/* Ramtin Tech Zone — modern minimal dark theme */
:root {
  --bg: #0b0f17;
  --surface: #111827;
  --surface-2: #151f30;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --radius: 14px;
  --max: 1120px;
  --narrow: 780px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-hover); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { line-height: 1.25; letter-spacing: -0.02em; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: var(--narrow); margin: 0 auto; padding: 0 20px; }
.icon { width: 20px; height: 20px; flex: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 15, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; font-size: 18px; }
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, #2563eb, #60a5fa);
  color: #fff; display: grid; place-items: center;
  font-weight: 800; font-size: 19px;
}
.logo-text strong { color: var(--accent-hover); font-weight: 700; }
.site-nav { display: flex; gap: 4px; margin-left: auto; }
.site-nav a { color: var(--muted); padding: 8px 12px; border-radius: 8px; font-size: 15px; font-weight: 500; }
.site-nav a:hover { color: var(--text); text-decoration: none; background: var(--surface); }
.site-nav a.active { color: var(--text); background: var(--surface); }
.header-socials { display: flex; gap: 4px; }
.header-socials a { color: var(--muted); padding: 8px; border-radius: 8px; display: grid; place-items: center; }
.header-socials a:hover { color: var(--text); background: var(--surface); }
.header-socials .icon { width: 19px; height: 19px; }

/* Hero */
.hero { padding: 72px 0 40px; border-bottom: 1px solid var(--border); }
.hero-eyebrow { color: var(--accent-hover); font-weight: 600; font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 12px; }
.hero h1 { font-size: clamp(34px, 5vw, 54px); margin: 0 0 16px; font-weight: 800; }
.hero-sub { color: var(--muted); font-size: 19px; max-width: 640px; margin: 0 0 28px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--muted); }

/* Toolbar: filters + search */
.toolbar { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; padding: 28px 0 20px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  background: var(--surface); color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 8px 16px; font-size: 14px; font-weight: 500; cursor: pointer;
}
.chip:hover { color: var(--text); border-color: var(--muted); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.search-box {
  margin-left: auto; display: flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 0 12px; min-width: 240px;
}
.search-box .icon { width: 17px; height: 17px; color: var(--muted); }
.search-box input {
  background: none; border: 0; outline: 0; color: var(--text);
  font-size: 15px; padding: 10px 0; width: 100%; font-family: inherit;
}
.search-box input::placeholder { color: var(--muted); }
.no-results { color: var(--muted); padding: 32px 0; }

/* Cards */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding-bottom: 64px; }
.card-grid.small { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { transform: translateY(-3px); border-color: #374151; }
.card-thumb { position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden; background: #000; }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.card-duration {
  position: absolute; right: 8px; bottom: 8px;
  background: rgba(0, 0, 0, 0.8); color: #fff;
  font-size: 12px; font-weight: 600; padding: 3px 7px; border-radius: 6px;
}
.card-body { padding: 18px 18px 16px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.tag {
  background: rgba(59, 130, 246, 0.15); color: var(--accent-hover);
  font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px;
}
.card-title { font-size: 18px; margin: 0; line-height: 1.35; }
.card-title a { color: var(--text); }
.card-title a:hover { color: var(--accent-hover); text-decoration: none; }
.card-desc { color: var(--muted); font-size: 15px; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-foot { margin-top: auto; display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--muted); }
.card-link { margin-left: auto; font-weight: 600; white-space: nowrap; }

/* Post page */
.breadcrumb { padding: 28px 0 0; font-size: 14px; color: var(--muted); }
.breadcrumb a { color: var(--muted); }
.post-header { padding: 20px 0 28px; }
.post-header h1 { font-size: clamp(28px, 4vw, 42px); margin: 0 0 14px; font-weight: 800; }
.post-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.video-embed { position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden; background: #000; border: 1px solid var(--border); }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-link { margin: 18px 0 8px; }
.post-hero img { border-radius: var(--radius); border: 1px solid var(--border); }
.article-body { padding: 12px 0 8px; }
.article-body h2 { font-size: 26px; margin: 40px 0 14px; padding-top: 8px; border-top: 1px solid var(--border); }
.article-body h2:first-child { border-top: 0; margin-top: 12px; }
.article-body h3 { font-size: 21px; margin: 32px 0 10px; }
.article-body h4 { font-size: 18px; margin: 24px 0 8px; }
.article-body p { margin: 0 0 18px; }
.article-body ul, .article-body ol { margin: 0 0 18px; padding-left: 24px; }
.article-body li { margin-bottom: 6px; }
.article-body li::marker { color: var(--accent-hover); }
.article-body img { border-radius: 10px; border: 1px solid var(--border); margin: 8px 0; }
.article-body code {
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 2px 6px; border-radius: 6px; font-size: 0.88em;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
}
.article-body pre {
  background: #0d1526; border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 18px; overflow-x: auto; margin: 0 0 20px;
}
.article-body pre code { background: none; border: 0; padding: 0; font-size: 14px; line-height: 1.6; }
.article-body blockquote {
  border-left: 3px solid var(--accent); margin: 0 0 20px; padding: 4px 0 4px 18px; color: var(--muted);
}
.article-body table { width: 100%; border-collapse: collapse; margin: 0 0 20px; font-size: 15px; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.article-body th { background: var(--surface); }
.article-body hr { border: 0; border-top: 1px solid var(--border); margin: 32px 0; }
.article-footer {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 24px; margin: 32px 0;
}
.article-footer p { margin: 0; }
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 8px 0 48px; }
.post-nav-link {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 20px; display: block; color: var(--text);
}
.post-nav-link:hover { text-decoration: none; border-color: var(--accent); }
.post-nav-link span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.post-nav-link strong { font-size: 15px; line-height: 1.4; display: block; }
.post-nav-link.next { text-align: right; }
.related h2 { font-size: 24px; margin: 0 0 20px; }

/* Static pages */
.page { padding: 48px 20px 72px; }
.page h1 { font-size: clamp(30px, 4vw, 42px); margin: 0 0 24px; font-weight: 800; }
.contact-box { margin: 24px 0; }

/* Projects */
.repo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 24px 0; }
.repo-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.repo-card h3 { margin: 0 0 6px; font-size: 17px; }
.repo-card h3 a { color: var(--text); }
.repo-card p { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.repo-stars { font-size: 13px; color: var(--muted); font-weight: 600; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: #080d15; padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-blurb { color: var(--muted); font-size: 15px; max-width: 420px; }
.site-footer h4 { margin: 0 0 14px; font-size: 14px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer li a { color: var(--muted); font-size: 15px; display: inline-flex; align-items: center; gap: 8px; }
.site-footer li a:hover { color: var(--text); }
.social-list .icon { width: 16px; height: 16px; }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 20px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: var(--muted); font-size: 14px;
}

/* Responsive */
@media (max-width: 900px) {
  .card-grid, .card-grid.small { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .header-socials { display: none; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .card-grid, .card-grid.small { grid-template-columns: 1fr; }
  .repo-grid { grid-template-columns: 1fr; }
  .site-nav a { padding: 8px 8px; font-size: 14px; }
  .header-inner { gap: 8px; }
  .logo-text { display: none; }
  .hero { padding: 48px 0 32px; }
  .search-box { margin-left: 0; width: 100%; }
  .post-nav { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}