/**
 * ─────────────────────────────────────────────
 *  SPB Drive — Personal Cloud Drive
 * ─────────────────────────────────────────────
 *  Author  : Simon-Pierre Boucher
 *  Contact : contact@spboucher.ai
 *  File    : src/web/assets/app.css
 *  Purpose : Full UI stylesheet — shell, views, overlays, share pages
 *  License : MIT © Simon-Pierre Boucher
 * ─────────────────────────────────────────────
 */

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.55 var(--font-sans);
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
/* Signature aurora wash — a whisper of the brand at the top of every page. */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(46rem 24rem at 12% -6%, var(--aurora-a), transparent 60%),
    radial-gradient(40rem 22rem at 88% -8%, var(--aurora-b), transparent 60%),
    radial-gradient(30rem 18rem at 55% -12%, var(--aurora-c), transparent 65%);
}
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; letter-spacing: inherit; }
::selection { background: var(--accent-soft); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── Primitives ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  cursor: pointer;
  transition: border-color 150ms var(--ease), background 150ms var(--ease),
    box-shadow 150ms var(--ease), transform 150ms var(--spring);
  white-space: nowrap; user-select: none;
}
.btn:hover { border-color: var(--border-strong); box-shadow: var(--shadow-1); }
.btn:active { transform: scale(0.97); }
.btn.primary {
  background: var(--grad-brand); border-color: transparent; color: #fff; font-weight: 600;
  box-shadow: 0 2px 10px rgba(79, 70, 229, 0.28);
}
.btn.primary:hover { filter: brightness(1.06); box-shadow: 0 4px 16px rgba(79, 70, 229, 0.36); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); background: var(--danger-soft); }
.btn.ghost { background: transparent; border-color: transparent; box-shadow: none; }
.btn.ghost:hover { background: var(--surface-2); border-color: transparent; box-shadow: none; }
.btn.icon { padding: 7px; border-radius: 11px; }
.btn:disabled { opacity: 0.45; cursor: default; pointer-events: none; }
.btn svg { width: 16px; height: 16px; flex: none; }

input[type='text'], input[type='password'], input[type='search'], input[type='number'],
input[type='datetime-local'], select, textarea {
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 7px 10px; font: inherit; width: 100%;
  transition: border-color 150ms var(--ease);
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; }
input[type='range'], input[type='checkbox'], input[type='radio'] { accent-color: var(--accent); }
label.field { display: block; margin-bottom: 12px; }
label.field > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 5px; font-weight: 500; }

.chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; padding: 2px 9px; border-radius: 99px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--muted);
  cursor: pointer; user-select: none;
}
.chip.active { border-color: var(--accent); color: var(--accent-ink); background: var(--accent-soft); }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; }

kbd {
  font: 11px var(--font-mono); background: var(--surface-2);
  border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 5px; padding: 1px 6px;
}
.mono { font-family: var(--font-mono); }
.muted { color: var(--muted); }
.spin { animation: spin 0.9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Login ──────────────────────────────────────────────────── */
.login-wrap { min-height: 100%; display: grid; place-items: center; padding: 24px; }
.login-card {
  width: 372px; max-width: 100%; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 40px 34px; box-shadow: var(--shadow-2);
}
.login-logo {
  width: 56px; height: 56px; border-radius: 18px; margin: 0 auto 18px;
  background: var(--grad-brand);
  display: grid; place-items: center; color: #fff;
  font: 700 19px var(--font-mono); letter-spacing: -0.5px;
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.3);
}
.login-card h1 { font-size: 19px; text-align: center; margin: 0 0 4px; }
.login-card .sub { text-align: center; color: var(--muted); font-size: 13px; margin: 0 0 24px; }
.login-error {
  background: var(--danger-soft); border: 1px solid var(--danger);
  color: var(--danger); border-radius: var(--radius-sm);
  padding: 8px 12px; font-size: 13px; margin-bottom: 14px;
}
.login-remember { display: flex; align-items: center; gap: 8px; margin: 14px 0 18px; font-size: 13px; color: var(--muted); }
.login-card .btn { width: 100%; justify-content: center; padding: 10px; }

/* ── App shell ──────────────────────────────────────────────── */
.shell { display: grid; grid-template-rows: 60px 1fr; height: 100vh; height: 100dvh; }
.topbar {
  display: flex; align-items: center; gap: 14px; padding: 0 16px;
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: relative; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15px; white-space: nowrap; letter-spacing: -0.02em; }
.brand .mark {
  width: 32px; height: 32px; border-radius: 10px;
  background: var(--grad-brand);
  display: grid; place-items: center; color: #fff; font: 700 12px var(--font-mono);
  box-shadow: 0 3px 10px rgba(79, 70, 229, 0.28);
}
.searchbox { flex: 1; max-width: 560px; position: relative; }
.searchbox svg { position: absolute; left: 13px; top: 50%; translate: 0 -50%; width: 15px; height: 15px; color: var(--muted); pointer-events: none; }
.searchbox input {
  padding-left: 36px; background: var(--surface-2); border-radius: 999px;
  border-color: transparent;
}
.searchbox input:focus { background: var(--surface); border-color: var(--accent); box-shadow: var(--shadow-1); }
.topbar .spacer { flex: 1; }

