:root{color-scheme:dark;--bg: #0f1729;--fg: #e8ecf4;--accent: #5b8def}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Malgun Gothic,sans-serif}.shell{max-width:360px;margin:80px auto;padding:24px;text-align:center}.auth-form{display:flex;flex-direction:column;gap:12px;margin:24px 0}input{padding:10px 12px;border-radius:8px;border:1px solid #2a3350;background:#16203a;color:var(--fg)}button{padding:10px 12px;border-radius:8px;border:none;background:var(--accent);color:#fff;font-weight:600;cursor:pointer}button.link{background:transparent;color:#8fb4f7;font-weight:400;font-size:13px}.chat-shell{display:flex;height:100vh}.sidebar{width:240px;background:#131c33;padding:16px 12px;overflow-y:auto;display:flex;flex-direction:column;gap:4px}.sidebar .me{font-weight:700;margin-bottom:16px}.section-title{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:#6b7591;margin:14px 0 6px}.channel-list{list-style:none;margin:0;padding:0}.channel-list li{padding:6px 8px;border-radius:6px;cursor:pointer;font-size:14px}.channel-list li:hover{background:#1c2740}.channel-list li.active{background:var(--accent);color:#fff}.new-group{display:flex;flex-direction:column;gap:6px;margin:6px 0;padding:8px;background:#16203a;border-radius:8px}.member-picker{display:flex;flex-direction:column;gap:2px;max-height:120px;overflow-y:auto;font-size:13px}.message-pane{flex:1;display:flex;flex-direction:column}.message-pane header{padding:14px 20px;border-bottom:1px solid #1c2740;font-weight:600}.messages{flex:1;overflow-y:auto;padding:16px 20px;display:flex;flex-direction:column;gap:8px}.message .author{font-weight:600;margin-right:8px;color:#8fb4f7}.composer{display:flex;gap:8px;padding:12px 20px;border-top:1px solid #1c2740}.composer input{flex:1}.empty-state{margin:auto;color:#6b7591}