@import url("https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap");:root{--accent:#4a90d9;--accent-light:#6daee8;--accent-dim:rgba(74,144,217,.12);--accent-border:rgba(74,144,217,.3);--bg:#fff;--bg-2:#f7f8fa;--bg-3:#eff1f5;--sidebar-bg:#f2f4f7;--text-1:#0d0f14;--text-2:#4a4f5c;--text-3:#8a8f9e;--border:rgba(0,0,0,.08);--border-2:rgba(0,0,0,.14);--shadow-sm:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);--shadow-md:0 4px 16px rgba(0,0,0,.08),0 1px 4px rgba(0,0,0,.04);--shadow-lg:0 12px 40px rgba(0,0,0,.1),0 4px 12px rgba(0,0,0,.06);--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--sidebar-w:260px;--topbar-h:56px;--font:"Sora",sans-serif;--mono:"JetBrains Mono",monospace;--transition:0.18s ease}[data-theme=dark]{--bg:#0e1117;--bg-2:#151922;--bg-3:#1d2330;--sidebar-bg:#131720;--text-1:#edf0f7;--text-2:#9da3b4;--text-3:#555c70;--border:hsla(0,0%,100%,.07);--border-2:hsla(0,0%,100%,.12);--shadow-sm:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 4px 16px rgba(0,0,0,.4);--shadow-lg:0 12px 40px rgba(0,0,0,.5)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:15px;scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--text-1);line-height:1.6;-webkit-font-smoothing:antialiased;transition:background var(--transition),color var(--transition)}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;background:none}button,input,select,textarea{font-family:var(--font)}ul{list-style:none}img{display:block;max-width:100%}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-2);border-radius:99px}.app-shell{height:100dvh}.app-shell,.sidebar{display:flex;overflow:hidden}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--sidebar-bg);border-right:1px solid var(--border);flex-direction:column;transition:width var(--transition),background var(--transition)}.sidebar-top{padding:14px 14px 10px;justify-content:space-between;border-bottom:1px solid var(--border)}.logo,.sidebar-top{display:flex;align-items:center}.logo{gap:8px;font-weight:600;font-size:1rem;color:var(--text-1)}.logo-mark{width:28px;height:28px;background:var(--accent);border-radius:7px;display:grid;place-items:center;color:#fff;font-size:.75rem;font-weight:700;letter-spacing:-.02em}.sidebar-icon-btn{width:30px;height:30px;border-radius:var(--radius-sm);display:grid;place-items:center;color:var(--text-3);transition:background var(--transition),color var(--transition)}.sidebar-icon-btn:hover{background:var(--bg-3);color:var(--text-1)}.new-chat-btn{margin:10px 14px;display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--accent);color:#fff;border-radius:var(--radius-md);font-size:.85rem;font-weight:500;transition:opacity var(--transition),transform var(--transition)}.new-chat-btn:hover{opacity:.88;transform:translateY(-1px)}.new-chat-btn svg{flex-shrink:0}.sidebar-section-label{padding:12px 18px 4px;font-size:.7rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-3)}.sidebar-nav{padding:4px 8px}.nav-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-md);font-size:.875rem;color:var(--text-2);cursor:pointer;transition:background var(--transition),color var(--transition);white-space:nowrap;overflow:hidden}.nav-item:hover{background:var(--bg-3);color:var(--text-1)}.nav-item.active{background:var(--accent-dim);color:var(--accent)}.nav-item svg{flex-shrink:0}.nav-item .nav-label{overflow:hidden;text-overflow:ellipsis}.sidebar-history{flex:1 1;overflow-y:auto;padding:0 8px 8px}.history-item{padding:7px 10px;border-radius:var(--radius-md);font-size:.82rem;color:var(--text-2);cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background var(--transition),color var(--transition)}.history-item:hover{background:var(--bg-3);color:var(--text-1)}.sidebar-footer{border-top:1px solid var(--border);padding:10px 8px}.user-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-md);cursor:pointer;transition:background var(--transition)}.user-row:hover{background:var(--bg-3)}.avatar{width:30px;height:30px;border-radius:50%;background:var(--accent-dim);border:1.5px solid var(--accent-border);display:grid;place-items:center;font-size:.75rem;font-weight:600;color:var(--accent);flex-shrink:0}.user-info{flex:1 1;min-width:0}.user-name{font-size:.82rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-plan{font-size:.7rem;color:var(--text-3)}.main{flex:1 