.body { display: grid; grid-template-columns: 248px 1fr; min-height: 0; }
.body.info-open { grid-template-columns: 248px 1fr 320px; }

/* Sidebar */
.sidebar {
  background: transparent; border-right: 1px solid var(--border);
  padding: 14px 10px; overflow-y: auto; display: flex; flex-direction: column; gap: 4px;
}
.sidebar-scrim {
  position: fixed; inset: 0; z-index: 64; background: var(--scrim);
  display: none; -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
}
.new-btn { margin: 0 4px 12px; justify-content: center; font-weight: 600; padding: 10px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 7px 12px;
  border-radius: var(--radius-sm); color: var(--text); cursor: pointer;
  border: none; background: none; width: 100%; text-align: left; font-size: 13.5px;
}
.nav-item svg { width: 16px; height: 16px; color: var(--muted); flex: none; }
.nav-item:hover { background: var(--surface-2); }
.nav-item.active { background: var(--accent-soft); color: var(--accent-ink); font-weight: 600; }
.nav-item.active svg { color: var(--accent-ink); }
.nav-item .count { margin-left: auto; font-size: 11px; color: var(--muted); }
.nav-section { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); padding: 14px 12px 4px; }

.tree { margin: 2px 0; }
.tree-row { display: flex; align-items: center; border-radius: var(--radius-sm); }
.tree-row:hover { background: var(--surface-2); }
.tree-row.active { background: var(--accent-soft); }
.tree-row.drop-target { outline: 2px dashed var(--accent); outline-offset: -2px; }
.tree-toggle {
  width: 22px; height: 26px; display: grid; place-items: center;
  background: none; border: none; cursor: pointer; color: var(--muted); flex: none;
}
.tree-toggle svg { width: 10px; height: 10px; transition: transform 150ms var(--ease); }
.tree-toggle.open svg { transform: rotate(90deg); }
.tree-label {
  flex: 1; display: flex; align-items: center; gap: 7px; padding: 4px 6px 4px 0;
  background: none; border: none; cursor: pointer; color: var(--text);
  font-size: 13px; text-align: left; overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
.tree-label svg { width: 15px; height: 15px; flex: none; }

.storage-meter { margin-top: auto; padding: 14px 12px 6px; border-top: 1px solid var(--border); }
/* 2px surface gaps between stacked segments (mark spec) */
.storage-meter .bar { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; display: flex; gap: 2px; margin: 8px 0 6px; }
.storage-meter .bar i { height: 100%; display: block; border-radius: 2px; }
.storage-meter .legend { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 11px; color: var(--muted); }
.storage-meter .legend .dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; margin-right: 4px; }

/* Main pane */
.main { display: flex; flex-direction: column; min-width: 0; min-height: 0; position: relative; }
.toolbar {
  display: flex; align-items: center; gap: 8px; padding: 10px 18px;
  border-bottom: 1px solid var(--border); min-height: 52px; flex-wrap: wrap;
}
.crumbs { display: flex; align-items: center; gap: 2px; font-size: 13.5px; flex: 1; min-width: 0; overflow: hidden; }
.crumb {
  background: none; border: none; cursor: pointer; color: var(--muted);
  padding: 4px 8px; border-radius: 6px; white-space: nowrap; font-size: 13.5px;
}
.crumb:hover { background: var(--surface-2); color: var(--text); }
.crumb.current { color: var(--text); font-weight: 600; }
.crumb.drop-target { outline: 2px dashed var(--accent); outline-offset: -2px; }
.crumb-sep { color: var(--muted); opacity: 0.5; }

.sel-toolbar { display: flex; align-items: center; gap: 6px; }
.sel-count { font-size: 13px; color: var(--accent-ink); font-weight: 600; margin-right: 6px; }

.content { flex: 1; overflow-y: auto; padding: 14px 18px 80px; position: relative; }

/* Grid view */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--card, 168px), 1fr)); gap: 14px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; cursor: default; position: relative; user-select: none;
  box-shadow: var(--shadow-1);
  transition: border-color 150ms var(--ease), background 150ms var(--ease),
    box-shadow 180ms var(--ease), transform 180ms var(--spring);
}
.card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-2); transform: translateY(-2px); }
.card.selected { border-color: transparent; box-shadow: var(--ring), var(--shadow-1); background: var(--accent-soft); }
.card.drop-target { outline: 2px dashed var(--accent); outline-offset: -2px; }
.card .thumb {
  aspect-ratio: 4/3; display: grid; place-items: center; background: var(--surface-2);
  overflow: hidden; position: relative;
}
.card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.card .thumb svg.type-icon { width: 34%; height: 34%; }
.card .thumb .badge {
  position: absolute; right: 7px; bottom: 7px; background: rgba(0,0,0,0.72); color: #fff;
  font: 500 10.5px var(--font-mono); padding: 1px 6px; border-radius: 5px;
}
.card .meta { padding: 9px 11px; display: flex; align-items: center; gap: 8px; }
.card .meta svg { width: 15px; height: 15px; flex: none; }
.card .meta .name { flex: 1; font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card .star-ind { position: absolute; left: 7px; top: 7px; width: 15px; height: 15px; color: var(--warning); filter: drop-shadow(0 1px 3px rgba(0,0,0,0.6)); }
.card .tag-strip { position: absolute; left: 0; top: 0; bottom: 0; width: 3px; }

