:root{color-scheme:light;--tg-blue:#3390ec;--tg-blue-dark:#2481cc;--ink:#111827;--muted:#708499;--chat:#d7e3ea;--incoming:#fff;--outgoing:#e4f2ff;--danger:#d34a4a;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",sans-serif;font-size:16px}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#e9eef2;color:var(--ink)}body{min-height:100dvh}button,textarea{font:inherit}.hidden{display:none!important}.shell{min-height:100dvh;display:grid;grid-template-rows:auto 1fr auto;max-width:760px;margin:0 auto;background:var(--chat);box-shadow:0 0 48px #25384b24}.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:11px;min-height:64px;padding:max(8px,env(safe-area-inset-top)) 12px 8px;background:#ffffffed;border-bottom:1px solid #cbd5df;backdrop-filter:blur(20px)}.group-avatar{display:grid;place-items:center;flex:0 0 42px;width:42px;height:42px;border-radius:50%;background:linear-gradient(145deg,#64b5f6,#2788db);color:#fff;font-size:1.18rem;font-weight:700}.group-info{min-width:0;flex:1}.group-info h1{margin:0;font-size:1.05rem;line-height:1.22;font-weight:700}.connection{display:block;margin-top:1px;color:var(--muted);font-size:.76rem;line-height:1.2}.connection.online{color:var(--tg-blue)}.icon-button{border:0;background:transparent;color:var(--tg-blue);font-size:.86rem;font-weight:600;padding:10px 5px}.eyebrow{margin:0;color:var(--tg-blue);font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}main{min-height:0;background-color:var(--chat);background-image:radial-gradient(circle at 18px 18px,#ffffff26 2px,transparent 2.5px),radial-gradient(circle at 48px 52px,#8299a715 3px,transparent 3.5px);background-size:72px 72px}.welcome{min-height:65dvh;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:34px;max-width:520px;margin:auto;background:#ffffffed}.welcome-mark{display:grid;place-items:center;width:66px;height:66px;margin-bottom:25px;border-radius:50%;background:linear-gradient(145deg,#64b5f6,#2788db);color:white;font-size:2rem;font-weight:700;box-shadow:0 12px 30px #2788db38}.welcome h2{margin:8px 0 13px;font-size:2rem;line-height:1.08}.welcome>p:not(.eyebrow):not(.error){color:var(--muted);line-height:1.5}.primary{min-height:50px;margin-top:17px;padding:0 22px;border:0;border-radius:12px;background:var(--tg-blue);color:#fff;font-weight:700}.primary:active,.send:active{background:var(--tg-blue-dark)}.primary:disabled,.send:disabled{opacity:.5}.chat{min-height:calc(100dvh - 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36px);border-radius:18px;overflow:hidden}.composer{bottom:18px;border-radius:0 0 18px 18px}}