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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background .3s, color .3s;
}

/* ===== Header / Top Bar ===== */
.top-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: transform .3s;
}
.top-bar.hidden { transform: translateY(-100%); }
.top-placeholder { width: 100%; }

.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 14px;
  padding: 12px 24px;
}

/* ===== Custom Select (shared) ===== */
.custom-select { position: relative; flex-shrink: 0; }

.custom-select-trigger {
  display: flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text-secondary);
  font-size: 14px; padding: 8px 16px;
  cursor: pointer; outline: none; white-space: nowrap;
  transition: border-color .2s, background .2s, box-shadow .2s;
  font-family: inherit;
}
.custom-select-trigger:hover {
  border-color: var(--accent); color: var(--text);
}
.custom-select.open .custom-select-trigger {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.cs-arrow {
  width: 0; height: 0;
  border-left: 4px solid transparent; border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform .2s;
  opacity: .5;
}
.custom-select.open .cs-arrow { transform: rotate(180deg); }

.custom-select-menu {
  position: absolute; top: calc(100% + 6px); left: 0;
  min-width: calc(100% + 20px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,.12);
  padding: 6px; z-index: 300;
  opacity: 0; transform: translateY(-6px) scale(.98);
  pointer-events: none;
  transition: opacity .18s cubic-bezier(.4,0,.2,1),
              transform .18s cubic-bezier(.4,0,.2,1);
}
.custom-select.open .custom-select-menu {
  opacity: 1; transform: translateY(0) scale(1); pointer-events: auto;
}

.custom-select-item {
  padding: 10px 16px; border-radius: 10px;
  font-size: 14px; color: var(--text-secondary);
  cursor: pointer; transition: background .12s, color .12s;
  white-space: nowrap;
}
.custom-select-item:hover { background: var(--input-bg); color: var(--text); }
.custom-select-item.active { color: var(--accent); font-weight: 600; }

/* ===== Dataset Switcher (prominent) ===== */
.dataset-switcher { flex-shrink: 0; }
.dataset-switcher .custom-select-trigger {
  border: 1px solid transparent; background: transparent;
  color: var(--text); font-size: 24px; font-weight: 700;
  padding: 4px 10px; border-radius: 10px;
  letter-spacing: 0.5px;
}
.dataset-switcher .custom-select-trigger:hover { background: var(--input-bg); }
.dataset-switcher .custom-select.open .custom-select-trigger {
  background: var(--input-bg); border-color: transparent;
  box-shadow: none;
}
.dataset-switcher .custom-select-menu { min-width: 200px; }
.dataset-switcher .custom-select-item { font-size: 17px; font-weight: 500; }

/* ===== Search ===== */
.search-box { flex: 1; max-width: 420px; position: relative; }
.search-box input {
  width: 100%; height: 40px;
  border: 1px solid var(--border); border-radius: 10px;
  padding: 0 16px 0 38px; font-size: 14px;
  background: var(--input-bg); color: var(--text); outline: none;
  transition: border-color .2s, background .2s, box-shadow .2s;
}
.search-box input:focus {
  border-color: var(--accent); background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.search-icon {
  position: absolute; left: 12px; top: 50%;
  transform: translateY(-50%); color: var(--text-muted);
}

.nav-right {
  flex-shrink: 0; display: flex; align-items: center; gap: 10px;
  margin-left: auto;
}

/* ===== Filter Toggle Button ===== */
.filter-toggle {
  display: flex; align-items: center; gap: 5px;
  padding: 8px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text-secondary); font-size: 13px; font-weight: 500;
  cursor: pointer; outline: none; font-family: inherit;
  transition: all .2s;
  white-space: nowrap;
}
.filter-toggle svg { flex-shrink: 0; }
.filter-toggle:hover {
  border-color: var(--accent); color: var(--accent);
}
.filter-toggle.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.filter-toggle.active svg { stroke: #fff; }

/* ===== Toolbar / Filter Panel ===== */
.toolbar {
  max-width: 1200px; margin: 0 auto;
  display: flex; flex-direction: column;
  padding: 0 24px;
  border-top: 1px solid var(--border-light);
  overflow: hidden;
  transition: max-height .3s cubic-bezier(.4,0,.2,1),
              opacity .2s ease, padding .3s;
  max-height: 500px; opacity: 1;
}
.toolbar.collapsed {
  max-height: 0; opacity: 0;
  border-top-color: transparent;
  padding-top: 0; padding-bottom: 0;
}

.filter-row {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 8px 0;
}
.filter-row + .filter-row {
  border-top: 1px solid var(--border-light);
}

.chip-group-label {
  font-size: 12px; color: var(--text-muted); line-height: 28px;
  margin-right: 4px; flex-shrink: 0; font-weight: 500;
}

/* ===== Range Sliders ===== */
.range-slider {
  flex: 1; max-width: 280px; height: 4px;
  -webkit-appearance: none; appearance: none;
  background: var(--border); border-radius: 2px;
  outline: none; margin: 0 10px; cursor: pointer;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 2px solid var(--surface);
  box-shadow: 0 1px 4px rgba(0,0,0,.15);
  transition: transform .15s;
}
.range-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.range-slider::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 2px solid var(--surface);
  box-shadow: 0 1px 4px rgba(0,0,0,.15);
}
.range-slider::-moz-range-track {
  height: 4px; background: var(--border); border-radius: 2px; border: none;
}
.range-value {
  font-size: 12px; color: var(--accent); font-weight: 600;
  white-space: nowrap; min-width: 56px; text-align: right;
}

