:root{
  --bg:#f4f6fb; --surface:#ffffff; --surface2:#f8fafd;
  --border:#e4e9f2; --border2:#d4dce9;
  --text:#182236; --muted:#68738a; --faint:#9aa4b8;
  --accent:#4f7cff; --accent2:#22c8ee; --accent-soft:#eef3ff;
  --danger:#e5484d; --danger-soft:#fdebec; --ok:#18a058; --ok-soft:#e6f6ee;
  --warn:#d97706; --warn-soft:#fdf3e3;
  --shadow:0 1px 2px rgba(20,30,60,.04),0 8px 24px -12px rgba(20,30,60,.12);
  --shadow-lg:0 24px 64px -24px rgba(20,30,60,.28);
  --radius:12px;
  --grad:linear-gradient(135deg,#4f7cff 0%,#6aa0ff 55%,#22c8ee 130%);
}
[data-theme="dark"]{
  --bg:#0a0e16; --surface:#101624; --surface2:#151d2e;
  --border:#1e2839; --border2:#2a3650;
  --text:#e7ecf6; --muted:#8b96ad; --faint:#5c6880;
  --accent:#5d86ff; --accent2:#2dd4f0; --accent-soft:#17233d;
  --danger:#f2555a; --danger-soft:#3a1a1e; --ok:#2fbf71; --ok-soft:#12291d;
  --warn:#f0a020; --warn-soft:#33270f;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px -12px rgba(0,0,0,.5);
  --shadow-lg:0 24px 64px -24px rgba(0,0,0,.7);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"Inter","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--text);font-size:14px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:ui-monospace,"SF Mono","Cascadia Code",Consolas,monospace}
a{color:var(--accent);text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border2);border-radius:8px;padding:8px 12px;outline:none;transition:border .15s,box-shadow .15s;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}
::placeholder{color:var(--faint)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:5px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:8px;font-weight:500;font-size:13.5px;border:1px solid transparent;transition:all .15s;white-space:nowrap;user-select:none}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 2px 10px -2px color-mix(in srgb,var(--accent) 55%,transparent)}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn-ghost{border-color:var(--border2);background:var(--surface)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.btn-danger{background:var(--danger-soft);color:var(--danger)}
.btn-danger:hover{background:var(--danger);color:#fff}
.btn-sm{padding:5px 10px;font-size:12.5px;border-radius:7px}
.btn-icon{padding:7px;border-radius:8px;color:var(--muted)}
.btn-icon:hover{background:var(--accent-soft);color:var(--accent)}
.btn-icon svg{width:17px;height:17px}
.btn:disabled{opacity:.55;pointer-events:none}

/* ---------- auth pages ---------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;position:relative;overflow:hidden;
  background:radial-gradient(900px 500px at 15% -10%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 60%),
             radial-gradient(800px 500px at 110% 110%,color-mix(in srgb,var(--accent2) 12%,transparent),transparent 60%),var(--bg)}
.auth-wrap::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);background-size:44px 44px;opacity:.35;mask-image:radial-gradient(700px 500px at 50% 40%,#000,transparent)}
.auth-card{position:relative;width:400px;max-width:100%;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:36px;box-shadow:var(--shadow-lg)}
.auth-logo{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.auth-logo .logo-mark{width:38px;height:38px;border-radius:11px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 4px 14px -4px color-mix(in srgb,var(--accent) 70%,transparent)}
.auth-logo .logo-mark svg{width:22px;height:22px}
.auth-logo h1{font-size:20px;font-weight:700;letter-spacing:-.02em}
.auth-sub{color:var(--muted);font-size:13px;margin-bottom:26px}
.auth-card .field{margin-bottom:14px}
.auth-card label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;font-weight:500}
.auth-card .btn-primary{width:100%;justify-content:center;padding:10px;margin-top:8px}
.auth-switch{text-align:center;margin-top:18px;font-size:13px;color:var(--muted)}
.auth-switch a{cursor:pointer;font-weight:500}
.auth-err{background:var(--danger-soft);color:var(--danger);border-radius:8px;padding:8px 12px;font-size:12.5px;margin-bottom:14px;display:none}
.auth-err.show{display:block}
.auth-foot{position:absolute;bottom:18px;color:var(--faint);font-size:12px;letter-spacing:.04em}

