:root {
  --ink: #1B1F1D;
  --ink-soft: #3A3F3B;
  --muted: #6B6F6A;
  --paper: #FAFAF8;
  --paper-alt: #F1EFE9;
  --card: #FFFFFF;
  --border: #E3E0D6;
  --accent: #1F6F63;
  --accent-ink: #14453D;
  --accent-soft: #E4EFEC;
  --tag: #B5651D;
  --tag-soft: #F6E9DC;
  --danger: #A63D2F;
  --danger-soft: #F7E7E3;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 1px 2px rgba(27,31,29,0.06), 0 4px 14px rgba(27,31,29,0.06);
  --shadow-modal: 0 20px 60px rgba(27,31,29,0.25);
  --font-display: 'Source Serif 4', Georgia, serif;
  --font-ui: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: 0.95rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.hidden { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px;
  background: var(--paper);
  border-bottom: 1px solid var(--border);
}
.topbar-brand { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.brand-mark { width: 26px; height: 26px; border-radius: 7px; }
.brand-name { font-family: var(--font-display); font-weight: 600; font-size: 1.25rem; letter-spacing: 0.01em; }
.topbar-search { flex: 1; min-width: 0; }
.topbar-search input {
  width: 100%; padding: 9px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--paper-alt); color: var(--ink);
}
.topbar-search input::placeholder { color: var(--muted); font-family: var(--font-mono); font-size: 0.85rem; }
.topbar-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
#sort-select {
  border: 1px solid var(--border); background: var(--card); color: var(--ink-soft);
  padding: 8px 10px; border-radius: var(--radius-sm); font-size: 0.85rem;
}
.icon-btn {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); background: var(--card); border-radius: var(--radius-sm); color: var(--ink-soft);
}
.icon-btn svg rect { fill: currentColor; }
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }

.btn {
  padding: 9px 16px; border-radius: 999px; border: 1px solid transparent;
  font-size: 0.9rem; font-weight: 500;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); }
.btn-danger-ghost { background: var(--danger-soft); color: var(--danger); }
.btn-danger-ghost:hover { background: var(--danger); color: #fff; }
.text-btn { background: none; border: none; color: var(--accent); font-size: 0.85rem; padding: 4px 2px; }
.text-btn:hover { text-decoration: underline; }

/* ---------- Layout ---------- */
.layout { display: flex; align-items: flex-start; }
.sidebar {
  width: 240px; flex-shrink: 0; padding: 18px 14px; border-right: 1px solid var(--border);
  position: sticky; top: 61px; height: calc(100vh - 61px); overflow-y: auto;
}
.sidebar-section { margin-bottom: 22px; }
.sidebar-heading {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.06em;
  font-size: 0.7rem; color: var(--muted); margin-bottom: 8px; padding: 0 8px;
}
.sidebar-list { display: flex; flex-direction: column; gap: 2px; }
.sidebar-link {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  text-align: left; background: none; border: none; padding: 7px 8px; border-radius: var(--radius-sm);
  color: var(--ink-soft); font-size: 0.9rem;
}
.sidebar-link:hover { background: var(--paper-alt); }
.sidebar-link.is-active { background: var(--accent-soft); color: var(--accent-ink); font-weight: 500; }
.sidebar-tags .sidebar-link { font-family: var(--font-mono); font-size: 0.8rem; }
.export-wrap { display: flex; gap: 10px; padding: 6px 8px 0; }

.content { flex: 1; min-width: 0; padding: 20px; }
.active-filter-bar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
  font-size: 0.85rem; color: var(--muted);
}
.active-filter-bar span { font-family: var(--font-mono); }

.empty-state { text-align: center; padding: 80px 20px; color: var(--muted); }
.empty-state-title { font-family: var(--font-display); font-size: 1.3rem; color: var(--ink); margin: 0 0 6px; }
.empty-state-body { margin: 0; }

/* ---------- Item grid / cards ---------- */
.items-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}
.items-grid.is-list { grid-template-columns: 1fr; gap: 10px; }

.item-card {
  position: relative; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card);
  display: flex; flex-direction: column;
}
/* Signature: a small folded "dog-ear" tab in the accent color - a nod to a
   physical catalog card corner - colored per primary collection if any. */
.item-card::before {
  content: ''; position: absolute; top: 0; right: 0; width: 0; height: 0;
  border-style: solid; border-width: 0 26px 26px 0; border-color: transparent var(--accent) transparent transparent;
  opacity: 0.9; z-index: 2;
}
.item-card.no-collection::before { display: none; }

.item-card-thumb { position: relative; aspect-ratio: 1 / 1; background: var(--paper-alt); overflow: hidden; }
.item-card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.item-card-thumb .no-image { display: flex; align-items: center; justify-content: center; height: 100%; color: var(--muted); font-family: var(--font-mono); font-size: 0.75rem; }

.price-tag {
  position: absolute; left: 10px; bottom: -6px; transform: rotate(-4deg);
  background: var(--tag-soft); color: var(--tag); border: 1px solid var(--tag);
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 500;
  padding: 3px 9px; border-radius: 4px; z-index: 3;
}

.item-card-body { padding: 14px 12px 12px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.item-card-title {
  font-family: var(--font-display); font-size: 1rem; font-weight: 600; line-height: 1.25;
  margin: 0; color: var(--ink);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.item-card-meta { display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); }
.status-pill { padding: 2px 8px; border-radius: 999px; background: var(--paper-alt); }
.status-pill.status-bought { background: var(--accent-soft); color: var(--accent-ink); }
.status-pill.status-gave_up { background: var(--danger-soft); color: var(--danger); }

