:root{--ink:#172033;--muted:#738097;--line:#e7eaf0;--panel:#fff;--canvas:#f4f6f9;--blue:#3e68ff;--blue-dark:#2f54db;--blue-soft:#edf1ff;--sidebar:#121827;--danger:#d94b54;--shadow:0 18px 50px rgba(29,40,65,.14);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--canvas)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{min-width:320px;background:var(--canvas)}button,input{font:inherit}button{color:inherit}.svg-sprite{position:absolute;width:0;height:0;overflow:hidden}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}[hidden]{display:none!important}
.app-shell{display:grid;grid-template-columns:256px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:28px 20px 22px;display:flex;flex-direction:column;color:#dce3f2;background:var(--sidebar);overflow:auto;z-index:30}.brand{display:flex;align-items:center;gap:12px;padding:0 8px 30px}.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:14px;color:#fff;background:var(--blue);box-shadow:0 10px 24px rgba(62,104,255,.28)}.brand-mark svg{width:24px;height:24px}.brand strong{display:block;font-size:19px;letter-spacing:.02em;color:#fff}.brand span{display:block;margin-top:3px;font-size:10px;letter-spacing:.16em;color:#78849d}.side-nav{display:grid;gap:7px}.nav-item{width:100%;height:46px;display:flex;align-items:center;gap:13px;padding:0 14px;border:0;border-radius:12px;color:#929db1;background:transparent;font-size:14px;cursor:pointer;transition:.2s}.nav-item:hover{color:#fff;background:rgba(255,255,255,.055)}.nav-item.active{color:#fff;background:rgba(62,104,255,.18);box-shadow:inset 3px 0 var(--blue)}.nav-item.active svg{color:#7392ff}.storage-card{margin-top:auto;display:flex;align-items:center;gap:12px;padding:16px 13px;border:1px solid rgba(255,255,255,.07);border-radius:16px;background:rgba(255,255,255,.035)}.storage-ring{width:50px;height:50px;flex:none;display:grid;place-content:center;text-align:center;border-radius:50%;border:3px solid #33405b;border-top-color:#6d8dff}.storage-ring span{font-size:14px;font-weight:700;line-height:1}.storage-ring small{margin-top:2px;color:#7e8aa1;font-size:9px}.storage-card strong{font-size:13px;color:#edf1fb}.storage-card p,.public-note p{margin:4px 0 0;color:#78849a;font-size:11px;line-height:1.45}.public-note{display:flex;gap:10px;padding:17px 8px 8px}.public-note>span{width:8px;height:8px;margin-top:4px;border-radius:50%;background:#55d6a0;box-shadow:0 0 0 4px rgba(85,214,160,.1)}.public-note strong{color:#bac4d7;font-size:12px}.side-footer{padding:18px 8px 0;color:#586378;font-size:10px;letter-spacing:.06em}
.workspace{min-width:0}.topbar{height:82px;display:flex;align-items:center;gap:22px;padding:0 34px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.86);backdrop-filter:blur(16px);position:sticky;top:0;z-index:20}.search-box{width:min(460px,46vw);height:44px;display:flex;align-items:center;gap:11px;padding:0 13px;border:1px solid var(--line);border-radius:13px;background:#f7f8fb;transition:.2s}.search-box:focus-within{border-color:#aebeff;background:#fff;box-shadow:0 0 0 4px var(--blue-soft)}.search-box svg{color:#8b96a9}.search-box input{width:100%;border:0;outline:0;color:var(--ink);background:transparent;font-size:14px}.search-box kbd{padding:3px 7px;border:1px solid #dde1e9;border-radius:6px;color:#9aa3b3;background:#fff;font:11px inherit;white-space:nowrap}.top-actions{margin-left:auto;display:flex;gap:10px}.button{min-height:42px;display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:0 16px;border:1px solid transparent;border-radius:11px;font-size:14px;font-weight:600;text-decoration:none;cursor:pointer;transition:.18s}.button:disabled{opacity:.55;cursor:wait}.button.primary{color:#fff;background:var(--blue);box-shadow:0 8px 18px rgba(62,104,255,.2)}.button.primary:hover{background:var(--blue-dark);transform:translateY(-1px)}.button.secondary{border-color:var(--line);background:#fff}.button.secondary:hover{border-color:#ccd3df;background:#fafbfc}.icon-button{width:40px;height:40px;display:inline-grid;place-items:center;padding:0;border:1px solid transparent;border-radius:10px;background:transparent;cursor:pointer}.icon-button:hover,.icon-button.active{border-color:var(--line);background:#fff}.mobile-menu{display:none}