/* List view */
.list { display: flex; flex-direction: column; }
.list-header, .row {
  display: grid; grid-template-columns: 30px minmax(200px, 1fr) 90px 110px 150px 140px;
  align-items: center; gap: 10px; padding: 5px 10px; border-radius: var(--radius-sm);
}
.list-header { color: var(--muted); font-size: 11.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; position: sticky; top: 0; background: var(--bg); z-index: 2; }
.list-header button { background: none; border: none; color: inherit; cursor: pointer; font: inherit; text-transform: inherit; letter-spacing: inherit; display: flex; align-items: center; gap: 4px; padding: 4px 0; }
.row { cursor: default; user-select: none; font-size: 13px; }
.row:hover { background: var(--surface); }
.row.selected { background: var(--accent-soft); }
.row.drop-target { outline: 2px dashed var(--accent); outline-offset: -2px; }
.row .name { display: flex; align-items: center; gap: 9px; overflow: hidden; }
.row .name svg { width: 16px; height: 16px; flex: none; }
.row .name span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row .cell { color: var(--muted); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row .rowtags { display: flex; gap: 4px; }
.row .star-cell { color: var(--warning); display: grid; place-items: center; }
.row .star-cell svg { width: 14px; height: 14px; }

/* Inline rename */
.rename-input { font: inherit; padding: 2px 6px !important; width: auto !important; min-width: 120px; }

/* Selection rectangle */
.select-rect { position: absolute; border: 1px solid var(--accent); background: var(--accent-soft); z-index: 5; pointer-events: none; }

/* Empty states */
.empty { display: grid; place-items: center; padding: 70px 20px; text-align: center; color: var(--muted); }
.empty svg { width: 120px; height: 90px; margin-bottom: 18px; opacity: 0.9; }
.empty h3 { color: var(--text); margin: 0 0 6px; font-size: 15px; }
.empty p { margin: 0; font-size: 13px; }

/* Skeletons */
.skeleton { border-radius: var(--radius); background: linear-gradient(100deg, var(--surface) 40%, var(--surface-2) 50%, var(--surface) 60%); background-size: 200% 100%; animation: shimmer 1.4s infinite; height: 150px; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ── Info panel ─────────────────────────────────────────────── */
.info-panel {
  background: var(--surface); border-left: 1px solid var(--border);
  overflow-y: auto; padding: 18px; display: none;
}
.body.info-open .info-panel { display: block; animation: slide-in 180ms var(--ease); }
@keyframes slide-in { from { translate: 24px 0; opacity: 0; } }
.info-thumb { width: 100%; aspect-ratio: 16/10; border-radius: var(--radius); background: var(--surface-2); display: grid; place-items: center; overflow: hidden; margin-bottom: 14px; }
.info-thumb img { width: 100%; height: 100%; object-fit: cover; }
.info-thumb svg { width: 56px; height: 56px; }
.info-panel h3 { font-size: 14.5px; margin: 0 0 12px; word-break: break-word; }
.kv { display: grid; grid-template-columns: 92px 1fr; gap: 6px 10px; font-size: 12.5px; margin-bottom: 16px; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; word-break: break-word; }
.info-section { border-top: 1px solid var(--border); padding-top: 13px; margin-top: 13px; }
.info-section h4 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin: 0 0 9px; }
.tag-editor { display: flex; flex-wrap: wrap; gap: 5px; }

/* ── Context menu ───────────────────────────────────────────── */
.ctx-menu {
  position: fixed; z-index: 80; min-width: 218px;
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-pop); padding: 6px; animation: pop 130ms var(--spring);
}
@keyframes pop { from { opacity: 0; transform: scale(0.96) translateY(3px); } }
/* Mobile: context menu as a bottom sheet */
.ctx-menu.sheet {
  left: 0 !important; right: 0; top: auto !important; bottom: 0;
  min-width: 0; border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 10px 12px calc(14px + env(safe-area-inset-bottom));
  animation: sheet-up 220ms var(--spring);
  max-height: 70vh; overflow-y: auto;
}
.ctx-menu.sheet::before {
  content: ''; display: block; width: 40px; height: 4px; border-radius: 2px;
  background: var(--border-strong); margin: 0 auto 10px;
}
.ctx-menu.sheet .ctx-item { padding: 13px 14px; font-size: 15px; border-radius: var(--radius-sm); }
.ctx-menu.sheet .ctx-item svg { width: 18px; height: 18px; }
@keyframes sheet-up { from { transform: translateY(40%); opacity: 0.4; } }
.ctx-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 7px 11px; border: none; background: none; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 13px; text-align: left; color: var(--text);
}
.ctx-item svg { width: 15px; height: 15px; color: var(--muted); flex: none; }
.ctx-item:hover, .ctx-item.focused { background: var(--accent-soft); }
.ctx-item.danger { color: var(--danger); }
.ctx-item.danger svg { color: var(--danger); }
.ctx-item kbd { margin-left: auto; }
.ctx-sep { height: 1px; background: var(--border); margin: 5px 8px; }
.ctx-colors { display: flex; gap: 6px; padding: 7px 11px; }
.ctx-colors button { width: 18px; height: 18px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; }
.ctx-colors button:hover { border-color: var(--text); }

