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

:root {
  --accent: #0d9488;
  --accent-light: #e6f7f5;
  --text: #1c1c1c;
  --muted: #6b7280;
  --border: #e5e5e0;
  --bg: #fafaf8;
  --white: #ffffff;
}

body {
  font-family: Georgia, "Times New Roman", serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

/* HEADER */
header {
  background: var(--white);
  border-bottom: 2px solid var(--text);
  padding: 0 32px;
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-family: Georgia, serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.logo em {
  color: var(--accent);
  font-style: normal;
}
nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
nav a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
nav a:hover { color: var(--text); }

/* MASTHEAD */
.masthead {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 52px 32px 48px;
}
.masthead-inner {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: end;
}
.masthead-label {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.masthead h1 {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  color: var(--text);
}
.masthead-desc {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.7;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.masthead-stat {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--muted);
}
.masthead-stat strong { color: var(--text); }

/* ARTICLE LIST */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 52px 32px 100px;
}
.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}
.section-header h2 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}
.section-header::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.article-list { display: flex; flex-direction: column; }

.article-card {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s;
}
.article-card:hover { opacity: 0.75; }

.article-date {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  color: var(--muted);
  padding-top: 5px;
  text-align: right;
}
.article-date .month { display: block; font-weight: 600; }
.article-date .year { display: block; }

.article-content .tag {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 10px;
}
.article-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 10px;
  color: var(--text);
}
.article-content p {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 10px;
}
.read-more::after { content: "→"; }

/* ARTICLE PAGE */
.article-wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 32px 100px;
}
.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 40px;
  transition: color 0.2s;
}
.back::before { content: "←"; }
.back:hover { color: var(--text); }

.article-header { margin-bottom: 44px; padding-bottom: 32px; border-bottom: 2px solid var(--text); }
.article-header .tag {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 16px;
}
.article-header h1 {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.3px;
  margin-bottom: 18px;
  color: var(--text);
}
.article-header .meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  color: var(--muted);
}

.article-body { font-size: 1.05rem; line-height: 1.85; }
.article-body h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 44px 0 14px;
  color: var(--text);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.article-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 28px 0 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.article-body p { margin-bottom: 20px; }
.article-body ul, .article-body ol { margin: 0 0 20px 24px; }
.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--text); }
.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 14px 20px;
  margin: 28px 0;
  background: var(--accent-light);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: #374151;
}
.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}
.article-body a { color: var(--accent); }

/* FOOTER */
footer {
  border-top: 2px solid var(--text);
  background: var(--white);
  text-align: center;
  padding: 36px 24px;
}
footer p {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  color: var(--muted);
}
footer a { color: var(--accent); text-decoration: none; }

@media (max-width: 640px) {
  .masthead-inner { grid-template-columns: 1fr; gap: 24px; }
  .masthead h1 { font-size: 1.9rem; }
  .article-card { grid-template-columns: 1fr; gap: 8px; }
  .article-date { text-align: left; display: flex; gap: 6px; }
  .article-header h1 { font-size: 1.6rem; }
}
:root {
  --accent: #72e6d4;
  --accent-light: #143d45;
  --text: #eaf2f2;
  --muted: #a7b9c4;
  --border: #29404c;
  --bg: #08151e;
  --white: #102431;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 80% 0, #143746, #08151e 48%);
}

header {
  background: #07131c;
  border-bottom: 1px solid #29404c;
}

.header-inner,
.masthead-inner,
.container {
  max-width: 1120px;
}

.logo,
.masthead h1,
.article-content h2,
.article-header h1,
.article-body h2 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.logo {
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}

nav a:hover,
.back:hover {
  color: var(--accent);
}

.masthead {
  background: linear-gradient(115deg, #112d3a, #0a1d2a 60%, #07131c);
  border-bottom: 1px solid #29404c;
  padding: 100px 32px 92px;
}

.masthead-inner {
  grid-template-columns: 1.25fr 0.75fr;
  gap: 72px;
  align-items: center;
}

.masthead-label,
.section-header h2 {
  letter-spacing: 0.2em;
}

.masthead h1 {
  max-width: 660px;
  font-size: clamp(2.8rem, 5vw, 5rem);
  font-weight: 750;
  letter-spacing: -0.05em;
  line-height: 1.04;
}

.masthead-desc {
  font-size: 1.08rem;
}

.masthead-stat {
  line-height: 1.65;
}

.container {
  padding-top: 72px;
}

.article-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 0;
  min-height: 285px;
  padding: 28px;
  background: #102431;
  border: 1px solid #29404c;
  border-radius: 18px;
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}

.article-card:hover {
  opacity: 1;
  transform: translateY(-4px);
  border-color: var(--accent);
  background: #153040;
}

.article-date {
  display: flex;
  gap: 5px;
  margin-bottom: 18px;
  text-align: left;
}

.article-content {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
}

.article-content .tag,
.article-header .tag {
  border-radius: 100px;
  padding: 4px 10px;
}

.article-content h2 {
  font-size: 1.45rem;
  letter-spacing: -0.025em;
}

.article-content p {
  font-size: 0.92rem;
}

.read-more {
  margin-top: auto;
  padding-top: 22px;
}

.article-wrap {
  max-width: 790px;
  padding-top: 72px;
}

.article-header {
  border-color: var(--accent);
}

.article-header h1 {
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  letter-spacing: -0.04em;
}

.article-body {
  color: #d9e5e8;
}

.article-body blockquote {
  color: var(--text);
  border-radius: 0 12px 12px 0;
}

footer {
  background: #07131c;
  border-top: 1px solid var(--border);
}

@media (max-width: 760px) {
  .masthead {
    padding: 64px 24px;
  }

  .masthead-inner,
  .article-list {
    grid-template-columns: 1fr;
  }

  .masthead-inner {
    gap: 30px;
  }

  .article-card {
    min-height: 0;
  }
}