:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #dde1e6;
  --text: #1c2128;
  --muted: #667080;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --accent-soft: #e3edfd;
  --danger: #cf222e;
  --danger-soft: #fde8ea;
  --ok: #1a7f37;
  --folder: #e0a526;
  --shadow: 0 8px 28px rgba(20, 30, 50, .16);
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a20;
    --surface-2: #1f232b;
    --border: #2d333d;
    --text: #e6e9ee;
    --muted: #9099a8;
    --accent: #4c8dff;
    --accent-text: #ffffff;
    --accent-soft: #1c2b45;
    --danger: #ff6b6b;
    --danger-soft: #3a1c20;
    --ok: #3fb950;
    --folder: #e7b443;
    --shadow: 0 8px 28px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", Meiryo, sans-serif;
  -webkit-text-size-adjust: 100%;
  min-height: 100vh;
}
[hidden] { display: none !important; }
.sprite { position: absolute; }
.i { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8;
     stroke-linecap: round; stroke-linejoin: round; }
.i.big { width: 56px; height: 56px; }
#i-more circle, #i-image circle { fill: currentColor; stroke: none; }

/* ------------------------------------------------ buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 38px; padding: 0 14px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text);
  font: inherit; font-size: 14px; cursor: pointer; text-decoration: none; white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover { background: var(--surface-2); }
.btn:focus-visible, .row:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); }
.btn.danger.solid { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.small { min-height: 30px; padding: 0 10px; font-size: 13px; }
.btn.wide { width: 100%; justify-content: center; }
.btn.icon-only { padding: 0 9px; }
.btn:disabled { opacity: .5; cursor: default; }

/* ------------------------------------------------ login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px 24px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 14px;
}
.login-logo { text-align: center; }
.login-logo img { width: 52px; height: 52px; }
.login h1 { font-size: 20px; margin: 0 0 4px; text-align: center; }
.login label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.login label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); }
.login input[type=password], .login input[type=text], .dlg input[type=text] {
  font: inherit; font-size: 16px; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text); width: 100%;
}
#login-code { letter-spacing: .3em; font-variant-numeric: tabular-nums; }
.error { color: var(--danger); min-height: 1.5em; margin: 0; font-size: 14px; }

/* ------------------------------------------------ top bar */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 12px; padding: 10px 16px;
  padding-top: max(10px, env(safe-area-inset-top));
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; color: var(--text); text-decoration: none; font-weight: 600; }
.brand img { width: 28px; height: 28px; }
.disk { font-size: 12px; color: var(--muted); margin-right: auto; white-space: nowrap; }
.disk .bar { width: 110px; margin-top: 3px; }
.top-actions { display: flex; gap: 8px; }

.pathbar { display: flex; gap: 12px; align-items: center; padding: 10px 16px 4px; flex-wrap: wrap; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; flex: 1 1 320px; min-width: 0; font-size: 15px; }
.crumbs a {
  color: var(--text); text-decoration: none; padding: 4px 8px; border-radius: 6px;
  max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.crumbs a:hover { background: var(--surface-2); }
.crumbs a:last-child { font-weight: 600; }
.crumbs .sep { color: var(--muted); }
.filter {
  font: inherit; font-size: 14px; padding: 7px 10px; border-radius: 8px; flex: 0 1 260px; min-width: 0;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}

.selbar {
  position: sticky; top: 59px; z-index: 15;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin: 8px 16px 0; padding: 8px 12px; border-radius: var(--radius);
  background: var(--accent-soft); border: 1px solid var(--accent);
}
.sel-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-left: auto; }

