:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --text: #1d2330;
  --muted: #6b7280;
  --border: #dde1e7;
  --primary: #1f6feb;
  --primary-text: #ffffff;
  --danger: #c62828;
  --error-bg: #fdecea;
  --radius: 8px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --panel: #1d2128;
    --text: #e6e8eb;
    --muted: #9aa3ae;
    --border: #323842;
    --primary: #4c8dff;
    --danger: #ef5350;
    --error-bg: #3a1f1f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--primary); }
code { font-size: 13px; word-break: break-all; }
.muted { color: var(--muted); }
[hidden] { display: none !important; }

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
.tabs { display: flex; gap: 4px; flex: 1; }
.tab {
  border: 0; background: none; color: var(--muted); padding: 6px 12px;
  border-radius: var(--radius); cursor: pointer; font: inherit;
}
.tab.active { background: var(--bg); color: var(--text); font-weight: 600; }
.who { display: flex; align-items: center; gap: 10px; }
.who form { margin: 0; }

.view { max-width: 1280px; margin: 0 auto; padding: 16px; }
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 16px;
}
.panel h2 { font-size: 17px; margin: 0 0 10px; }
.panel-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; }

.breadcrumbs { margin: 4px 0 12px; font-size: 16px; }
.breadcrumbs .sep { margin: 0 6px; color: var(--muted); }

.folder-info .row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 4px 0; }
.folder-info .label { width: 130px; color: var(--muted); }

.btn {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: var(--radius);
  padding: 7px 14px;
  font: inherit;
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--primary); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-danger { color: var(--danger); }
.btn-small { padding: 3px 9px; font-size: 13px; }

input[type=text], input[type=password], select {
  font: inherit;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  max-width: 100%;
}

.upload-form fieldset { border: 0; padding: 0; margin: 0 0 10px; }
.upload-form legend { font-weight: 600; margin-bottom: 4px; }
label.inline { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 4px 0; }
.pickers { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 10px 0; }
.actions { display: flex; gap: 8px; margin-top: 10px; }
.upload-progress progress { width: 100%; height: 14px; }
.errors { color: var(--danger); padding-left: 18px; max-height: 260px; overflow: auto; }

.inline-form { display: flex; gap: 6px; }
.folders { list-style: none; margin: 0; padding: 0; }
.folders li {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: 6px; padding: 6px 0; border-bottom: 1px solid var(--border);
}
.folders li:last-child { border-bottom: 0; }
.folder-link { font-weight: 500; text-decoration: none; word-break: break-word; }
.folder-actions { display: flex; gap: 4px; }

.photos { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.photo { margin: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.photo img, .photo .no-thumb { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--bg); }
.photo .no-thumb { display: flex; align-items: center; justify-content: center; color: var(--muted); }
.photo figcaption { padding: 6px 8px 0; display: flex; flex-direction: column; font-size: 13px; }
.photo .name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.photo-actions { display: flex; flex-wrap: wrap; gap: 4px; padding: 6px 8px 8px; }

.users { width: 100%; border-collapse: collapse; }
.users th, .users td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); }
.users td .btn { margin: 2px; }
.user-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
.user-form label { display: flex; flex-direction: column; gap: 4px; }

.login-page { display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 16px; }
.login-box { width: 100%; max-width: 360px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.login-box h1 { margin: 0; font-size: 22px; }
.login-box form { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }
.login-box label { display: flex; flex-direction: column; gap: 4px; }
.alert-error { background: var(--error-bg); color: var(--danger); padding: 8px 12px; border-radius: var(--radius); margin-top: 12px; }

.toast {
  position: fixed; right: 16px; bottom: 16px; max-width: min(480px, calc(100vw - 32px));
  background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(0, 0, 0, .2); word-break: break-word;
}
.toast-error { background: var(--danger); color: #fff; }

@media (max-width: 640px) {
  .users thead { display: none; }
  .users td { display: block; border: 0; padding: 2px 0; }
  .users tr { display: block; border-bottom: 1px solid var(--border); padding: 8px 0; }
  .folder-info .label { width: 100%; }
}