/* ── Toasts — inverted pills, readable over any content ─────── */
.toasts {
  position: fixed; bottom: calc(20px + env(safe-area-inset-bottom));
  left: 50%; translate: -50% 0; z-index: 95;
  display: flex; flex-direction: column; gap: 8px; align-items: center;
}
.toast {
  display: flex; align-items: center; gap: 12px;
  background: var(--text); color: var(--bg); border: none; border-radius: 999px;
  box-shadow: var(--shadow-pop); padding: 11px 20px; font-size: 13px; font-weight: 500;
  animation: toast-in 240ms var(--spring);
}
@keyframes toast-in { from { translate: 0 16px; opacity: 0; } }
.toast button { background: none; border: none; color: var(--accent-2); font-weight: 700; cursor: pointer; padding: 0; }
.toast.error { box-shadow: 0 0 0 2px var(--danger), var(--shadow-pop); }

/* ── Modals ─────────────────────────────────────────────────── */
.modal-scrim {
  position: fixed; inset: 0; background: var(--scrim); z-index: 70;
  display: grid; place-items: center; animation: fade 150ms var(--ease);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
@keyframes fade { from { opacity: 0; } }
.modal {
  width: 448px; max-width: calc(100vw - 32px); max-height: 86vh; overflow-y: auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-pop); padding: 24px; animation: pop 160ms var(--spring);
}
.modal h2 { font-size: 16px; margin: 0 0 16px; letter-spacing: -0.02em; }
.modal .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }
.modal.wide { width: 620px; }

/* Folder tree picker */
.picker-tree { max-height: 300px; overflow-y: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 6px; }

/* Share modal specifics */
.share-url { display: flex; gap: 8px; margin: 12px 0; }
.share-url input { font-family: var(--font-mono); font-size: 12px; }
.share-qr { display: grid; place-items: center; padding: 10px; }
.share-qr img { border-radius: var(--radius-sm); background: #fff; padding: 8px; }

/* ── Upload panel ───────────────────────────────────────────── */
.upload-panel {
  position: fixed; right: 18px; bottom: calc(18px + env(safe-area-inset-bottom));
  width: 360px; z-index: 60;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-pop); overflow: hidden; display: none;
}
.upload-panel.open { display: block; animation: toast-in 200ms var(--ease); }
.upload-head { display: flex; align-items: center; gap: 10px; padding: 11px 14px; background: var(--surface-2); font-weight: 600; font-size: 13px; }
.upload-head .agg { color: var(--muted); font-weight: 400; font-size: 12px; }
.upload-head button { margin-left: auto; }
.upload-list { max-height: 300px; overflow-y: auto; }
.upload-panel.min .upload-list { display: none; }
.upload-item { display: flex; align-items: center; gap: 10px; padding: 9px 14px; border-top: 1px solid var(--border); font-size: 12.5px; }
.upload-item .fname { flex: 1; min-width: 0; }
.upload-item .fname .n { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.upload-item .fname .s { color: var(--muted); font-size: 11px; }
.upload-item .prog { height: 4px; border-radius: 2px; background: var(--surface-2); overflow: hidden; margin-top: 4px; }
.upload-item .prog i { display: block; height: 100%; background: var(--accent); border-radius: 2px; transition: width 200ms linear; }
.upload-item.done .prog i { background: var(--accent-2); }
.upload-item.err .prog i { background: var(--danger); }
.upload-item .act { display: flex; gap: 2px; }

/* Drop overlay */
.drop-overlay {
  position: fixed; inset: 0; z-index: 90; background: var(--scrim);
  display: none; place-items: center; pointer-events: none;
}
.drop-overlay.active { display: grid; }
.drop-overlay .inner {
  border: 2px dashed var(--accent); border-radius: 16px; padding: 60px 90px;
  color: var(--accent); font-size: 17px; font-weight: 600; background: var(--accent-soft);
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.drop-overlay svg { width: 44px; height: 44px; }

