:root {
  --bg: #f7f7fb;
  --panel: #ffffff;
  --side: #f0eff7;
  --text: #1b1a24;
  --muted: #6b6980;
  --line: #e4e2ee;
  --hover: #efedf8;
  --sel: #e6e0ff;
  --accent: #6d4aff;
  --accent-text: #ffffff;
  --accent-soft: #ece7ff;
  --danger: #d9304f;
  --folder: #8a6dff;
  --shadow: 0 10px 30px rgba(20, 16, 50, .14), 0 2px 6px rgba(20, 16, 50, .08);
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16151d;
    --panel: #1d1c26;
    --side: #121118;
    --text: #ecebf3;
    --muted: #9a98ad;
    --line: #2d2b3a;
    --hover: #262433;
    --sel: #2f2754;
    --accent: #8b6dff;
    --accent-soft: #2a2347;
    --danger: #ff5c7a;
    --folder: #a08bff;
    --shadow: 0 10px 30px rgba(0, 0, 0, .5), 0 2px 6px rgba(0, 0, 0, .3);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
button, input, select { font: inherit; color: inherit; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.sprite { position: absolute; width: 0; height: 0; }
a { color: inherit; text-decoration: none; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--line); background: var(--panel); border-radius: 8px;
  padding: 9px 16px; cursor: pointer; font-weight: 500;
}
.btn:hover { background: var(--hover); }
.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.primary.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 8px;
  border: 0; background: transparent; cursor: pointer; color: var(--text);
}
.icon-btn:hover { background: var(--hover); }
.icon-btn.danger { color: var(--danger); }
.icon-btn.small { width: 28px; height: 28px; }
.icon-btn.small svg { width: 16px; height: 16px; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.logo { width: 28px; height: 28px; border-radius: 8px; background: var(--accent) url("icon.svg") center/cover; }

/* login */
.login { min-height: 100%; display: grid; place-items: center; padding: 24px 16px; }
.login-card {
  width: 100%; max-width: 360px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 16px; padding: 28px; display: grid; gap: 16px; box-shadow: var(--shadow);
}
.login-card .brand { margin-bottom: 8px; }
.login-fields { display: grid; gap: 16px; }
.login-or { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 12.5px; }
.login-or::before, .login-or::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.small { font-size: 12.5px; margin: 0; }

/* security page */
.sec { max-width: 720px; display: grid; gap: 20px; padding-top: 4px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; display: grid; gap: 12px; }
.card h3 { margin: 0; font-size: 15px; }
.card p { margin: 0; }
.card .row { grid-template-columns: 32px minmax(0, 1fr) 40px; border-bottom: 1px solid var(--line); }
.card .row:last-child { border-bottom: 0; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 12.5px; }
.pill.tag { margin-left: 8px; font-size: 11px; padding: 1px 8px; vertical-align: 1px; }
.card .name .label, .card .name .sub { white-space: normal; overflow-wrap: anywhere; }
.pill.warn { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); }
code { font: 12.5px ui-monospace, Menlo, Consolas, monospace; background: var(--hover); padding: 1px 6px; border-radius: 5px; }
label { display: grid; gap: 6px; font-weight: 500; }
input:not([type=checkbox]), select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg);
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

/* layout */
.app { display: flex; height: 100%; height: 100dvh; }
.sidebar {
  width: 248px; flex: none; background: var(--side); display: flex; flex-direction: column;
  padding: 18px 12px calc(12px + env(safe-area-inset-bottom, 0px)); gap: 16px; overflow-y: auto;
}
.sidebar .brand { padding: 0 8px; }
.new-wrap { position: relative; }
.new-btn { width: 100%; padding: 11px; border-radius: 10px; }
.nav-label { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 4px 10px; }
.nav-sep { height: 1px; background: var(--line); margin: 10px 4px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; cursor: pointer;
  border: 0; background: transparent; width: 100%; text-align: left;
}
.nav-item:hover { background: var(--hover); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-item span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.disk { display: grid; gap: 4px; }
.disk .bar { height: 4px; border-radius: 4px; background: var(--line); margin: 0 10px 0 40px; overflow: hidden; }
.disk .bar i { display: block; height: 100%; background: var(--accent); }
.disk .bar.warn i { background: var(--danger); }
.disk small { color: var(--muted); font-size: 11.5px; padding: 0 10px 6px 40px; }
.logout { margin-top: auto; color: var(--muted); }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: 8px; padding: 12px 20px; padding-top: calc(12px + env(safe-area-inset-top, 0px)); }
.search {
  flex: 1; max-width: 640px; display: flex; align-items: center; gap: 8px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 0 12px;
}
.search svg { color: var(--muted); }
.search input { border: 0; background: transparent; padding: 10px 0; }
.search input:focus { outline: 0; }
.search:focus-within { border-color: var(--accent); }
.topbar .icon-btn:last-child { margin-left: auto; }

