:root {
  --color-primary: #a266cc;
  --color-primary-soft: #C2BBF0;
  --color-text: #363732;
  --color-muted: #6f716c;
  --color-line: #dedbd0;
  --color-surface: #fbfaf7;
  --color-accent: #C0BDA5;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--color-text);
  background: var(--color-surface);
  font-family: var(--font-sans);
  line-height: 1.6;
}

body {
  margin: 0;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #7f43aa;
}

.site-header {
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 24px 18px;
}

.site-title {
  color: var(--color-text);
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.home,
.article-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 42px 24px 64px;
}

.site-footer {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 0.94rem;
}

.site-footer p {
  margin: 0;
}

.intro {
  max-width: 690px;
  padding-bottom: 42px;
  border-bottom: 1px solid var(--color-line);
}

.intro h1,
.article-header h1 {
  margin: 0;
  color: var(--color-text);
  font-size: clamp(2rem, 6vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.intro p {
  max-width: 560px;
  margin: 18px 0 0;
  color: var(--color-muted);
  font-size: 1.06rem;
}

.article-list {
  max-width: 720px;
  padding-top: 36px;
}

.article-list h2 {
  margin: 0 0 18px;
  color: var(--color-text);
  font-size: 1rem;
  letter-spacing: 0;
}

.article-card {
  border-top: 1px solid var(--color-line);
}

.article-card:last-child {
  border-bottom: 1px solid var(--color-line);
}

.article-card a {
  display: block;
  padding: 22px 0;
  color: var(--color-text);
  text-decoration: none;
}

.article-card h3 {
  margin: 4px 0 6px;
  color: var(--color-text);
  font-size: 1.24rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.article-card p {
  margin: 0;
  color: var(--color-muted);
}

.article-card-date,
.article-date {
  color: var(--color-primary);
  font-size: 0.86rem;
  font-weight: 700;
}

.article {
  max-width: 720px;
}

.article-header {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
}

.article-date {
  margin: 0 0 12px;
}

.article-content {
  padding-top: 30px;
  font-size: 1.04rem;
}

.article-content h1,
.article-content h2,
.article-content h3 {
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: 0;
}

.article-content h1 {
  margin: 42px 0 14px;
  font-size: 2rem;
}

.article-content h2 {
  margin: 38px 0 12px;
  font-size: 1.48rem;
}

.article-content h3 {
  margin: 30px 0 10px;
  font-size: 1.16rem;
}

.article-content p,
.article-content ul {
  margin: 0 0 20px;
}

.article-content ul {
  padding-left: 1.3rem;
}

.article-content li + li {
  margin-top: 6px;
}

.article-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 30px 0;
  border: 1px solid var(--color-line);
}

.article-content code {
  padding: 0.1em 0.28em;
  background: #f0eef5;
  border: 1px solid var(--color-primary-soft);
  border-radius: 4px;
  font-size: 0.92em;
}

.article-content pre {
  overflow-x: auto;
  margin: 26px 0;
  padding: 16px;
  background: #f4f2ed;
  border: 1px solid var(--color-line);
}

.article-content pre code {
  padding: 0;
  background: transparent;
  border: 0;
}

@media (max-width: 640px) {
  .site-header {
    padding: 22px 18px 12px;
  }

  .home,
  .article-page {
    padding: 30px 18px 48px;
  }

  .site-footer {
    padding: 20px 18px;
  }

  .intro {
    padding-bottom: 32px;
  }
}