*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #ffffff;
  --bg-alt:   #f5f5f5;
  --met-red:  #ec012a;
  --met-red-hover: #d40025;
  --text:     #1a1a1a;
  --text-secondary: #6b6b6b;
  --muted:    #999999;
  --border:   #e0e0e0;
  --border-hover: #b0b0b0;
  --card-bg:  #ffffff;
  --shadow:   rgba(0,0,0,.08);
  --shadow-hover: rgba(0,0,0,.15);
}

body { font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; }

header {
  background: #ffffff;
  color: var(--text);
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}
.logo { display: grid; grid-template-columns: auto 1fr; align-items: baseline; }
.logo-met  { grid-column: 1; grid-row: 1; font-family: 'Playfair Display', Georgia, serif; font-size: 1.65rem; font-weight: 700; letter-spacing: -.5px; color: var(--met-red); text-align: center; line-height: 1.1; }
.logo-bird { grid-column: 1; grid-row: 2; font-family: 'Playfair Display', Georgia, serif; font-size: 1.65rem; font-weight: 700; letter-spacing: -.5px; color: var(--text); text-align: center; line-height: 1.1; text-transform: uppercase; }
.logo-tag  { grid-column: 2; grid-row: 2; font-size: .75rem; color: var(--muted); margin-left: .6rem; font-style: italic; align-self: baseline; }
.logo-tag-link { color: var(--muted); text-decoration: underline; text-decoration-color: var(--border); text-underline-offset: 2px; transition: color .15s, text-decoration-color .15s; }
.logo-tag-link:hover { color: var(--met-red); text-decoration-color: var(--met-red); }
.index-info { font-size: .72rem; color: var(--muted); text-align: right; line-height: 1.4; }

#setup {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.setup-row {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  align-items: flex-end;
}
.field { display: flex; flex-direction: column; gap: .28rem; }
label  { font-size: .68rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .08em; }

input[type="text"] {
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: 4px;
  padding: .42rem .65rem;
  font-size: .88rem;
  font-family: inherit;
  color: var(--text-secondary);
  width: 260px;
  transition: border-color .15s;
}
input:focus { outline: none; border-color: var(--text); }

#series-select {
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: 4px;
  padding: .42rem .65rem;
  font-size: .88rem;
  font-family: inherit;
  color: var(--text-secondary);
  width: 260px;
  cursor: pointer;
  transition: border-color .15s;
}
#series-select:focus { outline: none; border-color: var(--text); }
#series-select option { color: var(--text-secondary); background: #fff; font-size: .88rem; }
.setup-row + .setup-row { padding-top: 5px; }

.btn { padding: .47rem 1.15rem; border: none; border-radius: 4px; font-family: inherit; font-size: .85rem; font-weight: 600; cursor: pointer; transition: background .15s, transform .1s; }
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--met-red); color: #fff; }
.btn-primary:hover { background: var(--met-red-hover); }

main {
  display: grid;
  grid-template-columns: 1fr 360px;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

#art-panel { display: flex; flex-direction: column; overflow: hidden; border-right: 1px solid var(--border); }

.panel-header {
  padding: .75rem 1rem;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  min-height: 42px;
}
.panel-title { font-size: .78rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .08em; }
.count-badge { font-size: .72rem; background: var(--met-red); color: #fff; border-radius: 99px; padding: .1rem .55rem; font-weight: 600; line-height: 1.2; }

#art-grid {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .85rem;
  align-content: start;
}

.art-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 2px; overflow: hidden; cursor: pointer; transition: transform .18s, box-shadow .18s, border-color .18s; }
.art-card:hover { transform: translateY(-2px); box-shadow: 0 4px 16px var(--shadow-hover); }
.art-card.active { border-color: var(--met-red); box-shadow: 0 0 0 2px rgba(236,1,42,.18); }

.art-thumb { width: 100%; aspect-ratio: 1/1; object-fit: cover; display: block; background: var(--bg-alt); }
.art-thumb-ph { width: 100%; aspect-ratio: 1/1; background: var(--bg-alt); display: flex; align-items: center; justify-content: center; font-size: 2rem; color: var(--border); }
.art-info { padding: .5rem .65rem .65rem; }
.art-name   { font-size: .75rem; font-weight: 600; color: var(--text); line-height: 1.35; }
.art-artist { font-size: .7rem; color: var(--text-secondary); margin-top: .12rem; }
.art-date   { font-size: .68rem; color: var(--muted); margin-top: .08rem; }

