:root{color-scheme:light;--bg:#f4f6f9;--card:#ffffff;--text:#1f2937;--muted:#6b7280;--line:#dbe3ee;--primary:#0d6efd;--success:#198754;--danger:#dc3545;--dark:#111827}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.6}input{width:100%;min-height:44px;border:1px solid var(--line);border-radius:6px;padding:10px 12px}.btn{min-height:42px;border:1px solid transparent;border-radius:6px;padding:0 16px;font-weight:700}.btnPrimary{background:var(--primary);color:#fff}.btnSuccess{background:var(--success);color:#fff}.btnDanger{background:var(--danger);color:#fff}.btnLight{border-color:var(--line);background:#fff;color:var(--text)}.alert{margin:0;border:1px solid var(--line);border-radius:6px;background:#fff;padding:10px 12px;overflow-wrap:anywhere}.alert-info{color:var(--muted)}.alert-success{border-color:#badbcc;background:#f0fff4;color:var(--success)}.alert-danger{border-color:#f5c2c7;background:#fff5f5;color:var(--danger)}.authShell{min-height:100vh;display:grid;place-items:center;padding:24px}.authCard,.onboardingCard{width:min(460px,100%);border:1px solid var(--line);border-radius:10px;background:var(--card);padding:26px;box-shadow:0 12px 32px rgba(15,23,42,.1)}.authCard h1,.onboardingCard h1{margin:0 0 12px}.onboardingCard p{color:var(--muted);line-height:1.5}.buttonRow,.choiceGrid,.tabButtons{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:10px;gap:10px}.choiceGrid{grid-template-columns:1fr}.choiceButton,.tabButtons button{min-height:46px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--text);font-weight:700}.tabButtons button.active{background:var(--dark);color:#fff}.formStack{display:grid;grid-gap:10px;gap:10px;margin-top:12px}.appShell{display:grid;grid-template-rows:64px minmax(0,1fr);width:min(1280px,calc(100% - 32px));height:calc(100vh - 32px);margin:16px auto;overflow:hidden;border:1px solid var(--line);border-radius:10px;background:var(--card);box-shadow:0 12px 32px rgba(15,23,42,.1)}.appHeader{display:flex;align-items:center;gap:18px;border-bottom:1px solid var(--line);padding:0 18px}.appHeader strong{font-size:20px}.appHeader nav{display:flex;gap:8px}.appHeader nav button{min-height:38px;border:0;border-radius:6px;background:transparent;color:var(--muted);padding:0 12px;font-weight:700}.appHeader nav button.active{background:var(--primary);color:#fff}.appHeader span{margin-left:auto;color:var(--muted)}.videoLayout{display:grid;grid-template-columns:minmax(0,1fr) 280px;min-height:0}.videoCanvas{position:relative;min-height:0;overflow:hidden;background:#111827}.videoPlaceholder{position:absolute;inset:0;background:radial-gradient(circle at 30% 30%,#26364f,transparent 35%),radial-gradient(circle at 70% 70%,#334b34,transparent 35%),linear-gradient(135deg,#111827,#1f2937)}.remoteVideo{inset:0;z-index:2;width:100%;height:100%}.localVideo,.remoteVideo{position:absolute;object-fit:cover}.localVideo{right:18px;bottom:18px;z-index:4;width:min(220px,24vw);aspect-ratio:4/3;border:3px solid #fff;border-radius:10px;background:#000}.localVideoHidden{opacity:0;pointer-events:none}.incomingBox,.videoCenter{position:absolute;left:50%;top:50%;z-index:5;transform:translate(-50%,-50%);display:grid;justify-items:center;grid-gap:12px;gap:12px;width:min(420px,92%);color:#fff;text-align:center}.startButton{min-height:54px;border:0;border-radius:8px;background:var(--primary);color:#fff;padding:0 28px;font-size:20px;font-weight:800}.incomingBox{border-radius:10px;background:rgba(17,24,39,.92);padding:24px}.spinner{width:52px;height:52px;border:5px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.callBar{position:absolute;left:50%;bottom:18px;z-index:6;transform:translateX(-50%);display:flex;gap:8px;flex-wrap:wrap;justify-content:center;border-radius:10px;background:rgba(255,255,255,.94);padding:10px}.sidePanel{display:grid;align-content:start;grid-gap:12px;gap:12px;border-left:1px solid var(--line);background:#fff;padding:16px}.infoList{display:grid;grid-gap:8px;gap:8px}.infoList span{border:1px solid var(--line);border-radius:6px;padding:9px;color:var(--muted);overflow-wrap:anywhere}.messageLayout{display:grid;grid-template-columns:340px minmax(0,1fr);min-height:0}.messageSidebar{display:grid;grid-template-rows:auto minmax(0,1fr);border-right:1px solid var(--line);min-height:0}.subTabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:8px;gap:8px;padding:12px;border-bottom:1px solid var(--line)}.subTabs button{min-height:38px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted);font-weight:700}.subTabs button.active{background:var(--primary);color:#fff}.personList{min-height:0;overflow-y:auto}.person{display:grid;grid-gap:4px;gap:4px;width:100%;border:0;border-bottom:1px solid var(--line);background:#fff;padding:14px;text-align:left}.person.active{background:#e7f1ff}.person small{color:var(--muted)}.chatPanel{display:grid;grid-template-rows:64px minmax(0,1fr) 60px;min-width:0;background:#f8fafc}.chatHeader{display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);background:#fff;padding:0 16px}.chatHeader div{display:flex;gap:8px;margin-left:auto}.chatBody{display:flex;flex-direction:column;gap:10px;min-height:0;overflow-y:auto;padding:18px}.bubble{width:-moz-fit-content;width:fit-content;max-width:min(70%,620px);border-radius:10px;background:#fff;padding:10px 12px;box-shadow:0 1px 4px rgba(15,23,42,.08)}.bubble.mine{align-self:flex-end;background:#e8f8ec}.composer{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-gap:8px;gap:8px;border-top:1px solid var(--line);background:#fff;padding:8px}.emptyState{padding:18px;color:var(--muted)}.emptyState.large{display:grid;place-items:center;font-size:22px}@media (max-width:900px){.appShell{width:100%;height:100vh;margin:0;border:0;border-radius:0}.messageLayout,.videoLayout{grid-template-columns:1fr}.messageSidebar,.sidePanel{display:none}}