:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --surface-2: #efefec;
  --text: #1c1c1a;
  --muted: #6b6b66;
  --border: #e0e0dc;
  --accent: #2f5bea;
  --accent-text: #ffffff;
  --warn-bg: #fff4d6;
  --warn-text: #7a5600;
  --error-bg: #fde8e6;
  --error-text: #9b1c12;
  --shadow: 0 1px 2px rgba(0, 0, 0, .06), 0 4px 16px rgba(0, 0, 0, .06);
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141413;
    --surface: #1d1d1b;
    --surface-2: #272725;
    --text: #ececea;
    --muted: #9a9a94;
    --border: #33332f;
    --accent: #6b8cff;
    --accent-text: #0b0b0b;
    --warn-bg: #3a2f10;
    --warn-text: #f3d48a;
    --error-bg: #3d1915;
    --error-text: #ffb4aa;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .3);
    color-scheme: dark;
  }
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

button, input { font: inherit; color: inherit; }

/* ---------- top bar / search ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 14px 20px 10px;
}
.search { max-width: 980px; margin: 0 auto; }
.search__box {
  display: flex; align-items: center; gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 5px 5px 6px;
  box-shadow: var(--shadow);
  transition: border-color .15s;
}
.search__box:focus-within { border-color: var(--accent); }
.search__box.is-dragover { border-color: var(--accent); border-style: dashed; }
.search__attach {
  flex: none; width: 38px; height: 38px; border-radius: 50%;
  border: 0; background: transparent; color: var(--muted); cursor: pointer;
  display: grid; place-items: center;
}
.search__attach:hover { background: var(--surface-2); color: var(--text); }
.search__attach svg { width: 22px; height: 22px; }
.search__chip { position: relative; flex: none; }
.search__chip img {
  display: block; width: 38px; height: 38px; object-fit: cover;
  border-radius: 8px; border: 1px solid var(--border);
}
.search__chip button {
  position: absolute; top: -6px; right: -6px;
  width: 18px; height: 18px; border-radius: 50%;
  border: 0; background: var(--text); color: var(--bg);
  font-size: 13px; line-height: 18px; padding: 0; cursor: pointer;
}
.search input[type="text"] {
  flex: 1; min-width: 0; border: 0; outline: 0; background: transparent;
  padding: 8px 6px; font-size: 15px;
}
.search__submit {
  flex: none; border: 0; border-radius: 999px; cursor: pointer;
  background: var(--accent); color: var(--accent-text);
  padding: 9px 20px; font-weight: 600;
}
.search__submit:disabled { opacity: .6; cursor: progress; }
.search__options {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  flex-wrap: wrap; margin-top: 10px; padding: 0 4px;
}
.hint { color: var(--muted); font-size: 12px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }

.segmented { display: inline-flex; background: var(--surface-2); border-radius: 8px; padding: 2px; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: block; padding: 4px 12px; border-radius: 6px; cursor: pointer; color: var(--muted); }
.segmented input:checked + span { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.segmented input:focus-visible + span { outline: 2px solid var(--accent); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 8px; padding: 7px 14px; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--muted); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn--ghost { background: transparent; }

/* ---------- main ---------- */
main { max-width: 1600px; margin: 0 auto; padding: 16px 20px 40px; }

.empty { text-align: center; padding: 12vh 16px; color: var(--muted); }
.empty h1 { color: var(--text); font-size: 22px; margin: 0 0 6px; font-weight: 600; }
.examples { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 18px; }

.context {
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 10px;
}
.context img { width: 44px; height: 44px; object-fit: cover; border-radius: 6px; }
.context__text { flex: 1; min-width: 0; }
.context__text b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.context__text span { color: var(--muted); font-size: 12px; }

.status { margin-bottom: 14px; color: var(--muted); }
.status.is-warn { background: var(--warn-bg); color: var(--warn-text); padding: 10px 14px; border-radius: var(--radius); }
.status.is-error { background: var(--error-bg); color: var(--error-text); padding: 10px 14px; border-radius: var(--radius); }

/* ---------- grid ---------- */
.grid {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}
.card {
  position: relative; overflow: hidden; border-radius: var(--radius);
  background: var(--surface-2); aspect-ratio: 4 / 3; cursor: zoom-in;
  outline-offset: 2px;
}
.card img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  opacity: 0; transition: opacity .25s, transform .3s;
}
.card img.is-loaded { opacity: 1; }
.card:hover img { transform: scale(1.03); }
.card__placeholder {
  position: absolute; inset: 0; display: grid; place-content: center; text-align: center; gap: 2px;
  color: var(--muted); font-size: 12px;
}
.card__placeholder b { font-size: 20px; letter-spacing: .05em; color: var(--text); }
.card__overlay {
  position: absolute; inset: auto 0 0 0; padding: 28px 10px 8px;
  display: flex; align-items: flex-end; gap: 8px;
  background: linear-gradient(transparent, rgba(0, 0, 0, .65));
  color: #fff; opacity: 0; transition: opacity .15s;
}
.card:hover .card__overlay, .card:focus-visible .card__overlay, .card:focus-within .card__overlay { opacity: 1; }
.card__title { flex: 1; min-width: 0; font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card__similar {
  flex: none; border: 0; border-radius: 6px; padding: 4px 9px; cursor: pointer;
  background: rgba(255, 255, 255, .92); color: #111; font-size: 12px; font-weight: 600;
}
.badge {
  position: absolute; top: 8px; left: 8px;
  font-size: 11px; font-weight: 600; letter-spacing: .02em;
  padding: 2px 7px; border-radius: 5px;
  background: var(--warn-bg); color: var(--warn-text);
}
.badge--nda { background: var(--error-bg); color: var(--error-text); }
.card--skeleton { cursor: default; animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .55; } }

