:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --surface-2: #eff2f0;
  --border: #e0e5e2;
  --text: #1a2220;
  --muted: #66716c;
  --accent: #0f766e;
  --accent-hover: #0c5f58;
  --accent-soft: #e2f3f0;
  --danger: #b42318;
  --danger-soft: #fdecea;
  --warn: #b54708;
  --icon-stroke: #aab4af;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 20, .05), 0 8px 28px rgba(16, 24, 20, .07);
  --shadow-sm: 0 1px 2px rgba(16, 24, 20, .06);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101312;
    --surface: #181c1b;
    --surface-2: #212726;
    --border: #2c3330;
    --text: #e8ecea;
    --muted: #94a09b;
    --accent: #2bb3a3;
    --accent-hover: #3cc8b7;
    --accent-soft: #15332f;
    --danger: #f97066;
    --danger-soft: #3a1d1b;
    --warn: #f79009;
    --icon-stroke: #4b5752;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.4);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; } /* author display rules (e.g. .selbar { display:flex }) must not defeat the hidden attribute */
html, body { margin: 0; }
body {
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select { font: inherit; color: inherit; }
input[type=checkbox] { accent-color: var(--accent); width: 16px; height: 16px; margin: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- buttons & inputs ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); background: var(--surface);
  padding: 7px 14px; border-radius: 9px; cursor: pointer;
  white-space: nowrap; transition: background .12s, border-color .12s, box-shadow .12s;
  box-shadow: var(--shadow-sm);
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { color: var(--danger); }
.btn.danger.solid { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost { border-color: transparent; background: transparent; box-shadow: none; }
.btn.ghost:hover { background: var(--surface-2); }
.btn.small { padding: 5px 11px; font-size: 13px; }
.btn.icon { padding: 5px 8px; }

input[type=text], input[type=password], input[type=number], input[type=search], select {
  width: 100%; padding: 9px 11px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--surface);
  outline: none; transition: border-color .12s, box-shadow .12s;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
label { display: block; font-size: 13px; font-weight: 600; margin: 0 0 5px; color: var(--muted); }
.field { margin-bottom: 14px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; color: var(--text); font-size: 14px; }

/* ---------- layout ---------- */
.center-screen { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.center-screen:has(.login) {
  background:
    radial-gradient(900px 420px at 50% -120px, var(--accent-soft), transparent 70%),
    var(--bg);
}
.spinner { width: 28px; height: 28px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

header.top {
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
@supports (backdrop-filter: blur(1px)) {
  header.top { background: color-mix(in srgb, var(--surface) 82%, transparent); backdrop-filter: saturate(1.5) blur(12px); }
}
header.top .inner {
  max-width: 1180px; margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; gap: 12px; height: 58px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--text); letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--accent), #14b8a6); box-shadow: 0 2px 6px rgba(15, 118, 110, .35);
}
nav.tabs { display: flex; gap: 2px; margin-left: 18px; }
nav.tabs a { padding: 7px 13px; border-radius: 9px; color: var(--muted); font-weight: 500; transition: background .12s, color .12s; }
nav.tabs a:hover { background: var(--surface-2); text-decoration: none; color: var(--text); }
nav.tabs a.active { background: var(--accent-soft); color: var(--accent); }
.spacer { flex: 1; }
.who { color: var(--muted); font-size: 14px; }

main { max-width: 1180px; margin: 0 auto; padding: 24px 16px 120px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.card-pad { padding: 22px; }
h1 { font-size: 24px; margin: 0 0 4px; letter-spacing: -.015em; }
h2 { font-size: 17px; margin: 0 0 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* ---------- login ---------- */
.login { width: 100%; max-width: 380px; }
.login .brand { justify-content: center; margin-bottom: 6px; font-size: 21px; }
.login .brand .logo { width: 38px; height: 38px; border-radius: 11px; }
.login .login-sub { text-align: center; margin: 0 0 22px; color: var(--muted); font-size: 14px; }
.login .card { box-shadow: var(--shadow); padding: 26px; }
.error-box { background: var(--danger-soft); color: var(--danger); padding: 9px 12px; border-radius: 9px; font-size: 14px; margin-bottom: 14px; }
.notice-box { background: var(--accent-soft); color: var(--accent); padding: 10px 12px; border-radius: 9px; font-size: 14px; margin-bottom: 16px; }

