:root{--bg: #f3f7fc;--bg-2: #e6eefb;--panel: #ffffff;--ink: #172232;--muted: #607089;--line: #d8e2f1;--accent: #1f6feb;--accent-2: #22a699;--shadow-soft: 0 8px 26px rgba(16, 35, 74, .08);--shadow-hover: 0 12px 28px rgba(16, 35, 74, .16)}*{box-sizing:border-box}body{margin:0;font-family:Manrope,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--ink);background:radial-gradient(circle at 0% 0%,#ffffff 0,transparent 34%),radial-gradient(circle at 100% 0%,#dde8ff 0,transparent 30%),linear-gradient(135deg,var(--bg),var(--bg-2));min-height:100vh}button,input,textarea,select{font:inherit}button,select,input,textarea,.chat-item,.msg{transition:transform .14s ease,box-shadow .18s ease,border-color .18s ease,background-color .18s ease,color .18s ease}button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,.chat-item:focus-visible,.side-link:focus-visible{outline:2px solid rgba(31,111,235,.35);outline-offset:2px}.loading{min-height:100vh;display:grid;place-items:center}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(420px,100%);background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-soft);padding:24px;display:grid;gap:12px}.login-card h1{margin:0;font-size:26px}.login-card p{margin:0 0 8px;color:var(--muted)}.login-card input,.login-card button{border:1px solid var(--line);border-radius:12px;padding:12px}.login-card button{background:linear-gradient(135deg,#2b77f0,#1f6feb);color:#fff;border:0;cursor:pointer;box-shadow:0 8px 18px #1f6feb47}.login-card button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 12px 24px #1f6feb54}.error{color:#b00020}.app-shell{min-height:100vh;display:grid;grid-template-columns:320px 1fr}.sidebar{border-right:1px solid var(--line);background:#ffffffbd;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;flex-direction:column}.side-head{display:grid;gap:8px;padding:14px;border-bottom:1px solid var(--line)}.side-head button,.side-link{border:0;border-radius:12px;padding:10px;background:linear-gradient(135deg,#2b77f0,#1f6feb);color:#fff;cursor:pointer;box-shadow:0 8px 16px #1f6feb38}.side-link{display:block;text-align:center;text-decoration:none}.side-head select{border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}.side-head .secondary{background:linear-gradient(135deg,#58647c,#49566f)}.side-head button:hover:not(:disabled),.side-link:hover{transform:translateY(-1px);box-shadow:0 14px 24px #10234a40}.chat-list{padding:10px;display:grid;gap:8px;overflow:auto}.chat-item{text-align:left;border:1px solid var(--line);background:#ffffffe6;border-radius:12px;padding:11px;cursor:pointer;box-shadow:0 2px 8px #10234a0a}.chat-item:hover{border-color:#9bb8ec;transform:translateY(-1px);box-shadow:0 10px 20px #10234a1a}.chat-item.active{border-color:var(--accent);background:linear-gradient(135deg,#edf4ff,#e8f0ff);box-shadow:0 8px 20px #1f6feb29}.main{display:grid;grid-template-rows:auto 1fr auto;min-height:100vh}.topbar{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:14px 16px;border-bottom:1px solid var(--line);background:#ffffffd1;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.topbar select{border:1px solid var(--line);border-radius:12px;padding:9px 12px;background:#fff}.topbar select:hover{border-color:#9bb8ec}.chat-title{font-weight:650}.messages{overflow:auto;padding:16px;display:grid;gap:12px}.msg{border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:#fff;box-shadow:0 4px 14px #10234a0d}.msg.user{background:linear-gradient(135deg,#ebf4ff,#f2f8ff);border-color:#b6d0f6}.msg.assistant{background:linear-gradient(135deg,#fff,#f7fbff)}.role{font-size:12px;color:var(--muted);margin-bottom:4px;text-transform:uppercase}.content{white-space:pre-wrap;word-break:break-word}.hint{color:var(--muted);margin-top:40px;text-align:center}.composer{border-top:1px solid var(--line);padding:12px;display:grid;grid-template-columns:1fr auto;gap:10px;background:#ffffffd9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.composer textarea{width:100%;resize:vertical;border:1px solid var(--line);border-radius:12px;padding:12px;background:#fff;min-height:88px}.composer textarea:hover{border-color:#9bb8ec}.composer button{align-self:end;border:0;border-radius:12px;background:linear-gradient(135deg,#25b6a7,var(--accent-2));color:#fff;padding:10px 16px;cursor:pointer;box-shadow:0 8px 16px #22a69942}.composer button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 14px 24px #22a69954}button:disabled{opacity:.6;cursor:not-allowed}.files-page{min-height:100vh;background:#f5f8fc}.files-header{min-height:88px;padding:18px clamp(20px,4vw,64px);border-bottom:1px solid