:root{--bg:#f8fafc;--panel:#fff;--panel2:#f1f5f9;--line:#e2e8f0;--text:#0f172a;--muted:#64748b;--accent:#2563eb;--accent2:#1d4ed8;--danger:#dc2626;--shadow:0 10px 35px rgba(15,23,42,.08);--radius:18px}*{box-sizing:border-box}html,body{height:100%;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg)}button,input,textarea,select{font:inherit}button{cursor:pointer}.app-shell{height:100%;display:flex;overflow:hidden}.sidebar{width:292px;background:#0f172a;color:#e2e8f0;padding:18px;display:flex;flex-direction:column;gap:16px;flex-shrink:0}.brand-row{display:flex;align-items:center;gap:11px}.brand-row strong{display:block;font-size:16px}.brand-row span{display:block;color:#94a3b8;font-size:11px;margin-top:2px}.brand-mark{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:#2563eb;color:#fff;font-weight:800;box-shadow:0 6px 18px rgba(37,99,235,.35)}.sidebar-section{min-height:0}.sidebar-section.grow{flex:1;display:flex;flex-direction:column}.section-title{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#94a3b8;margin:0 0 8px}.text-input,.num-input,select,textarea{width:100%;border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:10px 12px;color:var(--text);outline:none}.sidebar .text-input{background:#111c31;border-color:#23324d;color:#fff}.text-input:focus,.num-input:focus,select:focus,textarea:focus{border-color:#7aa2ff;box-shadow:0 0 0 3px rgba(37,99,235,.08)}.primary-btn,.ghost-btn,.send-btn,.icon-btn,.advanced-btn{border:0;border-radius:12px;min-height:40px;padding:9px 13px;display:inline-flex;align-items:center;justify-content:center;gap:8px}.primary-btn{background:var(--accent);color:#fff}.primary-btn:hover{background:var(--accent2)}.ghost-btn{background:var(--panel2);color:var(--text)}.sidebar .ghost-btn{background:#152137;color:#dbeafe}.full{width:100%}.small{min-height:34px;padding:7px 10px}.chat-list{overflow:auto;display:flex;flex-direction:column;gap:7px}.chat-item{padding:11px 12px;border-radius:12px;background:transparent;color:#cbd5e1;display:flex;align-items:center;justify-content:space-between;gap:8px}.chat-item:hover{background:#152137}.chat-item.active{background:#1d4ed8;color:#fff}.chat-title-small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-meta{font-size:10px;opacity:.72;margin-top:3px}.chat-del{opacity:.6;background:none;border:0;color:inherit}.storage-note{font-size:10px;color:#64748b;line-height:1.5}.main{min-width:0;flex:1;display:flex;flex-direction:column;background:#fff}.topbar{height:68px;padding:0 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}.title-wrap{display:flex;align-items:center;gap:10px;min-width:0}.title-wrap h1{font-size:17px;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.status-badge{font-size:11px;padding:4px 8px;border-radius:999px;background:#ecfdf5;color:#047857}.top-actions{display:flex;gap:6px}.icon-btn{width:38px;height:38px;background:var(--panel2);color:var(--text);padding:0}.icon-btn:hover{background:#e2e8f0}.mobile-only{display:none}.settings-bar{padding:12px 22px;border-bottom:1px solid var(--line);background:#fff;display:flex;gap:10px;align-items:end;flex-wrap:wrap}.field{display:flex;flex-direction:column;gap:6px;min-width:130px}.field.wide{min-width:280px;flex:1}.field label{font-size:11px;color:var(--muted)}.settings-bar select{min-width:150px}.settings-bar input[type=range]{accent-color:var(--accent)}.compact{min-width:90px}.switch-label{display:inline-flex;align-items:center;gap:8px;color:var(--text)!important;white-space:nowrap}.switch-label input{position:absolute;opacity:0}.switch{width:36px;height:20px;border-radius:999px;background:#cbd5e1;position:relative;transition:.2s;display:inline-block}.switch:after{content:"";position:absolute;width:16px;height:16px;top:2px;left:2px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);transition:.2s}.switch-label input:checked+.switch{background:var(--accent)}.switch-label input:checked+.switch:after{transform:translateX(16px)}.advanced-btn{background:#eff6ff;color:#1d4ed8}.advanced-panel{padding:12px 22px;border-bottom:1px solid var(--line);display:flex;gap:12px;flex-wrap:wrap;background:#f8fafc}.hidden{display:none!important}.chat-area{flex:1;overflow:auto;padding:24px clamp(16px,4vw,60px);background:linear-gradient(#fff,#f8fafc)}.welcome{max-width:780px;margin:12vh auto 0;text-align:center}.welcome-icon{width:52px;height:52px;margin:auto;border-radius:16px;background:#eff6ff;color:#2563eb;display:grid;place-items:center;font-size:25px}.welcome h2{margin:16px 0 8px;font-size:29px}.welcome p{color:var(--muted);margin:0 auto;max-width:620px}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:22px}.quick{background:#fff;border:1px solid var(--line);padding:14px;border-radius:14px;text-align:left;color:#334155}.quick:hover{border-color:#93c5fd;background:#eff6ff}.messages{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:18px}.message{display:flex;gap:12px;align-items:flex-start}.message.user{flex-direction:row-reverse}.avatar{width:34px;height:34px;flex:none;border-radius:11px;display:grid;place-items:center;background:#e2e8f0;color:#334155;font-size:13px;font-weight:700}.message.user .avatar{background:#2563eb;color:white}.bubble{max-width:min(78%,820px);padding:13px 15px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:0 2px 8px rgba(15,23,42,.03)}.message.user .bubble{background:#eff6ff;border-color:#bfdbfe}.message-text{line-height:1.65;white-space:pre-wrap;overflow-wrap:anywhere}.message-text code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.message-text pre{white-space:pre-wrap;background:#0b1220;color:#dbeafe;padding:12px;border-radius:12px;overflow:auto}.message-text a{color:#2563eb}.message-head{font-size:11px;color:var(--muted);margin-bottom:7px}.reasoning{border-left:3px solid #cbd5e1;padding-left:10px;color:#64748b;margin-bottom:10px;font-size:12px}.message-actions{display:flex;gap:4px;margin-top:8px}.mini-btn{background:transparent;border:0;color:#64748b;padding:4px 7px;border-radius:8px;font-size:11px}.mini-btn:hover{background:#e2e8f0}.attachment-chip{display:inline-flex;align-items:center;gap:7px;padding:7px 9px;border:1px solid var(--line);border-radius:10px;background:#f8fafc;margin:4px 4px 0 0;font-size:11px}.attachment-chip img{width:38px;height:38px;object-fit:cover;border-radius:7px}.composer-wrap{padding:12px 22px 16px;border-top:1px solid var(--line);background:#fff}.composer{max-width:980px;margin:0 auto;border:1px solid #cbd5e1;border-radius:18px;padding:10px;background:#fff;box-shadow:var(--shadow)}.composer textarea{border:0;box-shadow:none;resize:none;min-height:44px;max-height:170px;padding:5px 2px}.composer textarea:focus{border:0;box-shadow:none}.composer-actions{display:flex;justify-content:space-between;align-items:center;gap:10px}.left-actions{display:flex;align-items:center;gap:7px}.attach-btn{font-size:12px;background:#f1f5f9;color:#334155;padding:8px 11px;border-radius:10px;cursor:pointer}.attach-btn input{display:none}.send-btn{background:#0f172a;color:#fff;padding:8px 15px}.send-btn:disabled{opacity:.45;cursor:not-allowed}.disclaimer{max-width:980px;margin:7px auto 0;font-size:10px;color:#94a3b8}.attachment-strip{max-width:980px;margin:0 auto 8px}.attachment-strip:empty{display:none}.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.55);display:grid;place-items:center;padding:18px;z-index:20}.modal{background:#fff;width:min(1000px,100%);max-height:90vh;overflow:hidden;border-radius:20px;box-shadow:0 30px 70px rgba(15,23,42,.25)}.small-modal{width:min(500px,100%)}.modal-head{padding:18px 20px;border-bottom:1px solid var(--line);display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.modal-head h3{margin:0}.modal-head p{margin:5px 0 0;color:var(--muted);font-size:12px}.provider-layout{display:grid;grid-template-columns:290px 1fr;min-height:520px}.provider-list{border-right:1px solid var(--line);padding:14px;overflow:auto}.provider-card{padding:12px;border:1px solid var(--line);border-radius:13px;margin-bottom:9px;display:flex;justify-content:space-between;gap:8px}.provider-card.active{border-color:#93c5fd;background:#eff6ff}.provider-card-title{font-weight:700;font-size:13px}.provider-card-meta{font-size:10px;color:var(--muted);margin-top:3px}.provider-card-actions{display:flex;gap:4px}.provider-editor{padding:20px;overflow:auto}.editor-empty{display:grid;place-items:center;height:100%;min-height:400px;color:#94a3b8}.editor-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.editor-grid .wide{grid-column:1/-1}.modal-actions{display:flex;justify-content:flex-end;gap:8px;padding-top:14px}.provider-save-row{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,15px);padding:10px 14px;border-radius:12px;background:#0f172a;color:#fff;font-size:12px;opacity:0;pointer-events:none;transition:.2s;z-index:50}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:900px){.sidebar{position:fixed;z-index:30;left:-310px;top:0;bottom:0;transition:.22s}.sidebar.open{left:0}.mobile-only{display:inline-flex}.settings-bar{align-items:stretch}.settings-bar .field{min-width:calc(50% - 10px)}.advanced-panel .field{min-width:calc(50% - 10px)}.quick-grid{grid-template-columns:1fr}.bubble{max-width:88%}.provider-layout{grid-template-columns:1fr}.provider-list{border-right:0;border-bottom:1px solid var(--line);max-height:230px}.editor-grid{grid-template-columns:1fr}.editor-grid .wide{grid-column:auto}}
@media(max-width:560px){.topbar{height:60px;padding:0 12px}.settings-bar,.advanced-panel{padding:10px 12px}.settings-bar .field{min-width:100%;}.advanced-panel .field{min-width:100%}.chat-area{padding:18px 10px}.welcome{margin-top:8vh}.welcome h2{font-size:23px}.message{gap:7px}.avatar{width:30px;height:30px}.bubble{max-width:calc(100% - 38px);padding:11px 12px}.composer-wrap{padding:9px 10px 12px}.disclaimer{font-size:9px}.provider-modal{max-height:95vh}.modal-head{padding:14px}.provider-editor{padding:14px}}