.more { text-align: center; margin-top: 20px; }

/* ---------- selection ---------- */
.toolbar { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; color: var(--muted); }
.link { border: 0; background: none; padding: 0; color: var(--accent); cursor: pointer; font-weight: 500; }
.link:hover { text-decoration: underline; }

.card__check {
  position: absolute; top: 8px; right: 8px; z-index: 1;
  width: 26px; height: 26px; border-radius: 50%; padding: 4px; cursor: pointer;
  border: 2px solid #fff; background: rgba(0, 0, 0, .25); color: transparent;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .35);
  opacity: 0; transition: opacity .15s, background .15s;
}
.card__check svg { width: 100%; height: 100%; display: block; }
.card:hover .card__check, .card:focus-visible .card__check, .card__check:focus-visible,
.has-selbar .card__check, .card.is-selected .card__check { opacity: 1; }
.card__check:hover { background: rgba(0, 0, 0, .45); color: rgba(255, 255, 255, .7); }
.card.is-selected .card__check { background: var(--accent); border-color: var(--accent); color: #fff; }
.card.is-selected { box-shadow: 0 0 0 3px var(--accent); }
.card.is-selected img { transform: scale(.94); border-radius: 6px; }

.selbar {
  position: fixed; left: 50%; bottom: 16px; z-index: 20; transform: translateX(-50%);
  width: min(760px, calc(100% - 24px));
  display: flex; align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 8px 8px 8px 10px; box-shadow: 0 8px 32px rgba(0, 0, 0, .18);
}
.selbar__thumbs { display: flex; flex: none; }
.selbar__thumbs img {
  width: 34px; height: 34px; object-fit: cover; border-radius: 6px;
  border: 2px solid var(--surface); margin-left: -10px; background: var(--surface-2);
}
.selbar__thumbs img:first-child { margin-left: 0; }
.selbar__count { flex: 1; font-weight: 600; white-space: nowrap; }
.selbar__actions { display: flex; gap: 6px; }
.selbar .btn:disabled { opacity: .6; cursor: progress; }
.has-selbar main { padding-bottom: 96px; }
.has-selbar .lightbox { z-index: 50; }

.btn--select.is-on { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }

/* ---------- drop overlay ---------- */
.dropzone {
  position: fixed; inset: 0; z-index: 30; display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  pointer-events: none;
}
.dropzone div {
  background: var(--surface); padding: 18px 26px; border-radius: 12px;
  border: 2px dashed var(--accent); font-weight: 600; box-shadow: var(--shadow);
}

/* ---------- lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 40;
  display: grid; grid-template-columns: 48px 1fr 48px 320px; align-items: center;
  background: rgba(10, 10, 10, .92); color: #eee;
}
.lightbox[hidden] { display: none; }
.lightbox__stage { margin: 0; height: 100vh; display: grid; place-items: center; padding: 24px 8px; min-width: 0; }
.lightbox__stage img { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 4px; color: #bbb; }
.lightbox__nav, .lightbox__close {
  border: 0; background: transparent; color: #fff; cursor: pointer; font-size: 36px; opacity: .7;
}
.lightbox__nav:hover, .lightbox__close:hover { opacity: 1; }
.lightbox__close { position: absolute; top: 8px; right: 14px; font-size: 32px; z-index: 1; }
.lightbox__info {
  align-self: stretch; background: #1b1b1a; padding: 56px 20px 20px; overflow: auto;
}
.lightbox__info h2 { font-size: 15px; margin: 0 0 14px; word-break: break-word; }
.lightbox__info dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 0 0 18px; font-size: 13px; }
.lightbox__info dt { color: #999; }
.lightbox__info dd { margin: 0; }
.lightbox__actions { display: flex; flex-wrap: wrap; gap: 8px; }
.lightbox .btn:not(.btn--primary) { background: #2a2a28; border-color: #3a3a37; color: #eee; }

@media (max-width: 760px) {
  .topbar { padding: 10px 12px 8px; }
  main { padding: 12px 12px 32px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
  .hint { display: none; }
  .card__overlay { opacity: 1; }
  .card__check { opacity: 1; }
  .selbar { flex-wrap: wrap; bottom: 8px; }
  .selbar__thumbs { display: none; }
  .selbar__actions { width: 100%; }
  .selbar__actions .btn { flex: 1; padding: 7px 6px; white-space: nowrap; font-size: 13px; }
  .lightbox { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .lightbox__nav { display: none; }
  .lightbox__stage { height: auto; max-height: 60vh; }
  .lightbox__info { padding: 16px; }
}