.toolbar { display: flex; align-items: center; gap: 12px; padding: 4px 20px 10px; min-height: 48px; flex-wrap: wrap; }
.crumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 2px; font-size: 18px; font-weight: 600; min-width: 0; flex: 1; }
.crumbs a, .crumbs span { padding: 4px 8px; border-radius: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 260px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { background: var(--hover); color: var(--text); }
.crumbs .sep { color: var(--muted); padding: 0; }
#btn-up { margin-right: -6px; }
.crumbs a.drop-target { background: var(--accent-soft); color: var(--accent); }
.sel-actions { display: flex; align-items: center; gap: 2px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 3px 4px 3px 12px; }
.sel-actions span { margin-right: 6px; color: var(--muted); white-space: nowrap; }
#mode-actions { padding: 3px; border: 0; background: transparent; gap: 8px; }

.content { flex: 1; overflow-y: auto; padding: 0 20px calc(24px + env(safe-area-inset-bottom, 0px)); position: relative; }

/* list view */
.list { display: flex; flex-direction: column; }
.row {
  display: grid; grid-template-columns: 32px minmax(0, 1fr) 110px 150px 40px; align-items: center; gap: 8px;
  padding: 6px 8px; border-radius: 8px; cursor: default; user-select: none; border-bottom: 1px solid var(--line);
}
.row.head { color: var(--muted); font-size: 12.5px; border-bottom: 1px solid var(--line); border-radius: 0; position: sticky; top: 0; background: var(--bg); z-index: 1; }
.row.head button { border: 0; background: none; cursor: pointer; padding: 4px 0; text-align: left; color: inherit; font-weight: 500; }
.row.head button.on { color: var(--text); }
.row:not(.head):hover { background: var(--hover); }
.row.selected { background: var(--sel) !important; }
.row.drop-target { outline: 2px dashed var(--accent); outline-offset: -2px; }
.row input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--accent); margin: 0 auto; display: block; }
.name { display: flex; align-items: center; gap: 12px; min-width: 0; cursor: pointer; }
.name .label { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.name .sub { display: block; color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.name > div { min-width: 0; }
.ico { width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center; flex: none; background: var(--hover); color: var(--muted); }
.ico.folder { background: transparent; color: var(--folder); }
.ico.folder svg { fill: var(--folder); fill-opacity: .22; width: 26px; height: 26px; }
.ico.image { color: #e0732b; } .ico.video { color: #d9304f; } .ico.audio { color: #1c9a6b; } .ico.doc { color: #2f74d0; } .ico.archive { color: #a07a1a; }
.cell { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.more { opacity: 0; }
.row:hover .more, .row.selected .more { opacity: 1; }

/* grid view */
.list.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; padding-top: 4px; }
.list.grid .row.head { display: none; }
.list.grid .row {
  display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 0; border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; background: var(--panel); position: relative;
}
.list.grid .row > input, .list.grid .row > .cell { display: none; }
.list.grid .row > input:checked, .list.grid .row.selected > input { display: block; position: absolute; top: 10px; left: 10px; z-index: 1; margin: 0; }
.list.grid .row:hover > input { display: block; position: absolute; top: 10px; left: 10px; z-index: 1; margin: 0; }
.list.grid .name { flex-direction: column; align-items: stretch; gap: 0; }
.list.grid .ico { width: 100%; height: auto; aspect-ratio: 4/3; border-radius: 0; }
.list.grid .ico svg { width: 44px; height: 44px; }
.list.grid .ico { position: relative; }
.list.grid .ico img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.list.grid .name > div { padding: 10px 40px 10px 12px; }
.list.grid .more { position: absolute; right: 4px; bottom: 6px; opacity: 1; }

