*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f0f2f5;--surface:#fff;--border:#e4e6eb;--text:#1c1e21;--text-secondary:#65676b;--primary:#6c5ce7;--primary-hover:#5a4bd1;--primary-light:#ede7f6;--danger:#e53e3e;--radius:8px;--sidebar-width:360px}body{background:var(--bg);color:var(--text);height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.4;overflow:hidden}#root{height:100vh;display:flex}.login-page{background:var(--bg);justify-content:center;align-items:center;width:100%;height:100vh;display:flex}.login-form{background:var(--surface);border-radius:12px;flex-direction:column;gap:16px;width:360px;padding:40px;display:flex;box-shadow:0 2px 12px #00000014}.login-form h1{text-align:center;color:var(--primary);margin-bottom:0;font-size:28px}.login-form h2{text-align:center;color:var(--text-secondary);font-size:18px;font-weight:400}.login-form input{border:1px solid var(--border);border-radius:var(--radius);outline:none;padding:12px 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var(--border);background:var(--surface);flex-direction:column;height:100dvh;display:flex}.main-content{background:#e8ecf1;flex-direction:column;flex:1;height:100dvh;min-height:0;max-height:100vh;display:flex}.no-chat-selected{color:var(--text-secondary);flex:1;justify-content:center;align-items:center;font-size:16px;display:flex}.chat-list{flex-direction:column;height:100%;display:flex}.chat-list-header{border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:16px;display:flex}.chat-list-header h2{flex:1;font-size:24px;font-weight:700}.chat-items{flex:1;overflow-y:auto}.chat-item{cursor:pointer;border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:12px 16px;transition:background 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6px;font-size:11px;font-weight:600;display:flex}.backdrop{z-index:90;position:fixed;inset:0}.sidebar-menu{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);z-index:100;min-width:200px;position:absolute;top:56px;left:8px;overflow:hidden;box-shadow:0 4px 16px #0000001f}.sidebar-menu-title{border-bottom:1px solid var(--border);padding:16px;font-size:18px;font-weight:600}.sidebar-menu button{text-align:left;cursor:pointer;background:0 0;border:none;width:100%;padding:12px 16px;font-size:15px;transition:background .15s;display:block}.sidebar-menu button:hover{background:#f5f5f5}.chat-view{flex-direction:column;height:100%;min-height:0;display:flex}.chat-view-header{background:var(--surface);border-bottom:1px solid var(--border);align-items:center;gap:8px;padding:12px 20px;display:flex}.chat-view-header-info{flex:1;min-width:0}.chat-view-header-info 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#0000000f}.message-text{white-space:pre-wrap;font-size:14px;line-height:1.4}.message-time{opacity:.6;text-align:right;justify-content:flex-end;align-items:center;gap:3px;margin-top:4px;font-size:11px;display:flex}.read-check{opacity:.7;font-size:12px}.read-check.read{opacity:1;color:#4fc3f7}.attachment-link{color:inherit;opacity:.85;margin-top:4px;font-size:13px;text-decoration:none;display:block}.attachment-link:hover{text-decoration:underline}.own-bubble .attachment-link{color:#fff}.attachment-image-wrap{margin-top:4px}.attachment-image{cursor:pointer;object-fit:cover;border-radius:8px;max-width:240px;max-height:240px;transition:opacity .15s;display:block}.attachment-image:hover{opacity:.85}.image-modal-overlay{z-index:300;cursor:pointer;background:#000000d9;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.image-modal-content{cursor:default}.image-modal-img{object-fit:contain;cursor:default;border-radius:4px;max-width:90vw;max-height:90vh;box-shadow:0 