/* ------------------------------------------------ listing */
.listing {
  margin: 10px 16px 16px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
}
.row {
  display: grid; grid-template-columns: 40px minmax(0, 1fr) 110px 170px 44px; align-items: center;
  min-height: 46px; border-top: 1px solid var(--border); user-select: none; -webkit-user-select: none;
}
.row.head { border-top: 0; background: var(--surface-2); min-height: 38px; font-size: 13px; color: var(--muted); }
.row:not(.head):hover { background: var(--surface-2); }
.row.selected { background: var(--accent-soft) !important; }
.row.drop-target { outline: 2px dashed var(--accent); outline-offset: -3px; background: var(--accent-soft); }
.row.dragging { opacity: .5; }
.cell { padding: 0 8px; min-width: 0; }
.cell.sel { display: flex; justify-content: center; }
.cell.sel input { width: 18px; height: 18px; cursor: pointer; }
.cell.size, .cell.date { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.cell.size { text-align: right; }
.sort { background: none; border: 0; font: inherit; color: inherit; text-align: left; cursor: pointer; height: 38px; }
.sort.size { text-align: right; }
.sort.active { color: var(--text); font-weight: 600; }
.sort.active::after { content: " ▲"; font-size: 10px; }
.sort.active.desc::after { content: " ▼"; }
.name-link {
  display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none;
  overflow: hidden; padding: 10px 0; cursor: pointer;
}
.name-link span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.name-link .i { width: 22px; height: 22px; color: var(--muted); }
.name-link .i.folder { color: var(--folder); fill: color-mix(in srgb, var(--folder) 25%, transparent); }
.row.hidden-file .name-link span { opacity: .6; }
.more-btn { background: none; border: 0; color: var(--muted); width: 36px; height: 36px; border-radius: 8px; cursor: pointer; display: grid; place-items: center; }
.more-btn:hover { background: var(--border); color: var(--text); }
.empty { padding: 48px 16px; text-align: center; color: var(--muted); }
.hint { margin: 0 16px 24px; font-size: 12px; color: var(--muted); }

/* ------------------------------------------------ drop overlay */
.drop-overlay {
  position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; pointer-events: none;
  background: color-mix(in srgb, var(--accent) 14%, transparent); border: 3px dashed var(--accent);
  color: var(--accent); font-size: 18px; font-weight: 600; text-align: center;
}

/* ------------------------------------------------ uploads panel */
.uploads {
  position: fixed; right: 16px; bottom: 16px; z-index: 40; width: min(420px, calc(100vw - 32px));
  max-height: 60vh; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow);
  margin-bottom: env(safe-area-inset-bottom);
}
.uploads header { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.uploads header div { display: flex; gap: 6px; }
.uploads.collapsed ul { display: none; }
.up-total { display: flex; align-items: center; gap: 10px; padding: 8px 12px; font-size: 12px; color: var(--muted); }
.up-total .bar { flex: 1; }
.uploads ul { list-style: none; margin: 0; padding: 0; overflow: auto; }
.uploads li { padding: 8px 12px; border-top: 1px solid var(--border); font-size: 13px; }
.up-line { display: flex; justify-content: space-between; gap: 8px; }
.up-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.up-state { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.uploads li.done .up-state { color: var(--ok); }
.uploads li.error .up-state { color: var(--danger); }
.uploads li .bar { margin-top: 5px; }
.up-x { background: none; border: 0; color: var(--muted); cursor: pointer; padding: 0 4px; font-size: 15px; }
.bar { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.uploads li.done .bar i { background: var(--ok); }
.uploads li.error .bar i { background: var(--danger); }

/* ------------------------------------------------ menu */
.menu {
  position: fixed; z-index: 60; min-width: 190px; padding: 6px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow);
}
.menu button {
  display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 10px; border: 0; border-radius: 6px;
  background: none; color: var(--text); font: inherit; font-size: 14px; text-align: left; cursor: pointer;
}
.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; }

