:root {
  --bg: #fbfbfa;
  --panel: #ffffff;
  --ink: #141414;
  --muted: #6b6b6b;
  --faint: #a1a1a1;
  --line: #ebebe8;
  --hover: #f3f3f1;
  --press: #ececea;
  --folder: #e7e5df;
  --accent: #e5484d;
  --ok: #2f8a57;
  --warn: #b7791f;
  --ring: rgba(20, 20, 20, .16);
  --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 12px 32px rgba(0, 0, 0, .08);
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f10;
    --panel: #151516;
    --ink: #ececec;
    --muted: #9b9b9b;
    --faint: #626262;
    --line: #232325;
    --hover: #1b1b1d;
    --press: #222224;
    --folder: #2b2a28;
    --accent: #ff6369;
    --ok: #4cc38a;
    --warn: #e2a336;
    --ring: rgba(255, 255, 255, .18);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 16px 40px rgba(0, 0, 0, .45);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.45 var(--font);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5;
      stroke-linecap: round; stroke-linejoin: round; }
:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; }
h1 { font-size: 22px; font-weight: 600; letter-spacing: -.015em; margin: 0 0 6px; }
h2 { font-size: 13px; font-weight: 600; margin: 40px 0 10px; }
code { font-family: var(--mono); font-size: 12.5px; }
.muted { color: var(--muted); }
.num { font-variant-numeric: tabular-nums; }

/* ------------------------------------------------------------------ layout */
.app {
  display: grid;
  grid-template-columns: 216px minmax(0, 1fr);
  grid-template-rows: 56px minmax(0, 1fr);
  height: 100%;
}
.top {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.brand { display: flex; align-items: center; gap: 10px; width: 184px; font-weight: 600; letter-spacing: -.01em; }
.brand img { border-radius: 6px; }
.search {
  flex: 1;
  max-width: 420px;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px;
  border-radius: var(--radius);
  background: var(--hover);
  color: var(--faint);
}
.search:focus-within { box-shadow: 0 0 0 2px var(--ring); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; color: var(--ink); }
.search input::placeholder { color: var(--faint); }
.search input::-webkit-search-cancel-button { display: none; }
.sync {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}
.sync:hover { background: var(--hover); color: var(--ink); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--faint); }
.dot.ok { background: var(--ok); }
.dot.busy { background: var(--accent); animation: pulse 1.6s ease-in-out infinite; }
.dot.warn { background: var(--warn); }
@keyframes pulse { 50% { opacity: .35; } }

.side {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 12px;
  border-right: 1px solid var(--line);
  overflow-y: auto;
}
.side a {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 34px;
  padding: 0 10px;
  border-radius: 6px;
  color: var(--muted);
}
.side a:hover { background: var(--hover); color: var(--ink); }
.side a.on { background: var(--hover); color: var(--ink); font-weight: 500; }
.usage { margin-top: auto; padding: 12px 10px 4px; font-size: 12px; color: var(--faint); line-height: 1.6; }

main { overflow-y: auto; padding: 28px 36px 64px; outline: none; }
.page { max-width: 1040px; margin: 0 auto; }

/* ------------------------------------------------------------------ toolbar */
.bar { display: flex; align-items: center; gap: 12px; min-height: 36px; margin-bottom: 14px; }
.crumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 2px; min-width: 0; font-size: 18px;
          font-weight: 600; letter-spacing: -.012em; }
.crumbs a, .crumbs span { padding: 2px 6px; border-radius: 6px; white-space: nowrap; overflow: hidden;
                          text-overflow: ellipsis; max-width: 260px; }
.crumbs a { color: var(--muted); font-weight: 500; }
.crumbs a:hover { background: var(--hover); color: var(--ink); }
.crumbs .sep { color: var(--faint); padding: 0; font-weight: 400; }
.actions { margin-left: auto; display: flex; gap: 8px; }
.lede { color: var(--muted); max-width: 620px; margin: 0 0 28px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 32px;
  padding: 0 14px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--bg);
  font-weight: 500;
  white-space: nowrap;
}
.btn:hover { opacity: .88; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { background: var(--hover); opacity: 1; }
.btn.danger { background: transparent; color: var(--accent); border-color: var(--line); }
.btn.danger:hover { background: var(--hover); opacity: 1; }
.btn.small { height: 28px; padding: 0 10px; font-size: 13px; }
.btn[disabled] { opacity: .4; cursor: default; }
.icon-btn { display: grid; place-items: center; width: 32px; height: 32px; border: 0; border-radius: 6px;
            background: none; color: var(--muted); }
.icon-btn:hover { background: var(--hover); color: var(--ink); }

