:root {
  color-scheme: light;
  --bg: #f8faf7;
  --panel: #ffffff;
  --text: #202124;
  --muted: #626a73;
  --line: #d7ddd7;
  --accent: #0f766e;
  --accent-strong: #0f4f47;
  --accent-soft: #e4f4ef;
  --code: #edf4f2;
  --shadow: 0 18px 48px rgba(32, 33, 36, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent-strong);
}

.site-header,
.site-footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a:hover,
.brand:hover,
.post-list a:hover {
  color: var(--accent-strong);
}

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px;
}

.hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: 0;
  text-wrap: balance;
}

h2 {
  margin-top: 40px;
  font-size: 1.38rem;
  line-height: 1.25;
}

p,
li {
  max-width: 760px;
}

.lede {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.15rem;
}

.profile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: center;
  gap: 40px;
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.profile-copy h1,
.profile-copy h2 {
  margin-top: 0;
}

.profile-name {
  font-size: clamp(1.85rem, 3.8vw, 2.55rem);
}

.profile-photo-frame {
  justify-self: end;
  width: min(260px, 100%);
  aspect-ratio: 1;
  padding: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: var(--shadow);
}

.profile-photo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 4px solid var(--panel);
  border-radius: 50%;
}

.post-list {
  display: grid;
  gap: 16px;
  margin: 28px 0;
  padding: 0;
  list-style: none;
}

.post-list li {
  max-width: none;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.post-list a {
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
}

.post-header {
  padding: 48px 0 24px;
  border-bottom: 1px solid var(--line);
}

.post-body,
.post-frame {
  padding-top: 24px;
}

.post-frame {
  display: grid;
  grid-template-columns: minmax(0, 760px) 220px;
  gap: 56px;
  align-items: start;
}

.post-content {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
}

.post-content h2 {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.post-content h3 {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.post-content hr {
  max-width: 760px;
  margin: 36px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.article-toc {
  grid-column: 2;
  grid-row: 1;
  position: sticky;
  top: 24px;
  padding: 14px 0 14px 18px;
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.toc-title {
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-toc ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-toc li {
  margin: 0;
}

.article-toc a {
  display: block;
  color: var(--muted);
  line-height: 1.3;
  text-decoration: none;
}

.article-toc a:hover {
  color: var(--accent-strong);
}

.article-toc ul ul {
  gap: 6px;
  margin-top: 7px;
  padding-left: 14px;
  font-size: 0.86rem;
}

.problem-box {
  max-width: 760px;
  margin: 24px 0;
  padding: 18px 20px;
  background: #f1f7f5;
  border: 1px solid #c9ded8;
  border-left: 5px solid var(--accent);
  border-radius: 8px;
}

.problem-box p {
  margin: 0 0 12px;
}

.problem-box p:last-child {
  margin-bottom: 0;
}

.problem-box strong {
  color: var(--accent-strong);
}

.need-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: 760px;
  margin: 24px 0;
}

.need-card,
.pieces-table {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(32, 33, 36, 0.06);
}

.need-card {
  padding: 18px;
  text-align: center;
}

.need-card p {
  margin: 0 0 10px;
}

.need-card p:last-child {
  margin-bottom: 0;
}

.need-card strong {
  color: var(--accent-strong);
}

.pieces-table {
  width: 100%;
  max-width: 760px;
  margin: 24px 0;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
}

.pieces-table th,
.pieces-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.pieces-table th {
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.pieces-table td:first-child {
  width: 38%;
  color: var(--accent-strong);
  font-weight: 800;
}

.pieces-table td:last-child {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.pieces-table tr:last-child td {
  border-bottom: 0;
}

.piece-row {
  padding: 12px 0;
}

.piece-row + .piece-row {
  border-top: 1px solid var(--line);
}

.piece-title {
  margin: 0 0 3px;
  color: var(--accent-strong);
  font-weight: 800;
}

.piece-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.slack-transcript {
  max-width: 760px;
  margin: 24px 0;
  padding: 18px;
  background: #1d1c1d;
  border: 1px solid #3f3e40;
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(32, 33, 36, 0.18);
  color: #f8f8f8;
}

.slack-transcript a {
  color: #7bdff2;
}

.slack-message {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
}

.slack-message + .slack-message {
  border-top: 1px solid #343235;
}

.slack-avatar {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  background: #2f2d31;
}

.slack-author {
  margin: 0 0 2px;
  color: #ffffff;
  font-weight: 800;
  line-height: 1.25;
}

.slack-text {
  margin: 0;
  color: #e8e8e8;
}

code {
  padding: 0.12em 0.32em;
  background: var(--code);
  border-radius: 4px;
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  padding: 16px;
  background: #1f2933;
  color: #f8fafc;
  border-radius: 8px;
}

pre code {
  padding: 0;
  background: transparent;
}

.site-footer {
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding-top: 32px;
  }

  .profile {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 28px;
  }

  .profile-photo-frame {
    justify-self: start;
    order: -1;
    width: min(220px, 72vw);
  }

  .post-frame {
    display: block;
  }

  .article-toc {
    position: static;
    margin: 0 0 28px;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
  }

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

  .pieces-table,
  .pieces-table thead,
  .pieces-table tbody,
  .pieces-table tr,
  .pieces-table th,
  .pieces-table td {
    display: block;
  }

  .pieces-table thead {
    display: none;
  }

  .pieces-table tr {
    padding: 14px 16px;
  }

  .pieces-table tr + tr {
    border-top: 1px solid var(--line);
  }

  .pieces-table td {
    width: auto;
    padding: 0;
    border-bottom: 0;
  }

  .pieces-table td:first-child {
    width: auto;
  }

  .pieces-table td + td {
    margin-top: 4px;
  }
}