.chip {
  flex-shrink: 0; padding: 4px 14px; border-radius: 14px;
  border: 1px solid var(--border); background: var(--surface);
  font-size: 12px; cursor: pointer;
  transition: all .2s cubic-bezier(.4, 0, .2, 1);
  white-space: nowrap; color: var(--text-secondary);
  user-select: none;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.chip.select-all { border-style: dashed; }
.chip.select-all.active { border-style: solid; }

/* ===== Main Content ===== */
.main {
  max-width: 1200px; margin: 0 auto;
  padding: 0 24px 40px;
}

.section-title {
  padding: 20px 0 4px; font-size: 18px; font-weight: 700;
  color: var(--text); letter-spacing: 0.3px;
}
.stats { padding: 0 0 8px; font-size: 13px; color: var(--text-muted); }

/* ===== Grid ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px; padding: 8px 0;
}

/* ===== Card ===== */
.card {
  background: var(--surface); border-radius: var(--radius-card); overflow: hidden;
  box-shadow: var(--card-shadow);
  cursor: pointer;
  transition: transform .3s cubic-bezier(.4, 0, .2, 1),
              box-shadow .3s cubic-bezier(.4, 0, .2, 1),
              opacity .4s ease;
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column; position: relative;
  opacity: 0; transform: translateY(20px);
}
.card.visible { opacity: 1; transform: translateY(0); }
.card.visible:hover {
  transform: translateY(-4px); box-shadow: var(--card-hover-shadow);
}

.card .badge {
  position: absolute; top: 10px; left: 10px;
  background: var(--badge-bg); color: #fff;
  font-size: 11px; font-weight: 700;
  min-width: 22px; height: 22px; padding: 0 5px;
  border-radius: 11px;
  display: flex; align-items: center; justify-content: center; z-index: 2;
  backdrop-filter: blur(8px);
}
.card .source-tag {
  position: absolute; top: 10px; right: 10px;
  padding: 3px 10px; border-radius: 10px;
  font-size: 11px; font-weight: 600; z-index: 2;
  backdrop-filter: blur(8px);
}
.source-tag.douban { background: var(--src-douban-bg); color: var(--src-douban-text); }
.source-tag.xhs    { background: var(--src-xhs-bg);    color: var(--src-xhs-text); }

.card .cover {
  height: 140px; display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 700; color: #fff; letter-spacing: 2px;
  position: relative; overflow: hidden;
}
.card .cover::before {
  content: ""; position: absolute; inset: 0;
  opacity: 0.12;
  background: radial-gradient(circle at 30% 50%, #fff, transparent 70%);
}
.cover.douban { background: var(--cover-douban); }
.cover.xhs    { background: var(--cover-xhs); }
.cover.has-img { background: var(--surface); }
.cover.has-img::before { display: none; }
.cover.has-img img {
  width: 100%; height: 100%; object-fit: cover;
}

.card .body {
  padding: 14px; flex: 1;
  display: flex; flex-direction: column; gap: 10px;
}
.card .title {
  font-size: 14px; font-weight: 600; line-height: 1.45; color: var(--text);
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}
.card .tags {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.tag {
  font-size: 11px; padding: 3px 8px; border-radius: 6px;
  background: var(--tag-bg); color: var(--text-muted); font-weight: 500;
}
.tag.price {
  background: var(--price-bg); color: var(--price-text); font-weight: 600;
}
.tag.location {
  background: var(--tag-bg); color: var(--accent); font-weight: 600;
}

.card .footer {
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
  padding: 10px 14px 12px; font-size: 11px; color: var(--text-muted);
  border-top: 1px solid var(--border-light);
}
.card .footer .nickname {
  color: var(--text-secondary); overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap; max-width: 50%; font-weight: 500;
}
.card .footer .meta {
  display: flex; align-items: center; gap: 6px;
  margin-left: auto;
}
.card .footer .time {
  color: var(--text-muted); font-size: 10px; opacity: 0.8;
  margin-left: auto;
}

.empty {
  grid-column: 1 / -1;
  text-align: center; padding: 60px 20px; color: var(--text-muted); font-size: 14px;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .nav-inner { padding: 10px 14px; gap: 8px; }
  .dataset-switcher .custom-select-trigger { font-size: 18px; }
  .search-box input { height: 36px; font-size: 13px; }
  .filter-toggle { padding: 7px 10px; font-size: 12px; }
  .toolbar { padding: 0 14px; }
  .main { padding: 0 14px 40px; }
  .grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .card .cover { height: 100px; font-size: 18px; }
  .card .body { padding: 10px; gap: 8px; }
  .card .title { font-size: 13px; }
  .tag { font-size: 10px; padding: 2px 6px; }
  .card .footer { padding: 8px 10px 10px; font-size: 10px; }
}