/* Project category filter chips */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.filter-chip {
  font-family: inherit;
  cursor: pointer;
  font-size: 0.75rem;
  padding: 8px 14px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: 3px;
  background: color-mix(in srgb, var(--surface0) 50%, transparent);
  color: var(--subtext0);
  border: 1px solid var(--surface1);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

@media (hover: hover) {
  .filter-chip:hover {
    color: var(--text);
    border-color: var(--surface2);
  }
}

.filter-chip[aria-pressed="true"] {
  color: var(--text);
  border-color: var(--surface2);
  background: color-mix(in srgb, var(--surface0) 80%, transparent);
}

.filter-chip[aria-pressed="true"][data-category="security"] { color: var(--red); border-color: color-mix(in srgb, var(--red) 40%, transparent); background: color-mix(in srgb, var(--red) 15%, transparent); }
.filter-chip[aria-pressed="true"][data-category="ai"] { color: var(--yellow); border-color: color-mix(in srgb, var(--yellow) 40%, transparent); background: color-mix(in srgb, var(--yellow) 15%, transparent); }
.filter-chip[aria-pressed="true"][data-category="ml"] { color: var(--mauve); border-color: color-mix(in srgb, var(--mauve) 40%, transparent); background: color-mix(in srgb, var(--mauve) 15%, transparent); }
.filter-chip[aria-pressed="true"][data-category="eng"] { color: var(--green); border-color: color-mix(in srgb, var(--green) 40%, transparent); background: color-mix(in srgb, var(--green) 15%, transparent); }
.filter-chip[aria-pressed="true"][data-category="tools"] { color: var(--teal); border-color: color-mix(in srgb, var(--teal) 40%, transparent); background: color-mix(in srgb, var(--teal) 15%, transparent); }
.filter-chip[aria-pressed="true"][data-category="lang"] { color: var(--blue); border-color: color-mix(in srgb, var(--blue) 40%, transparent); background: color-mix(in srgb, var(--blue) 15%, transparent); }

.project-entry.filtered-out {
  display: none;
}

/* Projects - collapsible groups */
.project-group-header {
  appearance: none;
  background: none;
  border: none;
  font: inherit;
  text-align: left;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  cursor: pointer;
  user-select: none;
  color: var(--blue);
  font-weight: 600;
}

.project-group-header:hover {
  color: var(--lavender);
}

.project-group-header .chevron {
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.project-group-header.open .chevron {
  transform: rotate(90deg);
}

.project-group-header .hint {
  color: var(--overlay0);
  font-size: 0.75rem;
  font-weight: 400;
}

.project-group {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}

.project-group.open {
  grid-template-rows: 1fr;
}

.project-group-inner {
  overflow: hidden;
}

.project-entry {
  margin-bottom: 16px;
  padding: 12px 16px;
}

.project-name {
  color: var(--mauve);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.project-name .icon {
  color: var(--mauve);
}

.project-name a {
  color: var(--mauve);
}

.project-name a:hover {
  color: var(--pink);
}

.project-meta {
  color: var(--overlay1);
  font-size: 0.82rem;
  margin: 4px 0;
}

.project-grade {
  color: var(--green);
  font-weight: 600;
}

.project-desc {
  color: var(--subtext0);
  font-size: 0.9rem;
  margin-top: 4px;
}

.project-tags {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.project-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--blue) 10%, transparent);
  color: var(--blue);
  border: 1px solid color-mix(in srgb, var(--blue) 20%, transparent);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

@media (hover: hover) {
  .project-tag:hover {
    background: color-mix(in srgb, var(--blue) 20%, transparent);
    border-color: color-mix(in srgb, var(--blue) 40%, transparent);
    transform: translateY(-1px);
  }
}

.project-tag[data-category="security"] {
  background: color-mix(in srgb, var(--red) 10%, transparent);
  color: var(--red);
  border-color: color-mix(in srgb, var(--red) 20%, transparent);
}

.project-tag[data-category="ml"] {
  background: color-mix(in srgb, var(--mauve) 10%, transparent);
  color: var(--mauve);
  border-color: color-mix(in srgb, var(--mauve) 20%, transparent);
}

.project-tag[data-category="tools"] {
  background: color-mix(in srgb, var(--teal) 10%, transparent);
  color: var(--teal);
  border-color: color-mix(in srgb, var(--teal) 20%, transparent);
}

.project-tag[data-category="eng"] {
  background: color-mix(in srgb, var(--green) 10%, transparent);
  color: var(--green);
  border-color: color-mix(in srgb, var(--green) 20%, transparent);
}

.project-tag[data-category="ai"] {
  background: color-mix(in srgb, var(--yellow) 10%, transparent);
  color: var(--yellow);
  border-color: color-mix(in srgb, var(--yellow) 20%, transparent);
}