* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f1923;
  color: #e0e0e0;
  line-height: 1.7;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
a { color: #4fc3f7; text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
header {
  background: linear-gradient(135deg, #1a2a3a, #0f1923);
  border-bottom: 2px solid #2a4a6a;
  padding: 15px 0;
  position: sticky; top: 0; z-index: 100;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 24px; font-weight: 800; color: #4fc3f7; text-decoration: none !important; }
.logo span { color: #ff9800; }
nav ul { display: flex; gap: 20px; list-style: none; }
nav a { color: #b0bec5; text-decoration: none; font-size: 14px; font-weight: 500; transition: color .2s; }
nav a:hover { color: #4fc3f7; text-decoration: none; }

/* Main */
main { padding: 40px 0; min-height: 60vh; }
h1 { font-size: 32px; color: #fff; margin-bottom: 12px; line-height: 1.3; }
h2 { font-size: 22px; color: #4fc3f7; margin: 28px 0 10px; }
h3 { font-size: 18px; color: #fff; margin: 16px 0 8px; }
p { margin-bottom: 14px; font-size: 16px; color: #c5cdd5; }
.lead { font-size: 18px; color: #90a4a8; margin-bottom: 30px; }
ul { margin: 0 0 14px 22px; color: #c5cdd5; }
li { margin-bottom: 6px; }

.breadcrumb { font-size: 13px; color: #607d8b; margin-bottom: 20px; }
.article-meta { font-size: 13px; color: #607d8b; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 1px solid #1e3245; }

/* Article grid (home + index pages) */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
  margin-top: 20px;
}
.article-card {
  background: #1a2a3a;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid #2a3a4a;
  transition: border-color .2s;
}
.article-card:hover { border-color: #4fc3f7; }
.article-img {
  width: 100%; height: 180px;
  background: linear-gradient(135deg, #2a4a6a, #1a2a3a);
  display: flex; align-items: center; justify-content: center;
  font-size: 48px;
}
.article-body { padding: 20px; }
.article-tag {
  display: inline-block;
  background: rgba(79,195,247,.15);
  color: #4fc3f7;
  font-size: 11px; font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}
.article-body h3 a { color: #fff; }
.article-body p { font-size: 14px; color: #90a4a8; margin-bottom: 0; }
.article-meta { margin-top: 12px; }

/* Tips grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}
.tip-card {
  background: #1a2a3a;
  border-radius: 8px;
  padding: 25px;
  border-left: 3px solid #ff9800;
}
.tip-card h4 { margin-bottom: 8px; font-size: 16px; }
.tip-card h4 a { color: #ff9800; }
.tip-card p { color: #b0bec5; font-size: 14px; margin: 0; }

/* Related */
.related {
  margin-top: 36px; padding: 20px;
  background: #14202c; border-radius: 8px;
  border: 1px solid #1e3245;
}
.related h3 { margin-top: 0; color: #4fc3f7; font-size: 16px; }
.related ul { margin-bottom: 0; }

/* Footer */
footer {
  background: #060d14;
  padding: 30px 0;
  text-align: center;
  color: #607d8b;
  font-size: 13px;
}
footer a { color: #4fc3f7; }
footer p { margin-bottom: 6px; }

/* Hero (homepage) */
.hero {
  background: linear-gradient(135deg, #1a2a3a 0%, #0d1b2a 50%, #1b2838 100%);
  padding: 60px 0;
  text-align: center;
}
.hero h1 span { color: #4fc3f7; }
.hero p {
  font-size: 18px; color: #b0bec5;
  max-width: 600px; margin: 0 auto 30px;
}
.hero-btn {
  display: inline-block;
  background: linear-gradient(135deg, #4fc3f7, #0288d1);
  color: #fff !important;
  padding: 14px 40px;
  border-radius: 8px;
  text-decoration: none !important;
  font-weight: 700; font-size: 16px;
  transition: transform .2s, box-shadow .2s;
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(79,195,247,.3); }

@media (max-width: 768px) {
  nav ul { gap: 12px; flex-wrap: wrap; }
  h1 { font-size: 26px; }
  .article-grid { grid-template-columns: 1fr; }
}