1;flex-direction:column;overflow:hidden}.main,.topbar{display:flex;background:var(--bg)}.topbar{height:var(--topbar-h);border-bottom:1px solid var(--border);align-items:center;padding:0 20px;gap:12px;flex-shrink:0}.topbar-title{flex:1 1;font-size:.9rem;font-weight:500;color:var(--text-2)}.topbar-actions{display:flex;align-items:center;gap:6px}.icon-btn{width:34px;height:34px;border-radius:var(--radius-md);display:grid;place-items:center;color:var(--text-3);transition:background var(--transition),color var(--transition)}.icon-btn:hover{background:var(--bg-3);color:var(--text-1)}.btn{display:inline-flex;align-items:center;gap:7px;padding:9px 18px;border-radius:var(--radius-md);font-size:.875rem;font-weight:500;transition:all var(--transition);cursor:pointer;border:none}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{opacity:.88;transform:translateY(-1px);box-shadow:0 4px 14px rgba(74,144,217,.35)}.btn-primary:disabled{opacity:.5;transform:none;box-shadow:none;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--text-2);border:1px solid var(--border-2)}.btn-ghost:hover{background:var(--bg-3);color:var(--text-1)}.btn-danger{background:transparent;color:#e05c5c;border:1px solid rgba(224,92,92,.25)}.btn-danger:hover{background:rgba(224,92,92,.08)}.btn-outline{background:transparent;border:1px solid var(--border-2);color:var(--text-1)}.btn-outline:hover{background:var(--bg-3)}.card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;transition:border-color var(--transition),box-shadow var(--transition)}.card:hover{border-color:var(--border-2);box-shadow:var(--shadow-sm)}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:99px;font-size:.7rem;font-weight:600;letter-spacing:.03em}.badge-blue{background:var(--accent-dim);color:var(--accent)}.badge-green{background:rgba(52,199,89,.12);color:#2ab75a}.badge-gray{background:var(--bg-3);color:var(--text-3)}.theme-toggle{width:34px;height:34px;border-radius:var(--radius-md);display:grid;place-items:center;color:var(--text-3);cursor:pointer;transition:background var(--transition),color var(--transition)}.theme-toggle:hover{background:var(--bg-3);color:var(--text-1)}.page-content{flex:1 1;overflow-y:auto;padding:32px 40px}.page-header{margin-bottom:28px}.page-header h1{font-size:1.5rem;font-weight:600;letter-spacing:-.02em;margin-bottom:4px}.page-header p{font-size:.9rem;color:var(--text-3)}.form-group{margin-bottom:18px}.form-label{display:block;font-size:.8rem;font-weight:500;color:var(--text-2);margin-bottom:6px;letter-spacing:.01em}.form-input,.form-select,.form-textarea{width:100%;padding:9px 13px;background:var(--bg);border:1px solid var(--border-2);border-radius:var(--radius-md);color:var(--text-1);font-family:var(--font);font-size:.875rem;transition:border-color var(--transition),box-shadow var(--transition);outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.form-textarea{resize:vertical;min-height:80px}.form-select{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer}.form-hint{font-size:.75rem;color:var(--text-3);margin-top:5px}.switch-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--border)}.switch-row:last-child{border-bottom:none}.switch-info h4{font-size:.875rem;font-weight:500}.switch-info p{font-size:.78rem;color:var(--text-3);margin-top:1px}.switch{position:relative;width:40px;height:22px;flex-shrink:0;display:inline-block}.switch input{opacity:0;width:0;height:0}.switch-track{position:absolute;inset:0;background:var(--bg-3);border-radius:99px;cursor:pointer;transition:background var(--transition);border:1px solid var(--border-2)}.switch input:checked+.switch-track{background:var(--accent);border-color:var(--accent)}.switch-track:after{content:"";position:absolute;top:3px;left:3px;width:14px;height:14px;border-radius:50%;background:#fff;transition:transform var(--transition);box-shadow:0 1px 3px rgba(0,0,0,.2)}.switch input:checked+.switch-track:after{transform:translateX(18px)}.divider{height:1px;background:var(--border);margin:24px 0}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.fade-up{animation:fadeUp .3s ease forwards}@media (max-width:768px){.sidebar{position:fixed;z-index:100;height:100dvh;transform:translateX(-100%)}.sidebar.open{transform:translateX(0);box-shadow:var(--shadow-lg)}.page-content{padding:20px 18px}}