/* ------------------------------------------------------------------ lists */
.list { border-top: 1px solid var(--line); }
.row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 92px 132px 36px;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 0 4px 0 10px;
  border-bottom: 1px solid var(--line);
  cursor: default;
}
a.row, .row.click { cursor: pointer; }
a.row:hover, .row.click:hover { background: var(--hover); }
.row.head { min-height: 32px; font-size: 12px; color: var(--faint); cursor: default; }
.row.head:hover { background: none; }
.row .size, .row .date { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; font-size: 13px; }
.row.head .size, .row.head .date { color: var(--faint); font-size: 12px; }
.row .more { opacity: 0; }
.row:hover .more, .row .more:focus-visible { opacity: 1; }
.name { display: flex; align-items: center; gap: 10px; min-width: 0; }
.name .label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.name .where { color: var(--faint); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ico { color: var(--muted); }
.ico.folder { fill: var(--folder); color: var(--muted); }
.tag { flex: none; font-size: 11px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px;
       padding: 0 7px; line-height: 18px; }
.tag.busy { color: var(--accent); border-color: currentColor; }
.empty { padding: 72px 0; text-align: center; color: var(--muted); }
.empty b { display: block; color: var(--ink); font-weight: 500; margin-bottom: 4px; }
.rows-simple .row { grid-template-columns: minmax(0, 1fr) 92px 132px auto; }

/* ------------------------------------------------------------------ stats */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line);
         border-bottom: 1px solid var(--line); }
.stat { padding: 18px 20px 18px 0; }
.stat + .stat { padding-left: 20px; border-left: 1px solid var(--line); }
.stat .k { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.stat .v { font-size: 22px; font-weight: 600; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.stat .s { font-size: 12px; color: var(--faint); margin-top: 2px; }
.meter { height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; margin-top: 10px; }
.meter i { display: block; height: 100%; background: var(--ink); border-radius: 2px; transition: width .4s; }
.kv { display: grid; grid-template-columns: 200px minmax(0, 1fr); border-top: 1px solid var(--line); }
.kv > div { padding: 11px 0; border-bottom: 1px solid var(--line); }
.kv > div:nth-child(odd) { color: var(--muted); }

/* ------------------------------------------------------------------ sheet */
.sheet {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(460px, 100%);
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border-left: 1px solid var(--line);
  box-shadow: var(--shadow);
  transform: translateX(104%);
  transition: transform .2s ease;
  z-index: 20;
}
.sheet.open { transform: none; }
.scrim { position: fixed; inset: 0; background: rgba(0, 0, 0, .18); opacity: 0; pointer-events: none;
         transition: opacity .2s; z-index: 15; }
.scrim.open { opacity: 1; pointer-events: auto; }
.sheet-head { display: flex; align-items: center; gap: 12px; padding: 14px 14px 14px 22px;
              border-bottom: 1px solid var(--line); }
.sheet-head h2 { margin: 0; font-size: 15px; font-weight: 600; flex: 1; min-width: 0; overflow: hidden;
                 text-overflow: ellipsis; white-space: nowrap; }
.sheet-body { flex: 1; overflow-y: auto; padding: 20px 22px 32px; }
.preview { display: grid; place-items: center; min-height: 180px; margin-bottom: 20px; border-radius: var(--radius);
           background: var(--hover); overflow: hidden; }
.preview img, .preview video { display: block; max-width: 100%; max-height: 56vh; }
.preview audio { width: calc(100% - 32px); margin: 24px 16px; }
.preview iframe { width: 100%; height: 56vh; border: 0; background: #fff; }
.preview.text { display: block; }
.preview pre { width: 100%; max-height: 56vh; margin: 0; padding: 14px 16px; overflow: auto; font: 12px/1.55 var(--mono);
               white-space: pre-wrap; word-break: break-word; }
.preview .big { width: 44px; height: 44px; stroke-width: 1.2; color: var(--faint); }
.preview .note { color: var(--muted); font-size: 13px; padding: 24px; text-align: center; }
.meta { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 8px 12px; margin: 0 0 22px; font-size: 13px; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; word-break: break-word; }
.sheet-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.toggle { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0;
          border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 20px 0 0; }
.toggle .t { font-weight: 500; }
.toggle .s { color: var(--muted); font-size: 12px; }
.switch { position: relative; width: 36px; height: 20px; border-radius: 999px; border: 0; background: var(--line);
          flex: none; transition: background .15s; }
.switch::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%;
                 background: var(--panel); box-shadow: 0 1px 2px rgba(0, 0, 0, .2); transition: transform .15s; }
.switch[aria-checked="true"] { background: var(--ink); }
.switch[aria-checked="true"]::after { transform: translateX(16px); }
.versions { margin-top: 24px; }
.versions h3 { font-size: 13px; font-weight: 600; margin: 0 0 8px; }
.versions .v { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-top: 1px solid var(--line);
               font-size: 13px; }
.versions .v .when { flex: 1; }
.versions .v .why { color: var(--faint); font-size: 12px; }
.share-url { display: flex; gap: 8px; margin-top: 14px; }
.share-url input { flex: 1; min-width: 0; height: 32px; padding: 0 10px; border: 1px solid var(--line);
                   border-radius: var(--radius); background: var(--bg); font: 12px var(--mono); }
.hint { color: var(--muted); font-size: 12px; margin-top: 8px; }

