/* Component styles — spec references from CLAUDE.md / DESIGN-airtable.md.
   Default + Active states only; no hover states are defined (design system principle). */

/* top-nav */

.brand {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-ink);
}

.nav-link {
  font-size: 14px;
  color: var(--color-body);
}

.nav-link.is-active {
  color: var(--color-ink);
}

/* buttons */

.button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  border: none;
  border-radius: var(--radius-lg);
  padding: 16px 24px;
}

.button-primary:active {
  background-color: var(--color-primary-active);
}

.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-canvas);
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
}

.button-secondary:active {
  background-color: var(--color-surface-soft);
}

/* icon buttons — theme toggle + hamburger, per button-icon-circular spec (40x40) */

.button-icon-circular {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-canvas);
  color: var(--color-ink);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-full);
  padding: 0;
  flex-shrink: 0;
}

.button-icon-circular:active {
  background-color: var(--color-surface-soft);
}

.button-icon-circular svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: none;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: block;
  }
}

/* text link */

.text-link {
  color: var(--color-link);
  font-size: 14px;
}

.text-link:active {
  color: var(--color-link-active);
}

/* hero-band content */

.hero-title {
  color: var(--color-ink);
}

.hero-meta {
  margin-top: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* article-card */

.article-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  color: var(--color-ink);
}

.article-card:active {
  background-color: var(--color-surface-soft);
}

.article-card-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16px;
  color: var(--color-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.article-card-title {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-ink);
  margin-bottom: var(--space-xs);
}

.article-card-excerpt {
  font-size: 14px;
  line-height: 1.25;
  color: var(--color-body);
  flex: 1;
  margin-bottom: var(--space-sm);
}

.article-card-meta {
  font-size: 13px;
  color: var(--color-muted);
}

.article-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xxs);
  margin-top: var(--space-xs);
}

.tag-chip {
  font-size: 12px;
  color: var(--color-muted);
  background-color: var(--color-surface-soft);
  border-radius: var(--radius-xs);
  padding: 2px 8px;
}

.empty-state {
  color: var(--color-muted);
  padding: var(--space-xl) 0;
}

/* topic-filter-rail */

.topic-filter-rail {
  width: 100%;
  color: var(--color-body);
}

@media (min-width: 768px) {
  .topic-filter-rail {
    width: 240px;
    flex-shrink: 0;
  }
}

.filter-heading {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
}

.filter-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xxs);
}

.filter-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  padding: var(--space-xxs) 0;
  font-size: 14px;
  color: var(--color-body);
  text-align: left;
}

.filter-item.is-active {
  color: var(--color-ink);
  font-weight: 500;
}

.filter-count {
  font-size: 12px;
  color: var(--color-muted);
  background-color: var(--color-surface-soft);
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
  padding: 1px 6px;
}

.filter-item.is-active .filter-count {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

/* text-input / search */

.search-input {
  width: 100%;
  height: 44px;
  background-color: var(--color-canvas);
  color: var(--color-ink);
  font-size: 14px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: var(--space-lg);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-info-border);
}

/* footer */

.footer-text {
  font-size: 14px;
  color: var(--color-muted);
}