.empty { text-align: center; color: var(--muted); padding: 80px 20px; }
.empty svg { width: 56px; height: 56px; color: var(--folder); stroke-width: 1.2; margin-bottom: 8px; }
.empty b { display: block; color: var(--text); font-size: 16px; margin-bottom: 4px; }
.notice { color: var(--muted); padding: 12px 8px; font-size: 13px; }

/* menus */
.menu {
  position: absolute; z-index: 30; background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  box-shadow: var(--shadow); padding: 6px; min-width: 200px; display: grid;
}
.new-wrap .menu { top: calc(100% + 6px); left: 0; right: 0; }
.menu button { display: flex; align-items: center; gap: 10px; border: 0; background: none; padding: 9px 10px; border-radius: 6px; cursor: pointer; text-align: left; }
.menu button:hover { background: var(--hover); }
.menu button.danger { color: var(--danger); }
.menu hr { border: 0; border-top: 1px solid var(--line); margin: 4px 0; }
.ctx { position: fixed; }

/* dialog */
.dlg { border: 0; border-radius: 14px; padding: 0; width: min(440px, calc(100% - 32px)); background: var(--panel); color: var(--text); box-shadow: var(--shadow); }
.dlg::backdrop { background: rgba(10, 8, 25, .45); }
.dlg form { padding: 22px; display: grid; gap: 16px; }
.dlg h2 { margin: 0; font-size: 18px; overflow-wrap: anywhere; }
.dlg form > * { min-width: 0; }
.dlg p { margin: 0; overflow-wrap: anywhere; }
.dlg .actions { display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.copy-row { display: flex; gap: 8px; }
.copy-row input { flex: 1; min-width: 0; }
.picker { border: 1px solid var(--line); border-radius: 8px; max-height: 300px; overflow-y: auto; }
.picker button { display: flex; align-items: center; gap: 10px; width: 100%; border: 0; background: none; padding: 9px 12px; cursor: pointer; text-align: left; border-bottom: 1px solid var(--line); }
.picker button:hover { background: var(--hover); }
.picker button svg { color: var(--folder); }
.picker .where { padding: 8px 12px; font-size: 12.5px; color: var(--muted); background: var(--bg); position: sticky; top: 0; }

/* uploads panel */
.uploads {
  position: fixed; right: 20px; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); width: min(380px, calc(100% - 32px));
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); z-index: 20; overflow: hidden;
}
.uploads header { display: flex; align-items: center; gap: 4px; padding: 10px 10px 10px 16px; font-weight: 600; border-bottom: 1px solid var(--line); }
.uploads header span { flex: 1; }
.uploads.collapsed .up-list { display: none; }
.uploads.collapsed #up-toggle svg { transform: rotate(180deg); }
.up-list { max-height: 280px; overflow-y: auto; }
.up { padding: 10px 16px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 10px; border-bottom: 1px solid var(--line); font-size: 13px; }
.up .n { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.up .s { color: var(--muted); font-size: 12px; }
.up .p { grid-column: 1 / -1; height: 4px; border-radius: 4px; background: var(--line); overflow: hidden; }
.up .p i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.up.done .p i { background: #1c9a6b; }
.up.err .p i { background: var(--danger); width: 100% !important; }
.up.err .s { color: var(--danger); }

.drop { position: fixed; inset: 0; z-index: 40; background: rgba(109, 74, 255, .12); border: 3px dashed var(--accent); display: grid; place-items: center; pointer-events: none; }
.drop div { background: var(--panel); padding: 18px 26px; border-radius: 12px; box-shadow: var(--shadow); display: flex; gap: 10px; align-items: center; font-weight: 600; }

.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 60;
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 10px; box-shadow: var(--shadow); max-width: calc(100% - 32px);
}
.toast.err { background: var(--danger); color: #fff; }