/* ------------------------------------------------------------------ dialog, toast, tray, drop */
dialog { width: min(400px, calc(100% - 32px)); padding: 0; border: 1px solid var(--line); border-radius: 12px;
         background: var(--panel); color: var(--ink); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(0, 0, 0, .25); }
dialog form { padding: 22px; }
dialog h3 { margin: 0 0 6px; font-size: 15px; font-weight: 600; }
dialog p { margin: 0 0 16px; color: var(--muted); }
dialog p:empty { display: none; }
dialog input { width: 100%; height: 36px; padding: 0 10px; border: 1px solid var(--line); border-radius: var(--radius);
               background: var(--bg); outline: none; margin-bottom: 18px; }
dialog input:focus { box-shadow: 0 0 0 2px var(--ring); }
dialog input[hidden] { display: none; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 16px); max-width: calc(100% - 32px);
         padding: 10px 14px; border-radius: var(--radius); background: var(--ink); color: var(--bg); font-size: 13px;
         opacity: 0; pointer-events: none; transition: opacity .18s, transform .18s; z-index: 40; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }
.tray { position: fixed; right: 20px; bottom: 20px; width: 300px; display: flex; flex-direction: column; gap: 6px;
        z-index: 30; }
.tray .item { padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel);
              box-shadow: var(--shadow); font-size: 12.5px; }
.tray .item .n { display: flex; justify-content: space-between; gap: 8px; }
.tray .item .n span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tray .item .n span:last-child { color: var(--muted); font-variant-numeric: tabular-nums; }
.tray .meter { margin-top: 8px; }
.drop { position: fixed; inset: 0; display: grid; place-items: center; background: rgba(251, 251, 250, .9);
        border: 2px dashed var(--faint); color: var(--muted); font-size: 15px; opacity: 0; pointer-events: none;
        transition: opacity .12s; z-index: 50; }
.drop b { color: var(--ink); font-weight: 600; }
.drop.on { opacity: 1; }
@media (prefers-color-scheme: dark) { .drop { background: rgba(15, 15, 16, .9); } }

/* ------------------------------------------------------------------ sign-in page */
body.signin { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
body.signin main { overflow: visible; padding: 0; max-width: 380px; }
body.signin img { border-radius: 9px; margin-bottom: 18px; }
body.signin p { color: var(--muted); margin: 8px 0; }
body.signin b { color: var(--ink); font-weight: 500; }

