html, body { height: 100%; margin: 0; }
body {
  background: var(--surface);
  background-image: url('bg-texture.png');
  background-size: cover;
  background-position: center;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
}

.page-body {
  flex: 1;
  display: flex;
  gap: 24px;
  padding: 24px 32px 48px;
  align-items: flex-start;
}

.left-panel { width: 260px; flex-shrink: 0; display: flex; flex-direction: column; }

.hero-block {
  display: flex; flex-direction: column; gap: 10px;
  padding-bottom: 20px;
  border-bottom: 1px dashed rgba(244,128,93,0.25);
  margin-bottom: 4px;
}
.hero-path { font: 400 11px/1 var(--font-mono); color: var(--fg-muted); letter-spacing: 0.04em; }
.hero-path span { color: var(--brand); }
.hero-title { font: 700 28px/1.1 var(--font-mono); color: var(--fg-primary); }
.hero-title em { color: var(--brand); font-style: normal; }
.hero-desc { font: 400 12px/1.6 var(--font-mono); color: var(--fg-secondary); }
.hero-stats { display: flex; gap: 20px; padding-top: 2px; }
.hero-stat-val { font: 700 16px/1 var(--font-mono); color: var(--success); }
.hero-stat-lbl { font: 400 10px/1 var(--font-mono); color: var(--fg-muted); margin-top: 4px; letter-spacing: 0.04em; }

.search-wrap { padding: 16px 0 4px; }
.search-bar { background: var(--bg-chip); height: 32px; display: flex; align-items: center; padding: 0 12px; gap: 8px; }
.search-bar.focused { outline: 1px solid var(--brand); }
.search-prompt { font: 400 12px/1 var(--font-mono); color: var(--brand); flex-shrink: 0; }
.search-input {
  flex: 1; background: transparent; border: none; outline: none;
  font: 400 12px/1 var(--font-mono); color: var(--fg-primary);
  padding: 0; caret-color: var(--brand);
}
.search-input::placeholder { color: var(--slate-400); }

.filters { display: flex; flex-direction: column; padding-top: 8px; }
.filter-group { border-bottom: 1px dashed rgba(244,128,93,0.2); }
.filter-toggle {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; background: none; border: none; cursor: pointer;
  padding: 10px 0; font: 700 10px/1 var(--font-mono); color: var(--fg-muted);
  letter-spacing: 0.1em; text-transform: uppercase; transition: color 200ms ease;
}
.filter-toggle:hover { color: var(--brand); }
.filter-toggle-chevron {
  width: 16px; height: 16px; background: currentColor;
  -webkit-mask-image: url('icons/chevron-down.svg'); mask-image: url('icons/chevron-down.svg');
  -webkit-mask-size: contain; mask-size: contain;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-position: center; mask-position: center;
  flex-shrink: 0; transition: transform 200ms ease;
}
.filter-group.collapsed .filter-toggle-chevron { transform: rotate(-90deg); }
.filter-items { display: flex; flex-direction: column; padding-bottom: 6px; }
.filter-group.collapsed .filter-items { display: none; }

.filter-item {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 6px 5px 8px; font: 400 12px/1 var(--font-mono); color: var(--fg-secondary);
  cursor: pointer; width: 100%;
  transition: color 200ms ease, background 200ms ease;
  user-select: none;
}
.filter-item:hover { color: var(--fg-primary); background: rgba(244,128,93,0.04); }

/* hide native checkbox */
.filter-checkbox { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }

/* custom checkbox box */
.filter-check {
  width: 12px; height: 12px; flex-shrink: 0;
  border: 1px solid var(--slate-600);
  background: transparent;
  display: flex; align-items: center; justify-content: center;
  transition: all 60ms steps(1);
  position: relative;
}
/* tick mark */
.filter-check::after {
  content: '';
  display: block;
  width: 6px; height: 3px;
  border-left: 1.5px solid var(--bg-base);
  border-bottom: 1.5px solid var(--bg-base);
  transform: rotate(-45deg) translate(0px, -1px);
  opacity: 0;
}

.filter-item:hover .filter-check { border-color: var(--brand); }

.filter-checkbox:checked ~ .filter-check {
  background: var(--brand);
  border-color: var(--brand);
}
.filter-checkbox:checked ~ .filter-check::after { opacity: 1; }

.filter-item:has(.filter-checkbox:checked) { color: var(--brand); }

.filter-label { flex: 1; }
.filter-badge { font: 400 12px/1 var(--font-mono); color: var(--fg-muted); flex-shrink: 0; margin-left: auto; }
.filter-item:has(.filter-checkbox:checked) .filter-badge { color: var(--brand); opacity: 0.7; }

