*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #4f46e5;--primary-dark: #3730a3;--bg: #f9fafb;--surface: #ffffff;--border: #e5e7eb;--text: #111827;--text-muted: #6b7280;--sidebar-bg: #1e1b4b;--sidebar-text: #c7d2fe;--sidebar-active: #4f46e5;--danger: #ef4444;--safe-bottom: env(safe-area-inset-bottom, 0px)}html,body,#root{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button{cursor:pointer;border:none;background:none;font-family:inherit}input,textarea{font-family:inherit}a{text-decoration:none;color:inherit}img{max-width:100%}.app{display:flex;height:100dvh;overflow:hidden}.sidebar{width:260px;background:var(--sidebar-bg);display:flex;flex-direction:column;flex-shrink:0;overflow:hidden;transition:transform .25s ease}.sidebar-header{padding:16px;border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:10px}.sidebar-header h1{color:#fff;font-size:18px;font-weight:700}.sidebar-scroll{flex:1;overflow-y:auto;padding:8px 0}.sidebar-section{padding:12px 16px 4px;color:var(--sidebar-text);font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;display:flex;align-items:center;justify-content:space-between}.sidebar-section button{color:var(--sidebar-text);font-size:18px;opacity:.7}.sidebar-item{padding:7px 16px;color:var(--sidebar-text);font-size:14px;cursor:pointer;border-radius:4px;margin:1px 8px;display:flex;align-items:center;gap:8px}.sidebar-item:hover{background:#ffffff12}.sidebar-item.active{background:var(--sidebar-active);color:#fff}.sidebar-item .avatar-sm{width:24px;height:24px;border-radius:50%;object-fit:cover;background:var(--primary);display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff;flex-shrink:0}.sidebar-footer{padding:12px 16px;border-top:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:10px}.sidebar-footer .user-info{flex:1;min-width:0}.sidebar-footer .user-name{color:#fff;font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-footer .user-email{color:var(--sidebar-text);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-footer button{color:var(--sidebar-text);font-size:18px}.avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;flex-shrink:0}.avatar-placeholder{width:32px;height:32px;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:600;flex-shrink:0}.main{flex:1;display:flex;flex-direction:column;min-width:0}.main-header{padding:0 16px;height:52px;border-bottom:1px solid var(--border);background:var(--surface);display:flex;align-items:center;gap:10px;flex-shrink:0}.main-header .menu-btn{font-size:22px;display:none;color:var(--text-muted)}.main-header h2{font-size:16px;font-weight:600}.main-header .hash{color:var(--text-muted);margin-right:2px}.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:2px}.msg-group{display:flex;gap:10px;margin-top:12px}.msg-group:first-child{margin-top:0}.msg-body{flex:1;min-width:0}.msg-meta{display:flex;align-items:baseline;gap:8px;margin-bottom:2px}.msg-name{font-size:14px;font-weight:600}.msg-time{font-size:11px;color:var(--text-muted)}.msg-content{font-size:14px;line-height:1.5;word-break:break-word}.msg-file{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;font-size:13px;color:var(--primary);margin-top:4px}.input-area{padding:12px 16px;padding-bottom:calc(12px + var(--safe-bottom));border-top:1px solid var(--border);background:var(--surface);display:flex;gap:8px;align-items:flex-end}.input-area textarea{flex:1;border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px;resize:none;max-height:120px;outline:none;line-height:1.4}.input-area textarea:focus{border-color:var(--primary)}.input-area .send-btn{width:40px;height:40px;background:var(--primary);border-radius:8px;color:#fff;font-size:18px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.input-area .send-btn:disabled{opacity:.4}.input-area .file-btn{color:var(--text-muted);font-size:22px;padding:4px}.login-page{display:flex;align-items:center;justify-content:center;height:100dvh;background:var(--sidebar-bg)}.login-card{background:var(--surface);border-radius:16px;padding:40px 32px;text-align:center;width:320px;box-shadow:0 20px 60px #0000004d}.login-card h1{font-size:28px;font-weight:800;color:var(--primary);margin-bottom:8px}.login-card p{color:var(--text-muted);margin-bottom:32px;font-size:14px}.google-btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:12px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;font-weight:500;background:var(--surface);transition:background .15s}.google-btn:hover{background:var(--bg)}.google-btn:disabled{opacity:.5}.google-icon{width:20px;height:20px}.name-input{width:100%;padding:12px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;outline:none;margin-bottom:12px;text-align:center}.name-input:focus{border-color:var(--primary)}.error{color:var(--danger);font-size:13px;margin-bottom:10px}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100;padding:16px}.modal{background:var(--surface);border-radius:12px;padding:24px;width:100%;max-width:360px}.modal h3{font-size:16px;font-weight:600;margin-bottom:16px}.modal input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;outline:none;margin-bottom:12px}.modal input:focus{border-color:var(--primary)}.modal-actions{display:flex;gap:8px;justify-content:flex-end}.btn-primary{padding:8px 16px;background:var(--primary);color:#fff;border-radius:8px;font-size:14px;font-weight:500}.btn-ghost{padding:8px 16px;color:var(--text-muted);font-size:14px}@media (max-width: 640px){.sidebar{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;width:280px;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-header .menu-btn{display:flex}.overlay-close{position:fixed;top:0;right:0;bottom:0;left:0;z-index:49;background:#0006}}