.content{padding:34px}.content-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:26px}.content-heading h1{margin:8px 0 6px;font-size:clamp(25px,3vw,34px);line-height:1.2;letter-spacing:-.035em}.content-heading p{margin:0;color:var(--muted);font-size:14px}.breadcrumbs{min-height:18px;display:flex;align-items:center;gap:5px;color:var(--muted);font-size:13px}.breadcrumbs button{padding:0;border:0;color:inherit;background:none;cursor:pointer}.breadcrumbs button:hover{color:var(--blue)}.breadcrumbs svg{width:13px;height:13px}.view-controls{display:flex;padding:3px;border:1px solid var(--line);border-radius:12px;background:#ebedf2}.view-controls .icon-button{width:36px;height:34px;border:0;color:#8993a4}.view-controls .active{color:var(--ink);box-shadow:0 2px 7px rgba(22,31,49,.09)}.drop-zone{height:0;overflow:hidden;display:flex;align-items:center;justify-content:center;gap:10px;border:0 dashed #8da5ff;border-radius:16px;color:var(--blue);background:var(--blue-soft);opacity:0;transition:.2s}.drop-zone.visible{height:92px;margin-bottom:20px;border-width:2px;opacity:1}.drop-zone span{color:#7583a0;font-size:13px}.drop-icon{width:38px;height:38px;display:grid;place-items:center;border-radius:10px;background:#fff}.items-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(188px,1fr));gap:16px}.file-card{position:relative;min-width:0;padding:14px;border:1px solid var(--line);border-radius:16px;background:var(--panel);cursor:default;transition:.18s}.file-card:hover{transform:translateY(-2px);border-color:#d7ddec;box-shadow:0 13px 30px rgba(39,48,70,.08)}.file-card.selected{border-color:#9fb1ff;box-shadow:0 0 0 3px var(--blue-soft)}.card-preview{height:132px;display:grid;place-items:center;overflow:hidden;border-radius:11px;background:#f5f7fa}.card-preview img{width:100%;height:100%;object-fit:cover}.file-icon{width:54px;height:62px;display:grid;place-items:center;position:relative;border-radius:9px;color:#6682eb;background:#e8edff}.file-icon:after{content:attr(data-ext);position:absolute;bottom:8px;font-size:10px;font-weight:800;letter-spacing:.04em}.folder-icon{width:72px;height:55px;position:relative;border-radius:8px 10px 10px 10px;background:linear-gradient(145deg,#7d98ff,#4e70f1);box-shadow:inset 0 2px rgba(255,255,255,.24),0 8px 18px rgba(78,112,241,.2)}.folder-icon:before{content:"";position:absolute;left:0;top:-7px;width:30px;height:12px;border-radius:7px 7px 0 0;background:#6e8bf7}.card-info{display:flex;align-items:center;gap:9px;padding-top:12px;min-width:0}.card-copy{min-width:0;flex:1}.card-copy strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}.card-copy span{display:block;margin-top:4px;color:var(--muted);font-size:12px}.card-menu{width:30px;height:30px;color:#8993a5}.items-grid.list{display:block;border:1px solid var(--line);border-radius:15px;background:#fff;overflow:hidden}.items-grid.list .file-card{display:grid;grid-template-columns:50px minmax(0,1fr) 150px 34px;align-items:center;padding:11px 14px;border:0;border-bottom:1px solid var(--line);border-radius:0}.items-grid.list .file-card:last-child{border-bottom:0}.items-grid.list .file-card:hover{transform:none;box-shadow:none;background:#fafbfc}.items-grid.list .card-preview{width:42px;height:42px;border-radius:9px}.items-grid.list .folder-icon{width:38px;height:30px;border-radius:5px}.items-grid.list .folder-icon:before{top:-4px;width:17px;height:7px}.items-grid.list .file-icon{width:32px;height:38px;border-radius:5px}.items-grid.list .file-icon:after{bottom:4px;font-size:7px}.items-grid.list .card-info{display:contents}.items-grid.list .card-copy span{grid-column:3;grid-row:1;margin:0}
