/* =========================================================
   DataKook Blog Styles
   ========================================================= */

:root {
  --blue-900: #0a1628;
  --blue-800: #0d1f3c;
  --blue-600: #104c97;
  --blue-500: #1a6fd4;
  --blue-400: #4d94e8;
  --blue-300: #7eb8f7;
  --blue-100: #e7f1fe;
  --green-500: #34b44a;
  --green-400: #4fd165;
  --gray-950: #09090b;
  --gray-900: #18181b;
  --gray-800: #27272a;
  --gray-600: #52525b;
  --gray-500: #71717a;
  --gray-400: #a1a1aa;
  --gray-300: #d4d4d8;
  --gray-200: #e4e4e7;
  --gray-100: #f4f4f5;
  --gray-50: #fafafa;
  --white: #ffffff;
  --gradient-text: linear-gradient(135deg, var(--blue-400), var(--green-400));
  --max-w: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

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

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 8px; font-weight: 600;
  font-size: 0.9rem; transition: all 0.3s ease; border: none; cursor: pointer;
}
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-primary { background: var(--blue-500); color: white !important; }
.btn-primary:hover { background: var(--blue-600); transform: translateY(-1px); }

/* ── Header ──────────────────────────────── */
.blog-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}
.blog-nav {
  max-width: var(--max-w); margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.blog-nav-logo img { height: 32px; }
.blog-nav-links { display: flex; align-items: center; gap: 24px; font-size: 0.9rem; }
.blog-nav-links a { color: var(--gray-600); transition: color 0.2s; }
.blog-nav-links a:hover, .blog-nav-links a.active { color: var(--blue-500); }

/* ── Hero ──────────────────────────────── */
.blog-hero {
  padding: 80px 0 48px; text-align: center;
  background: linear-gradient(180deg, var(--blue-100) 0%, var(--white) 100%);
}
.blog-hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 16px; }
.blog-hero-sub { font-size: 1.1rem; color: var(--gray-600); max-width: 600px; margin: 0 auto; }

/* ── Blog Cards ──────────────────────────── */
.blog-posts { padding: 48px 0 80px; }

.blog-card {
  border: 1px solid var(--gray-200); border-radius: 12px;
  overflow: hidden; transition: all 0.3s ease; background: white;
}
.blog-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.08); transform: translateY(-2px); }

.blog-card--featured {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  margin-bottom: 48px;
}
.blog-card--featured .blog-card-image img { height: 100%; object-fit: contain; }

.blog-card-image { overflow: hidden; }
.blog-card-image img { width: 100%; height: 200px; transition: transform 0.3s; }
.blog-card:hover .blog-card-image img { transform: scale(1.03); }
.blog-card--featured .blog-card-image img { height: 100%; }

.blog-card-content { padding: 24px; }
.blog-card--featured .blog-card-content { padding: 32px; display: flex; flex-direction: column; justify-content: center; }

.blog-card-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 0.8rem; }
.blog-tag {
  background: var(--blue-100); color: var(--blue-600); padding: 4px 10px;
  border-radius: 20px; font-weight: 600; font-size: 0.75rem; text-transform: uppercase;
}
.blog-card-meta time { color: var(--gray-500); }

.blog-card h2 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.blog-card--featured h2 { font-size: 1.5rem; }
.blog-card h2 a { color: var(--gray-900); }
.blog-card h2 a:hover { color: var(--blue-500); }

.blog-card p { color: var(--gray-600); font-size: 0.9rem; line-height: 1.6; margin-bottom: 12px; }
.blog-read-more { color: var(--blue-500); font-weight: 600; font-size: 0.85rem; }
.blog-read-more:hover { color: var(--blue-600); }

.blog-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

/* ── CTA ──────────────────────────────── */
.blog-cta {
  padding: 64px 0; text-align: center;
  background: var(--gray-950); color: white;
}
.blog-cta h2 { font-size: 1.8rem; margin-bottom: 12px; }
.blog-cta p { color: var(--gray-400); margin-bottom: 24px; }
.blog-cta-form {
  display: flex; gap: 12px; justify-content: center; max-width: 420px; margin: 0 auto;
}
.blog-cta-form input[type="email"] {
  flex: 1; padding: 12px 16px; border-radius: 8px; border: 1px solid var(--gray-600);
  background: var(--gray-900); color: white; font-size: 0.9rem;
}
.blog-cta-form input::placeholder { color: var(--gray-500); }

/* ── Footer ──────────────────────────────── */
.blog-footer {
  padding: 32px 0; border-top: 1px solid var(--gray-200); text-align: center;
}
.blog-footer .container { display: flex; justify-content: space-between; align-items: center; }
.blog-footer p { color: var(--gray-500); font-size: 0.85rem; }
.blog-footer-links { display: flex; gap: 20px; }
.blog-footer-links a { color: var(--gray-500); font-size: 0.85rem; }
.blog-footer-links a:hover { color: var(--blue-500); }

/* ── Responsive ──────────────────────────── */
@media (max-width: 768px) {
  .blog-card--featured { grid-template-columns: 1fr; }
  .blog-hero h1 { font-size: 2rem; }
  .blog-grid { grid-template-columns: 1fr; }
  .blog-cta-form { flex-direction: column; }
  .blog-footer .container { flex-direction: column; gap: 16px; }
}