/* ── Preview overlay ────────────────────────────────────────── */
.preview-overlay { position: fixed; inset: 0; z-index: 85; background: var(--scrim-heavy); display: flex; flex-direction: column; animation: fade 150ms var(--ease); }
.preview-head { display: flex; align-items: center; gap: 12px; padding: 12px 18px; color: #fff; }
.preview-head .title { font-weight: 600; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.preview-head .size { color: rgba(255,255,255,0.6); font-size: 12px; white-space: nowrap; }
.preview-head .p-actions { margin-left: auto; display: flex; gap: 4px; }
.preview-head .btn { background: rgba(255,255,255,0.08); border-color: transparent; color: #fff; }
.preview-head .btn:hover { background: rgba(255,255,255,0.16); }
.preview-body { flex: 1; min-height: 0; display: grid; place-items: center; position: relative; padding: 0 64px 24px; }
.preview-stage { max-width: 100%; max-height: 100%; display: grid; place-items: center; }
.preview-nav {
  position: absolute; top: 50%; translate: 0 -50%; z-index: 3;
  width: 44px; height: 44px; border-radius: 50%; border: none; cursor: pointer;
  background: rgba(255,255,255,0.1); color: #fff; display: grid; place-items: center;
}
.preview-nav:hover { background: rgba(255,255,255,0.22); }
.preview-nav.prev { left: 12px; } .preview-nav.next { right: 12px; }
.preview-nav svg { width: 20px; height: 20px; }
.preview-count { position: absolute; bottom: 10px; left: 50%; translate: -50% 0; color: rgba(255,255,255,0.55); font-size: 12px; }

.pv-img-wrap { overflow: hidden; width: 100%; height: 100%; display: grid; place-items: center; cursor: grab; }
.pv-img-wrap img { max-width: 100%; max-height: 100%; transition: transform 120ms var(--ease); transform-origin: center; }
.pv-toolbar {
  position: absolute; bottom: 18px; left: 50%; translate: -50% 0; z-index: 4;
  display: flex; gap: 4px; background: rgba(10,13,20,0.85); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 99px; padding: 5px 8px;
}
.pv-toolbar .btn { background: none; border: none; color: #fff; padding: 6px 9px; }
.pv-toolbar .btn:hover { background: rgba(255,255,255,0.12); }
.pv-toolbar .zoom-label { color: rgba(255,255,255,0.65); font-size: 12px; align-self: center; min-width: 42px; text-align: center; }

video.pv-video { max-width: 100%; max-height: 100%; border-radius: var(--radius); background: #000; outline: none; }

.pv-panel {
  width: min(920px, 100%); height: 100%; background: var(--surface);
  border-radius: var(--radius); border: 1px solid var(--border);
  overflow: hidden; display: flex; flex-direction: column;
}
.pv-panel .pv-scroll { flex: 1; overflow: auto; padding: 22px 28px; }
.pv-panel .pv-toolstrip { display: flex; align-items: center; gap: 6px; padding: 8px 14px; border-bottom: 1px solid var(--border); font-size: 12px; color: var(--muted); flex-wrap: wrap; }

/* Code preview */
.pv-code pre { margin: 0; font: 12.5px/1.6 var(--font-mono); }
.pv-code .shiki { background: transparent !important; padding: 0; }
.pv-code.linenums code { counter-reset: ln; }
.pv-code.linenums .line::before {
  counter-increment: ln; content: counter(ln);
  display: inline-block; width: 3.2em; margin-right: 1.2em; text-align: right;
  color: var(--muted); opacity: 0.55; user-select: none;
}
.pv-code.wrap pre { white-space: pre-wrap; word-break: break-all; }

/* Markdown preview */
.md-body { font-size: 14.5px; line-height: 1.65; max-width: 780px; margin: 0 auto; }
.md-body h1, .md-body h2 { border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.md-body h1 a, .md-body h2 a, .md-body h3 a, .md-body h4 a { color: inherit; }
.md-body pre.code-fence, .md-body pre.mermaid-block { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 13px 16px; overflow-x: auto; font: 12.5px/1.6 var(--font-mono); }
.md-body code { font-family: var(--font-mono); font-size: 0.9em; background: var(--surface-2); border-radius: 4px; padding: 1px 5px; }
.md-body pre code { background: none; padding: 0; }
.md-body table { border-collapse: collapse; width: 100%; margin: 14px 0; }
.md-body th, .md-body td { border: 1px solid var(--border); padding: 7px 11px; text-align: left; }
.md-body th { background: var(--surface-2); }
.md-body img { max-width: 100%; }
.md-body blockquote { border-left: 3px solid var(--accent); margin: 14px 0; padding: 2px 16px; color: var(--muted); }
.md-body .task-list-item { list-style: none; }
.md-body .task-list-item input { margin-right: 7px; }

/* CSV table */
.csv-wrap { overflow: auto; height: 100%; }
.csv-table { border-collapse: collapse; font: 12px var(--font-mono); min-width: 100%; }
.csv-table th {
  position: sticky; top: 0; background: var(--surface-2); z-index: 2;
  border: 1px solid var(--border); padding: 6px 10px; text-align: left; cursor: pointer; white-space: nowrap;
}
.csv-table th:hover { color: var(--accent); }
.csv-table td { border: 1px solid var(--border); padding: 4px 10px; white-space: nowrap; max-width: 340px; overflow: hidden; text-overflow: ellipsis; }
.csv-table tr:nth-child(even) td { background: var(--surface); }

/* JSON tree */
.json-tree { font: 12.5px/1.7 var(--font-mono); }
.json-tree details { padding-left: 18px; }
.json-tree summary { cursor: pointer; list-style: none; margin-left: -18px; }
.json-tree summary::before { content: '▸'; display: inline-block; width: 14px; color: var(--muted); }
.json-tree details[open] > summary::before { content: '▾'; }
.json-key { color: var(--accent); }
.json-str { color: var(--accent-2); }
.json-num { color: var(--warning); }
.json-bool { color: #b48cff; }
.json-null { color: var(--muted); }

