:root {
  --teal: #008B8B;
  --teal-dark: #006666;
  --orange: #E8873D;
  --orange-light: #F4A460;
  --white: #FFFFFF;
  --gray-light: #F5F5F5;
  --gray: #666;
  --text: #333;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, sans-serif; color: var(--text); line-height: 1.7; }
a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--teal-dark); text-decoration: underline; }
img { max-width: 100%; height: auto; }

/* Header */
.accent-bar { height: 4px; background: linear-gradient(90deg, var(--teal), var(--orange)); }
.site-header { background: var(--white); border-bottom: 3px solid var(--teal); padding: 1rem 0; }
.header-inner { max-width: 1000px; margin: 0 auto; padding: 0 1.5rem; display: flex; align-items: center; gap: 1.5rem; }
.site-logo img { height: 55px; }
.site-title { font-size: 1.5rem; color: var(--teal); font-weight: 700; }
.site-subtitle { font-size: 0.85rem; color: var(--gray); }

/* Nav */
.site-nav { background: var(--teal); }
.nav-inner { max-width: 1000px; margin: 0 auto; padding: 0 1.5rem; }
.site-nav ul { list-style: none; display: flex; flex-wrap: wrap; }
.site-nav li a { display: block; color: var(--white); padding: 0.6rem 1.1rem; font-size: 0.9rem; font-weight: 500; }
.site-nav li a:hover, .site-nav li a.active { background: var(--teal-dark); text-decoration: none; }

/* Container */
.container { max-width: 1000px; margin: 0 auto; padding: 2rem 1.5rem; }
.content-wrap { display: grid; grid-template-columns: 1fr 280px; gap: 2rem; }
.main { min-width: 0; }

/* Page */
.page-title { color: var(--teal-dark); font-size: 1.7rem; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--orange); }
.page-content h2 { color: var(--teal); margin: 1.5rem 0 0.8rem; font-size: 1.3rem; }
.page-content h3 { color: var(--teal-dark); margin: 1.2rem 0 0.6rem; }
.page-content p { margin-bottom: 1rem; }
.page-content ul, .page-content ol { margin: 0.8rem 0 1rem 1.5rem; }
.page-content blockquote { border-left: 4px solid var(--orange); padding: 0.8rem 1.2rem; margin: 1rem 0; background: #FFF8F0; font-style: italic; }
.page-content a { text-decoration: underline; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; margin: 1.5rem 0; }
.card { background: var(--white); border: 1px solid #e0e0e0; border-radius: 8px; padding: 1.3rem; transition: box-shadow 0.2s; }
.card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.08); border-color: var(--teal); }
.card h3 { color: var(--teal); margin-bottom: 0.4rem; font-size: 1.05rem; }
.card h3 a { color: var(--teal); text-decoration: none; }
.card p { color: var(--gray); font-size: 0.9rem; }
.card .tag { display: inline-block; background: var(--teal); color: white; padding: 0.15rem 0.5rem; border-radius: 3px; font-size: 0.75rem; margin-bottom: 0.5rem; }

/* Hero */
.hero { background: linear-gradient(135deg, var(--teal), var(--teal-dark)); color: white; padding: 2.5rem; border-radius: 8px; margin-bottom: 2rem; }
.hero h2 { font-size: 1.4rem; margin-bottom: 0.6rem; }
.hero p { opacity: 0.95; }

/* Sidebar */
.sidebar { font-size: 0.9rem; }
.sidebar-box { background: var(--gray-light); border-radius: 8px; padding: 1.2rem; margin-bottom: 1.5rem; }
.sidebar-box h3 { color: var(--teal); font-size: 1rem; margin-bottom: 0.6rem; padding-bottom: 0.3rem; border-bottom: 2px solid var(--orange); }
.sidebar-box ul { list-style: none; }
.sidebar-box li { padding: 0.3rem 0; }
.sidebar-box li a { font-size: 0.85rem; }

/* Footer */
.site-footer { background: var(--text); color: #ccc; padding: 1.5rem 0; margin-top: 3rem; font-size: 0.85rem; text-align: center; }
.site-footer a { color: var(--orange-light); }

/* Blog list */
.post-list { list-style: none; }
.post-list li { padding: 1rem 0; border-bottom: 1px solid #eee; }
.post-list li a { font-size: 1.05rem; font-weight: 600; }
.post-list .summary { color: var(--gray); font-size: 0.9rem; margin-top: 0.2rem; }

/* Responsive */
@media (max-width: 768px) {
  .content-wrap { grid-template-columns: 1fr; }
  .header-inner { flex-direction: column; text-align: center; }
  .site-nav ul { justify-content: center; }
  .cards { grid-template-columns: 1fr; }
}