.empty-state{max-width:420px;margin:85px auto;text-align:center}.empty-visual{width:82px;height:82px;display:grid;place-items:center;margin:0 auto 20px;border-radius:24px;color:var(--blue);background:var(--blue-soft);transform:rotate(-4deg)}.empty-visual svg{width:38px;height:38px}.empty-state h2{margin:0 0 8px;font-size:20px}.empty-state p{margin:0 0 22px;color:var(--muted);font-size:14px}.modal-backdrop,.preview-panel{position:fixed;inset:0;z-index:80;background:rgba(9,14,27,.56);backdrop-filter:blur(5px)}.modal-backdrop{display:grid;place-items:center;padding:18px}.modal{width:min(440px,100%);padding:25px;border-radius:20px;background:#fff;box-shadow:var(--shadow)}.modal-head{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:22px}.modal h2{margin:4px 0 0;font-size:22px}.eyebrow{color:var(--blue);font-size:10px;font-weight:800;letter-spacing:.15em}.modal label{display:block;margin-bottom:8px;font-size:13px;font-weight:700}.text-input{width:100%;height:46px;padding:0 13px;border:1px solid #dfe3ea;border-radius:11px;outline:0}.text-input:focus{border-color:#93a9ff;box-shadow:0 0 0 4px var(--blue-soft)}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}
.preview-panel{display:grid;grid-template-columns:1fr min(430px,92vw);background:transparent;backdrop-filter:none}.preview-scrim{border:0;background:rgba(9,14,27,.55);backdrop-filter:blur(4px)}.preview-drawer{min-width:0;padding:28px;background:#fff;box-shadow:-20px 0 60px rgba(0,0,0,.16);overflow-y:auto;animation:slide-in .22s ease-out}.preview-drawer header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.preview-drawer h2{max-width:310px;margin:5px 0 0;overflow-wrap:anywhere;font-size:20px}.preview-stage{min-height:280px;display:grid;place-items:center;margin:28px 0 22px;overflow:hidden;border-radius:16px;background:#f3f5f8}.preview-stage img{display:block;width:100%;max-height:520px;object-fit:contain}.preview-stage .file-icon{transform:scale(1.5)}.file-details{display:grid;grid-template-columns:90px 1fr;gap:12px;padding:19px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px}.file-details dt{color:var(--muted)}.file-details dd{margin:0;overflow-wrap:anywhere}.preview-download{width:100%;margin-top:20px}@keyframes slide-in{from{transform:translateX(35px);opacity:.6}}
.context-menu{position:fixed;z-index:100;width:142px;padding:6px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:var(--shadow)}.context-menu button{width:100%;padding:9px 11px;border:0;border-radius:7px;text-align:left;font-size:13px;background:transparent;cursor:pointer}.context-menu button:hover{background:#f3f5f8}.context-menu .danger{color:var(--danger)}.upload-tray{position:fixed;right:24px;bottom:24px;z-index:70;width:min(360px,calc(100vw - 32px));border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow);overflow:hidden}.upload-tray-head{display:flex;align-items:center;justify-content:space-between;padding:13px 15px;border-bottom:1px solid var(--line)}.upload-tray-head strong{font-size:14px}.upload-item{padding:12px 15px;border-bottom:1px solid var(--line)}.upload-item:last-child{border:0}.upload-copy{display:flex;justify-content:space-between;gap:12px;margin-bottom:8px;font-size:12px}.upload-copy span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.progress{height:5px;overflow:hidden;border-radius:5px;background:#e9edf4}.progress span{display:block;width:0;height:100%;border-radius:inherit;background:var(--blue);transition:width .2s}.toast-stack{position:fixed;right:24px;top:98px;z-index:120;display:grid;gap:9px}.toast{min-width:260px;max-width:360px;display:flex;align-items:center;gap:10px;padding:13px 15px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:var(--shadow);font-size:13px;animation:toast-in .2s ease}.toast svg{flex:none;color:#2caf78}.toast.error svg{color:var(--danger)}@keyframes toast-in{from{transform:translateY(-8px);opacity:0}}.skeleton{min-height:224px;background:linear-gradient(90deg,#f0f2f5 25%,#f7f8fa 40%,#f0f2f5 65%);background-size:400% 100%;animation:shimmer 1.3s infinite}@keyframes shimmer{to{background-position:-100% 0}}
