:root {
  --bg: #f5f6f8; --panel: #ffffff; --panel2: #eef0f4; --border: #dfe3ea;
  --text: #1a1d23; --muted: #6b7280; --accent: #2563eb; --accent-text: #fff;
  --danger: #dc2626; --ok: #16a34a; --shadow: 0 1px 2px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.06);
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --panel: #171a21; --panel2: #1f232c; --border: #2a2f3a;
    --text: #e6e8ee; --muted: #8b93a3; --accent: #3b82f6; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.35);
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: var(--bg); color: var(--text); }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); }
[hidden] { display: none !important; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel); color: var(--text); white-space: nowrap; }
.btn:hover { background: var(--panel2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.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.sm { padding: 4px 8px; font-size: 12.5px; }
.btn.icon { padding: 6px; }
.input { padding: 7px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel); color: var(--text); min-width: 0; }
.input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); border-color: var(--accent); }

/* layout */
.layout { display: grid; grid-template-columns: 260px 1fr; grid-template-rows: 56px 1fr; height: 100vh; }
header.top { grid-column: 1 / -1; display: flex; align-items: center; gap: 12px; padding: 0 16px; background: var(--panel); border-bottom: 1px solid var(--border); }
header.top h1 { font-size: 16px; margin: 0 auto 0 0; display: flex; align-items: center; gap: 8px; }
header.top h1 span { color: var(--muted); font-weight: 400; font-size: 13px; }
aside { background: var(--panel); border-right: 1px solid var(--border); overflow-y: auto; padding: 10px; }
main { overflow-y: auto; padding: 18px 22px; }
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; grid-template-rows: 56px auto 1fr; }
  aside { border-right: 0; border-bottom: 1px solid var(--border); max-height: 32vh; }
  main { padding: 12px; }
}

/* sidebar */
.side-h { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 8px 8px 4px; }
.country { border-radius: 8px; margin-bottom: 2px; }
.country > .row { display: flex; align-items: center; gap: 8px; padding: 7px 8px; border-radius: 8px; cursor: pointer; }
.country > .row:hover, .subj:hover { background: var(--panel2); }
.country.active > .row { background: color-mix(in srgb, var(--accent) 14%, transparent); }
.flag { font-size: 18px; line-height: 1; width: 22px; text-align: center; }
.country .code { font-weight: 600; }
.count { margin-left: auto; color: var(--muted); font-size: 12px; background: var(--panel2); padding: 1px 7px; border-radius: 99px; }
.country.active .count { background: var(--panel); }
.subjects { padding: 2px 0 4px 22px; }
.subj { display: flex; align-items: center; gap: 6px; padding: 5px 8px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.subj.active { background: color-mix(in srgb, var(--accent) 18%, transparent); font-weight: 600; }
.empty { color: var(--muted); padding: 24px 8px; text-align: center; }

/* toolbar + breadcrumb */
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 14px; }
.crumb { font-size: 18px; font-weight: 600; display: flex; align-items: center; gap: 6px; margin-right: auto; }
.crumb a { color: inherit; text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
.crumb .sep { color: var(--muted); font-weight: 300; }
.crumb small { color: var(--muted); font-weight: 400; font-size: 13px; margin-left: 6px; }
.spacer { flex: 1; }