/* Archive browser */
.arc-list { font-size: 13px; }
.arc-row { display: flex; align-items: center; gap: 10px; padding: 6px 10px; border-radius: var(--radius-sm); cursor: pointer; }
.arc-row:hover { background: var(--surface-2); }
.arc-row svg { width: 15px; height: 15px; color: var(--muted); flex: none; }
.arc-row .sz { margin-left: auto; color: var(--muted); font-size: 12px; font-family: var(--font-mono); }

/* Audio player */
.pv-audio { width: min(680px, 92vw); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.pv-audio .art { width: 88px; height: 88px; border-radius: var(--radius-sm); background: var(--surface-2); display: grid; place-items: center; overflow: hidden; }
.pv-audio .art img { width: 100%; height: 100%; object-fit: cover; }
.pv-audio .art svg { width: 34px; height: 34px; color: var(--muted); }
.pv-audio .top { display: flex; gap: 18px; align-items: center; margin-bottom: 18px; }
.pv-audio .tt { min-width: 0; }
.pv-audio .tt .t { font-weight: 600; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pv-audio .tt .a { color: var(--muted); font-size: 12.5px; }
#waveform { margin: 6px 0 12px; }
.audio-controls { display: flex; align-items: center; gap: 8px; }
.audio-controls .time { font: 12px var(--font-mono); color: var(--muted); margin-left: auto; }

/* PDF viewer */
.pv-pdf { width: 100%; height: 100%; display: flex; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; }
.pdf-rail { width: 130px; overflow-y: auto; border-right: 1px solid var(--border); padding: 10px; display: flex; flex-direction: column; gap: 10px; background: var(--surface-2); flex: none; }
.pdf-rail canvas { width: 100%; border-radius: 4px; cursor: pointer; border: 2px solid transparent; display: block; }
.pdf-rail .cur canvas { border-color: var(--accent); }
.pdf-rail .pn { text-align: center; font-size: 10.5px; color: var(--muted); margin-top: 3px; }
.pdf-main { flex: 1; overflow: auto; display: flex; flex-direction: column; align-items: center; gap: 18px; padding: 20px; }
.pdf-page { position: relative; box-shadow: 0 3px 16px rgba(0,0,0,0.4); }
.pdf-page canvas { display: block; }
.pdf-page .textLayer {
  position: absolute; inset: 0; overflow: hidden; line-height: 1;
  opacity: 1; forced-color-adjust: none; transform-origin: 0 0; z-index: 1;
}
.pdf-page .textLayer span, .pdf-page .textLayer br { color: transparent; position: absolute; white-space: pre; cursor: text; transform-origin: 0 0; }
.pdf-page .textLayer ::selection { background: rgba(79, 140, 255, 0.4); }
.pdf-page .textLayer .hl { background: rgba(255, 209, 102, 0.5); color: transparent; border-radius: 2px; }

/* Font specimen */
.font-specimen h2 { font-size: 34px; margin: 4px 0 20px; font-weight: 400; }
.font-specimen .alpha { font-size: 21px; word-break: break-all; color: var(--muted); margin-bottom: 20px; }
.font-specimen .pangram { border-top: 1px solid var(--border); padding-top: 16px; }

/* Fallback card */
.fallback-card { text-align: center; padding: 46px 40px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); max-width: 440px; }
.fallback-card svg { width: 64px; height: 64px; margin-bottom: 14px; }
.fallback-card h3 { margin: 0 0 4px; word-break: break-all; }
.fallback-card .fm { color: var(--muted); font-size: 12.5px; margin-bottom: 6px; }
.fallback-card .sha { font: 10.5px var(--font-mono); color: var(--muted); word-break: break-all; opacity: 0.7; margin-bottom: 18px; }

/* Processing state */
.pv-processing { text-align: center; color: #fff; }
.pv-processing .bar { width: 220px; height: 4px; border-radius: 2px; background: rgba(255,255,255,0.15); overflow: hidden; margin: 16px auto 0; }
.pv-processing .bar i { display: block; height: 100%; width: 40%; background: var(--accent); border-radius: 2px; animation: indeterminate 1.2s infinite var(--ease); }
@keyframes indeterminate { from { margin-left: -40%; } to { margin-left: 100%; } }

/* ── Share pages (public) ───────────────────────────────────── */
.share-page { min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }
.share-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: calc(14px + env(safe-area-inset-top)) 22px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 5;
}
.share-main { flex: 1; display: flex; flex-direction: column; padding: 26px 22px; max-width: 1080px; margin: 0 auto; width: 100%; }
.share-main.wide { max-width: 1280px; }
.share-file-head { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; flex-wrap: wrap; }
.share-file-head .fico { width: 44px; height: 44px; flex: none; }
.share-file-head h1 { font-size: 17px; margin: 0; word-break: break-word; }
.share-file-head .fmeta { color: var(--muted); font-size: 12.5px; }
.share-file-head .btn { margin-left: auto; }
.share-stage { flex: 1; min-height: 380px; display: grid; place-items: center; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; position: relative; padding: 14px; }
.share-footer { text-align: center; color: var(--muted); font-size: 12px; padding: 18px; border-top: 1px solid var(--border); }
.share-footer a { color: var(--muted); }

