/* =============================================================================
   Too Many Cooks — blog design system.
   Built on the site tokens in styles.css (colour, type, space, motion), so it
   follows light and dark mode. Components: eyebrow, chip, byline, post cover,
   post card, post grid, post page, author card, CTA band, reading progress.
   Motion is short and subtle and switches off for reduced motion.
   ============================================================================= */

:root {
  --blog-radius: 6px;
  --blog-lift: -4px;
  --blog-ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --blog-rise: 520ms;
  --blog-stagger: 80ms;
  --blog-measure: 700px;
  --blog-card-shadow: 0 18px 40px -24px rgba(26, 26, 26, 0.35);
  --blog-dot: rgba(26, 26, 26, 0.12);
}

[data-theme="dark"] {
  --blog-card-shadow: 0 18px 40px -20px rgba(0, 0, 0, 0.7);
  --blog-dot: rgba(232, 226, 218, 0.1);
}

/* ---------- Motion ---------- */
@keyframes blog-rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@keyframes blog-spin {
  to { transform: translate(-50%, -50%) rotate(405deg); }
}

.reveal,
.post-card {
  animation: blog-rise var(--blog-rise) var(--blog-ease) both;
  animation-delay: calc(var(--i, 0) * var(--blog-stagger));
}

/* ---------- Atoms ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--accent);
  border-radius: var(--radius-full);
  background: var(--accent-wash);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base);
}

.chip::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

a.chip:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.back-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition-base), transform var(--transition-base);
}

.back-link:hover {
  color: var(--accent);
  transform: translateX(-3px);
}

/* ---------- Byline ---------- */
.byline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.byline-avatar {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--copper-light), var(--copper-dim));
  color: var(--chalk);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.byline-avatar-large {
  width: 56px;
  height: 56px;
  font-size: var(--text-base);
}

.byline-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.byline-name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.byline-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ---------- Post cover (header image or placeholder) ---------- */
.post-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.post-cover > img:not(.post-cover-logo) {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--blog-ease);
}

.post-cover-placeholder {
  background:
    radial-gradient(var(--blog-dot) 1.2px, transparent 1.4px) 0 0 / 18px 18px,
    radial-gradient(70% 90% at 15% 20%, var(--accent-wash-strong), transparent 70%),
    radial-gradient(60% 80% at 90% 90%, rgba(59, 155, 143, 0.16), transparent 70%),
    var(--bg-secondary);
}

.post-cover-ring,
.post-cover-diamond {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid var(--border-strong);
  opacity: 0.6;
  transition: transform 900ms var(--blog-ease), border-color var(--transition-slow);
}

.post-cover-ring {
  width: 62%;
  aspect-ratio: 1;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.post-cover-diamond {
  width: 42%;
  aspect-ratio: 1;
  transform: translate(-50%, -50%) rotate(45deg);
}

.post-cover-logo {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22%;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.35));
  transition: transform 600ms var(--blog-ease);
}

.post-cover-label {
  position: absolute;
  left: var(--space-4);
  bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
}

/* ---------- Post card ---------- */
.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-color);
  border-radius: var(--blog-radius);
  background: var(--bg-primary);
  overflow: hidden;
  transition:
    transform var(--transition-slow) var(--blog-ease),
    border-color var(--transition-base),
    box-shadow var(--transition-slow);
}

.post-card:hover,
.post-card:focus-within {
  transform: translateY(var(--blog-lift));
  border-color: var(--accent);
  box-shadow: var(--blog-card-shadow);
}

.post-card:hover .post-cover-logo { transform: translate(-50%, -50%) scale(1.06); }
.post-card:hover .post-cover > img:not(.post-cover-logo) { transform: scale(1.04); }
.post-card:hover .post-cover-ring { transform: translate(-50%, -50%) scale(1.05); border-color: var(--accent); }
.post-card:hover .post-cover-diamond { transform: translate(-50%, -50%) rotate(90deg); }

.post-card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-6);
}

.post-card-title {
  font-size: var(--text-xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

.post-card-title a {
  color: var(--text-primary);
  text-decoration: none;
  background: linear-gradient(var(--accent), var(--accent)) 0 100% / 0 2px no-repeat;
  transition: background-size var(--transition-slow) var(--blog-ease), color var(--transition-base);
}

/* The whole card is the link. */
.post-card-title a::after {
  content: '';
  position: absolute;
  inset: 0;
}

.post-card:hover .post-card-title a {
  color: var(--accent);
  background-size: 100% 2px;
}

.post-card-title a:focus-visible {
  outline: none;
}

.post-card:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.post-card-excerpt {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  margin: 0;
}

