:root {
  --orange:       #F97316;
  --orange-dark:  #EA6A08;
  --bg:           #FAF7F2;
  --bg-card:      #FFFFFF;
  --text:         #1A1A1A;
  --text-muted:   #6B7280;
  --border:       #E8E3DC;
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --radius:       12px;
  --radius-sm:    8px;
  --font:         'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width:    800px;
  --nav-height:   64px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--orange); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--orange-dark); }
img { display: block; max-width: 100%; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-wordmark {
  font-size: 17px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-links a:hover {
  color: var(--text);
}

.article-header {
  padding: 64px 0 48px;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text);
}

.article-meta {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.article-content {
  background: var(--bg-card);
  padding: 48px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 64px;
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 20px;
  color: var(--text);
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content p {
  margin-bottom: 16px;
  color: var(--text);
  line-height: 1.8;
}

.article-content a {
  color: var(--orange);
  font-weight: 600;
}

.article-footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 32px;
  color: var(--orange);
  font-weight: 600;
}

.back-link:hover {
  color: var(--orange-dark);
}

.disclaimer {
  background: var(--orange-light, rgba(249, 115, 22, 0.1));
  padding: 20px;
  border-left: 4px solid var(--orange);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  margin-top: 32px;
}

@media (max-width: 640px) {
  .article-title { font-size: 1.75rem; }
  .article-content { padding: 24px; }
  .article-content h2 { font-size: 1.4rem; }
  .article-header { padding: 40px 0 32px; }
}