#detail-panel { background: var(--card-bg); display: flex; flex-direction: column; overflow: hidden; }
#detail-content { flex: 1; overflow-y: auto; display: flex; flex-direction: column; }

.detail-img-wrap { background: #1a1a1a; display: flex; align-items: center; justify-content: center; cursor: zoom-in; flex-shrink: 0; }
.detail-img-wrap img { max-width: 100%; max-height: 300px; object-fit: contain; display: block; }

.detail-meta { padding: 1.1rem 1.15rem 1.5rem; display: flex; flex-direction: column; gap: .45rem; }
.detail-title  { font-family: 'Playfair Display', Georgia, serif; font-size: 1.05rem; font-weight: 500; color: var(--text); line-height: 1.4; font-style: italic; }
.detail-artist { font-size: .82rem; color: var(--text); font-weight: 600; }
.detail-row    { font-size: .78rem; color: var(--text-secondary); }
.detail-dept   { font-size: .74rem; color: var(--muted); font-style: italic; }
.detail-credit { font-size: .7rem; color: var(--muted); line-height: 1.45; }
.detail-link   { display: inline-block; margin-top: .3rem; font-size: .78rem; color: var(--met-red); text-decoration: none; font-weight: 500; }
.detail-link:hover { text-decoration: underline; }

.taxonomy-info { margin-top: .75rem; padding: .6rem .75rem; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 6px; }
.taxonomy-name { font-size: .82rem; font-weight: 600; color: var(--text); }
.taxonomy-sci { font-size: .75rem; font-style: italic; color: var(--text-secondary); margin-top: .1rem; }
.taxonomy-alias { font-size: .7rem; color: var(--muted); font-style: italic; margin-top: .1rem; }
.taxonomy-family { font-size: .72rem; color: var(--muted); margin-top: .25rem; }
.taxonomy-link { display: inline-block; margin-top: .3rem; font-size: .75rem; color: var(--met-red); text-decoration: none; font-weight: 500; }
.taxonomy-link:hover { text-decoration: underline; }

.state-box { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .55rem; color: var(--muted); padding: 2rem; text-align: center; min-height: 200px; }
.state-icon  { font-size: 2.8rem; opacity: .35; }
.state-title { font-size: .95rem; font-weight: 600; color: var(--text); }
.state-msg   { font-size: .82rem; max-width: 280px; line-height: 1.55; color: var(--text-secondary); }
.state-msg code { font-family: 'SF Mono', 'Fira Code', monospace; background: var(--bg-alt); padding: .1rem .35rem; border-radius: 3px; font-size: .78rem; border: 1px solid var(--border); }
.suggestion-link { color: var(--met-red); text-decoration: none; font-weight: 500; cursor: pointer; }
.suggestion-link:hover { text-decoration: underline; }
.suggestion-count { color: var(--muted); font-size: .75rem; }

.spinner { width: 30px; height: 30px; border: 3px solid var(--border); border-top-color: var(--met-red); border-radius: 50%; animation: spin .65s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.error-msg { background: #fef2f2; border: 1px solid #fecaca; border-radius: 4px; padding: .48rem .7rem; font-size: .8rem; color: #991b1b; margin: .6rem 1rem; }

#lightbox { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.92); z-index: 100; align-items: center; justify-content: center; padding: 2rem; cursor: zoom-out; }
#lightbox.open { display: flex; }
.lb-close { position: fixed; top: 1rem; right: 1.25rem; font-size: 1.4rem; color: #fff; cursor: pointer; background: none; border: none; line-height: 1; z-index: 101; }
#lightbox img { max-width: 90vw; max-height: 90vh; object-fit: contain; border-radius: 2px; box-shadow: 0 8px 40px rgba(0,0,0,.6); cursor: default; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

.ac-wrap { position: relative; }
.ac-list { display: none; position: absolute; top: 100%; left: 0; right: 0; max-height: 260px; overflow-y: auto; background: #fff; border: 1.5px solid var(--border); border-top: none; border-radius: 0 0 4px 4px; list-style: none; z-index: 100; box-shadow: 0 4px 16px var(--shadow); }
.ac-list.open { display: block; }
.ac-item { padding: .45rem .65rem; cursor: pointer; font-size: .85rem; color: var(--text-secondary); transition: background .1s; }
.ac-item:hover, .ac-item.active { background: var(--bg-alt); }
.ac-item .ac-sci { color: var(--muted); font-size: .75rem; margin-left: .4rem; }
.ac-item .ac-sci-name { font-style: italic; color: var(--text-secondary); font-size: .72rem; margin-left: .4rem; }

