:root{--bg:#f7f7f8;--panel:#fff;--sidebar:#202123;--sidebar2:#343541;--ink:#202123;--muted:#6b7280;--line:#e5e7eb;--green:#10a37f;--green2:#0d8a6b;--soft:#ecfdf5;--shadow:0 10px 30px #1118270d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;height:100vh;overflow:hidden}.app{display:flex;height:100vh}.sidebar{width:252px;background:var(--sidebar);color:#ececf1;padding:14px 12px;display:flex;flex-direction:column}.brand{display:flex;gap:10px;align-items:center;padding:8px 10px 18px}.brand b{display:block;font-size:15px}.brand small{display:block;color:#a7a7b0;font-size:11px;margin-top:2px}.logo,.welcome-icon{display:grid;place-items:center}.logo{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,#10a37f,#7c3aed);color:white;font-size:18px}.new-task{border:1px solid #565869;background:transparent;color:#fff;border-radius:7px;padding:10px;text-align:left;cursor:pointer;margin-bottom:18px}.new-task:hover{background:#2b2c36}.nav-title,.history-title{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:#8e8ea0;padding:0 10px 7px}.nav button{width:100%;border:0;background:transparent;color:#d9d9e3;padding:10px;border-radius:7px;display:flex;align-items:center;gap:10px;cursor:pointer;text-align:left;margin:2px 0}.nav button:hover,.nav button.active{background:var(--sidebar2);color:#fff}.nav button.active{box-shadow:inset 3px 0 var(--green)}.sidebar-bottom{margin-top:auto}.status{color:#a7a7b0;font-size:12px;padding:12px 10px;border-top:1px solid #3e3f4b;margin-bottom:12px;display:flex;gap:8px;align-items:center}.status i{width:7px;height:7px;background:#f59e0b;border-radius:50%}.status.ok i{background:#10a37f}.status.err i{background:#ef4444}.history{max-height:180px;overflow:auto}.history button{display:block;width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#bfc0ca;border:0;background:transparent;text-align:left;border-radius:6px;padding:8px 10px;cursor:pointer}.history button:hover{background:#2b2c36;color:#fff}.main{flex:1;min-width:0;display:grid;grid-template-columns:minmax(420px,1fr) minmax(360px,42%);grid-template-rows:auto 1fr;gap:0 18px;padding:22px 26px}header{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--line)}h1,h2,p{margin:0}.eyebrow{font-size:10px;letter-spacing:.12em;color:#9ca3af;font-weight:700}.main h1{font-size:25px;margin-top:4px}.top-actions{display:flex;align-items:center;gap:10px}.model-chip{font-size:12px;background:var(--soft);color:#047857;border:1px solid #a7f3d0;border-radius:999px;padding:6px 10px}.ghost{border:1px solid var(--line);background:#fff;border-radius:8px;color:#6b7280;padding:7px 10px;cursor:pointer}.workspace,.results{min-height:0;padding-top:18px}.workspace{display:flex;flex-direction:column}.conversation{flex:1;overflow:auto;padding:10px 8px 18px}.welcome{text-align:center;max-width:610px;margin:10vh auto 0}.welcome-icon{width:48px;height:48px;margin:0 auto 16px;border-radius:16px;background:#fff;color:var(--green);box-shadow:var(--shadow);font-size:24px}.welcome h2{font-size:24px;margin-bottom:8px}.welcome p{color:var(--muted);max-width:470px;margin:auto}.suggestions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:24px}.suggestions button{background:#fff;border:1px solid var(--line);color:#4b5563;border-radius:999px;padding:8px 12px;cursor:pointer}.suggestions button:hover{border-color:#9ca3af}.msg{display:flex;gap:10px;margin:16px auto;max-width:720px}.avatar{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:#e5e7eb;font-size:13px;flex:0 0 auto}.msg.user .avatar{background:#d1fae5;color:#047857}.bubble{background:#fff;border:1px solid var(--line);padding:11px 14px;border-radius:12px;white-space:pre-wrap;word-break:break-word;box-shadow:0 2px 8px #11182705}.msg.user .bubble{background:#f0fdf4;border-color:#bbf7d0}.composer-wrap{padding:0 5px}.composer{background:#fff;border:1px solid #d1d5db;border-radius:14px;box-shadow:0 4px 16px #1118270a;padding:10px}.composer textarea{width:100%;border:0;outline:0;resize:none;min-height:72px;max-height:180px;font:15px/1.5 inherit}.composer-bar{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #f1f1f2;padding-top:8px}.attach{font-size:12px;color:#6b7280;cursor:pointer}.attach