/* Tech Daily Drop — clean, fast, responsive */
:root {
  --bg: #ffffff;
  --ink: #1a1d23;
  --muted: #5b6472;
  --line: #e6e9ef;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --hero-bg: #0f172a;
  --card-bg: #f8fafc;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}
.brand {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand-mark { color: var(--accent); }
.main-nav a {
  margin-left: 1.25rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
}
.main-nav a:hover, .main-nav a.active { color: var(--accent); }

/* Hero */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 3.5rem 2rem;
  margin: 2rem 0;
  text-align: center;
}
.hero h1 { margin: 0 0 0.75rem; font-size: 2.2rem; line-height: 1.2; }
.hero-sub { color: #cbd5e1; font-size: 1.1rem; max-width: 620px; margin: 0 auto 1.5rem; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; }

/* Post grid */
.latest h2, .page-head h1 { font-size: 1.6rem; }
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0 3rem;
}
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.post-card h3 { margin: 0 0 0.4rem; font-size: 1.1rem; line-height: 1.35; }
.post-card h3 a { color: var(--ink); }
.post-meta { color: var(--muted); font-size: 0.85rem; margin: 0 0 0.5rem; }
.post-summary { color: var(--muted); font-size: 0.95rem; margin: 0 0 0.75rem; }
.post-tags .tag {
  display: inline-block;
  background: #e0e7ff;
  color: #3730a3;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  margin-right: 0.35rem;
}

/* Post list */
.page-head { margin: 2rem 0 1rem; }
.page-sub { color: var(--muted); }
.post-row { border-bottom: 1px solid var(--line); padding: 1.25rem 0; }
.post-row h2 { margin: 0 0 0.3rem; font-size: 1.3rem; }
.post-row h2 a { color: var(--ink); }
.post-row p { color: var(--muted); margin: 0.3rem 0 0; }

/* Article */
.article { max-width: 760px; margin: 2.5rem auto 3rem; }
.article-head h1 { font-size: 2rem; line-height: 1.25; margin-bottom: 0.5rem; }
.article-body h2 { margin-top: 2.2rem; font-size: 1.45rem; }
.article-body h3 { margin-top: 1.6rem; font-size: 1.15rem; }
.article-body ul, .article-body ol { padding-left: 1.4rem; }
.article-body li { margin-bottom: 0.4rem; }
.tag-link { font-size: 0.85rem; }
.article-foot {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 2rem 0;
  background: var(--card-bg);
}
.footer-inner { text-align: center; }
.footer-brand { font-weight: 800; font-size: 1.1rem; margin: 0 0 0.75rem; }
.footer-nav a { margin: 0 0.75rem; color: var(--muted); font-size: 0.9rem; }
.copyright { color: var(--muted); font-size: 0.85rem; margin-top: 1rem; }

/* Responsive */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding: 2.25rem 1.25rem; }
  .hero h1 { font-size: 1.6rem; }
  .main-nav a { margin-left: 0.8rem; font-size: 0.85rem; }
  .article-head h1 { font-size: 1.55rem; }
}