.main-wrap { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.content-box {
  position: relative; border: 1px dashed var(--brand);
  background: var(--bg-base); display: flex; flex-direction: column; flex: 1;
}
.content-titlebar {
  height: 28px; min-height: 28px; border-bottom: 1px solid var(--brand);
  display: flex; align-items: center; gap: 16px; padding: 0 16px; flex-shrink: 0;
}
.content-title { font: 400 12px/1 var(--font-mono); color: var(--slate-500); flex: 1; }
.content-body { padding: 20px 24px 40px; overflow-y: auto; flex: 1; }

.sort-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.result-count { font: 400 11px/1 var(--font-mono); color: var(--fg-muted); }
.result-count span { color: var(--success); }
.sort-group { display: flex; align-items: center; gap: 6px; font: 400 11px/1 var(--font-mono); color: var(--fg-muted); }
.sort-btn {
  font: 400 11px/1 var(--font-mono); color: var(--fg-secondary);
  background: none; border: 1px dashed transparent; padding: 3px 7px;
  cursor: pointer; transition: all 60ms steps(1);
}
.sort-btn:hover { border-color: var(--orange-ash); color: var(--brand); }
.sort-btn.active { color: var(--brand); border: 1px solid var(--orange-500); }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }

.tcard {
  border: 1px solid var(--bg-chip); background: var(--bg-elevated);
  display: flex; flex-direction: column; position: relative;
  cursor: pointer; transition: border-color 100ms steps(2), background 100ms steps(2);
  text-decoration: none;
}
.tcard:hover { border-color: var(--slate-600); background: rgba(244,128,93,0.04); }
.card-body { padding: 20px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-title { font: 700 14px/1.35 var(--font-mono); color: var(--fg-primary); letter-spacing: 0.02em; }
.card-desc { font: 400 12px/1.55 var(--font-mono); color: var(--fg-muted); }
.card-tags { display: flex; flex-wrap: wrap; gap: 4px; margin: 10px 0; }
.tag {
  font: 400 10px/1 var(--font-mono); color: var(--fg-secondary);
  border: 1px solid var(--bg-chip); background: var(--bg-chip-alt);
  padding: 3px 7px; letter-spacing: 0.02em;
}
.tag.orange { color: var(--brand); border-color: var(--orange-ash); background: rgba(57,41,29,0.6); }
.tag.green  { color: var(--success); border-color: rgba(52,211,153,0.25); background: rgba(4,120,87,0.15); }
.tag.yellow { color: var(--hint); border-color: rgba(253,224,71,0.2); background: rgba(253,224,71,0.07); }
.tag.red { color: rgba(233,0,0,0.6); border-color: rgba(174,1,15,0.2); background: rgba(174,1,15,0.07); }

.card-connection { font: 400 10px/1 var(--font-mono); color: var(--fg-muted); padding-top: 2px; }
.card-connection span { color: var(--fg-secondary); }
.card-foot {
  border-top: 1px dashed rgba(244,128,93,0.2); padding: 12px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.card-meta { display: flex; align-items: center; gap: 10px; }
.card-author-avatar {
  display: block; width: 36px; height: 36px; object-fit: cover;
  border: 1px dashed var(--brand); background: var(--bg-elevated); flex-shrink: 0;
  padding: 2px;
}
.card-author-avatar img { width: 30px; height: 30px; }
.card-author-info { display: flex; flex-direction: column; gap: 3px; }
.card-author-label { font: 400 10px/1 var(--font-mono); color: var(--fg-muted); }
.card-author-name { font: 700 11px/1 var(--font-mono); color: var(--fg-primary); }
.card-author { font: 400 10px/1 var(--font-mono); color: var(--fg-muted); }
.card-author span { color: var(--fg-secondary); }
.card-uses { font: 400 10px/1 var(--font-mono); color: var(--fg-muted); opacity: 0.7; }
.card-use-btn {
  font: 400 12px/1 var(--font-mono); color: var(--bg-base);
  background: var(--brand); border: none; padding: 5px 12px;
  cursor: pointer; flex-shrink: 0; transition: background 60ms steps(1);
  display: flex; align-items: center; gap: 4px;
}
.card-use-btn:hover { background: var(--orange-tint); }

.empty-state { padding: 60px 0; text-align: center; display: none; }
.empty-state.shown { display: block; }
.empty-title { font: 700 14px/1 var(--font-mono); color: var(--brand); margin-bottom: 8px; }
.empty-sub { font: 400 12px/1.5 var(--font-mono); color: var(--fg-muted); }

::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--orange-ash); }
::-webkit-scrollbar-thumb:hover { background: var(--orange-500); }

@media (max-width: 900px) {
  .page-body { padding: 16px; gap: 16px; }
  .left-panel { width: 200px; }
  .card-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .page-body { flex-direction: column; padding: 12px; gap: 12px; }
  .left-panel { width: 100%; }
  .hero-title { font-size: 22px; }
  .card-grid { grid-template-columns: 1fr; }
}