:root{--bg-primary:#1a1b23;--bg-secondary:#22232d;--bg-tertiary:#2a2b37;--bg-input:#2e303a;--text-primary:#e4e4e7;--text-secondary:#9ca3af;--text-muted:#9099a4;--accent:#c084fc;--accent-hover:#a855f7;--accent-bg:#c084fc26;--accent-border:#c084fc66;--border:#2e303a;--border-light:#3a3b47;--error:#f87171;--error-bg:#3a1c1c;--error-border:#7f2b2b;--error-text:#f5a5a5;--success:#4ade80;--warning:#fbbf24;--shadow:0 4px 12px #0000004d;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;font-family:var(--sans);color:var(--text-primary);background-color:var(--bg-primary);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px;line-height:1.5}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);min-height:100vh;color:var(--text-primary)}#root{flex-direction:column;min-height:100vh;display:flex}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}button{cursor:pointer;font-family:inherit}code{font-family:var(--mono);background:var(--bg-tertiary);border-radius:var(--radius-sm);padding:2px 6px;font-size:.9em}.login-container{justify-content:center;align-items:center;width:100%;max-width:400px;display:flex}.login-form{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;box-shadow:var(--shadow);flex-direction:column;gap:12px;padding:32px;display:flex}.login-title{color:var(--text-primary);text-align:center;margin-bottom:8px;font-size:24px;font-weight:600}.login-error{border-radius:var(--radius-md);color:var(--error);background:#f871711f;border:1px solid #f871714d;padding:10px 14px;font-size:14px}.login-label{color:var(--text-secondary);font-size:14px;font-weight:500}.login-input{background:var(--bg-input);border:1px solid var(--border-light);border-radius:var(--radius-md);color:var(--text-primary);outline:none;padding:10px 14px;font-family:inherit;font-size:15px;transition:border-color .15s}.login-input:focus{border-color:var(--accent-border)}.login-input:disabled{opacity:.6}.login-input::placeholder{color:var(--text-muted)}.login-button{background:var(--accent);color:var(--bg-primary);border-radius:var(--radius-md);border:none;margin-top:8px;padding:10px 20px;font-size:15px;font-weight:500;transition:background .15s}.login-button:hover:not(:disabled){background:var(--accent-hover)}.login-button:disabled{opacity:.6;cursor:not-allowed}.model-selector{align-items:center;gap:10px;display:flex}.model-selector__label{color:var(--text-secondary);white-space:nowrap;font-size:14px;font-weight:500}.model-selector__select{background:var(--bg-input);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;appearance:auto;padding:6px 12px;font-family:inherit;font-size:14px;transition:border-color .15s}.model-selector__select:hover{border-color:var(--border-light)}.model-selector__select:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-bg);outline:none}.model-selector__loading{color:var(--text-muted);font-size:13px}.model-selector__error{color:var(--error);font-size:13px}.model-selector__retry{color:var(--accent);border:1px solid var(--accent-border);border-radius:var(--radius-sm);background:0 0;padding:4px 10px;font-size:13px;transition:background .15s}.model-selector__retry:hover{background:var(--accent-bg)}.chat-interface{flex-direction:column;width:100%;max-width:900px;height:100%;margin:0 auto;display:flex;position:relative}.chat-interface--dragging{pointer-events:none}.chat-messages{flex-direction:column;flex:1;gap:16px;padding:20px;display:flex;overflow-y:auto}.chat-message{border-radius:var(--radius-lg);word-wrap:break-word;white-space:pre-wrap;flex-direction:column;max-width:90%;padding:12px 16px;font-size:15px;line-height:1.6;display:flex}.chat-message--user{background:var(--accent-bg);border:1px solid var(--accent-border);color:var(--text-primary);align-self:flex-end}.chat-message--assistant{background:var(--bg-tertiary);border:1px solid var(--border-light);color:var(--text-primary);align-self:flex-start}.chat-message__role{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:4px;font-size:11px;font-weight:600}.chat-message--user .chat-message__role{color:var(--accent)}.chat-message__attachment{color:var(--text-muted);margin-bottom:4px;font-size:12px}.chat-loading{background:var(--bg-tertiary);border:1px solid var(--border-light);border-radius:var(--radius-lg);align-self:flex-start;align-items:center;gap:6px;max-width:90%;padding:12px 16px;display:flex}.chat-loading__dot{background:var(--text-muted);border-radius:50%;width:8px;height:8px;animation:1.4s ease-in-out infinite chat-dot-pulse}.chat-loading__dot:nth-child(2){animation-delay:.2s}.chat-loading__dot:nth-child(3){animation-delay:.4s}@keyframes chat-dot-pulse{0%,80%,to{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}.chat-input-area{background:var(--bg-secondary);border-top:1px solid var(--border);flex-direction:column;gap:8px;padding:12px 