/* ---------- files ---------- */
.files-head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 14px; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; font-size: 18px; font-weight: 650; min-width: 0; letter-spacing: -.01em; }
.crumbs a { color: var(--text); padding: 2px 7px; border-radius: 7px; }
.crumbs a:hover { background: var(--surface-2); text-decoration: none; }
.crumbs .sep { color: var(--muted); font-weight: 400; }
.crumbs .current { padding: 2px 7px; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin-left: auto; }

.usage { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; font-size: 13px; color: var(--muted); }
.bar { flex: 1; max-width: 320px; height: 8px; background: var(--surface-2); border-radius: 99px; overflow: hidden; border: 1px solid var(--border); }
.bar > span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), #14b8a6); border-radius: 99px; }
.bar.warn > span { background: var(--warn); }
.bar.full > span { background: var(--danger); }

.selbar {
  display: flex; align-items: center; gap: 8px; padding: 8px 12px; margin-bottom: 10px;
  background: var(--accent-soft); border-radius: 10px; font-size: 14px;
}

/* filter / sort / view strip */
.strip { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; padding: 0 4px; }
.strip .count { color: var(--muted); font-size: 13px; }
.strip .spacer { min-width: 4px; }
input.search {
  width: 230px !important; padding: 7px 11px 7px 33px !important; font-size: 14px;
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a09b' stroke-width='2.2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E") no-repeat 10px center / 16px;
}
.segs { display: inline-flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; background: var(--surface); box-shadow: var(--shadow-sm); }
.seg { border: 0; background: none; padding: 6px 10px; cursor: pointer; color: var(--muted); display: grid; place-items: center; }
.seg + .seg { border-left: 1px solid var(--border); }
.seg:hover { background: var(--surface-2); }
.seg.on { background: var(--accent-soft); color: var(--accent); }
.segs.lang .seg { padding: 5px 9px; font-size: 12px; font-weight: 700; letter-spacing: .03em; }
.login-lang { display: flex; justify-content: center; margin-top: 18px; }

.listbox { overflow: visible; }
.listbox.is-grid { background: transparent; border: 0; box-shadow: none; }

table.list { width: 100%; border-collapse: collapse; }
table.list th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; padding: 11px 12px; border-bottom: 1px solid var(--border); }
table.list th.sortable { cursor: pointer; user-select: none; }
table.list th.sortable:hover, table.list th.sorted { color: var(--text); }
table.list th .arrow { margin-left: 5px; color: var(--accent); }
.listbox table.list thead th { position: sticky; top: 58px; background: var(--surface); z-index: 2; }
.listbox table.list thead th:first-child { border-top-left-radius: var(--radius); }
.listbox table.list thead th:last-child { border-top-right-radius: var(--radius); }
table.list td { padding: 7px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.list tr:last-child td { border-bottom: none; }
table.list tbody tr { transition: background .1s; }
table.list tbody tr:hover { background: var(--surface-2); }
table.list tr.selected { background: var(--accent-soft) !important; }
td.cb, th.cb { width: 40px; padding-right: 0; }
td.num, th.num { text-align: right; white-space: nowrap; color: var(--muted); font-variant-numeric: tabular-nums; }
td.when { white-space: nowrap; color: var(--muted); font-size: 14px; }
td.act { width: 48px; text-align: right; }
.name { display: flex; align-items: center; gap: 12px; min-width: 0; }
.name a, .name span.label { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; font-weight: 500; }
.name a:hover { color: var(--accent); text-decoration: none; }
.ficon { width: 31px; height: 38px; flex: none; display: grid; place-items: center; }
.ficon svg { width: 100%; height: 100%; display: block; }
.ficon .pg { fill: var(--surface); stroke: var(--icon-stroke); }
.ficon .fold { fill: var(--surface-2); stroke: var(--icon-stroke); }
.ficon.big { width: 56px; height: 66px; }
.tag { font-size: 11px; padding: 1px 7px; border-radius: 99px; background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); flex: none; }
.tag.on { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.tag.off { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.tag .ico { display: inline-block; vertical-align: -1px; margin-right: 4px; line-height: 0; }

.empty { padding: 60px 20px; text-align: center; color: var(--muted); }
.empty .big { font-size: 16px; color: var(--text); font-weight: 600; margin-bottom: 4px; }
.empty .empty-ico { width: 64px; height: 64px; margin: 0 auto 12px; opacity: .85; }
.empty .empty-ico svg { width: 100%; height: 100%; }

