*, *::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 { background: #f4f2ff; color: #28244b; }
header { background: #29234e; }
.header-inner, .container { max-width: 1240px; }
.logo { font-size: 1.4rem; letter-spacing: -.06em; }
.logo span { color: #ffd974; }
nav a { color: #e7dfff; }
.hero { padding: 94px 24px; background: radial-gradient(circle at 80% 10%, #ffb0ad, transparent 32%), linear-gradient(120deg, #d7cdfb, #f6d3d9); border-bottom: 0; }
.hero h1 { max-width: 960px; color: #29234e; font-size: clamp(2.8rem, 5vw, 5.2rem); font-weight: 850; letter-spacing: -.07em; line-height: 1.03; }
.hero p { color: #50476c; font-size: 1.12rem; }
.container { padding-top: 58px; }
.section-label { color: #5a3aae; letter-spacing: .18em; }
.article-list { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 18px; }
.article-card { grid-column: span 4; display: flex; flex-direction: column; min-height: 320px; padding: 30px; background: #fff; border: 0; border-radius: 28px; box-shadow: 0 6px 0 #d8d2e7; transition: transform .2s, box-shadow .2s; }
.article-card:nth-child(7n + 1), .article-card:nth-child(7n + 5) { grid-column: span 8; background: #d7cdfb; }
.article-card:nth-child(7n + 2) { background: #ffdfcf; }
.article-card:nth-child(7n + 4) { background: #cff0dd; }
.article-card:nth-child(7n + 6) { background: #ffe9a9; }
.article-card:hover { transform: translateY(-5px); box-shadow: 0 11px 0 #d8d2e7; }
.article-card .meta { color: #5c5378; }
.tag { color: #4f359a; background: rgba(255,255,255,.6); border-radius: 100px; padding: 4px 10px; }
.article-card h2 { color: #29234e; font-size: clamp(1.25rem, 2vw, 1.85rem); letter-spacing: -.05em; }
.article-card p { color: #50476c; margin-top: auto; }
.article-wrap { max-width: 790px; }
.article-header h1 { color: #29234e; font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -.05em; }
.article-body h2, .article-body h3 { color: #29234e; }
.article-body blockquote { background: #ded6fa; border-color: #6a4ab7; }
footer { background: #29234e; color: #d0c5eb; }
footer a { color: #ffd974; }
@media (max-width: 900px) {
  .article-card, .article-card:nth-child(7n + 1), .article-card:nth-child(7n + 5) { grid-column: span 6; }
}
@media (max-width: 620px) {
  .hero { padding: 70px 24px; }
  .article-card, .article-card:nth-child(7n + 1), .article-card:nth-child(7n + 5) { grid-column: 1 / -1; min-height: 0; }
}