:root{--app-bg:#f2f3f5;--panel:#fff;--panel-soft:#f8f9fb;--chat-bg:#b8c7d9;--bubble-me:#fee500;--bubble-other:#fff;--text:#1f2328;--text-soft:#59636e;--text-muted:#8b949e;--line:#e4e7eb;--line-strong:#d5dae1;--accent:#fee500;--accent-strong:#f4d900;--danger:#e5484d;--success:#20b26b;--shadow:0 16px 50px #141e2824;--font-main:"Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;--sidebar-width:340px;--header-height:58px}*,:before,:after{box-sizing:border-box}html,body,#root{background:var(--app-bg);height:100%;color:var(--text);font-family:var(--font-main);-webkit-font-smoothing:antialiased;margin:0;font-size:14px;overflow:hidden}body.desktop-runtime{background:#f6d900}button,input,textarea{font:inherit}button{color:inherit;cursor:pointer;background:0 0;border:0}button:disabled{cursor:not-allowed}input,textarea{color:var(--text)}a{color:inherit}::-webkit-scrollbar{width:7px;height:7px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#0000002e;border-radius:999px}::-webkit-scrollbar-thumb:hover{background:#00000047}.app-shell{background:var(--panel);width:100vw;height:100vh;display:flex;overflow:hidden}.desktop-app-frame{background:var(--panel);flex-direction:column;height:100%;display:flex;overflow:hidden}.desktop-app-content{flex:1;min-height:0;overflow:hidden}.desktop-app-content .app-shell{width:100%;height:100%}.desktop-app-content .login-page{min-height:100%}.desktop-titlebar{color:#1f2328;-webkit-user-select:none;user-select:none;-webkit-app-region:drag;background:#fee500;border-bottom:1px solid #1f23281f;flex:0 0 42px;justify-content:space-between;align-items:center;height:42px;display:flex}.desktop-drag-region{align-items:center;gap:9px;min-width:0;height:100%;padding:0 12px;display:flex}.desktop-titlebar-icon{object-fit:contain;width:25px;height:25px}.desktop-titlebar-copy{align-items:baseline;gap:8px;min-width:0;display:flex}.desktop-titlebar-copy strong{font-size:13px;font-weight:900}.desktop-titlebar-copy span{color:#1f232894;font-size:11px;font-weight:800}.desktop-window-controls{-webkit-app-region:no-drag;height:100%;display:flex}.desktop-window-controls button{color:#1f2328c2;justify-content:center;align-items:center;width:46px;height:100%;display:inline-flex}.desktop-window-controls button:hover{color:#1f2328;background:#1f232814}.desktop-window-controls .desktop-close-button:hover{color:#fff;background:#e5484d}.icon-button{width:36px;height:36px;color:var(--text-soft);border-radius:8px;justify-content:center;align-items:center;display:inline-flex}.icon-button:hover{color:var(--text);background:#0000000f}.primary-button{background:var(--accent);color:#1f2328;border-radius:8px;justify-content:center;align-items:center;gap:7px;min-height:40px;padding:0 14px;font-weight:700;display:inline-flex}.primary-button:hover{background:var(--accent-strong)}.download-button{border:1px solid var(--line-strong);min-height:40px;color:var(--text-soft);background:#fff;border-radius:8px;justify-content:center;align-items:center;gap:7px;font-weight:800;text-decoration:none;display:inline-flex}.download-button:hover{color:var(--text);background:#fffdf0;border-color:#c8b600}.login-page{background:radial-gradient(circle at 0 0,#fee50047,#0000 30%),linear-gradient(135deg,#f9fafb 0%,#edf1f5 100%);justify-content:center;align-items:center;min-height:100%;padding:24px;display:flex}.login-card{background:var(--panel);border:1px solid var(--line);width:min(380px,100%);box-shadow:var(--shadow);border-radius:8px;padding:34px 28px 28px}.login-logo{flex-direction:column;align-items:center;gap:8px;margin-bottom:28px;display:flex}.login-logo-mark{background:var(--accent);color:#111;border-radius:16px;place-items:center;width:58px;height:58px;font-size:22px;font-weight:900;display:grid}.login-logo-image{object-fit:contain;width:78px;height:78px}.login-title{font-size:24px;font-weight:800}.login-subtitle{color:var(--text-soft);font-size:13px}.form-stack{flex-direction:column;gap:14px;display:flex}.field{flex-direction:column;gap:7px;display:flex}.field label{color:var(--text-soft);font-size:12px;font-weight:700}.text-field{border:1px solid var(--line-strong);background:#fff;border-radius:8px;outline:none;width:100%;padding:11px 12px}.text-field:focus{border-color:#c8b600;box-shadow:0 