/* =============================================
   CODESQUAD BLOG PAGE
   Separate from main 3D site — normal scroll
   ============================================= */

:root {
  --bg:      #050510;
  --cyan:    #00D4FF;
  --violet:  #7B2FFF;
  --green:   #00FF88;
  --white:   #FFFFFF;
  --gray:    #8892A4;
  --gray2:   #4a5568;
  --border:  rgba(0, 212, 255, 0.15);
  --border2: rgba(255, 255, 255, 0.06);
  --font-h:  'Sora', sans-serif;
  --font-b:  'Inter', sans-serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-b);
  overflow-x: hidden;
  min-height: 100vh;
}

/* ── Scroll progress ───────────────────────── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px; width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--green));
  z-index: 200;
  transition: width 0.05s linear;
}

/* ── Canvas ────────────────────────────────── */
#bg-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

/* ── Navigation ────────────────────────────── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 56px;
  background: linear-gradient(to bottom, rgba(5,5,16,0.96) 0%, rgba(5,5,16,0) 100%);
  backdrop-filter: blur(8px);
}

.nav-logo {
  font-family: var(--font-h);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  color: var(--white);
}

.logo-bracket { color: var(--cyan); }
.logo-text    { margin-left: 4px; letter-spacing: -0.5px; }

.nav-links {
  display: flex;
  gap: 36px;
}

.nav-links a {
  color: var(--gray);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: color 0.25s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--cyan); }

.nav-cta {
  padding: 10px 24px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--cyan);
  font-family: var(--font-h);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.nav-cta:hover {
  background: rgba(0,212,255,0.08);
  border-color: var(--cyan);
  box-shadow: 0 0 20px rgba(0,212,255,0.25);
}

/* ── Main ──────────────────────────────────── */
main {
  position: relative;
  z-index: 10;
  padding-top: 90px;
}

/* ── Hero ──────────────────────────────────── */
.blog-hero {
  text-align: center;
  padding: 80px 56px 56px;
  max-width: 820px;
  margin: 0 auto;
}

.eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
}

.dot-pulse {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

.blog-hero h1 {
  font-family: var(--font-h);
  font-size: clamp(30px, 5vw, 60px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 20px;
}

.grad-text {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 16px;
  color: var(--gray);
  line-height: 1.75;
  max-width: 580px;
  margin: 0 auto;
}

/* ── Grid ──────────────────────────────────── */
.blog-section {
  padding: 0 56px 120px;
  max-width: 1200px;
  margin: 0 auto;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card.featured { grid-column: span 2; }

/* ── Card ──────────────────────────────────── */
.blog-card {
  position: relative;
  padding: 28px;
  border: 1px solid var(--border2);
  border-radius: 14px;
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  opacity: 0;
  transform: translateY(24px);
  transition: border-color 0.3s, transform 0.35s, box-shadow 0.3s, opacity 0.4s;
  overflow: hidden;
}

.blog-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.blog-card:hover {
  border-color: var(--border);
  transform: translateY(-5px);
  box-shadow: 0 24px 60px rgba(0,212,255,0.07);
}

.blog-card:hover::before { opacity: 1; }

.card-cat {
  display: inline-block;
  align-self: flex-start;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
}

.cat-business { background: rgba(0,212,255,0.08); color: var(--cyan);   border: 1px solid rgba(0,212,255,0.2); }
.cat-product  { background: rgba(123,47,255,0.08); color: var(--violet); border: 1px solid rgba(123,47,255,0.2); }
.cat-local    { background: rgba(0,255,136,0.08);  color: var(--green);  border: 1px solid rgba(0,255,136,0.2); }
.cat-tech     { background: rgba(0,212,255,0.08);  color: var(--cyan);   border: 1px solid rgba(0,212,255,0.2); }

.blog-card h2 {
  font-family: var(--font-h);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.3px;
  flex: 1;
}

.blog-card.featured h2 { font-size: 22px; }

.blog-card p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.65;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border2);
}

.read-time {
  font-size: 11px;
  color: var(--gray2);
  font-weight: 500;
}

.read-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  text-decoration: none;
  transition: letter-spacing 0.2s;
}

.read-link:hover { letter-spacing: 0.5px; }

/* ── Footer ────────────────────────────────── */
#footer {
  position: relative;
  z-index: 10;
  border-top: 1px solid var(--border2);
  padding: 24px 56px;
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  color: var(--gray2);
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-h);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--white);
}

.footer-brand { margin-left: 4px; }
.footer-sep   { color: var(--border); }

/* ── Mobile ────────────────────────────────── */
@media (max-width: 768px) {
  #nav { padding: 12px 18px; }
  .nav-links { display: none; }
  .nav-cta { padding: 7px 14px; font-size: 11px; }

  .blog-hero { padding: 56px 18px 36px; }
  .blog-hero h1 { font-size: clamp(24px, 7vw, 32px); letter-spacing: -1px; }
  .hero-sub { font-size: 13px; }

  .blog-section { padding: 0 18px 60px; }
  .blog-grid { grid-template-columns: 1fr; gap: 16px; }
  .blog-card.featured { grid-column: span 1; }
  .blog-card.featured h2 { font-size: 17px; }

  #footer { padding: 18px; }
}