*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #f9f9f7;
  color: #1a1a1a;
  line-height: 1.7;
}

/* HEADER */
header {
  background: #0f1117;
  padding: 0 24px;
}
.header-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.3px;
}
.logo span { color: #4f8ef7; }
nav a {
  color: #aaa;
  text-decoration: none;
  font-size: 0.9rem;
  margin-left: 24px;
  transition: color 0.2s;
}
nav a:hover { color: #fff; }

/* HERO (index only) */
.hero {
  background: #0f1117;
  padding: 56px 24px 64px;
  text-align: center;
  border-bottom: 1px solid #222;
}
.hero h1 {
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  max-width: 640px;
  margin: 0 auto 16px;
  line-height: 1.3;
}
.hero p {
  color: #888;
  font-size: 1rem;
  max-width: 520px;
  margin: 0 auto;
}

/* ARTICLE GRID */
.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #888;
  margin-bottom: 24px;
}
.article-list { display: flex; flex-direction: column; gap: 24px; }

.article-card {
  background: #fff;
  border: 1px solid #e8e8e4;
  border-radius: 10px;
  padding: 28px 32px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.article-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  border-color: #c8c8c0;
}
.article-card .meta {
  font-size: 0.8rem;
  color: #999;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.tag {
  background: #eef3ff;
  color: #4f8ef7;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
}
.article-card h2 {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
  color: #111;
}
.article-card p {
  font-size: 0.9rem;
  color: #666;
  line-height: 1.6;
}

/* ARTICLE PAGE */
.article-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 100px;
}
.article-wrap .back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #888;
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 36px;
  transition: color 0.2s;
}
.article-wrap .back:hover { color: #333; }
.article-wrap .back::before { content: "←"; }

.article-header { margin-bottom: 40px; }
.article-header .tag-row {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.article-header h1 {
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.25;
  color: #0f1117;
  margin-bottom: 16px;
}
.article-header .meta {
  font-size: 0.85rem;
  color: #999;
}
.article-header .meta strong { color: #555; }

.article-body { font-size: 1rem; line-height: 1.8; color: #2a2a2a; }
.article-body h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 40px 0 14px;
  color: #0f1117;
}
.article-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 28px 0 10px;
  color: #111;
}
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol {
  margin: 0 0 18px 24px;
}
.article-body li { margin-bottom: 8px; }
.article-body strong { color: #111; }
.article-body em { color: #444; }
.article-body blockquote {
  border-left: 3px solid #4f8ef7;
  padding: 12px 20px;
  margin: 24px 0;
  background: #f0f5ff;
  border-radius: 0 6px 6px 0;
  color: #444;
  font-style: italic;
}
.article-body hr {
  border: none;
  border-top: 1px solid #e8e8e4;
  margin: 36px 0;
}

/* FOOTER */
footer {
  background: #0f1117;
  text-align: center;
  padding: 32px 24px;
  color: #555;
  font-size: 0.82rem;
}
footer a { color: #4f8ef7; text-decoration: none; }

@media (max-width: 600px) {
  .hero h1 { font-size: 1.5rem; }
  .article-card { padding: 20px; }
  .article-header h1 { font-size: 1.5rem; }
}
body { display: grid; grid-template-columns: minmax(310px, 40%) minmax(0, 60%); background: #f8f4eb; color: #302b25; font-family: Georgia, "Times New Roman", serif; }
header, footer, .article-wrap { grid-column: 1 / -1; }
header { background: #f8f4eb; border-bottom: 1px solid #cbbfa9; }
.header-inner { max-width: none; padding: 0 4vw; }
.logo { color: #302b25; font-family: Georgia, serif; font-size: 1.6rem; }
.logo span { color: #ad5838; }
nav a { color: #594f42; font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.hero { position: sticky; top: 0; align-self: start; display: flex; flex-direction: column; justify-content: center; min-height: calc(100vh - 64px); padding: 8vw 5vw; text-align: left; background: #d7dfd5; border-right: 1px solid #a8b6a8; border-bottom: 0; }
.hero h1 { max-width: 520px; margin: 0 0 28px; color: #254037; font-family: Georgia, serif; font-size: clamp(2.8rem, 4vw, 5.3rem); font-weight: 400; letter-spacing: -.06em; line-height: 1.04; }
.hero p { max-width: 430px; margin: 0; color: #4d675c; font-family: Georgia, serif; font-size: 1.15rem; }
.container { width: 100%; max-width: none; padding: 64px 5vw 100px; }
.section-label { color: #ad5838; letter-spacing: .2em; }
.article-list { gap: 0; }
.article-card { padding: 30px 0; background: transparent; border: 0; border-top: 1px solid #cbbfa9; border-radius: 0; }
.article-card:hover { box-shadow: none; border-color: #ad5838; }
.article-card .meta { color: #7a6a5d; }
.tag { color: #ad5838; background: transparent; padding: 0; text-transform: uppercase; letter-spacing: .1em; }
.article-card h2 { color: #302b25; font-family: Georgia, serif; font-size: clamp(1.5rem, 2vw, 2.2rem); font-weight: 400; letter-spacing: -.04em; }
.article-card p { color: #665a4d; font-family: Georgia, serif; font-size: 1rem; }
.article-wrap { max-width: 850px; padding-top: 90px; }
.article-header { padding-bottom: 32px; border-bottom: 1px solid #cbbfa9; }
.article-header h1 { color: #302b25; font-family: Georgia, serif; font-size: clamp(2.3rem, 4vw, 3.6rem); font-weight: 400; letter-spacing: -.04em; }
.article-body { font-family: Georgia, serif; font-size: 1.1rem; }
.article-body h2, .article-body h3 { color: #302b25; font-family: Georgia, serif; }
.article-body blockquote { background: #e6ebe3; border-color: #4d675c; }
footer { background: #e5e0d5; border-top: 1px solid #cbbfa9; color: #685e52; }
footer a { color: #ad5838; }
@media (max-width: 900px) {
  body { display: block; }
  .hero { position: static; min-height: 0; padding: 72px 24px; border-right: 0; border-bottom: 1px solid #a8b6a8; }
  .container { padding: 48px 24px 80px; }
}