26px; height: 26px; object-fit: contain; flex: none; margin-top: 1px; }
.qa-langtog { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; flex: none; }
.qa-lang { border: 0; background: var(--panel); color: var(--ink-soft); font: inherit; font-weight: 800; font-size: 12px; padding: 5px 11px; cursor: pointer; }
.qa-lang.on { background: var(--brand); color: #fff; }
.qa-cost { margin-top: 8px; font-size: 11px; color: var(--accent); font-weight: 700; }
.qa-link { display: inline-block; background: var(--brand); color: #fff !important; font-weight: 700; font-size: 12.5px; padding: 2px 9px; border-radius: 14px; text-decoration: none; margin: 1px 2px; white-space: nowrap; }
.qa-link:hover { background: var(--brand-2); }
.qa-badge, .qa-ai { background: linear-gradient(135deg, #6a5cff, #b44cff); color: #fff; font-size: 10px; font-weight: 800; letter-spacing: .05em; padding: 2px 7px; border-radius: 6px; }
.qa-head b { font-size: 15px; }
.qa-live { font-size: 10.5px; color: var(--good); font-weight: 700; }
.qa-hint { margin-bottom: 6px; }
.qa-samples { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 12px; }
.qa-chip { border: 1px solid var(--line); background: var(--panel-2); color: var(--ink); border-radius: 20px; padding: 6px 12px; font: inherit; font-size: 12.5px; cursor: pointer; }
.qa-chip:hover { border-color: var(--brand); background: color-mix(in srgb, var(--brand) 8%, var(--panel-2)); }
.qa-log { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; max-height: 52vh; overflow-y: auto; }
.qa-log:empty { display: none; }
.qa-q { display: flex; justify-content: flex-end; }
.qa-bubble-q { background: var(--brand); color: #fff; padding: 8px 12px; border-radius: 14px 14px 3px 14px; font-size: 13.5px; max-width: 80%; }
.qa-a { display: flex; align-items: flex-start; gap: 8px; }
.qa-a .qa-ai { flex: none; margin-top: 2px; }
.qa-bubble-a { background: var(--panel-2); border: 1px solid var(--line); padding: 10px 13px; border-radius: 3px 14px 14px 14px; font-size: 13.5px; line-height: 1.55; max-width: 85%; }
.qa-bubble-a b { color: var(--ink); }
.qa-dim { color: var(--ink-soft); font-size: 12px; }
.qa-ask { display: flex; gap: 8px; }
.qa-input { flex: 1; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--panel); font-size: 13.5px; }
.qa-input:focus { border-color: var(--brand); outline: none; }
.qa-foot { margin-top: 10px; }