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32px);margin:16px}}.admin-page{--admin-bg:#f5f7fa;--admin-surface:#fff;--admin-border:#e2e8f0;--admin-text:#1a202c;--admin-text-secondary:#718096;--admin-primary:#3182ce;--admin-primary-hover:#2c5282;--admin-danger:#e53e3e;--admin-danger-hover:#c53030;--admin-success:#38a169;--admin-warning:#d69e2e;--admin-gray:#a0aec0;--admin-radius:8px}.admin-login-page{background:#f5f7fa;justify-content:center;align-items:center;min-height:100vh;display:flex}.admin-login-form{background:#fff;border-radius:8px;flex-direction:column;gap:16px;width:100%;max-width:400px;padding:40px;display:flex;box-shadow:0 4px 24px #00000014}.admin-login-form h1{text-align:center;margin-bottom:8px;font-size:24px}.admin-login-form input{border:1px solid #e2e8f0;border-radius:8px;outline:none;padding:10px 14px;font-size:15px;transition:border-color .2s}.admin-login-form input:focus{border-color:#3182ce}.admin-login-form button{color:#fff;cursor:pointer;background:#3182ce;border:none;border-radius:8px;padding:10px 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button:hover:not(:disabled){color:#3182ce;border-color:#3182ce}.admin-pagination button:disabled{opacity:.4;cursor:not-allowed}.admin-pagination span{color:#718096;font-size:14px}.admin-loading,.admin-empty{text-align:center;color:#718096;padding:60px 20px;font-size:16px}.admin-edit-page{max-width:600px;margin:0 auto;padding:24px}.admin-btn-back{cursor:pointer;background:#fff;border:1px solid #e2e8f0;border-radius:8px;margin-bottom:24px;padding:8px 16px;font-size:14px;transition:all .2s}.admin-btn-back:hover{color:#3182ce;border-color:#3182ce}.admin-edit-page h1{margin-bottom:16px;font-size:24px}.admin-user-meta{background:#fff;border:1px solid #e2e8f0;border-radius:8px;margin-bottom:24px;padding:16px;font-size:14px}.admin-user-meta p{margin-bottom:4px}.admin-user-meta p:last-child{margin-bottom:0}.admin-edit-page form{background:#fff;border-radius:8px;flex-direction:column;gap:16px;padding:24px;display:flex;box-shadow:0 1px 8px #0000000a}.admin-edit-page 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button[type=submit]:hover{background:#2c5282}.admin-form-actions button[type=submit]:disabled{opacity:.6;cursor:not-allowed}.admin-btn-cancel{color:#718096;background:#fff;border:1px solid #e2e8f0}.admin-btn-cancel:hover{border-color:#718096}.admin-header-actions{align-items:center;gap:8px;display:flex}.admin-btn-create{color:#fff;cursor:pointer;background:#38a169;border:none;border-radius:8px;padding:8px 16px;font-size:14px;font-weight:500;transition:background .2s}.admin-btn-create:hover{background:#2f855a}.admin-reset-password-section{background:#fff;border-radius:8px;margin-top:32px;padding:24px;box-shadow:0 1px 8px #0000000a}.admin-reset-password-section h2{margin-bottom:16px;font-size:18px}.admin-reset-password-section form{flex-direction:column;gap:16px;display:flex}.admin-btn-reset-password{color:#fff!important;background:#d69e2e!important;border:none!important}.admin-btn-reset-password:hover{background:#b7791f!important}.admin-success{color:#38a169;background:#f0fff4;border:1px solid #c6f6d5;border-radius:8px;margin-bottom:8px;padding:10px 14px;font-size:14px}@media (width<=768px){.admin-users-page{padding:16px}.admin-page-header{flex-direction:column;align-items:flex-start;gap:12px}.admin-search-bar{flex-direction:column}.admin-search-bar button{width:100%}.admin-table{font-size:13px}.admin-table th,.admin-table td{padding:8px 10px}.admin-edit-page{padding:16px}.admin-login-form{margin:16px}.admin-pagination{gap:8px}.admin-pagination button{padding:6px 12px;font-size:13px}.admin-header-actions{justify-content:flex-end;width:100%}}