/* ---------- layout ---------- */
.layout{display:flex;height:100vh}
.sidebar{width:232px;flex:none;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:18px 14px}
.side-logo{display:flex;align-items:center;gap:9px;padding:2px 8px 18px}
.side-logo .logo-mark{width:30px;height:30px;border-radius:9px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff}
.side-logo .logo-mark svg{width:17px;height:17px}
.side-logo b{font-size:15.5px;letter-spacing:-.01em}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:9px;color:var(--muted);font-weight:500;font-size:13.5px;cursor:pointer;transition:all .13s;margin-bottom:2px}
.nav-item svg{width:17px;height:17px}
.nav-item:hover{background:var(--surface2);color:var(--text)}
.nav-item.active{background:var(--accent-soft);color:var(--accent)}
.nav-sep{height:1px;background:var(--border);margin:12px 6px}
.nav-label{font-size:11px;color:var(--faint);text-transform:uppercase;letter-spacing:.08em;padding:0 12px;margin-bottom:6px;font-weight:600}
.side-quota{margin-top:auto;padding:14px 10px 4px}
.quota-bar{height:5px;border-radius:3px;background:var(--surface2);border:1px solid var(--border);overflow:hidden;margin:8px 0 6px}
.quota-bar i{display:block;height:100%;background:var(--grad);border-radius:3px;transition:width .4s}
.quota-text{font-size:11.5px;color:var(--muted)}
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{height:60px;flex:none;display:flex;align-items:center;gap:12px;padding:0 22px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:blur(10px)}
.search-box{position:relative;width:320px;max-width:40vw}
.search-box svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--faint)}
.search-box input{padding-left:34px;background:var(--surface2);border-color:transparent}
.search-box input:focus{background:var(--surface)}
.topbar .spacer{flex:1}
.user-chip{display:flex;align-items:center;gap:8px;padding:5px 10px 5px 5px;border-radius:99px;border:1px solid var(--border);cursor:pointer;transition:all .15s}
.user-chip:hover{border-color:var(--accent)}
.avatar{width:28px;height:28px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12.5px;font-weight:600;flex:none}
.user-chip span{font-size:13px;font-weight:500;max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.content{flex:1;overflow-y:auto;padding:22px}

/* ---------- toolbar / breadcrumb ---------- */
.page-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.crumbs{display:flex;align-items:center;gap:4px;font-size:14.5px;font-weight:600;flex-wrap:wrap}
.crumbs a{color:var(--muted);cursor:pointer;font-weight:500}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{color:var(--faint);font-weight:400}
.page-head .spacer{flex:1}
.view-toggle{display:flex;border:1px solid var(--border2);border-radius:8px;overflow:hidden}
.view-toggle button{padding:6px 9px;color:var(--muted)}
.view-toggle button svg{width:15px;height:15px;display:block}
.view-toggle button.active{background:var(--accent-soft);color:var(--accent)}
.sel-bar{display:flex;align-items:center;gap:8px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);border-radius:10px;padding:7px 12px;margin-bottom:14px;font-size:13px;color:var(--accent)}
.sel-bar .spacer{flex:1}

/* ---------- file list ---------- */
.file-table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.file-table th{font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);font-weight:600;background:var(--surface2)}
.file-table td{padding:9px 14px;border-bottom:1px solid var(--border);font-size:13.5px}
.file-table tr:last-child td{border-bottom:none}
.file-table tbody tr{cursor:pointer;transition:background .1s}
.file-table tbody tr:hover{background:var(--surface2)}
.file-table tbody tr.selected{background:var(--accent-soft)}
.fname{display:flex;align-items:center;gap:10px;font-weight:500;min-width:0}
.fname .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ficon{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex:none}
.ficon svg{width:17px;height:17px}
.ficon.dir{background:var(--accent-soft);color:var(--accent)}
.ficon.img{background:#fdeef4;color:#e0447c}
.ficon.vid{background:#f0ecfe;color:#7c5cf0}
.ficon.aud{background:#e8f8f0;color:#16a06a}
.ficon.doc{background:#e8f2fe;color:#2f80e0}
.ficon.zip{background:#fdf3e3;color:#d97706}
.ficon.etc{background:var(--surface2);color:var(--muted)}
[data-theme="dark"] .ficon.img{background:#3a1a28}[data-theme="dark"] .ficon.vid{background:#261d45}
[data-theme="dark"] .ficon.aud{background:#0f2c20}[data-theme="dark"] .ficon.doc{background:#122a45}
[data-theme="dark"] .ficon.zip{background:#33270f}[data-theme="dark"] .ficon.etc{background:var(--surface2)}
.td-muted{color:var(--muted);font-size:12.5px}
.row-actions{display:flex;gap:2px;opacity:0;transition:opacity .12s}
tr:hover .row-actions{opacity:1}
.checkbox{width:16px;height:16px;accent-color:var(--accent);cursor:pointer}