/* grid view */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(176px, 1fr)); gap: 14px; }
.tile {
  position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 13px;
  overflow: hidden; cursor: pointer; box-shadow: var(--shadow-sm);
  transition: box-shadow .15s, border-color .15s, transform .15s;
}
.tile:hover, .tile:focus-visible { box-shadow: var(--shadow); border-color: var(--accent); transform: translateY(-1px); }
.tile.selected { border-color: var(--accent); background: var(--accent-soft); }
.tthumb { height: 128px; display: grid; place-items: center; background: var(--surface-2); overflow: hidden; }
.tile.selected .tthumb { background: transparent; }
.tthumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.tinfo { padding: 10px 13px 12px; min-width: 0; }
.tname { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tmeta { color: var(--muted); font-size: 12px; margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tcb, .tact { position: absolute; top: 8px; opacity: 0; transition: opacity .12s; }
.tcb { left: 8px; background: var(--surface); border-radius: 6px; padding: 4px; display: grid; box-shadow: var(--shadow-sm); }
.tact { right: 8px; background: var(--surface); box-shadow: var(--shadow-sm); border: 1px solid var(--border); }
.tile:hover .tcb, .tile:hover .tact, .tile:focus-within .tcb, .tile:focus-within .tact, .tile.selected .tcb { opacity: 1; }
@media (hover: none) { .tcb, .tact { opacity: 1; } }

.dropzone {
  position: fixed; inset: 0; background: rgba(15, 118, 110, .12); border: 3px dashed var(--accent);
  display: none; place-items: center; z-index: 50; pointer-events: none;
}
.dropzone.on { display: grid; }
.dropzone div { background: var(--surface); padding: 18px 28px; border-radius: 12px; font-weight: 600; box-shadow: var(--shadow); }

/* ---------- dropdown menu ---------- */
.menu {
  position: fixed; z-index: 70; min-width: 190px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 11px; box-shadow: var(--shadow); padding: 5px;
}
.menu button {
  display: flex; width: 100%; align-items: center; gap: 9px; padding: 8px 10px;
  border: 0; background: none; border-radius: 7px; cursor: pointer; text-align: left; font-size: 14px; white-space: pre;
}
.menu button:hover { background: var(--surface-2); }
.menu button.danger { color: var(--danger); }
.menu hr { border: 0; border-top: 1px solid var(--border); margin: 4px 0; }

/* ---------- modal ---------- */
.overlay {
  position: fixed; inset: 0; background: rgba(10, 14, 12, .5); z-index: 60;
  display: grid; place-items: center; padding: 16px; animation: fade .12s;
}
@supports (backdrop-filter: blur(1px)) { .overlay { backdrop-filter: blur(3px); } }
@keyframes fade { from { opacity: 0; } }
.modal {
  background: var(--surface); border-radius: 14px; box-shadow: var(--shadow); border: 1px solid var(--border);
  width: 100%; max-width: 440px; max-height: calc(100vh - 32px); display: flex; flex-direction: column; overflow: hidden;
}
.modal.md { max-width: 560px; }
.modal.wide { max-width: 900px; }
.modal.xl { max-width: 1180px; }
.modal-head { padding: 14px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 12px; }
.modal-head .ficon { width: 26px; height: 32px; }
.modal-head h3 { margin: 0; font-size: 16px; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.modal-body { padding: 18px 20px; overflow: auto; }
.modal-foot { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.modal-body.flush { padding: 0; }

.preview-body { display: grid; place-items: center; background: var(--surface-2); min-height: 200px; }
.preview-body.fill { display: block; }
.preview-body img, .preview-body video { max-width: 100%; max-height: 75vh; display: block; }
.preview-body audio { width: 90%; margin: 40px 0; }
pre.text { margin: 0; padding: 16px 20px; font: 13px/1.55 var(--mono); white-space: pre-wrap; word-break: break-word; width: 100%; background: var(--surface); }
.doc-frame { display: block; width: 100%; height: min(78vh, 900px); border: 0; background: var(--surface-2); }