/* ------------------------------------------------------------------ small screens */
@media (max-width: 760px) {
  .app { grid-template-columns: minmax(0, 1fr); grid-template-rows: 56px minmax(0, 1fr); }
  .top { padding: 0 16px; gap: 10px; }
  .brand { width: auto; }
  .brand span { display: none; }
  .search { max-width: none; }
  .sync { padding: 0 6px; }
  .sync #sync-text { display: none; }
  .side {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
    flex-direction: row;
    justify-content: space-around;
    gap: 0;
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
    border-right: 0;
    border-top: 1px solid var(--line);
    background: var(--bg);
  }
  .side a { flex-direction: column; gap: 2px; height: auto; padding: 6px 10px; font-size: 11px; background: none !important; }
  .side a svg { width: 20px; height: 20px; }
  .usage { display: none; }
  main { padding: 18px 16px 96px; }
  .bar { flex-wrap: wrap; }
  .crumbs { font-size: 16px; width: 100%; }
  .actions { margin-left: 0; }
  .row { grid-template-columns: minmax(0, 1fr) auto 32px; padding: 6px 0 6px 6px; }
  .row .date, .row.head { display: none; }
  .row .more { opacity: 1; }
  .rows-simple .row { grid-template-columns: minmax(0, 1fr) auto; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
  .kv { grid-template-columns: 130px minmax(0, 1fr); }
  .tray { left: 16px; right: 16px; bottom: 80px; width: auto; }
  .sheet { width: 100%; border-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ------------------------------------------------------------------ context menu */
.ctx-scrim { position: fixed; inset: 0; z-index: 59; }
.ctx-scrim.dim { background: rgba(0, 0, 0, .28); animation: fade .15s ease; }
.ctx {
  position: fixed;
  z-index: 60;
  width: 228px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow);
  animation: pop .12s ease;
  transform-origin: top left;
}
.ctx button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: 6px;
  background: none;
  color: var(--ink);
  font-size: 13px;
  text-align: left;
}
.ctx button svg { width: 16px; height: 16px; color: var(--muted); }
.ctx button .l { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ctx button:hover:not([disabled]), .ctx button:focus-visible { background: var(--hover); outline: none; }
.ctx button[disabled] { color: var(--muted); cursor: default; }
.ctx button.danger, .ctx button.danger svg { color: var(--accent); }
.ctx button .on { width: 16px; height: 16px; }
.ctx button .on svg { color: var(--ink); }
.ctx .sep { height: 1px; margin: 5px 6px; background: var(--line); }
.ctx-title { padding: 6px 12px 12px; margin-bottom: 4px; border-bottom: 1px solid var(--line); }
.ctx-title .t { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ctx-title .s { color: var(--muted); font-size: 12px; margin-top: 1px; }
.ctx.as-sheet {
  left: 0;
  right: 0;
  bottom: 0;
  width: auto;
  padding: 8px 8px calc(10px + env(safe-area-inset-bottom));
  border-radius: 14px 14px 0 0;
  border-bottom: 0;
  animation: rise .2s cubic-bezier(.2, .8, .2, 1);
}
.ctx.as-sheet::before { content: ""; display: block; width: 36px; height: 4px; margin: 2px auto 10px;
                        border-radius: 2px; background: var(--line); }
.ctx.as-sheet button { height: 48px; padding: 0 12px; font-size: 15px; gap: 14px; }
.ctx.as-sheet button svg { width: 19px; height: 19px; }
@keyframes pop { from { opacity: 0; transform: scale(.97); } }
@keyframes rise { from { transform: translateY(100%); } }
@keyframes fade { from { opacity: 0; } }

/* ------------------------------------------------------------------ account */
.avatar {
  display: grid;
  place-items: center;
  flex: none;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--hover);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
}
.avatar:hover { background: var(--press); }
.avatar:empty::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--faint); }

/* ------------------------------------------------------------------ selection (deleted files) */
.cb {
  display: grid;
  place-items: center;
  flex: none;
  width: 18px;
  height: 18px;
  padding: 0;
  border: 1.5px solid var(--faint);
  border-radius: 5px;
  background: var(--panel);
  color: transparent;
}
.cb svg, .cb .ico { width: 14px; height: 14px; stroke-width: 2.2; color: inherit; }
.cb[aria-checked="true"] { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.cb[aria-checked="mixed"] { background: var(--ink); border-color: var(--ink); }
.cb[aria-checked="mixed"]::after { content: ""; width: 8px; height: 2px; border-radius: 1px; background: var(--bg); }
.cb[aria-checked="mixed"] svg { display: none; }
.row.pick.sel, .row.menu-on { background: var(--hover); }
.row.head .name { gap: 14px; }
.row.pick .name { gap: 10px; }
.row.pick .name .cb { margin-right: 4px; }
.selbar {
  position: sticky;
  top: -28px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  margin: 0 -8px;
  padding: 8px;
  background: var(--bg);
}
.selbar .count { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.selbar .actions { margin-left: auto; }
.spacer { min-height: 40vh; }

/* ------------------------------------------------------------------ sign-in form */
body.signin h1 { margin: 0 0 4px; }
body.signin form { margin-top: 24px; }
body.signin label { display: block; margin-bottom: 14px; color: var(--muted); font-size: 13px; }
body.signin input {
  display: block;
  width: 100%;
  height: 40px;
  margin-top: 6px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  font-size: 15px;
  outline: none;
}
body.signin input:focus { border-color: var(--faint); box-shadow: 0 0 0 3px var(--ring); }
body.signin .btn { width: 100%; height: 40px; margin-top: 8px; font-size: 14px; }
body.signin main { width: min(360px, 100%); }
body.signin .err { color: var(--accent); margin: 16px 0 0; }

@media (max-width: 760px) {
  .selbar { top: -18px; flex-wrap: wrap; }
  .row.pick { grid-template-columns: minmax(0, 1fr) auto 32px; }
}
@media (hover: none) {
  .row, .side a { -webkit-touch-callout: none; -webkit-user-select: none; user-select: none; }
}