/* viewer */
.viewer { position: fixed; inset: 0; z-index: 50; background: rgba(8, 7, 14, .94); color: #fff; display: flex; flex-direction: column; }
.viewer header { display: flex; align-items: center; gap: 8px; padding: 10px 12px; padding-top: calc(10px + env(safe-area-inset-top, 0px)); }
.viewer header .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; padding-left: 8px; }
.viewer .icon-btn { color: #fff; }
.viewer .icon-btn:hover { background: rgba(255, 255, 255, .12); }
.viewer .stage { flex: 1; min-height: 0; display: grid; place-items: center; padding: 0 56px 24px; position: relative; }
.viewer .stage > img, .viewer .stage > video { max-width: 100%; max-height: 100%; object-fit: contain; }
.viewer .stage > iframe { width: 100%; height: 100%; border: 0; background: #fff; border-radius: 6px; }
.viewer .stage > pre { width: 100%; height: 100%; margin: 0; overflow: auto; background: #1a1922; color: #e9e8f0; padding: 16px; border-radius: 8px; font: 13px/1.5 ui-monospace, Menlo, Consolas, monospace; white-space: pre-wrap; word-break: break-word; }
.viewer .nav { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border-radius: 50%; background: rgba(255, 255, 255, .1); }
.viewer .nav.prev { left: 6px; } .viewer .nav.next { right: 6px; }
.viewer .nopreview { text-align: center; display: grid; gap: 14px; justify-items: center; }

/* share page */
.share-page { display: grid; place-items: center; min-height: 100%; padding: 24px 16px; }
.share-card { width: 100%; max-width: 560px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 28px; display: grid; gap: 14px; box-shadow: var(--shadow); text-align: center; justify-items: center; }
.share-card h1 { font-size: 20px; margin: 4px 0 0; word-break: break-word; }
.share-card p { margin: 0; }
.share-preview { max-width: 100%; max-height: 60vh; border-radius: 10px; }
.share-card audio { width: 100%; }

.only-mobile { display: none; }
.scrim { position: fixed; inset: 0; background: rgba(10, 8, 25, .4); z-index: 24; }

@media (max-width: 800px) {
  .only-mobile { display: inline-grid; }
  .sidebar { position: fixed; inset: 0 auto 0 0; z-index: 25; transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); padding-top: calc(18px + env(safe-area-inset-top, 0px)); }
  .sidebar.open { transform: none; }
  .topbar { padding-left: 16px; padding-right: 16px; }
  .toolbar, .content { padding-left: 16px; padding-right: 16px; }
  .row { grid-template-columns: 28px minmax(0, 1fr) 40px; }
  .row .cell { display: none; }
  .row.head > :nth-child(3), .row.head > :nth-child(4) { display: none; }
  .name .sub.m { display: block; }
  .more { opacity: 1; }
  .crumbs { font-size: 16px; flex-wrap: nowrap; overflow: hidden; }
  .crumbs span { max-width: 100%; }
  .toolbar { gap: 8px; }
  .dlg form { padding: 18px; }
  .dlg .actions .btn { flex: 1; }
  .uploads { right: 16px; left: 16px; width: auto; }
  .share-card { padding: 22px 18px; }
  .list.grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .viewer .stage { padding: 0 8px 16px; }
  .viewer .nav { display: none; }
  .sel-actions { width: 100%; justify-content: flex-end; flex-wrap: wrap; }
}
@media (min-width: 801px) { .name .sub.m { display: none; } }

/* touch screens: iOS zooms into inputs under 16px, and hover states stick after a tap */
@media (pointer: coarse) {
  input:not([type=checkbox]), select { font-size: 16px; }
  .row input[type=checkbox] { width: 20px; height: 20px; }
  .icon-btn { width: 40px; height: 40px; }
  .icon-btn.small { width: 34px; height: 34px; }
}
@media (hover: none) {
  .list:not(.grid) .row:not(.head):hover, .card .row:hover { background: transparent; }
  .list.grid .row:hover { background: var(--panel); }
  .icon-btn:hover, .menu button:hover, .picker button:hover, .nav-item:not(.active):hover, .crumbs a:hover { background: transparent; }
  .btn:hover { background: var(--panel); }
  .btn.primary:hover { background: var(--accent); filter: none; }
  .row:active:not(.head), .menu button:active, .nav-item:active, .icon-btn:active { background: var(--hover); }
}
.list:not(.grid) .ico img { display: none; }