/* spreadsheet viewer */
.office-wrap { height: min(76vh, 820px); min-height: 280px; display: flex; flex-direction: column; }
.sheet-scroll { flex: 1; min-height: 0; overflow: auto; background: var(--surface); }
table.sheet { border-collapse: separate; border-spacing: 0; font-size: 13px; font-variant-numeric: tabular-nums; }
table.sheet th, table.sheet td { padding: 4px 10px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); white-space: nowrap; max-width: 340px; overflow: hidden; text-overflow: ellipsis; }
table.sheet td.n { text-align: right; }
table.sheet th.colh { position: sticky; top: 0; z-index: 2; background: var(--surface-2); color: var(--muted); font-weight: 600; font-size: 12px; text-align: center; }
table.sheet th.rn { position: sticky; left: 0; z-index: 1; min-width: 46px; background: var(--surface-2); color: var(--muted); font-weight: 500; font-size: 12px; text-align: right; }
table.sheet thead th.rn { top: 0; z-index: 3; }
table.sheet tbody tr:hover td { background: var(--accent-soft); }
.sheet-foot { display: flex; align-items: center; gap: 14px; border-top: 1px solid var(--border); background: var(--surface-2); padding: 0 10px; min-height: 42px; }
.sheet-tabs { display: flex; gap: 2px; overflow-x: auto; flex: 1; }
.sheet-tab { border: 0; border-bottom: 2px solid transparent; background: none; padding: 11px 14px; cursor: pointer; font-size: 13px; color: var(--muted); white-space: nowrap; }
.sheet-tab:hover { color: var(--text); }
.sheet-tab.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; background: var(--surface); }
.sheet-note { font-size: 12px; color: var(--muted); white-space: nowrap; }

.zip-meta { display: flex; gap: 18px; flex-wrap: wrap; padding: 12px 20px; border-bottom: 1px solid var(--border); font-size: 13px; color: var(--muted); }
.zip-meta b { color: var(--text); font-weight: 600; }
.zip-crumbs { padding: 10px 20px; border-bottom: 1px solid var(--border); font-size: 14px; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.zip-crumbs a { cursor: pointer; }

/* ---------- share dialog ---------- */
.share-list { display: grid; gap: 10px; margin: 0 0 18px; }
.share-row { border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; background: var(--surface-2); }
.share-url { display: flex; gap: 8px; }
.share-url input { flex: 1; min-width: 0; font-family: var(--mono); font-size: 13px; }
.share-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.share-new { border-top: 1px solid var(--border); padding-top: 14px; }
.share-new-row { display: flex; gap: 8px; }
.share-new-row input { flex: 1; min-width: 0; }

/* ---------- uploads panel ---------- */
.uploads {
  position: fixed; right: 16px; bottom: 16px; width: 360px; max-width: calc(100vw - 32px); z-index: 40;
  background: var(--surface); border: 1px solid var(--border); border-radius: 13px; box-shadow: var(--shadow);
  overflow: hidden;
}
.uploads-head { display: flex; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 14px; }
.uploads-list { max-height: 260px; overflow: auto; }
.up { padding: 9px 14px; border-bottom: 1px solid var(--border); font-size: 13px; }
.up:last-child { border-bottom: none; }
.up .row { display: flex; gap: 8px; justify-content: space-between; margin-bottom: 5px; }
.up .fname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.up .st { color: var(--muted); white-space: nowrap; }
.up.err .st { color: var(--danger); }
.up.done .st { color: var(--accent); }
.up .bar { max-width: none; height: 6px; }

/* ---------- admin ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat { padding: 16px 18px; }
.stat .k { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }
.stat .v { font-size: 23px; font-weight: 700; margin-top: 2px; letter-spacing: -.01em; }
.stat .s { font-size: 13px; color: var(--muted); }
.grid-form { display: grid; grid-template-columns: 1.2fr 1.2fr .8fr auto auto; gap: 12px; align-items: end; }
.grid-form .field { margin: 0; }
.usage-cell { min-width: 170px; }
.usage-cell .bar { max-width: none; margin-top: 4px; }

/* ---------- toasts ---------- */
#toasts { position: fixed; top: 70px; left: 50%; transform: translateX(-50%); z-index: 90; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: var(--text); color: var(--bg); padding: 9px 16px; border-radius: 10px; font-size: 14px; box-shadow: var(--shadow); animation: fade .15s; max-width: 90vw; }
.toast.error { background: var(--danger); color: #fff; }

.hide-sm { }
@media (max-width: 720px) {
  .hide-sm { display: none; }
  nav.tabs { margin-left: 4px; }
  .who { display: none; }
  .grid-form { grid-template-columns: 1fr 1fr; }
  .toolbar { margin-left: 0; }
  input.search { width: 100% !important; order: 5; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
  .tthumb { height: 104px; }
  table.list td, table.list th { padding: 8px; }
  .listbox table.list thead th { top: 58px; }
  .overlay { padding: 0; }
  .modal.wide, .modal.xl { max-width: none; height: 100%; max-height: none; border-radius: 0; }
  .office-wrap, .doc-frame { height: calc(100vh - 150px); }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation-duration: .01ms !important; }
}