@media(max-width:860px){.app-shell{grid-template-columns:1fr}.sidebar{position:fixed;left:0;transform:translateX(-100%);width:256px;transition:transform .2s;box-shadow:20px 0 50px rgba(0,0,0,.22)}.sidebar.open{transform:translateX(0)}.mobile-menu{display:inline-grid;flex:none}.topbar{padding:0 18px}.search-box{width:auto;min-width:0;flex:1}.search-box kbd{display:none}.content{padding:25px 18px}.top-actions .button span{display:none}.top-actions .button{width:42px;padding:0}.items-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:11px}.card-preview{height:112px}}@media(max-width:520px){.topbar{gap:9px;padding:0 12px}.top-actions{gap:6px}.content-heading{align-items:flex-start}.view-controls{display:none}.items-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.file-card{padding:10px}.card-preview{height:100px}.preview-panel{grid-template-columns:1fr}.preview-scrim{display:none}.preview-drawer{padding:22px}.drop-zone span{display:none}.toast-stack{left:16px;right:16px}.toast{min-width:0}}

/* Albums */
.field-hint{margin:9px 2px 0;color:var(--muted);font-size:12px;line-height:1.5}.album-cover{display:grid;grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(2,1fr);gap:3px;padding:3px;background:#e9edff}.album-cover img{width:100%;height:100%;min-height:0;object-fit:cover;border-radius:5px}.album-cover img:only-child{grid-column:1/-1;grid-row:1/-1}.album-empty{grid-column:1/-1;grid-row:1/-1;display:grid;place-items:center;color:#5877ed;background:linear-gradient(145deg,#edf1ff,#dce4ff)}.album-empty svg{width:38px;height:38px}.album-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:6px}.album-grid .file-card{aspect-ratio:1;padding:0;border:0;border-radius:7px;overflow:hidden;background:#e9ebef}.album-grid .file-card:hover{transform:none;box-shadow:0 8px 24px rgba(20,28,45,.18)}.album-grid .card-preview{width:100%;height:100%;border-radius:0}.album-grid .card-preview img{transition:transform .3s ease}.album-grid .file-card:hover .card-preview img{transform:scale(1.035)}.album-grid .card-info{position:absolute;inset:0;padding:8px;align-items:flex-start;justify-content:flex-end;background:linear-gradient(180deg,rgba(7,10,18,.28),transparent 40%);opacity:0;transition:opacity .18s;pointer-events:none}.album-grid .file-card:hover .card-info,.album-grid .file-card:focus-within .card-info{opacity:1}.album-grid .card-copy{display:none}.album-grid .card-menu{color:#fff;background:rgba(12,17,29,.48);backdrop-filter:blur(8px);pointer-events:auto}.album-grid .card-menu:hover{border-color:rgba(255,255,255,.25);background:rgba(12,17,29,.7)}

/* Immersive previews */
.preview-panel{display:block;background:rgba(8,12,22,.72);backdrop-filter:blur(10px)}.preview-scrim{position:absolute;inset:0;width:100%;height:100%;border:0;background:transparent}.preview-window{position:absolute;inset:24px;display:grid;grid-template-rows:auto minmax(0,1fr) auto;min-width:0;border-radius:18px;background:#fff;box-shadow:0 30px 80px rgba(0,0,0,.35);overflow:hidden;animation:preview-in .2s ease-out}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;padding:10px 16px 10px 20px;border-bottom:1px solid var(--line);z-index:3}.preview-title{min-width:0}.preview-title h2{max-width:min(62vw,720px);margin:3px 0 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px}.preview-type{color:var(--blue);font-size:9px;font-weight:800;letter-spacing:.16em}.preview-actions{display:flex;gap:5px}.preview-actions .icon-button{color:inherit;text-decoration:none}.preview-stage{width:100%;height:100%;min-height:0;margin:0;border-radius:0;background:#eef1f5}.preview-stage iframe{width:100%;height:100%;border:0;background:#fff}.preview-stage video{width:100%;height:100%;background:#06080d;object-fit:contain}.preview-stage audio{width:min(620px,80%)}.preview-window>.file-details{margin:0;padding:14px 20px;max-height:150px;overflow:auto;background:#fff}.preview-nav{position:absolute;top:50%;z-index:5;width:46px;height:46px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.18);border-radius:50%;color:#fff;background:rgba(8,12,20,.4);backdrop-filter:blur(8px);cursor:pointer;transform:translateY(-50%);transition:.18s}.preview-nav:hover{background:rgba(8,12,20,.72);transform:translateY(-50%) scale(1.05)}.preview-nav.prev{left:24px}.preview-nav.next{right:24px}.image-mode .preview-window{inset:0;border-radius:0;background:transparent;box-shadow:none}.image-mode .preview-toolbar{position:absolute;left:0;right:0;top:0;color:#fff;border:0;background:linear-gradient(180deg,rgba(0,0,0,.68),transparent)}.image-mode .preview-type{color:#aebdff}.image-mode .preview-actions .icon-button:hover{border-color:rgba(255,255,255,.18);background:rgba(255,255,255,.12)}.image-mode .preview-stage{background:transparent;padding:72px 70px 30px}.image-mode .preview-stage img{width:100%;height:100%;max-height:none;object-fit:contain;filter:drop-shadow(0 16px 45px rgba(0,0,0,.35))}.image-mode .file-details,.document-mode .file-details,.media-mode .file-details{display:none}.document-mode .preview-stage{background:#d9dde4}.media-mode .preview-stage{display:grid;place-items:center;background:#0b0e15}.file-mode .preview-stage{min-height:280px}.file-mode .preview-stage .file-icon{transform:scale(1.55)}@keyframes preview-in{from{opacity:0;transform:scale(.985)}}
@media(max-width:680px){.album-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:3px}.album-grid .file-card{border-radius:3px}.preview-window{inset:8px;border-radius:13px}.image-mode .preview-stage{padding:66px 8px 16px}.preview-nav{width:40px;height:40px}.preview-nav.prev{left:8px}.preview-nav.next{right:8px}.preview-title h2{max-width:55vw}.preview-window>.file-details{grid-template-columns:78px 1fr}}
@media(hover:none){.album-grid .card-info{opacity:1;background:none}.album-grid .card-menu{background:rgba(12,17,29,.5)}}

/* Generated document and archive previews */
.preview-message{min-height:240px;display:grid;place-items:center;align-content:center;gap:10px;padding:32px;text-align:center;color:var(--muted)}.preview-message svg{width:40px;height:40px;color:#8996ae}.preview-message strong{color:var(--ink);font-size:17px}.preview-message p{max-width:460px;margin:0;font-size:13px;line-height:1.6}.preview-spinner{width:34px;height:34px;border:3px solid #d9deea;border-top-color:var(--blue);border-radius:50%;animation:preview-spin .8s linear infinite}@keyframes preview-spin{to{transform:rotate(360deg)}}.archive-mode .preview-stage{display:block;overflow:auto;background:#f3f5f8}.archive-mode .file-details{display:none}.archive-browser{width:min(920px,calc(100% - 36px));margin:24px auto;border:1px solid var(--line);border-radius:15px;background:#fff;overflow:hidden}.archive-summary{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 20px;border-bottom:1px solid var(--line);color:var(--muted);font-size:12px}.archive-summary strong{display:block;color:var(--ink);font-size:15px}.archive-summary div span{display:block;margin-top:4px}.archive-list{display:grid}.archive-row{width:100%;min-height:48px;display:grid;grid-template-columns:36px minmax(0,1fr) 90px;align-items:center;gap:10px;padding:7px 16px;border:0;border-bottom:1px solid var(--line);background:#fff;text-align:left;font-size:13px}.archive-row:last-child{border-bottom:0}.archive-row:not(.directory){cursor:pointer}.archive-row:not(.directory):hover{background:#f7f9fc}.archive-kind{width:30px;height:30px;display:grid;place-items:center;border-radius:7px;color:#6179dc;background:#edf1ff;font-size:8px;font-weight:800}.archive-kind svg{width:16px;height:16px}.archive-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.archive-size{text-align:right;color:var(--muted);font-size:12px}.archive-empty{padding:60px 20px;text-align:center;color:var(--muted);font-size:13px}.archive-entry-view{height:100%;display:grid;grid-template-rows:auto minmax(0,1fr)}.archive-entry-bar{min-height:56px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:7px 12px;border-bottom:1px solid var(--line);background:#fff}.archive-entry-bar>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.archive-entry-body{min-height:0;display:grid;place-items:center;overflow:auto}.archive-entry-body iframe{width:100%;height:100%;border:0;background:#fff}.archive-entry-body img,.archive-entry-body video{max-width:100%;max-height:100%;object-fit:contain}.archive-entry-body audio{width:min(620px,80%)}
@media(max-width:680px){.archive-browser{width:calc(100% - 16px);margin:8px auto}.archive-summary{padding:13px}.archive-summary>span{display:none}.archive-row{grid-template-columns:32px minmax(0,1fr) 62px;padding:6px 10px}.archive-entry-bar{grid-template-columns:auto minmax(0,1fr)}.archive-entry-bar>a{grid-column:1/-1}.archive-entry-bar .button{min-height:36px;padding:0 10px;font-size:12px}}