var(--line);background:#fbfdff;display:flex;align-items:center;justify-content:space-between;gap:24px}.files-header h1{margin:1px 0 0;font-size:26px;line-height:1.15;letter-spacing:-.02em}.files-kicker{color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.view-nav{display:flex;align-items:center;gap:4px;padding:4px;border:1px solid var(--line);border-radius:12px;background:#edf3fa}.view-nav button{border:0;border-radius:8px;padding:8px 13px;background:transparent;color:var(--muted);cursor:pointer}.view-nav button:hover{color:var(--ink);background:#f7faff}.view-nav button.active{color:var(--ink);background:#fbfdff;box-shadow:0 1px 4px #10234a1f}.files-main{width:min(1120px,calc(100% - 40px));margin:0 auto;padding:34px 0 64px}.files-toolbar{min-height:42px;display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}.breadcrumbs,.breadcrumbs span{display:flex;align-items:center;gap:7px;min-width:0}.breadcrumbs{overflow-x:auto}.breadcrumbs span>span{color:#9aa8ba}.breadcrumbs button{border:0;padding:5px 2px;background:transparent;color:var(--muted);cursor:pointer;white-space:nowrap}.breadcrumbs button:hover{color:var(--accent)}.new-folder-button,.folder-form button{border:1px solid var(--line);border-radius:10px;padding:9px 13px;background:#fbfdff;color:var(--ink);font-weight:650;cursor:pointer;white-space:nowrap}.new-folder-button:hover,.folder-form button:hover:not(:disabled){border-color:#9bb8ec;background:#edf4ff}.folder-form{display:flex;gap:8px;margin:-4px 0 18px;padding:14px;border:1px solid var(--line);border-radius:12px;background:#fbfdff}.folder-form input{width:min(380px,100%);border:1px solid var(--line);border-radius:9px;padding:9px 11px;background:#fbfdff}.folder-form button[type=submit]{border-color:var(--accent);background:var(--accent);color:#f9fbff}.drop-zone{min-height:116px;padding:22px;border:1px dashed #9eb1ca;border-radius:14px;background:#edf3fa;color:var(--muted);display:flex;align-items:center;justify-content:center;gap:12px;cursor:pointer}.drop-zone:hover,.drop-zone.active{border-color:var(--accent);background:#e7f0ff;color:var(--ink)}.drop-zone input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}.drop-icon{width:34px;height:34px;border-radius:50%;background:var(--accent);color:#f9fbff;display:grid;place-items:center;font-size:20px;font-weight:700}.files-error{margin-top:14px;padding:11px 13px;border:1px solid #e7b8bd;border-radius:10px;background:#fff1f2;color:#922d3a;font-size:14px;word-break:break-word}.file-list{margin-top:22px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fbfdff}.file-list-head,.file-row{display:grid;grid-template-columns:minmax(240px,1fr) 120px 200px;align-items:center;gap:18px}.file-list-head{padding:11px 16px;color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.file-row{min-height:60px;padding:8px 16px;border-top:1px solid var(--line)}.file-row:hover{background:#f3f7fc}.file-name{min-width:0;border:0;padding:4px 0;background:transparent;color:var(--ink);display:flex;align-items:center;gap:11px;text-align:left;cursor:pointer}.file-name span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-name:hover{color:var(--accent)}.item-icon{flex:0 0 auto;width:29px;height:29px;border-radius:8px;display:grid;place-items:center;font-size:14px}.item-icon.folder{background:#e5efff;color:var(--accent)}.item-icon.file{background:#e5f4f1;color:#147b70}.file-meta{color:var(--muted);font-size:13px}.files-empty{min-height:180px;border-top:1px solid var(--line);color:var(--muted);display:grid;place-content:center;gap:5px;text-align:center}.files-empty strong{color:var(--ink);font-size:16px}.file-skeleton{min-height:180px;border-top:1px solid var(--line);display:grid;align-content:center;gap:10px;padding:28px 16px}.file-skeleton span{width:min(620px,80%);height:14px;border-radius:7px;background:#e5ebf3}.file-skeleton span:nth-child(2){width:min(480px,66%)}.file-skeleton span:nth-child(3){width:min(560px,72%)}@media(max-width:900px){.app-shell{grid-template-columns:1fr;grid-template-rows:250px 1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line)}.file-list-head,.file-row{grid-template-columns:minmax(180px,1fr) 100px}.file-list-head span:last-child,.file-row>.file-meta:last-child{display:none}}@media(max-width:600px){.files-header{align-items:flex-start;flex-direction:column}.files-main{width:min(100% - 24px,1120px);padding-top:22px}.files-toolbar{align-items:stretch;flex-direction:column}.new-folder-button{align-self:flex-start}.folder-form{flex-wrap:wrap}.folder-form input{flex-basis:100%}.drop-zone{align-items:flex-start;flex-direction:column}.file-list-head,.file-row{grid-template-columns:1fr 72px;gap:10px;padding-left:10px;padding-right:10px}}