.file-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.grid-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 12px 14px;text-align:center;cursor:pointer;transition:all .15s;position:relative;box-shadow:var(--shadow)}
.grid-item:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:var(--shadow-lg)}
.grid-item.selected{border-color:var(--accent);background:var(--accent-soft)}
.grid-item .ficon{width:52px;height:52px;margin:0 auto 10px;border-radius:13px}
.grid-item .ficon svg{width:26px;height:26px}
.grid-item .nm{font-size:12.5px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.grid-item .sz{font-size:11px;color:var(--faint);margin-top:3px}
.grid-item .gcheck{position:absolute;top:8px;left:8px;opacity:0}
.grid-item:hover .gcheck,.grid-item.selected .gcheck{opacity:1}
.empty{padding:70px 20px;text-align:center;color:var(--faint)}
.empty svg{width:52px;height:52px;margin-bottom:14px;opacity:.5}
.empty p{font-size:13.5px}

/* ---------- dropzone ---------- */
.drop-hint{position:fixed;inset:0;background:color-mix(in srgb,var(--accent) 10%,transparent);border:3px dashed var(--accent);z-index:200;display:flex;align-items:center;justify-content:center;pointer-events:none;border-radius:0}
.drop-hint div{background:var(--surface);padding:20px 36px;border-radius:14px;font-size:16px;font-weight:600;color:var(--accent);box-shadow:var(--shadow-lg)}

/* ---------- upload panel ---------- */
.up-panel{position:fixed;right:22px;bottom:22px;width:340px;background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-lg);z-index:150;overflow:hidden}
.up-head{display:flex;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border);font-weight:600;font-size:13px}
.up-head .spacer{flex:1}
.up-list{max-height:260px;overflow-y:auto}
.up-item{padding:9px 16px;border-bottom:1px solid var(--border)}
.up-item:last-child{border-bottom:none}
.up-item .t{display:flex;font-size:12.5px;gap:8px;align-items:center}
.up-item .t .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.up-item .t .st{color:var(--faint);font-size:11.5px;flex:none}
.up-item .t .st.ok{color:var(--ok)}
.up-item .t .st.err{color:var(--danger)}
.up-bar{height:4px;background:var(--surface2);border-radius:2px;margin-top:6px;overflow:hidden}
.up-bar i{display:block;height:100%;background:var(--grad);transition:width .2s;border-radius:2px}

/* ---------- modal ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(10,14,25,.45);backdrop-filter:blur(3px);z-index:300;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .15s}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg);width:440px;max-width:100%;max-height:88vh;display:flex;flex-direction:column;animation:popIn .18s cubic-bezier(.2,.9,.3,1.2)}
.modal.wide{width:680px}
.modal-head{display:flex;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border);font-weight:600;font-size:15px}
.modal-head .spacer{flex:1}
.modal-body{padding:20px;overflow-y:auto}
.modal-foot{padding:14px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;font-weight:500}
.field .hint{font-size:11.5px;color:var(--faint);margin-top:5px}
@keyframes fadeIn{from{opacity:0}}
@keyframes popIn{from{opacity:0;transform:scale(.94) translateY(8px)}}

/* ---------- preview ---------- */
.preview-body{padding:0;display:flex;align-items:center;justify-content:center;background:#0a0e16;min-height:300px;border-radius:0 0 16px 16px;overflow:hidden}
.preview-body img{max-width:100%;max-height:76vh;object-fit:contain}
.preview-body video{max-width:100%;max-height:76vh}
.preview-body audio{width:80%;margin:40px 0}
.preview-body iframe{width:100%;height:76vh;border:none;background:#fff}
.preview-body pre{width:100%;max-height:76vh;overflow:auto;padding:20px;color:#dfe7f5;font-size:12.5px;font-family:ui-monospace,Consolas,monospace;text-align:left;white-space:pre-wrap;word-break:break-all}

/* ---------- context menu ---------- */
.ctx-menu{position:fixed;z-index:400;background:var(--surface);border:1px solid var(--border);border-radius:11px;box-shadow:var(--shadow-lg);padding:5px;min-width:170px;animation:popIn .12s}
.ctx-item{display:flex;align-items:center;gap:9px;padding:8px 12px;border-radius:7px;font-size:13px;cursor:pointer;color:var(--text)}
.ctx-item svg{width:15px;height:15px;color:var(--muted)}
.ctx-item:hover{background:var(--accent-soft);color:var(--accent)}
.ctx-item:hover svg{color:var(--accent)}
.ctx-item.danger{color:var(--danger)}
.ctx-item.danger svg{color:var(--danger)}
.ctx-item.danger:hover{background:var(--danger-soft)}
.ctx-sep{height:1px;background:var(--border);margin:4px 8px}