/* subject cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; cursor: pointer; transition: transform .12s, box-shadow .12s; }
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card .cover { aspect-ratio: 4/3; background: var(--panel2) center/cover no-repeat; display: grid; place-items: center; color: var(--muted); font-size: 32px; }
.card .cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .meta { padding: 9px 11px; display: flex; align-items: center; gap: 6px; }
.card .meta b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* image grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.tile { position: relative; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.tile.sel { outline: 2px solid var(--accent); border-color: var(--accent); }
.tile .thumb { aspect-ratio: 1; background: repeating-conic-gradient(var(--panel2) 0 25%, transparent 0 50%) 0 0/16px 16px; display: grid; place-items: center; cursor: zoom-in; overflow: hidden; }
.tile .thumb img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
.tile .chk { position: absolute; top: 8px; left: 8px; width: 22px; height: 22px; margin: 0; accent-color: var(--accent); cursor: pointer; opacity: .85; }
.tile .acts { position: absolute; top: 6px; right: 6px; display: flex; gap: 4px; opacity: 0; transition: opacity .12s; }
.tile:hover .acts, .tile.sel .acts { opacity: 1; }
.tile .acts .btn { padding: 4px 6px; font-size: 12px; background: color-mix(in srgb, var(--panel) 90%, transparent); backdrop-filter: blur(4px); }
.tile .info { padding: 7px 10px; font-size: 12px; }
.tile .info .nm { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12.5px; }
.tile .info .dim { color: var(--muted); }
.selbar { position: sticky; bottom: 0; margin: 16px -22px -18px; padding: 10px 22px; background: var(--panel); border-top: 1px solid var(--border); display: flex; gap: 8px; align-items: center; }
.selbar b { margin-right: auto; }

/* modal */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal { background: var(--panel); border-radius: 14px; width: min(640px, 100%); max-height: 92vh; overflow: auto; box-shadow: var(--shadow); }
.modal header { display: flex; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 15px; }
.modal header .x { margin-left: auto; }
.modal .body { padding: 18px; display: grid; gap: 14px; }
.field { display: grid; gap: 5px; }
.field label { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.drop { border: 2px dashed var(--border); border-radius: 12px; padding: 26px; text-align: center; color: var(--muted); cursor: pointer; transition: .12s; }
.drop.over, .drop:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, transparent); }
.drop b { color: var(--text); }
.qlist { display: grid; gap: 6px; max-height: 260px; overflow: auto; }
.q { display: grid; grid-template-columns: 44px 1fr auto; gap: 10px; align-items: center; padding: 6px; border: 1px solid var(--border); border-radius: 8px; font-size: 12.5px; }
.q img { width: 44px; height: 44px; object-fit: cover; border-radius: 6px; background: var(--panel2); }
.q .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.q .bar { height: 4px; background: var(--panel2); border-radius: 4px; overflow: hidden; margin-top: 4px; }
.q .bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .15s; }
.q.done .bar i { background: var(--ok); width: 100%; }
.q.err { border-color: var(--danger); }
.q .st { color: var(--muted); font-size: 12px; }
.q.err .st { color: var(--danger); }
.modal footer { display: flex; align-items: center; gap: 8px; padding: 12px 18px; border-top: 1px solid var(--border); }
.modal footer .note { color: var(--muted); font-size: 12px; margin-right: auto; }

/* lightbox */
.lb { position: fixed; inset: 0; background: rgba(0,0,0,.88); z-index: 60; display: grid; grid-template-rows: 1fr auto; }
.lb img { max-width: 96vw; max-height: 86vh; place-self: center; object-fit: contain; box-shadow: 0 10px 40px rgba(0,0,0,.6); }
.lb .cap { display: flex; align-items: center; gap: 10px; padding: 10px 16px; color: #ddd; font-size: 13px; background: rgba(0,0,0,.4); }
.lb .cap b { margin-right: auto; }
.lb .nav { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(255,255,255,.12); color: #fff; border: 0; width: 44px; height: 64px; border-radius: 8px; font-size: 24px; }
.lb .nav.prev { left: 12px; } .lb .nav.next { right: 12px; }
.lb .close { position: absolute; top: 12px; right: 12px; background: rgba(255,255,255,.12); color: #fff; border: 0; width: 38px; height: 38px; border-radius: 50%; font-size: 20px; }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login form { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 28px; width: min(360px, 100%); display: grid; gap: 12px; box-shadow: var(--shadow); }
.login h1 { margin: 0 0 4px; font-size: 20px; }
.err { color: var(--danger); font-size: 13px; }

/* toast */
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 13px; z-index: 100; box-shadow: var(--shadow); }