:root {
  --accent: #1678c9;
  --accent-strong: #07538e;
  --surface: #f7fbff;
  --surface-raised: #ffffff;
  --line: rgba(24, 80, 122, 0.15);
}

body {
  background: #f7f2e8;
}

.header {
  border-bottom: 1px solid var(--line);
}

.nav,
.main,
.footer {
  max-width: 1220px;
}

.post-single,
.post-content {
  font-size: 1.06rem;
}

.post-single {
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: var(--surface-raised);
  box-shadow: 0 18px 55px rgba(48, 35, 12, 0.06);
}

.post-header .post-title,
.post-content h1,
.post-content h2 {
  letter-spacing: -0.035em;
}

.post-content h2 {
  margin-top: 2.25rem;
}

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

.post-entry {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--surface-raised);
  transition: transform .2s ease, box-shadow .2s ease;
}

.post-entry:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 36px rgba(48, 35, 12, 0.1);
}

.page-header h1 {
  letter-spacing: -0.04em;
}

.portfolio-callout {
  margin: 2rem 0;
  padding: 1.25rem 1.4rem;
  border-left: 4px solid var(--accent);
  border-radius: .75rem;
  background: rgba(232, 192, 110, .14);
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.skill-grid > div {
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: .9rem;
  background: var(--surface);
}

.skill-grid strong,
.skill-grid span {
  display: block;
}

.skill-grid span {
  margin-top: .35rem;
  color: var(--secondary);
}

html[data-theme="dark"] {
  --accent: #55c7ff;
  --accent-strong: #8edbff;
  --surface: #121d29;
  --surface-raised: #172534;
  --line: rgba(142, 219, 255, 0.16);
}

html[data-theme="dark"] body {
  background: #111418;
}

@media (max-width: 640px) {
  .post-single { border-radius: 1rem; }
  .skill-grid { grid-template-columns: 1fr; }
}