/* ---------- toast ---------- */
#toast-root{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:500;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 18px;font-size:13px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:8px;animation:popIn .2s}
.toast.ok{border-color:color-mix(in srgb,var(--ok) 40%,transparent);color:var(--ok)}
.toast.err{border-color:color-mix(in srgb,var(--danger) 40%,transparent);color:var(--danger)}
.toast svg{width:15px;height:15px}

/* ---------- cards / admin ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:22px}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat-card::after{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.85}
.stat-card .lb{font-size:12px;color:var(--muted);font-weight:500}
.stat-card .vl{font-size:26px;font-weight:700;letter-spacing:-.02em;margin-top:4px;font-family:ui-monospace,Consolas,monospace}
.stat-card .un{font-size:12px;color:var(--faint);font-weight:400;margin-left:3px}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:18px}
.panel-head{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--border);font-weight:600;font-size:14px}
.panel-head .spacer{flex:1}
.panel-body{padding:18px}
.panel-body.flush{padding:0}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:20px}
.tab{padding:9px 16px;font-size:13.5px;font-weight:500;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all .13s}
.tab:hover{color:var(--text)}
.tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.badge{display:inline-flex;align-items:center;padding:2px 9px;border-radius:99px;font-size:11.5px;font-weight:600}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.warn{background:var(--warn-soft);color:var(--warn)}
.badge.err{background:var(--danger-soft);color:var(--danger)}
.badge.info{background:var(--accent-soft);color:var(--accent)}
.badge.mute{background:var(--surface2);color:var(--muted)}
.switch{position:relative;width:38px;height:21px;flex:none;cursor:pointer}
.switch input{opacity:0;width:0;height:0;position:absolute}
.switch i{position:absolute;inset:0;background:var(--border2);border-radius:99px;transition:.2s}
.switch i::after{content:"";position:absolute;width:15px;height:15px;border-radius:50%;background:#fff;top:3px;left:3px;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.switch input:checked+i{background:var(--accent)}
.switch input:checked+i::after{left:20px}
.form-row{display:flex;gap:12px;align-items:center;margin-bottom:14px}
.form-row label{width:110px;flex:none;font-size:13px;color:var(--muted);font-weight:500}
.form-row .inp{flex:1}
table.plain{width:100%;border-collapse:collapse}
table.plain th{font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);text-align:left;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--surface2);font-weight:600}
table.plain td{padding:10px 16px;border-bottom:1px solid var(--border);font-size:13px}
table.plain tr:last-child td{border-bottom:none}
table.plain tbody tr:hover{background:var(--surface2)}

/* ---------- share page ---------- */
.share-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(900px 500px at 15% -10%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 60%),radial-gradient(800px 500px at 110% 110%,color-mix(in srgb,var(--accent2) 12%,transparent),transparent 60%),var(--bg)}
.share-card{width:520px;max-width:100%;background:var(--surface);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-lg);overflow:hidden}
.share-head{padding:26px 28px 18px;border-bottom:1px solid var(--border)}
.share-file{display:flex;align-items:center;gap:14px}
.share-file .ficon{width:48px;height:48px;border-radius:12px}
.share-file .ficon svg{width:24px;height:24px}
.share-file .nm{font-size:16px;font-weight:600;word-break:break-all}
.share-file .mt{font-size:12.5px;color:var(--muted);margin-top:2px}
.share-body{padding:22px 28px 26px}
.share-list{border:1px solid var(--border);border-radius:10px;overflow:hidden;margin-top:14px}
.share-list .si{display:flex;align-items:center;gap:10px;padding:9px 14px;border-bottom:1px solid var(--border);font-size:13px}
.share-list .si:last-child{border-bottom:none}
.share-list .si .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- activation ---------- */
.act-steps{display:flex;gap:8px;margin:18px 0;font-size:12px;color:var(--muted)}
.act-steps span{background:var(--surface2);border:1px solid var(--border);padding:4px 10px;border-radius:99px}
.lic-info{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.lic-info .it{background:var(--surface2);border:1px solid var(--border);border-radius:10px;padding:12px 14px}
.lic-info .it .k{font-size:11.5px;color:var(--faint);margin-bottom:3px}
.lic-info .it .v{font-size:13.5px;font-weight:600;word-break:break-all}

@media (max-width:820px){
  .sidebar{width:64px;padding:14px 8px}
  .side-logo b,.nav-item span,.nav-label,.side-quota{display:none}
  .nav-item{justify-content:center;padding:10px}
  .search-box{width:160px}
  .content{padding:14px}
  .user-chip span{display:none}
}