.post-card .byline {
  margin-top: auto;
  padding-top: var(--space-2);
}

/* ---------- Grid ---------- */
.blog-index {
  padding: var(--space-16) 0 var(--space-20);
}

.blog-index-header {
  max-width: var(--blog-measure);
  margin-bottom: var(--space-12);
}

.blog-index-header h1 {
  font-size: var(--text-5xl);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-3);
}

.blog-index-lede {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-8);
}

/* The newest post leads, cover beside it, across the whole row. */
@media (min-width: 900px) {
  .post-card-featured {
    grid-column: 1 / -1;
    flex-direction: row;
  }

  .post-card-featured .post-cover {
    flex: 0 0 55%;
    aspect-ratio: auto;
    min-height: 320px;
  }

  .post-card-featured .post-card-body {
    justify-content: center;
    padding: var(--space-10);
  }

  .post-card-featured .post-card-title {
    font-size: var(--text-3xl);
  }

  .post-card-featured .post-card-excerpt {
    font-size: var(--text-base);
  }
}

/* ---------- Post page ---------- */
.blog-post {
  padding: var(--space-12) 0 var(--space-16);
}

.blog-post-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
  max-width: var(--blog-measure);
  margin: 0 auto var(--space-10);
}

.blog-post-header h1 {
  font-size: var(--text-5xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

.blog-post-lede {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  margin: 0;
}

.blog-post-cover {
  max-width: 960px;
  margin: 0 auto var(--space-12);
  border: 1px solid var(--border-color);
  border-radius: var(--blog-radius);
  overflow: hidden;
  --i: 1;
}

.blog-post-cover .post-cover {
  aspect-ratio: 21 / 9;
}

.blog-post-cover .post-cover-logo {
  width: 12%;
}

.blog-post-cover .post-cover-ring {
  width: 34%;
  animation: blog-spin 2.4s var(--blog-ease) both;
}

.blog-post-cover .post-cover-diamond {
  width: 24%;
}

.blog-post-content {
  max-width: var(--blog-measure);
  margin-inline: auto;
  font-size: var(--text-lg);
  line-height: 1.75;
  color: var(--text-secondary);
}

.blog-post-content > * + * {
  margin-top: var(--space-5);
}

.blog-post-content h2 {
  margin-top: var(--space-12);
  font-size: var(--text-2xl);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.blog-post-content h2::before {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  margin-bottom: var(--space-4);
  background: var(--accent);
}

.blog-post-content strong {
  color: var(--text-primary);
}

.blog-post-content ul {
  padding-left: 0;
  list-style: none;
}

.blog-post-content li {
  position: relative;
  padding-left: var(--space-6);
}

.blog-post-content li + li {
  margin-top: var(--space-2);
}

.blog-post-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  background: var(--accent);
  transform: rotate(45deg);
}

.blog-post-content a {
  color: var(--accent);
  text-underline-offset: 3px;
  transition: color var(--transition-base);
}

.blog-post-content a:hover {
  color: var(--accent-light);
}

.blog-post-content pre {
  font-size: var(--text-sm);
}

/* ---------- Post footer: author, CTA ---------- */
.blog-post-footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  max-width: var(--blog-measure);
  margin: var(--space-16) auto 0;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-color);
}

.author-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.author-card p {
  margin: 0;
}

.author-card-name a {
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}

.author-card-name a:hover {
  color: var(--accent);
}

.author-card-role {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.cta-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6);
  border: 1px solid var(--accent);
  border-radius: var(--blog-radius);
  background: var(--accent-wash);
}

.cta-band p {
  margin: 0;
  font-weight: 600;
  color: var(--text-primary);
}

.cta-band-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- Reading progress (scroll-driven where supported) ---------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform-origin: 0 50%;
  transform: scaleX(0);
}

@supports (animation-timeline: scroll()) {
  @keyframes blog-progress {
    to { transform: scaleX(1); }
  }

  .read-progress {
    animation: blog-progress linear both;
    animation-timeline: scroll(root);
  }
}

/* ---------- Small screens ---------- */
@media (max-width: 768px) {
  .blog-index-header h1,
  .blog-post-header h1 {
    font-size: var(--text-4xl);
  }

  .blog-post-content {
    font-size: var(--text-base);
  }

  .post-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .post-card,
  .blog-post-cover .post-cover-ring {
    animation: none;
  }

  .post-card,
  .post-card *,
  .back-link {
    transition: none;
  }

  .post-card:hover {
    transform: none;
  }

  .read-progress {
    display: none;
  }
}