20px 24px;display:flex}.chat-input-area .model-selector{width:100%}.chat-input-row{align-items:flex-end;gap:8px;display:flex}.chat-input-row textarea{resize:none;font-family:var(--sans);color:var(--text-primary);background:var(--bg-input);border:1px solid var(--border-light);border-radius:var(--radius-md);outline:none;flex:1;min-height:44px;max-height:160px;padding:10px 14px;font-size:15px;line-height:1.5}.chat-input-row textarea::placeholder{color:var(--text-muted)}.chat-input-row textarea:focus{border-color:var(--accent-border)}.chat-attach-btn{background:var(--bg-input);border:1px solid var(--border-light);border-radius:var(--radius-md);cursor:pointer;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:18px;transition:border-color .15s;display:flex}.chat-attach-btn:hover:not(:disabled){border-color:var(--accent-border)}.chat-attach-btn:disabled{opacity:.5;cursor:not-allowed}.chat-send-btn{height:44px;color:var(--bg-primary);background:var(--accent);border-radius:var(--radius-md);border:none;flex-shrink:0;align-self:flex-end;padding:10px 20px;font-size:14px;font-weight:600;transition:background .15s}.chat-send-btn:hover:not(:disabled){background:var(--accent-hover)}.chat-send-btn:disabled{opacity:.5;cursor:not-allowed}.chat-attachment{background:var(--bg-tertiary);border:1px solid var(--border-light);border-radius:var(--radius-md);color:var(--text-secondary);align-items:center;gap:6px;padding:6px 10px;font-size:13px;display:flex}.chat-attachment__icon{font-size:14px}.chat-attachment__name{text-overflow:ellipsis;white-space:nowrap;flex:1;max-width:300px;overflow:hidden}.chat-attachment__remove{color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm,4px);opacity:.7;background:0 0;border:none;padding:2px 4px;font-size:13px}.chat-attachment__remove:hover{opacity:1}.chat-drop-overlay{z-index:10;border-radius:var(--radius-lg);pointer-events:all;background:#00000080;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.chat-drop-overlay__label{background:var(--bg-secondary);border:2px dashed var(--accent);border-radius:var(--radius-lg);color:var(--accent);padding:20px 32px;font-size:16px;font-weight:600}.chat-empty{color:var(--text-muted);flex:1;justify-content:center;align-items:center;font-size:15px;display:flex}.chat-error{background:var(--error-bg,#3a1c1c);border:1px solid var(--error-border,#7f2b2b);border-radius:var(--radius-lg);color:var(--error-text,#f5a5a5);align-self:stretch;align-items:center;gap:8px;padding:10px 14px;font-size:14px;display:flex}.chat-error__message{flex:1}.chat-error__dismiss{color:var(--error-text,#f5a5a5);cursor:pointer;border-radius:var(--radius-sm,4px);opacity:.7;background:0 0;border:none;padding:2px 6px;font-size:14px}.chat-error__dismiss:hover{opacity:1}.chat-stop-btn{height:44px;color:var(--error-text,#f5a5a5);background:var(--error-bg,#3a1c1c);border:1px solid var(--error-border,#7f2b2b);border-radius:var(--radius-md);cursor:pointer;flex-shrink:0;align-self:flex-end;padding:10px 20px;font-size:14px;font-weight:600;transition:background .15s}.chat-stop-btn:hover{background:var(--error-border,#7f2b2b)}.session-list{flex-direction:column;gap:12px;width:100%;max-width:600px;margin:0 auto;padding:24px 16px;display:flex}.session-list__header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.session-list__title{color:var(--text-primary);font-size:20px;font-weight:600}.session-list__new-btn{background:var(--accent);color:var(--bg-primary);border-radius:var(--radius-md);border:none;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:background .15s;display:inline-flex}.session-list__new-btn:hover{background:var(--accent-hover)}.session-list__empty{text-align:center;color:var(--text-secondary);padding:48px 16px;font-size:15px}.session-list__item{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;align-items:center;gap:12px;padding:14px 16px;transition:background .15s,border-color .15s;display:flex}.session-list__item:hover{background:var(--bg-tertiary);border-color:var(--border-light)}.session-list__item-info{flex:1;min-width:0}.session-list__item-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:500;overflow:hidden}.session-list__item-date{color:var(--text-muted);margin-top:2px;font-size:13px}.session-list__item-actions{flex-shrink:0;gap:6px;display:flex}.session-list__rename-input{width:100%;color:var(--text-primary);background:var(--bg-input,var(--bg-primary));border:1px solid var(--accent-border);border-radius:var(--radius-sm);outline:none;padding:4px 8px;font-family:inherit;font-size:15px}.session-list__rename-btn{color:var(--text-muted);border:1px solid var(--border);border-radius:var(--radius-sm);background:0 0;flex-shrink:0;padding:6px 10px;font-size:13px;transition:color .15s,border-color .15s}.session-list__rename-btn:hover{color:var(--accent);border-color:var(--accent)}.session-list__delete-btn{color:var(--text-muted);border:1px solid var(--border);border-radius:var(--radius-sm);background:0 0;flex-shrink:0;padding:6px 10px;font-size:13px;transition:color .15s,border-color .15s,background .15s}.session-list__delete-btn:hover{color:var(--error);border-color:var(--error);background:#f871711a}.settings-panel{flex-direction:column;gap:16px;width:100%;max-width:600px;margin:0 auto;padding:24px 16px;display:flex}.settings-panel__title{color:var(--text-primary);margin-bottom:4px;font-size:20px;font-weight:600}.settings-panel__loading{text-align:center;color:var(--text-secondary);padding:48px 16px;font-size:15px}.settings-panel__field{flex-direction:column;gap:6px;display:flex}.settings-panel__label{color:var(--text-secondary);font-size:14px;font-weight:500}.settings-panel__textarea{background:var(--bg-input);width:100%;min-height:160px;color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-md);resize:vertical;padding:12px;font-family:inherit;font-size:14px;line-height:1.5;transition:border-color .15s}.settings-panel__textarea:hover{border-color:var(--border-light)}.settings-panel__textarea:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-bg);outline:none}.settings-panel__actions{gap:10px;display:flex}.settings-panel__save-btn{background:var(--accent);color:var(--bg-primary);border-radius:var(--radius-md);border:none;padding:8px 20px;font-size:14px;font-weight:500;transition:background .15s}.settings-panel__save-btn:hover{background:var(--accent-hover)}.settings-panel__save-btn:disabled{opacity:.5;cursor:not-allowed}.settings-panel__clear-btn{color:var(--text-secondary);border:1px solid var(--border);border-radius:var(--radius-md);background:0 0;padding:8px 16px;font-size:14px;transition:color .15s,border-color .15s}.settings-panel__clear-btn:hover{color:var(--text-primary);border-color:var(--border-light)}.settings-panel__feedback{border-radius:var(--radius-md);padding:8px 12px;font-size:13px}.settings-panel__feedback--success{color:var(--success);background:#4ade801a}.settings-panel__feedback--error{color:var(--error);background:#f871711a}.cost-dashboard{flex-direction:column;gap:20px;width:100%;max-width:600px;margin:0 auto;padding:24px 16px;display:flex}.cost-dashboard__title{color:var(--text-primary);margin-bottom:4px;font-size:20px;font-weight:600}.cost-dashboard__loading{text-align:center;color:var(--text-secondary);padding:48px 16px;font-size:15px}.cost-dashboard__error{text-align:center;color:var(--error);padding:48px 16px;font-size:15px}.cost-dashboard__section{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md);flex-direction:column;gap:10px;padding:16px;display:flex}.cost-dashboard__section-title{color:var(--text-secondary);font-size:16px;font-weight:500}.cost-dashboard__total{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:10px 0;display:flex}.cost-dashboard__total-label{color:var(--text-primary);font-size:15px;font-weight:500}.cost-dashboard__total-amount{color:var(--accent);font-size:18px;font-weight:600}.cost-dashboard__model-list{flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.cost-dashboard__model-item{justify-content:space-between;align-items:center;padding:6px 0;display:flex}.cost-dashboard__model-name{color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap;margin-right:12px;font-size:14px;overflow:hidden}.cost-dashboard__model-amount{color:var(--text-primary);flex-shrink:0;font-size:14px;font-weight:500}.app{flex-direction:column;height:100vh;display:flex;overflow:hidden}.app-header{background:var(--bg-secondary);border-bottom:1px solid var(--border);z-index:100;justify-content:space-between;align-items:center;padding:12px 20px;transition:transform .25s;display:flex;position:sticky;top:0}.app-header--hidden{transform:translateY(-100%)}.app-header h1{color:var(--text-primary);font-size:20px;font-weight:600}.app-header h1 a{color:inherit;text-decoration:none}.app-header h1 span{color:var(--accent)}.app-nav{gap:16px;display:flex}.app-nav a{color:var(--text-secondary);font-size:14px}.app-nav a:hover{color:var(--accent)}.app-nav__logout{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;padding:0;font-family:inherit;font-size:14px}.app-nav__logout:hover{color:var(--accent)}.app-main{flex:1;display:flex;overflow:auto}.app-landing{flex-direction:column;flex:1;align-items:center;padding-top:32px;display:flex;overflow-y:auto}.app-landing>.app-welcome{padding:0 20px 16px}.app-main>.app-welcome{margin:auto;padding:40px 20px}.app-welcome{text-align:center;max-width:480px}.app-welcome h2{color:var(--text-primary);margin-bottom:12px;font-size:28px;font-weight:600}.app-welcome p{color:var(--text-secondary);font-size:16px}