.item-card-actions { display: flex; gap: 6px; margin-top: auto; padding-top: 8px; }
.item-card-actions button {
  flex: 1; border: 1px solid var(--border); background: var(--paper); border-radius: var(--radius-sm);
  padding: 6px 4px; font-size: 0.72rem; color: var(--ink-soft); display: flex; align-items: center; justify-content: center; gap: 4px;
}
.item-card-actions button:hover { border-color: var(--accent); color: var(--accent); }
.item-card-actions .is-pinned { color: var(--tag); border-color: var(--tag); }

/* List view row layout */
.items-grid.is-list .item-card { flex-direction: row; }
.items-grid.is-list .item-card::before { display: none; }
.items-grid.is-list .item-card-thumb { width: 88px; aspect-ratio: 1/1; flex-shrink: 0; }
.items-grid.is-list .item-card-body { flex-direction: row; align-items: center; gap: 14px; padding: 10px 14px; }
.items-grid.is-list .item-card-title { -webkit-line-clamp: 1; flex: 1; }
.items-grid.is-list .item-card-meta { flex-shrink: 0; }
.items-grid.is-list .item-card-actions { margin-top: 0; width: auto; flex-shrink: 0; }
.items-grid.is-list .price-tag { position: static; transform: none; margin-right: 8px; }

/* ---------- Modals ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(27,31,29,0.45); z-index: 50;
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal {
  position: relative; background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow-modal); max-width: 720px; width: 100%; max-height: 90vh; overflow-y: auto;
  padding: 24px;
}
.modal-small { max-width: 380px; }
.modal-close {
  position: absolute; top: 12px; right: 14px; background: none; border: none;
  font-size: 1.4rem; color: var(--muted); line-height: 1;
}
.modal-close:hover { color: var(--ink); }

.modal-item-body { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 720px) {
  .modal-item-body { grid-template-columns: 300px 1fr; }
}
.gallery-main { aspect-ratio: 1/1; background: var(--paper-alt); border-radius: var(--radius-sm); overflow: hidden; }
.gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumbs { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.gallery-thumbs img { width: 48px; height: 48px; object-fit: cover; border-radius: 6px; border: 2px solid transparent; cursor: pointer; }
.gallery-thumbs img.is-active { border-color: var(--accent); }

.review-banner { background: var(--accent-soft); color: var(--accent-ink); padding: 10px 12px; border-radius: var(--radius-sm); margin-bottom: 12px; font-size: 0.9rem; }

.field-label { display: block; font-size: 0.78rem; color: var(--muted); margin-bottom: 12px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.04em; }
.field-label input, .field-label textarea, .field-label select {
  display: block; width: 100%; margin-top: 5px; padding: 9px 11px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--paper); color: var(--ink); font-family: var(--font-ui);
  text-transform: none; letter-spacing: normal; font-size: 0.95rem;
}
.field-row { display: flex; gap: 12px; }
.field-row .field-label { flex: 1; }
.field-checkbox { display: flex; align-items: center; gap: 8px; flex-direction: row-reverse; justify-content: flex-end; }
.field-checkbox input { width: auto; margin: 0; }

.chip-picker { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--border); font-size: 0.8rem; color: var(--ink-soft); background: var(--paper);
}
.chip.is-selected { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-ink); }
.chip.is-suggested { border-style: dashed; border-color: var(--tag); color: var(--tag); }
.chip-list { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-remove { border: none; background: none; color: inherit; font-size: 0.9rem; line-height: 1; padding: 0; margin-left: 2px; }
.chip-input-row input { border: none; background: none; padding: 4px; width: auto; flex: 1; min-width: 100px; }

.field-meta { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); margin: 4px 0 16px; }

.modal-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; gap: 10px; flex-wrap: wrap; }
.modal-actions-right { display: flex; gap: 8px; }

/* Add-item modal */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tab-btn { background: none; border: none; padding: 8px 12px; font-size: 0.88rem; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab-btn.is-active { color: var(--accent-ink); border-color: var(--accent); font-weight: 500; }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }
.bulk-results { margin-top: 14px; font-family: var(--font-mono); font-size: 0.78rem; display: flex; flex-direction: column; gap: 4px; }
.bulk-results .ok { color: var(--accent-ink); }
.bulk-results .fail { color: var(--danger); }

.duplicate-preview { display: flex; gap: 12px; align-items: center; background: var(--paper-alt); padding: 10px; border-radius: var(--radius-sm); margin: 14px 0; }
.duplicate-preview img { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; }
.modal-duplicate-title { font-size: 0.95rem; margin: 6px 0 0; }

/* ---------- Toasts ---------- */
.toast-stack { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 999px; font-size: 0.85rem;
  box-shadow: var(--shadow-card);
}
.toast.toast-error { background: var(--danger); }

/* ---------- Responsive ---------- */
@media (max-width: 899px) {
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%; height: auto; position: static; border-right: none; border-bottom: 1px solid var(--border);
    display: flex; flex-direction: row; overflow-x: auto; padding: 10px 12px; gap: 18px;
  }
  .sidebar-section { margin-bottom: 0; flex-shrink: 0; }
  .sidebar-list { flex-direction: row; }
  .topbar { flex-wrap: wrap; }
  .topbar-search { order: 3; flex-basis: 100%; }
}
@media (max-width: 520px) {
  .topbar-actions #sort-select { display: none; }
  .items-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
}