:root{--bg:#08101f;--panel:#101a30;--soft:#17233d;--border:rgba(255,255,255,.09);--text:#f7f8fc;--muted:#93a4bd;--primary:#6c78ff;--green:#2bd5a1;--danger:#ff7383}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{font-family:Arial,Helvetica,sans-serif;background:radial-gradient(circle at top left,rgba(108,120,255,.18),transparent 35%),var(--bg);color:var(--text)}button,input,textarea{font:inherit}.hidden{display:none!important}.auth-screen{min-height:100vh;display:grid;place-items:center;padding:20px}.auth-card{width:min(440px,100%);padding:30px;border:1px solid var(--border);border-radius:25px;background:rgba(16,26,48,.97);box-shadow:0 25px 70px rgba(0,0,0,.4)}.logo{width:58px;height:58px;display:grid;place-items:center;border-radius:18px;background:linear-gradient(135deg,var(--primary),#9768f8);font-size:27px;font-weight:900;box-shadow:0 12px 30px rgba(108,120,255,.3)}h1{margin:18px 0 8px}.lead{color:var(--muted);line-height:1.55}.tabs{display:grid;grid-template-columns:1fr 1fr;gap:5px;margin:25px 0 17px;padding:5px;border-radius:14px;background:#0a1326}.tab{border:0;border-radius:10px;padding:11px;background:transparent;color:#9fb0cb;font-weight:800;cursor:pointer}.tab.active{background:#22304f;color:#fff}label{display:block;margin:14px 0 7px;font-size:13px;font-weight:800}input,textarea{width:100%;border:1px solid var(--border);border-radius:13px;outline:none;background:#0b1529;color:#fff;padding:13px 14px}input:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(108,120,255,.14)}small{color:var(--muted)}.username-input{display:flex;align-items:center;border:1px solid var(--border);border-radius:13px;background:#0b1529}.username-input span{padding-left:14px;color:var(--muted);font-weight:900}.username-input input{border:0;padding-left:6px;box-shadow:none}.primary{width:100%;margin-top:20px;border:0;border-radius:13px;padding:14px;background:linear-gradient(135deg,var(--primary),#9668f8);color:#fff;font-weight:900;cursor:pointer}.primary:disabled{opacity:.55}.connection-status{margin-top:18px;border-top:1px solid var(--border);padding-top:15px;color:var(--muted);font-size:12px}.connection-status.ok{color:#aaffdf}.connection-status.bad{color:#ffc3c9}.app-screen{height:100vh;display:grid;grid-template-columns:280px minmax(0,1fr) 250px;overflow:hidden}.sidebar,.members{background:rgba(11,19,36,.98)}.sidebar{display:flex;flex-direction:column;border-right:1px solid var(--border)}.brand{height:76px;display:flex;align-items:center;gap:12px;padding:15px;border-bottom:1px solid var(--border)}.brand small,.user-card span,.room small,.member 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18px;border:0;background:transparent;color:#ffb4bc;text-align:left;font-weight:800;cursor:pointer}.chat{min-width:0;display:grid;grid-template-rows:76px minmax(0,1fr) auto;background:radial-gradient(circle at center,rgba(108,120,255,.05),transparent 48%),#091223}.chat-header{display:flex;align-items:center;gap:12px;padding:0 21px;border-bottom:1px solid var(--border)}.chat-header h2{margin:0 0 3px;font-size:18px}.chat-header p{margin:0;color:var(--muted);font-size:12px}.badge{margin-left:auto;border:1px solid rgba(43,213,161,.25);border-radius:999px;padding:8px 11px;color:#baffea;background:rgba(43,213,161,.09);font-size:11px;font-weight:900}.menu-open{display:none;border:0;background:transparent;color:#fff;font-size:22px}.messages{overflow-y:auto;padding:20px 22px}.empty{padding:25px;color:var(--muted);text-align:center}.error-text{color:#ffc4ca}.message{max-width:780px;display:flex;align-items:flex-start;gap:10px;margin-bottom:18px}.message.mine{margin-left:auto;flex-direction:row-reverse}.message-avatar{width:38px;height:38px;flex:0 0 auto}.meta{display:flex;align-items:center;gap:7px;margin-bottom:6px;font-size:12px}.meta span,.meta time{color:var(--muted)}.mine .meta{justify-content:flex-end}.bubble{display:inline-block;max-width:min(650px,74vw);padding:11px 13px;border:1px solid var(--border);border-radius:5px 16px 16px;background:var(--soft);line-height:1.5;overflow-wrap:anywhere}.mine .bubble{border-radius:16px 5px 16px 16px;background:linear-gradient(135deg,var(--primary),#895ee5)}.composer{display:flex;align-items:flex-end;gap:10px;padding:14px 18px 18px;border-top:1px solid var(--border)}.composer textarea{min-height:48px;max-height:130px;resize:none}.composer button{width:48px;height:48px;flex:0 0 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minmax(0,1fr)}.members{display:none}}@media(max-width:760px){.app-screen{grid-template-columns:1fr}.sidebar{position:fixed;z-index:20;inset:0 auto 0 0;width:min(86vw,300px);transform:translateX(-105%);transition:.22s;box-shadow:20px 0 60px rgba(0,0,0,.45)}.sidebar.open{transform:translateX(0)}.menu-close,.menu-open{display:block}.overlay{position:fixed;z-index:19;inset:0;background:rgba(0,0,0,.58)}.overlay.show{display:block}.badge{display:none}.messages{padding:16px 12px}.composer{padding:10px}.bubble{max-width:76vw}}@media(max-width:480px){.auth-screen{padding:11px}.auth-card{padding:23px 18px;border-radius:19px}.meta span{display:none}}