/* ------------------------------------------------ dialogs */
dialog { color: var(--text); }
.dlg {
  width: min(480px, calc(100vw - 32px)); padding: 0; border: 1px solid var(--border);
  border-radius: 14px; background: var(--surface); box-shadow: var(--shadow);
}
.dlg::backdrop, .preview::backdrop { background: rgba(0, 0, 0, .45); }
.dlg form { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.dlg h2 { margin: 0; font-size: 17px; }
#dlg-body { font-size: 14px; overflow-wrap: anywhere; }
#dlg-body p { margin: 0 0 8px; }
.dlg-buttons { display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.dlg .check { display: flex; gap: 8px; align-items: center; margin-top: 10px; }
.picker { border: 1px solid var(--border); border-radius: 8px; max-height: 50vh; overflow: auto; }
.picker .crumbs { padding: 6px; border-bottom: 1px solid var(--border); background: var(--surface-2); }
.picker button.pick {
  display: flex; align-items: center; gap: 8px; width: 100%; padding: 9px 12px; border: 0;
  border-top: 1px solid var(--border); background: none; color: var(--text); font: inherit; text-align: left; cursor: pointer;
}
.picker button.pick:first-of-type { border-top: 0; }
.picker button.pick:hover { background: var(--surface-2); }
.picker button.pick .i { color: var(--folder); }
.trash-list { list-style: none; margin: 0; padding: 0; max-height: 50vh; overflow: auto; border: 1px solid var(--border); border-radius: 8px; }
.trash-list li { display: grid; grid-template-columns: 28px 1fr; gap: 4px 8px; padding: 8px 10px; border-top: 1px solid var(--border); }
.trash-list li:first-child { border-top: 0; }
.trash-list .meta { grid-column: 2; font-size: 12px; color: var(--muted); }

.preview {
  width: 100vw; height: 100vh; max-width: 100vw; max-height: 100vh; margin: 0; padding: 0; border: 0;
  background: rgba(0, 0, 0, .92); color: #fff;
}
.preview[open] { display: flex; flex-direction: column; }
.preview-bar { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 14px; padding-top: max(10px, env(safe-area-inset-top)); }
.preview-bar span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.preview-bar div { display: flex; gap: 8px; }
.quality {
  min-height: 30px; padding: 0 8px; border-radius: 8px; font: inherit; font-size: 13px;
  border: 1px solid #555; background: #222; color: #fff;
}
.preview-status { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); color: #ddd; font-size: 14px; pointer-events: none; }
.preview-body { position: relative; }
.preview-body { flex: 1; min-height: 0; display: grid; place-items: center; padding: 8px; }
.preview-body img, .preview-body video { max-width: 100%; max-height: 100%; object-fit: contain; }
.preview-body audio { width: min(520px, 100%); }

/* ------------------------------------------------ toasts */
.toasts { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); z-index: 70; display: flex; flex-direction: column; gap: 8px; align-items: center; width: calc(100vw - 32px); pointer-events: none; }
.toast { background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; font-size: 14px; box-shadow: var(--shadow); max-width: 560px; overflow-wrap: anywhere; }
.toast.err { background: var(--danger); color: #fff; }

/* ------------------------------------------------ phone */
@media (max-width: 720px) {
  .desktop-only { display: none !important; }
  .topbar { gap: 8px; padding-left: 12px; padding-right: 12px; }
  .brand span, .disk { display: none; }
  .top-actions { margin-left: auto; }
  .btn .lbl { display: none; }
  .top-actions .btn.primary .lbl { display: inline; }
  .btn { padding: 0 11px; }
  .pathbar { padding: 8px 12px 2px; }
  .filter { flex: 1 1 100%; }
  .selbar { margin: 8px 12px 0; top: 57px; }
  .listing { margin: 8px 12px 16px; }
  .row { grid-template-columns: 40px minmax(0, 1fr) 44px; min-height: 54px; }
  .row .cell.size, .row .cell.date { display: none; }
  .row .name-link { flex-wrap: wrap; row-gap: 0; }
  .row .sub { display: block; width: 100%; padding-left: 32px; font-size: 12px; color: var(--muted); margin-top: -2px; }
  .row.head .sort.size, .row.head .sort.date { display: none; }
}
@media (min-width: 721px) { .row .sub { display: none; } }