:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --sidebar: #eef1f5;
  --text: #1d2330;
  --muted: #6b7385;
  --border: #dde1e8;
  --hover: #f1f4f9;
  --accent: #3b6fd8;
  --accent-text: #ffffff;
  --danger: #c23b3b;
  --ok: #2e8b57;
  --radius: 8px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181e;
    --panel: #1c2028;
    --sidebar: #191c23;
    --text: #e4e7ee;
    --muted: #8d95a7;
    --border: #2c323d;
    --hover: #232833;
    --accent: #5b8cf0;
    --danger: #e06666;
    --ok: #5cbf86;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

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; }
h2 { margin: 0; font-size: 18px; }

button, .button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: inherit;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
}
button:hover, .button:hover { background: var(--hover); text-decoration: none; }
.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.primary:hover { background: var(--accent); filter: brightness(1.08); }
.small { padding: 3px 9px; font-size: 13px; }
.danger { color: var(--danger); }
button.link { border: 0; background: none; padding: 0; color: var(--muted); font-size: 13px; }
button.link:hover { color: var(--text); background: none; }

input {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; }
.muted { color: var(--muted); }
.error { color: var(--danger); }
.brand { font-weight: 700; font-size: 20px; letter-spacing: -0.02em; margin: 0; }

/* Login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(360px, 100%); padding: 28px; display: grid; gap: 14px; }
.login-card label { display: grid; gap: 4px; color: var(--muted); font-size: 13px; }
.login-card .error { margin: 0; min-height: 1.2em; }
.login-card button { justify-content: center; }

/* Layout */
.app { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sidebar nav { display: grid; gap: 4px; }
.nav { border: 0; background: none; justify-content: flex-start; width: 100%; }
.nav.active { background: var(--panel); box-shadow: 0 0 0 1px var(--border); font-weight: 600; }
.me { margin-top: auto; display: grid; gap: 6px; justify-items: start; }
.me span { font-weight: 600; }

.content { padding: 20px 28px; min-width: 0; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.actions { display: flex; gap: 8px; }
.crumbs { font-size: 16px; display: flex; gap: 6px; flex-wrap: wrap; align-items: baseline; }
.crumbs .sep { color: var(--muted); }

/* File table */
.table-wrap { position: relative; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; min-height: 200px; }
table.files { width: 100%; border-collapse: collapse; }
#admin-view table.files { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; border-collapse: separate; border-spacing: 0; }
.files th { text-align: left; font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); padding: 10px 14px; border-bottom: 1px solid var(--border); }
.files td { padding: 8px 14px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.files tr:last-child td { border-bottom: 0; }
.files tbody tr:hover { background: var(--hover); }
.files td:first-child { width: 100%; max-width: 0; overflow: hidden; text-overflow: ellipsis; }
.files .num, .files .when { color: var(--muted); }
.files .num { text-align: right; }
.name { color: var(--text); display: inline-flex; align-items: center; gap: 8px; }
.icon { width: 1.3em; text-align: center; }
.row-actions { text-align: right; }
.row-actions > * { margin-left: 4px; visibility: hidden; }
tr:hover .row-actions > *, .row-actions > *:focus { visibility: visible; }
.empty { text-align: center; color: var(--muted); padding: 40px 16px; margin: 0; }

.drop-overlay {
  display: none;
  position: absolute; inset: 0;
  place-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 2px dashed var(--accent);
  border-radius: 12px;
  font-size: 16px; font-weight: 600; color: var(--accent);
  pointer-events: none;
}
.dragging .drop-overlay { display: grid; }

/* Admin */
.add-user { display: flex; gap: 8px; padding: 12px; margin-bottom: 14px; flex-wrap: wrap; align-items: center; }
.add-user input[name] { flex: 1 1 160px; }
.check { display: inline-flex; gap: 6px; align-items: center; color: var(--muted); }

/* Uploads + toast */
.uploads { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; width: min(320px, calc(100vw - 32px)); z-index: 10; }
.upload { padding: 12px; display: grid; gap: 6px; box-shadow: 0 4px 16px rgb(0 0 0 / 0.12); }
.upload-title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
.bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width 0.2s; }
.upload.done .bar span { background: var(--ok); width: 100% !important; }
.upload.failed .bar span { background: var(--danger); }
.upload.failed .muted { color: var(--danger); }
.upload button { justify-self: start; }

.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: var(--radius);
  box-shadow: 0 4px 16px rgb(0 0 0 / 0.2);
  z-index: 20; max-width: calc(100vw - 32px);
}
.toast.error { background: var(--danger); color: #fff; }

/* Small screens */
@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; flex-wrap: wrap; align-items: center; padding: 10px 16px; gap: 12px; border-right: 0; border-bottom: 1px solid var(--border); }
  .sidebar nav { display: flex; }
  .nav { width: auto; }
  .me { margin: 0 0 0 auto; display: flex; gap: 12px; align-items: center; }
  .content { padding: 16px; }
  .files .when { display: none; }
  .row-actions > * { visibility: visible; }
}