:root {
  --bg: #0a0e1a;
  --bg-2: #121829;
  --bg-card: #1a2238;
  --fg: #e4e8f0;
  --fg-dim: #a8b0c3;
  --accent: #06b6d4;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Hero */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 80px 20px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(135deg, rgba(10,14,26,0.78), rgba(6,182,212,0.25)),
    url('https://images.unsplash.com/photo-1677442136019-21780ecad995?w=1920&h=1080&fit=crop');
  background-size: cover;
  background-position: center;
  filter: saturate(1.05);
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}
.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #67e8f9, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--fg-dim);
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}
.stat {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 28px;
  backdrop-filter: blur(12px);
}
.stat-num {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: #67e8f9;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--fg-dim);
}

/* Filter Nav */
.filter-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10,14,26,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.filter-btn {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
.filter-btn:hover { color: var(--fg); border-color: var(--accent); }
.filter-btn.active {
  background: linear-gradient(135deg, #06b6d4, #8b5cf6);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
}

/* Section */
.section { padding: 64px 20px; max-width: 1200px; margin: 0 auto; }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 8px;
  text-align: center;
}
.section-sub {
  text-align: center;
  color: var(--fg-dim);
  margin-bottom: 40px;
}

/* Tool Grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.tool-card {
  position: relative;
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}
.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
  text-decoration: none;
}
.card-arrow {
  display: inline-block;
  font-size: 0.85em;
  color: var(--accent);
  margin-left: 6px;
  opacity: 0.6;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.tool-card:hover .card-arrow {
  transform: translate(2px, -2px);
  opacity: 1;
}
.card-accent {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent, #06b6d4);
}
.tool-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--fg);
}
.card-desc {
  font-size: 0.92rem;
  color: var(--fg-dim);
  margin-bottom: 14px;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  font-size: 0.75rem;
  background: rgba(255,255,255,0.06);
  color: var(--fg-dim);
  border-radius: 999px;
  padding: 3px 10px;
}

/* Blog Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.2s ease;
  display: flex;
  flex-direction: column;
}
.blog-card:hover { transform: translateY(-4px); }
.blog-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}
.blog-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.blog-card h3 {
  font-size: 1.08rem;
  margin-bottom: 8px;
}
.blog-card h3 a { color: var(--fg); }
.blog-card-meta {
  font-size: 0.78rem;
  color: var(--fg-dim);
  margin-bottom: 10px;
}
.blog-card p {
  font-size: 0.88rem;
  color: var(--fg-dim);
  flex: 1;
}
.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px;
  color: var(--fg-dim);
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: 16px;
}

/* Promo */
.promo-section { padding-top: 40px; }
.promo-card {
  background: linear-gradient(135deg, rgba(139,92,246,0.15), rgba(6,182,212,0.15));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  text-align: center;
}
.promo-card h2 { margin-bottom: 12px; }
.promo-card p { color: var(--fg-dim); margin-bottom: 24px; }
.promo-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}
.promo-btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease;
}
.promo-btn:hover { transform: translateY(-2px); text-decoration: none; }
.x-btn {
  background: #0f172a;
  color: #fff;
  border: 1px solid #334155;
}
.patreon-btn {
  background: linear-gradient(135deg, #ff424d, #ff6b35);
  color: #fff;
}

/* Footer */
.site-footer {
  background: #060912;
  border-top: 1px solid var(--border);
  padding: 48px 20px 24px;
  margin-top: 60px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}
.footer-brand h3 { font-size: 1.2rem; margin-bottom: 6px; }
.footer-brand p { color: var(--fg-dim); font-size: 0.9rem; margin-bottom: 24px; }
.footer-promo {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
}
.promo-label {
  color: #a78bfa;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 10px;
  letter-spacing: 0.1em;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.footer-links a {
  color: var(--fg-dim);
  font-size: 0.9rem;
}
.copyright {
  color: #4b5563;
  font-size: 0.8rem;
}

/* Article page */
.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px;
}
.article-body h1 {
  font-size: 2rem;
  margin: 20px 0 16px;
  line-height: 1.35;
}
.article-body h2 {
  font-size: 1.35rem;
  margin: 32px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--accent);
}
.article-body p { margin: 12px 0; color: var(--fg); }
.article-hero-img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 24px;
}
.article-meta {
  color: var(--fg-dim);
  font-size: 0.85rem;
  margin-bottom: 20px;
}
.back-link {
  display: inline-block;
  margin: 20px 0;
  color: var(--accent);
}

/* Responsive */
@media (max-width: 600px) {
  .section { padding: 40px 16px; }
  .hero { min-height: 50vh; padding: 60px 16px; }
  .stat { padding: 12px 18px; }
  .promo-card { padding: 28px 20px; }
}