/* Share folder browser reuses grid/list */
.share-crumbs { margin-bottom: 14px; }

/* Expired / error pages */
.center-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; text-align: center; }
.center-page .big { font-size: 56px; font-weight: 700; background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 8px; }
.center-page h1 { font-size: 19px; margin: 0 0 8px; }
.center-page p { color: var(--muted); margin: 0 0 22px; }

/* Shortcuts cheat sheet */
.shortcuts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 26px; font-size: 13px; }
.shortcuts-grid > div { display: flex; justify-content: space-between; gap: 14px; align-items: center; padding: 3px 0; }

/* Settings page */
.settings { max-width: 620px; }
.settings .panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 18px; }
.settings .panel h3 { margin: 0 0 14px; font-size: 14.5px; }
.session-row { display: flex; align-items: center; gap: 12px; padding: 9px 0; border-top: 1px solid var(--border); font-size: 13px; }
.session-row:first-of-type { border-top: none; }
.session-row .who { flex: 1; min-width: 0; }
.session-row .ua { color: var(--muted); font-size: 11.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Activity page */
.activity-list { max-width: 760px; }
.act-row { display: flex; gap: 13px; padding: 10px 6px; border-bottom: 1px solid var(--border); font-size: 13px; align-items: flex-start; }
.act-row svg { width: 16px; height: 16px; color: var(--muted); flex: none; margin-top: 2px; }
.act-row .when { margin-left: auto; color: var(--muted); font-size: 11.5px; white-space: nowrap; }

/* Shares manager */
.shares-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.shares-table th { text-align: left; color: var(--muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.shares-table td { padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.shares-table .url-cell { display: flex; gap: 6px; align-items: center; font: 11.5px var(--font-mono); }

/* ── Text editor overlay ────────────────────────────────────── */
.editor-overlay { background: var(--bg); }
.editor-body { flex: 1; min-height: 0; display: flex; padding: 0 18px 18px; }
.editor-text {
  flex: 1; resize: none; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  font: 13px/1.65 var(--font-mono); padding: 18px 22px; tab-size: 4;
}
.editor-text:focus { border-color: var(--accent); outline: none; }
.editor-overlay .preview-head { color: var(--text); }
.editor-overlay .preview-head .size { color: var(--muted); }
.editor-overlay .preview-head .btn { background: var(--surface-2); border-color: var(--border); color: var(--text); }
.editor-overlay .preview-head .btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.editor-dirty { color: var(--warning); font-size: 12px; white-space: nowrap; }
.editor-status { color: var(--muted); font-size: 12px; align-self: center; white-space: nowrap; }

/* ── Storage insights page ──────────────────────────────────── */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; margin-bottom: 18px; }
.stat-tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.stat-tile .v { font-size: 21px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-tile .l { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 2px; }
.stat-tile .s { font-size: 11.5px; color: var(--muted); margin-top: 5px; }
.storage-page { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.storage-page .panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.storage-page .panel h3 { margin: 0 0 12px; font-size: 14.5px; }
.big-file { display: flex; align-items: center; gap: 10px; padding: 6px 4px; border-radius: var(--radius-sm); cursor: pointer; }
.big-file:hover { background: var(--surface-2); }
.big-file svg { width: 16px; height: 16px; flex: none; }
.big-file .bf-main { flex: 1; min-width: 0; }
.big-file .bf-name { font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.big-file .bf-path { color: var(--muted); font-size: 11px; }
.big-file .bf-bar { height: 4px; border-radius: 2px; background: var(--surface-2); overflow: hidden; margin-top: 3px; }
.big-file .bf-bar i { display: block; height: 100%; background: var(--accent); border-radius: 2px; }
.big-file .bf-size { font: 11.5px var(--font-mono); color: var(--muted); white-space: nowrap; }
.dup-group { border-top: 1px solid var(--border); padding: 9px 0; }
.dup-group:first-of-type { border-top: none; }
.dup-head { font-size: 12.5px; margin-bottom: 5px; }
.dup-row { display: flex; align-items: center; gap: 6px; font-size: 12px; padding: 2px 0; }
.dup-row .crumb { flex: 1; min-width: 0; text-align: left; overflow: hidden; text-overflow: ellipsis; font-family: var(--font-mono); font-size: 11.5px; }

/* ── Public file-request page ───────────────────────────────── */
.request-main { max-width: 620px; justify-content: center; }
.request-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; }
.request-card h1 { font-size: 19px; margin: 0 0 6px; }
.request-label { color: var(--accent); font-size: 14px; margin: 0 0 6px; }
.request-sub { color: var(--muted); font-size: 13px; margin: 0 0 20px; }
.request-drop {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 42px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  color: var(--muted); cursor: pointer; text-align: center;
  transition: border-color 150ms var(--ease), background 150ms var(--ease);
}
.request-drop:hover, .request-drop.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.request-drop svg { width: 38px; height: 38px; }
.request-card .upload-list { margin-top: 14px; max-height: 320px; }
.request-card .upload-item { border-top: 1px solid var(--border); padding: 9px 4px; }

