:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1c1f24;
  --muted: #6b7280;
  --border: #e3e6ea;
  --hover: #f0f2f5;
  --selected: #e8f0fe;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --danger: #dc2626;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --panel: #1a1d22;
    --text: #e6e8eb;
    --muted: #9aa1ab;
    --border: #2b2f36;
    --hover: #22262c;
    --selected: #1e2a40;
    --accent: #4f8bff;
    --danger: #f05252;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button, .button {
  font: inherit;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
}
button:hover, .button:hover { background: var(--hover); }
button.primary, .button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.primary:hover, .button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--danger); }
button.ghost { border-color: transparent; background: transparent; }
button.small { padding: 2px 8px; font-size: 12px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.topbar form { margin: 0; }
.brand { font-weight: 700; font-size: 16px; color: var(--text); }

main { max-width: 1100px; margin: 0 auto; padding: 20px; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
#selection-actions { display: inline-flex; gap: 8px; align-items: center; }
#selection-actions[hidden] { display: none; }
#selection-count { color: var(--muted); margin-right: 4px; }

.crumbs { font-size: 15px; display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.crumbs .sep { color: var(--muted); }
.crumbs .current { font-weight: 600; }

table.files {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.files th, .files td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.files th { font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
.files tbody tr:last-child td { border-bottom: none; }
.files tbody tr:hover { background: var(--hover); }
.files tbody tr.selected { background: var(--selected); }
.files tbody tr.drop-target { outline: 2px dashed var(--accent); outline-offset: -2px; }
.col-check { width: 36px; }
.col-size { width: 100px; }
.col-date { width: 170px; }
.col-share { width: 250px; }
td.col-size, td.col-date { color: var(--muted); white-space: nowrap; }
.name { display: flex; align-items: center; gap: 8px; word-break: break-all; }
.name .icon { flex: none; width: 18px; text-align: center; }
.share { display: flex; align-items: center; gap: 6px; }
.share .link { color: var(--muted); font-family: ui-monospace, monospace; font-size: 12px; max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.switch { position: relative; display: inline-block; width: 34px; height: 20px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch span {
  position: absolute; inset: 0; cursor: pointer;
  background: var(--border); border-radius: 20px; transition: background 0.15s;
}
.switch span::before {
  content: ""; position: absolute; left: 3px; top: 3px; width: 14px; height: 14px;
  background: #fff; border-radius: 50%; transition: transform 0.15s;
}
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::before { transform: translateX(14px); }
.switch input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.empty { text-align: center; color: var(--muted); padding: 40px 0; }

.drop-overlay {
  position: fixed; inset: 0; z-index: 10;
  display: flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border: 3px dashed var(--accent);
  pointer-events: none;
}
.drop-overlay[hidden] { display: none; }
.drop-overlay div { background: var(--panel); padding: 16px 24px; border-radius: 8px; font-size: 18px; font-weight: 600; box-shadow: var(--shadow); }

.uploads {
  position: fixed; right: 20px; bottom: 20px; z-index: 5;
  width: 340px; max-height: 50vh; overflow: auto;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow);
}
.uploads header { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--border); font-weight: 600; }
.uploads ul { list-style: none; margin: 0; padding: 4px 0; }
.uploads li { padding: 6px 12px; font-size: 13px; }
.uploads .fname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.uploads .bar { height: 4px; background: var(--border); border-radius: 2px; margin-top: 4px; overflow: hidden; }
.uploads .bar div { height: 100%; background: var(--accent); width: 0; transition: width 0.1s; }
.uploads li.done .bar div { background: #16a34a; }
.uploads li.error .bar div { background: var(--danger); width: 100%; }
.uploads li.error .fname::after { content: " — failed"; color: var(--danger); }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 20;
  background: var(--text); color: var(--bg); padding: 8px 16px; border-radius: 6px; box-shadow: var(--shadow);
}
.toast[hidden] { display: none; }

.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login {
  display: flex; flex-direction: column; gap: 12px; width: 300px; padding: 28px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow);
}
.login h1 { margin: 0 0 4px; font-size: 22px; }
.login input { font: inherit; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--text); }
.login button { justify-content: center; padding: 8px; }
.error { color: var(--danger); margin: 0; }

@media (max-width: 700px) {
  .col-date, .col-size { display: none; }
  .col-share { width: auto; }
  .share .link { display: none; }
  main { padding: 12px; }
}