body{font-family:Arial,sans-serif;background:#f4f4f9;margin:0;height:100vh;display:flex;justify-content:center;align-items:center}.app-layout{position:relative;display:flex;justify-content:center;width:100%;height:100%}.chat-container{width:500px;max-width:calc(100vw - 32px);height:90vh;background:#fff;border-radius:12px;display:flex;flex-direction:column;overflow:hidden;z-index:1}.top-bar{display:flex;align-items:center;border-bottom:1px solid #eee;background:#fff;flex-shrink:0}.mode-bar{display:flex;gap:6px;padding:10px 12px;overflow-x:auto;flex:1;min-width:0}.mode-btn{display:flex;align-items:center;gap:4px;margin:0;padding:6px 12px;font-size:13px;font-weight:500;border:1px solid #ddd;border-radius:20px;background:#f5f5f5;color:#555;cursor:pointer;white-space:nowrap;transition:all .15s ease}.mode-btn:hover{background:#e8f0fe;border-color:#b0c9f5;color:#333}.mode-btn.active{background:#007bff;border-color:#007bff;color:#fff}.mode-icon{font-size:14px}.settings-toggle{flex-shrink:0;margin:0 8px 0 0;padding:6px 10px;font-size:18px;background:transparent;border:none;color:#666;cursor:pointer;border-radius:8px;transition:background .15s}.settings-toggle:hover{background:#f0f0f0;color:#333}.messages{flex:1;min-height:0;padding:16px;overflow-y:auto;background:#fafafa}.message{max-width:75%;margin-bottom:8px;padding:10px 14px;border-radius:18px;font-size:15px;line-height:1.4;overflow-wrap:anywhere;word-break:break-word}.user{margin-left:auto;background:#4e9cff;color:#fff;border-bottom-right-radius:4px}.bot{margin-right:auto;background:#e5e5ea;color:#000;border-bottom-left-radius:4px}.input-bar{display:flex;padding:10px;border-top:1px solid #ddd}.input-bar input{flex:1;padding:10px;font-size:15px;border-radius:8px;border:1px solid #ccc}.input-bar button{margin-left:8px;padding:10px 16px;font-size:15px;border:none;border-radius:8px;background:#007bff;color:#fff;cursor:pointer;transition:opacity .15s}.input-bar input:disabled{background:#f0f0f0;color:#999;cursor:not-allowed}.input-bar button:disabled{opacity:.5;cursor:not-allowed}.settings-panel{position:fixed;top:50%;right:-300px;transform:translateY(-50%);width:280px;max-height:90vh;background:#fff;border-radius:12px 0 0 12px;box-shadow:-4px 0 24px #0000001f;z-index:10;overflow-y:auto;transition:right .25s ease;display:flex;flex-direction:column}.settings-panel.open{right:0}.panel-overlay{position:fixed;inset:0;background:#00000026;z-index:9}.panel-header{display:flex;align-items:center;justify-content:space-between;padding:16px 18px 12px;border-bottom:1px solid #eee}.panel-header h3{margin:0;font-size:16px;font-weight:600}.panel-close{background:none;border:none;font-size:22px;color:#888;cursor:pointer;padding:0 4px;line-height:1}.panel-close:hover{color:#333}.panel-section{padding:16px 18px;border-bottom:1px solid #f0f0f0}.panel-section:last-child{border-bottom:none}.panel-label{display:block;font-size:13px;font-weight:600;color:#555;text-transform:uppercase;letter-spacing:.4px;margin-bottom:10px}.model-option{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 12px;margin-bottom:6px;border:1px solid #e0e0e0;border-radius:8px;background:#fafafa;cursor:pointer;transition:all .15s ease;text-align:left;font-size:14px;color:#333}.model-option:hover{background:#e8f0fe;border-color:#b0c9f5}.model-option.active{background:#e8f0fe;border-color:#007bff}.model-name{font-weight:600}.model-desc{font-size:11px;color:#888}.model-option.active .model-desc{color:#5a8fd4}.token-slider{width:100%;margin:4px 0 6px;accent-color:#007bff}.token-range-labels{display:flex;justify-content:space-between;font-size:11px;color:#999}