/* ── Bottom navigation (mobile app bar) ─────────────────────── */
.bottomnav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 62;
  display: none; align-items: center; justify-content: space-around;
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
}
.bottomnav button {
  background: none; border: none; cursor: pointer; color: var(--muted);
  width: 52px; height: 42px; border-radius: 13px;
  display: grid; place-items: center;
  transition: color 150ms var(--ease), background 150ms var(--ease), transform 150ms var(--spring);
}
.bottomnav button svg { width: 21px; height: 21px; }
.bottomnav button:active { transform: scale(0.92); }
.bottomnav button.active { color: var(--accent-ink); background: var(--accent-soft); }
.bottomnav .bn-fab {
  width: 54px; height: 54px; border-radius: 18px; margin-top: -22px;
  background: var(--grad-brand); color: #fff;
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}
.bottomnav .bn-fab svg { width: 24px; height: 24px; }
.bottomnav .bn-fab.active { color: #fff; }

/* ── Responsive ─────────────────────────────────────────────── */
.sidebar-toggle { display: none; }

@media (max-width: 900px) {
  .body, .body.info-open { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; z-index: 65; top: 0; bottom: 0; left: 0;
    width: min(300px, 84vw); padding-top: calc(14px + env(safe-area-inset-top));
    background: var(--surface);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    translate: -102% 0; transition: translate 240ms var(--spring);
    box-shadow: var(--shadow-pop);
  }
  .sidebar.open { translate: 0 0; }
  .sidebar-scrim.active { display: block; animation: fade 180ms var(--ease); }
  .sidebar-toggle { display: inline-flex; }

  /* Info panel becomes a bottom sheet */
  .info-panel {
    position: fixed; z-index: 66; left: 0; right: 0; bottom: 0; top: auto;
    width: auto; max-height: 72vh; border-left: none; border-top: 1px solid var(--border);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    box-shadow: var(--shadow-pop);
    padding-bottom: calc(18px + env(safe-area-inset-bottom));
  }
  .body.info-open .info-panel { display: block; animation: sheet-up 240ms var(--spring); }
  .info-panel::before {
    content: ''; display: block; width: 40px; height: 4px; border-radius: 2px;
    background: var(--border-strong); margin: 0 auto 12px;
  }

  .searchbox { max-width: none; }
  .brand span { display: none; }
  .topbar { gap: 8px; }
  /* The FAB owns "new/upload" on phones */
  #uploadBtn { display: none; }
  .bottomnav { display: flex; }
  .content { padding: 12px 12px calc(120px + env(safe-area-inset-bottom)); }
  .toasts { bottom: calc(84px + env(safe-area-inset-bottom)); }
  .upload-panel { width: calc(100vw - 20px); right: 10px; bottom: calc(78px + env(safe-area-inset-bottom)); }

  /* Bigger touch targets everywhere */
  .nav-item { padding: 11px 12px; font-size: 14.5px; }
  .tree-toggle { height: 34px; }
  .tree-label { padding: 8px 6px 8px 0; font-size: 14px; }
  .btn { padding: 9px 16px; }
  .btn.icon { padding: 9px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(min(var(--card, 150px), 44vw), 1fr)); gap: 10px; }
  .card .meta { padding: 10px 12px; }
  .toolbar { padding: 8px 12px; min-height: 48px; overflow-x: auto; flex-wrap: nowrap; scrollbar-width: none; }
  .toolbar::-webkit-scrollbar { display: none; }
  .toolbar input[type='range'] { display: none; } /* card-size slider is pointless on touch */
  .crumbs { flex: none; max-width: 60vw; overflow-x: auto; scrollbar-width: none; }

  .list-header, .row { grid-template-columns: 26px 1fr 78px; }
  .list-header > :nth-child(n+4), .row > :nth-child(n+4) { display: none; }
  .row { padding: 9px 10px; }

  .preview-body { padding: 0 6px calc(10px + env(safe-area-inset-bottom)); }
  .preview-nav { width: 40px; height: 40px; }
  .preview-nav.prev { left: 4px; } .preview-nav.next { right: 4px; }
  .preview-head { padding: calc(10px + env(safe-area-inset-top)) 12px 10px; }
  .pdf-rail { display: none; }
  .pv-toolbar { bottom: calc(14px + env(safe-area-inset-bottom)); max-width: 96vw; overflow-x: auto; }
  .editor-body { padding: 0 10px calc(10px + env(safe-area-inset-bottom)); }
  .editor-text { padding: 14px; font-size: 14px; }

  .storage-page { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; gap: 10px; }
  .shares-table { display: block; overflow-x: auto; }
  .modal { max-height: 80vh; }
  .request-card { padding: 22px 18px; }
}

@media print {
  .topbar, .sidebar, .toolbar, .preview-head, .pv-toolbar, .preview-nav { display: none !important; }
}