:root{color-scheme:dark;--bg:#111111;--panel:#1a1a1a;--panel-soft:#242424;--border:rgba(255,255,255,0.12);--text:#f5f5f5;--muted:#9ca3af;--accent:#23d69b;--danger:#fb7185}*{box-sizing:border-box}body,html{height:100%;margin:0;background:var(--bg);color:var(--text);font-family:Inter,Arial,sans-serif;overflow:hidden}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled,textarea:disabled{cursor:not-allowed;opacity:.56}.chatVideoShell{grid-template-columns:minmax(340px,430px) minmax(0,1fr);background:var(--bg)}.chatPanel,.chatVideoShell{height:100vh;min-height:0;display:grid;overflow:hidden}.chatPanel{grid-template-rows:auto minmax(0,1fr) auto;border-right:1px solid var(--border);background:#191919}.chatHeader,.videoHeader{min-height:64px}.chatHeader{border-bottom:1px solid var(--border)}.messageList{min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:24px 18px 18px;display:flex;flex-direction:column;gap:16px}.messageRow{display:flex;width:100%}.messageRow.user{justify-content:flex-end}.messageRow.assistant{justify-content:flex-start}.messageBubble{max-width:min(92%,620px);padding:13px 15px;border-radius:18px;background:#252525;color:var(--text);border:1px solid rgba(255,255,255,.08);font-size:15px;line-height:1.42;white-space:pre-wrap}.messageRow.user .messageBubble{background:#eeeeee;color:#111111;border-color:transparent}.messageBubble.working{color:#d1d5db}.messageBubble.success{border-color:rgba(35,214,155,.34);background:rgba(6,78,59,.18)}.messageBubble.error{color:#fecdd3;border-color:rgba(251,113,133,.42);background:rgba(127,29,29,.28)}.messageMeta{margin-bottom:6px;color:var(--muted);font-size:12px;font-weight:800;letter-spacing:0}.composer{margin:16px;padding:10px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;align-items:end;border:1px solid var(--border);border-radius:22px;background:#242424;box-shadow:0 24px 70px rgba(0,0,0,.32)}.fileInput{display:none}.attachButton{width:46px;height:46px;border:0;border-radius:999px;background:transparent;color:#ffffff;display:grid;place-items:center;padding:0}.attachButton:hover:not(:disabled){background:rgba(255,255,255,.08)}.attachIcon{width:27px;height:27px;fill:none;stroke:currentColor;stroke-width:2.1;stroke-linecap:round}.composer textarea{width:100%;min-height:46px;max-height:160px;padding:12px 8px 10px 12px;resize:none;border:0;outline:none;color:var(--text);background:transparent;line-height:1.35}.composer textarea::placeholder{color:#9ca3af}.sendButton{width:46px;height:46px;border:0;border-radius:999px;background:#000000;color:#ffffff;display:grid;place-items:center;padding:0}.sendIcon{width:25px;height:25px;fill:none;stroke:#ffffff;stroke-width:2.9;stroke-linecap:round;stroke-linejoin:round}.attachedAssets{grid-column:1/-1;display:flex;gap:8px;overflow-x:auto;padding:2px 2px 0}.assetChip{width:48px;height:48px;flex:0 0 auto;border-radius:12px;overflow:hidden;background:#111111;border:1px solid rgba(255,255,255,.14)}.assetChip img,.assetChip video{width:100%;height:100%;object-fit:cover;display:block}.videoPanel{min-width:0;height:100vh;grid-template-rows:auto minmax(0,1fr);background:#101116;overflow:hidden}.videoPanel,.videoStage{min-height:0;display:grid}.videoStage{place-items:center;padding:0 28px 28px;background:radial-gradient(circle at 50% 105%,rgba(35,214,155,.12),transparent 36%),#12131a}.previewFrame{width:min(100%,1180px);border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#000000;box-shadow:0 38px 110px rgba(0,0,0,.42)}.previewEmpty{width:min(100%,1180px);aspect-ratio:16/9;display:grid;place-items:center;border:1px dashed var(--border);border-radius:10px;color:var(--muted);background:#f3eeee;text-align:center;padding:24px}@media (max-width:980px){.chatVideoShell{height:100vh;grid-template-columns:1fr}.chatPanel,.videoPanel{min-height:0}.chatPanel{height:52vh;border-right:0;border-bottom:1px solid var(--border)}.videoPanel{height:48vh}.videoStage{padding:18px}}