input{display:none}.composer-right{display:flex;gap:8px;align-items:center}.composer select{border:0;color:#6b7280;background:#fafafa;border-radius:7px;padding:7px;font-size:12px}.send{width:34px;height:34px;border:0;border-radius:9px;background:var(--green);color:#fff;cursor:pointer;font-size:16px}.send:hover{background:var(--green2)}.send:disabled{opacity:.5;cursor:wait}.hint{font-size:11px;color:#9ca3af;padding:8px 4px;text-align:center}.attachment{font-size:12px;color:#047857;background:#ecfdf5;padding:7px 10px;border-radius:8px;margin:0 0 7px}.results{border-left:1px solid var(--line);padding-left:18px;display:flex;flex-direction:column}.results-head{display:flex;justify-content:space-between;align-items:center;padding:0 5px 12px}.results h2{font-size:18px;margin-top:3px}.result-empty,.result-card{background:#fff;border:1px solid var(--line);border-radius:14px;min-height:260px;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#9ca3af;text-align:center;overflow:auto;padding:18px}.empty-icon{font-size:28px;color:#d1d5db;margin-bottom:10px}.result-card{align-items:stretch;justify-content:flex-start;text-align:left;color:var(--ink)}.result-card img{max-width:100%;max-height:62vh;object-fit:contain;border-radius:10px;background:#f3f4f6}.result-text{white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.7}.result-card .toolbar{display:flex;gap:8px;margin-top:12px}.toolbar button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:7px 10px;cursor:pointer}.toolbar button.primary{color:#fff;background:var(--green);border-color:var(--green)}.chart-wrap{width:100%;overflow:auto}.chart-wrap img{width:100%;height:auto}.slides{display:grid;gap:12px;width:100%}.slides img{width:100%;border-radius:9px;box-shadow:var(--shadow)}.prototype-frame{width:100%;height:100%;min-height:400px;border:1px solid var(--line);border-radius:10px}.loading{color:#6b7280}.loading::after{content:"";display:inline-block;width:14px;height:14px;border:2px solid #d1d5db;border-top-color:var(--green);border-radius:50%;vertical-align:-3px;margin-left:8px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:980px){body{overflow:auto}.app{height:auto;min-height:100vh;flex-direction:column}.sidebar{width:100%;padding:10px}.brand{padding-bottom:10px}.nav{display:flex;gap:4px;overflow:auto}.nav-title,.sidebar-bottom{display:none}.nav button{width:auto;white-space:nowrap}.nav button span{display:none}.main{grid-template-columns:1fr;padding:15px;min-height:calc(100vh - 90px)}.results{border-left:0;padding-left:0}.conversation{min-height:360px}.welcome{margin:40px auto}.results{min-height:430px}}

.storage-box{margin:0 6px 12px;padding:10px;background:#2b2c36;border:1px solid #3e3f4b;border-radius:9px}.storage-line{display:flex;justify-content:space-between;gap:8px;color:#a7a7b0;font-size:11px}.storage-line b{color:#d9d9e3;font-weight:600}.storage-track{height:5px;background:#444654;border-radius:999px;overflow:hidden;margin-top:7px}.storage-track i{display:block;width:0;height:100%;background:#10a37f;border-radius:inherit;transition:width .25s,background .25s}.storage-box.warning .storage-track i{background:#f59e0b}.storage-box.critical .storage-track i{background:#ef4444}.storage-warn{color:#fbbf24;font-size:11px;line-height:1.45;margin-top:7px}.storage-box.critical .storage-warn{color:#fca5a5}.history-row{display:flex;align-items:center;gap:3px;border-radius:6px}.history-row:hover{background:#2b2c36}.history-row .history-open{flex:1;min-width:0}.history-row .history-delete{flex:0 0 30px;width:30px;padding:8px 5px;text-align:center;color:#8e8ea0;opacity:.55}.history-row:hover .history-delete,.history-delete:focus{opacity:1}.history-row .history-delete:hover{background:#4b2c32;color:#fca5a5}.history-empty{color:#737481;font-size:11px;padding:7px 10px}.storage-save-warning{margin-top:12px;padding:10px 12px;border-radius:8px;background:#fffbeb;border:1px solid #fde68a;color:#92400e;font-size:12px}

/* mobile-history-storage */
@media(max-width:980px){.sidebar-bottom{display:block;margin-top:10px}.status{margin:8px 6px;padding:10px 4px}.storage-box{margin-bottom:10px}.history-title{padding:0 10px 5px}.history{max-height:150px}}