:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --text: #171717;
  --muted: #525252;
  --faint: #737373;
  --line: #e5e5e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --text: #ededed;
    --muted: #d4d4d4;
    --faint: #a3a3a3;
    --line: #262626;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--faint);
}

.container {
  width: min(640px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 56px;
  color: var(--muted);
}

.nav a {
  border-bottom: 1px solid transparent;
}

.nav a:hover {
  border-bottom-color: currentColor;
}

.intro {
  margin-bottom: 38px;
}

h1 {
  margin: 0 0 18px;
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 16px;
  font-size: 1.25rem;
  line-height: 1.3;
  font-weight: 650;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 3px;
  font-size: 1rem;
  line-height: 1.4;
  font-weight: 600;
}

p {
  margin: 0 0 14px;
  color: var(--muted);
}

.section {
  margin-top: 34px;
}

.timeline {
  margin: 0 0 0 8px;
  padding: 0 0 0 16px;
  border-left: 1px solid var(--line);
  list-style: none;
}

.timeline li {
  position: relative;
  margin-bottom: 24px;
}

.timeline li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: -21px;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line);
}

.timeline li:last-child {
  margin-bottom: 0;
}

.date {
  margin-bottom: 2px;
  color: var(--faint);
  font-size: 0.92rem;
}

.title {
  font-weight: 600;
}

.description {
  color: var(--muted);
  font-size: 0.94rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.project-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  transition: box-shadow 160ms ease, transform 160ms ease;
}

.project-card:hover {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}

.project-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.project-heading a {
  color: var(--muted);
  font-size: 0.88rem;
}

.project-card p {
  margin-top: 8px;
  font-size: 0.94rem;
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tech-list span {
  border-radius: 4px;
  background: color-mix(in srgb, var(--line), transparent 45%);
  color: var(--muted);
  font-size: 0.78rem;
  padding: 4px 8px;
}

.post-list {
  display: grid;
  gap: 8px;
}

.post-list a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--text);
}

.post-list time {
  color: var(--faint);
  white-space: nowrap;
}

.post time {
  display: block;
  margin-bottom: 8px;
  color: var(--faint);
}

.post h1 {
  margin-bottom: 8px;
}

.post h2 {
  margin-top: 28px;
}

.summary {
  margin-bottom: 24px;
  color: var(--faint);
}

.footer {
  display: flex;
  gap: 14px;
  margin-top: 44px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, 640px);
    padding: 24px 0;
  }

  .nav {
    margin-bottom: 42px;
  }

  .post-list a {
    display: grid;
    gap: 0;
  }

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