.pagination { display: none; align-items: center; justify-content: center; gap: .35rem; padding: .6rem 1rem; border-top: 1px solid var(--border); background: var(--bg-alt); flex-shrink: 0; flex-wrap: wrap; }
.pagination.visible { display: flex; }
.pg-btn { min-width: 32px; height: 32px; padding: 0 .45rem; border: 1px solid var(--border); border-radius: 2px; background: var(--card-bg); color: var(--text-secondary); font-family: inherit; font-size: .8rem; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background .15s, border-color .15s; }
.pg-btn:hover:not(:disabled) { background: var(--bg-alt); border-color: var(--border-hover); }
.pg-btn:disabled { opacity: .35; cursor: default; }
.pg-btn.active { background: var(--met-red); color: #fff; border-color: var(--met-red); font-weight: 600; }
.pg-arrow { font-size: .9rem; font-weight: 700; }
.pg-dots { color: var(--muted); font-size: .8rem; padding: 0 .2rem; }

footer { text-align: center; padding: .75rem; font-size: .7rem; color: var(--muted); border-top: 1px solid var(--border); }
footer a { color: var(--muted); text-decoration: underline; }

/* ── Hide back button on desktop ──────────────────────────────── */
.detail-back-btn { display: none; }

/* ── Tablet (≤1024px) ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  main { grid-template-columns: 1fr 300px; }
  #art-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── Small tablet (≤768px) ────────────────────────────────────── */
@media (max-width: 768px) {
  header { padding: 1rem 1.25rem; min-height: 56px; flex-wrap: wrap; }
  .logo-tag { display: none; }
  .logo { grid-template-columns: auto; }
  .index-info { font-size: .65rem; }

  #setup { padding: .85rem 1.25rem; }

  main {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
  }

  #art-panel { border-right: none; }
  #art-grid { grid-template-columns: repeat(3, 1fr); }

  #detail-panel {
    position: fixed;
    inset: 0;
    z-index: 50;
    transform: translateX(100%);
    transition: transform .25s ease;
  }
  #detail-panel.mobile-open { transform: translateX(0); }

  .detail-back-btn {
    display: flex;
    align-items: center;
    gap: .35rem;
    background: none;
    border: none;
    font-family: inherit;
    font-size: .82rem;
    font-weight: 500;
    color: var(--met-red);
    cursor: pointer;
    padding: 0;
  }
  .detail-back-btn:hover { text-decoration: underline; }
}

/* ── Toast notifications ────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  max-width: 360px;
}
.toast {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem .85rem;
  border-radius: 6px;
  font-size: .8rem;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
  animation: toast-in .3s ease;
}
.toast-error { background: #991b1b; }
.toast-warning { background: #92400e; }
.toast-info { background: #1e3a5f; }
.toast-msg { flex: 1; }
.toast-close { background: none; border: none; color: rgba(255,255,255,.7); font-size: 1.1rem; cursor: pointer; padding: 0 .1rem; line-height: 1; }
.toast-close:hover { color: #fff; }
.toast-exit { opacity: 0; transition: opacity .3s; }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 500px) {
  header { padding: .85rem 1rem; min-height: 48px; }
  .logo-met, .logo-bird { font-size: 1.35rem; }
  .index-info { font-size: .6rem; }

  #setup { padding: .75rem 1rem; }
  .setup-row { flex-direction: column; gap: .5rem; align-items: stretch; }
  input[type="text"] { width: 100%; }
  #series-select { width: 100%; }
  .btn { width: 100%; }

  #art-grid { grid-template-columns: repeat(2, 1fr); gap: .6rem; padding: .75rem; }
  .art-info { padding: .4rem .5rem .5rem; }
  .art-name { font-size: .7rem; }
  .art-artist { font-size: .65rem; }
  .art-date { font-size: .62rem; }

  .pagination { padding: .5rem .75rem; gap: .25rem; }
  .pg-btn { min-width: 28px; height: 28px; font-size: .72rem; }

  footer { padding: .6rem .75rem; font-size: .62rem; }
}

/* ── Reduced motion ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .art-card { transition: none; }
  .art-card:hover { transform: none; }
  #detail-panel { transition: none; }
  .btn { transition: none; }
  .btn:active { transform: none; }
  input[type="text"] { transition: none; }
  #series-select { transition: none; }
  .logo-tag-link { transition: none; }
  .ac-item { transition: none; }
  .pg-btn { transition: none; }
  .spinner { animation: none; }
  .toast { animation: none; }
  .toast-exit { transition: none; }
}