0 0 3px #fee5003d}.error-box{color:var(--danger);background:#fff1f1;border-radius:8px;padding:10px 12px;font-size:13px}.sidebar{width:var(--sidebar-width);flex:0 0 var(--sidebar-width);border-right:1px solid var(--line);background:var(--panel);flex-direction:column;min-width:0;display:flex}.sidebar-header{min-height:var(--header-height);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:0 16px 0 18px;display:flex}.brand{align-items:center;gap:10px;min-width:0;display:flex}.brand-mark{background:var(--accent);border-radius:10px;place-items:center;width:34px;height:34px;font-weight:900;display:grid}.brand-name{white-space:nowrap;font-size:17px;font-weight:800}.sidebar-actions{gap:2px;display:flex}.profile-strip{border-bottom:1px solid var(--line);background:var(--panel-soft);align-items:center;gap:10px;padding:14px 18px;display:flex}.avatar{color:#fff;border-radius:16px;flex:none;place-items:center;width:42px;height:42px;font-weight:800;display:grid;overflow:hidden}.avatar img{object-fit:cover;width:100%;height:100%}.profile-info{flex:1;min-width:0}.profile-name{text-overflow:ellipsis;white-space:nowrap;font-weight:800;overflow:hidden}.profile-meta{color:var(--text-soft);text-overflow:ellipsis;white-space:nowrap;margin-top:2px;font-size:12px;overflow:hidden}.chat-sections{flex:1;min-height:0;padding:10px 10px 18px;overflow-y:auto}.section-title{color:var(--text-soft);justify-content:space-between;align-items:center;padding:10px 8px 7px;font-size:12px;font-weight:800;display:flex}.chat-row{text-align:left;border-radius:8px;align-items:center;gap:10px;width:100%;min-height:64px;padding:9px 8px;display:flex;position:relative}.chat-row:hover{background:var(--panel-soft)}.chat-row.active{background:#f7f0b7}.chat-main{flex:1;min-width:0}.chat-topline{justify-content:space-between;align-items:center;gap:8px;display:flex}.chat-name{text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:800;overflow:hidden}.chat-time{color:var(--text-muted);flex:none;font-size:11px}.chat-preview{color:var(--text-soft);text-overflow:ellipsis;white-space:nowrap;margin-top:4px;font-size:13px;overflow:hidden}.unread-badge{color:#fff;background:#ef4444;border-radius:999px;place-items:center;min-width:20px;height:20px;padding:0 6px;font-size:11px;font-weight:800;display:inline-grid}.online-dot{background:var(--success);border:2px solid #fff;border-radius:50%;width:10px;height:10px;position:absolute;bottom:11px;left:40px}.channel-view{background:var(--chat-bg);flex-direction:column;flex:1;min-width:0;display:flex}.channel-header{height:var(--header-height);background:#ffffffe6;border-bottom:1px solid #00000014;align-items:center;gap:10px;padding:0 18px;display:flex}.channel-title{flex:1;min-width:0}.channel-name{text-overflow:ellipsis;white-space:nowrap;font-weight:800;overflow:hidden}.channel-desc{color:var(--text-soft);text-overflow:ellipsis;white-space:nowrap;margin-top:2px;font-size:12px;overflow:hidden}.message-list{flex:1;min-height:0;padding:16px 18px 20px;overflow-y:auto}.empty-state{color:#1f232899;background:var(--chat-bg);flex:1;place-items:center;display:grid}.loading-more{text-align:center;color:#1f232894;padding:8px 0 14px;font-size:12px}.message-row{align-items:flex-start;gap:8px;margin-top:10px;display:flex}.message-row.me{justify-content:flex-end}.message-avatar{color:#fff;border-radius:14px;flex:none;place-items:center;width:36px;height:36px;font-weight:800;display:grid;overflow:hidden}.message-avatar img{object-fit:cover;width:100%;height:100%}.message-content{min-width:0;max-width:min(68%,680px)}.message-meta{align-items:baseline;gap:8px;margin-bottom:4px;display:flex}.sender-name{font-size:13px;font-weight:800}.bubble-line{align-items:flex-end;gap:6px;display:flex}.message-row.me .bubble-line{flex-direction:row-reverse}.bubble{word-break:break-word;white-space:pre-wrap;border-radius:8px;padding:9px 11px;line-height:1.48;box-shadow:0 1px 1px #0000000a}.message-row.me .bubble{background:var(--bubble-me);border-top-right-radius:2px}.message-row.other .bubble{background:var(--bubble-other);border-top-left-radius:2px}.message-side{color:#1f23289e;white-space:nowrap;flex-direction:column;align-items:flex-end;gap:3px;font-size:11px;display:flex}.message-row.me .message-side{align-items:flex-start}.read-count{color:#5d5300;font-weight:800}.system-message{justify-content:center;margin:14px 0;display:flex}.system-message span{color:#1f23289e;background:#ffffff6b;border-radius:999px;padding:5px 12px;font-size:12px}.typing-row{color:#1f2328a8;background:#ffffff8a;border-radius:999px;align-items:center;gap:8px;margin-top:12px;padding:7px 10px;font-size:12px;display:inline-flex}.typing-dots{gap:3px;display:flex}.typing-dots span{background:#1f232873;border-radius:50%;width:5px;height:5px;animation:1.1s ease-in-out infinite typing-pulse}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}@keyframes typing-pulse{0%,80%,to{opacity:.35;transform:translateY(0)}40%{opacity:1;transform:translateY(-2px)}}.send-error{color:var(--danger);background:#fff1f1;border-radius:8px;margin:0 16px 8px;padding:8px 10px;font-size:12px}.composer{background:var(--panel);border-top:1px solid #00000014;flex:none;padding:10px 14px 12px}.pending-row{flex-wrap:wrap;gap:8px;margin-bottom:8px;display:flex}.pending-chip{border:1px solid var(--line);background:var(--panel-soft);border-radius:8px;align-items:center;gap:7px;max-width:220px;padding:5px 8px;display:inline-flex}.pending-chip img{object-fit:cover;border-radius:6px;width:32px;height:32px}.pending-name{text-overflow:ellipsis;white-space:nowrap;min-width:0;font-size:12px;overflow:hidden}.composer-row{align-items:flex-end;gap:8px;display:flex}.message-textarea{resize:none;border:1px solid var(--line-strong);border-radius:8px;outline:none;flex:1;min-height:42px;max-height:150px;padding:10px 12px;line-height:1.45}.message-textarea:focus{border-color:#c8b600}.send-button{background:var(--accent);color:#111;border-radius:8px;justify-content:center;align-items:center;width:42px;height:42px;display:inline-flex}.send-button:disabled{opacity:.42}.spin{animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.file-chip{white-space:normal;max-width:320px;color:inherit;text-align:left;background:#ffffffb8;border-radius:8px;align-items:center;gap:8px;padding:8px 10px;text-decoration:none;display:inline-flex}.file-chip:hover{background:#ffffffe6}.file-info{flex-direction:column;flex:1;min-width:0;display:flex}.file-name{text-overflow:ellipsis;white-space:nowrap;font-size:13px;display:block;overflow:hidden}.file-size{color:var(--text-soft);font-size:11px;display:block}.image-preview{flex-direction:column;gap:5px;text-decoration:none;display:inline-flex}.image-preview-button{text-align:left;background:0 0;border-radius:8px;padding:0;display:block;overflow:hidden}.image-preview img{object-fit:contain;border-radius:8px;max-width:min(320px,58vw);max-height:240px;display:block}.file-actions-row{align-items:center;gap:8px;max-width:min(320px,58vw);display:flex}.file-open-button{color:#1f2328c2;background:#ffffffd1;border-radius:7px;flex:none;justify-content:center;align-items:center;gap:4px;min-height:28px;padding:0 8px;font-size:12px;font-weight:800;display:inline-flex}.file-open-button:hover{color:var(--text);background:#fff}.image-preview .file-name{color:#1f232894;font-size:11px}.modal-backdrop{z-index:100;background:#00000061;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal-panel{background:var(--panel);width:min(430px,100%);max-height:86vh;box-shadow:var(--shadow);border-radius:8px;flex-direction:column;display:flex;overflow:hidden}.modal-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;min-height:54px;padding:0 16px 0 18px;font-weight:800;display:flex}.modal-body{padding:16px;overflow-y:auto}.user-picker{flex-direction:column;gap:4px;display:flex}.picker-row{text-align:left;border-radius:8px;align-items:center;gap:10px;min-height:54px;padding:8px;display:flex}.picker-row:hover{background:var(--panel-soft)}.admin-panel{width:min(920px,96vw)}@media (width<=767px){:root{--sidebar-width:100vw;--header-height:54px}.app-shell.mobile-chat-open .sidebar,.app-shell:not(.mobile-chat-open) .channel-view{display:none}.sidebar{border-right:0}.message-list{padding:12px 10px 16px}.message-content{max-width:78%}.message-avatar{border-radius:12px;width:32px;height:32px}.channel-header{padding:0 8px}.composer{padding:8px}.message-textarea{font-size:16px}.login-page{padding:16px}.login-card{padding:30px 22px 24px}}