/* PAGE HEADER */
.page-header-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(124,58,237,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(124,58,237,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 100% 100% at 100% 50%, black 30%, transparent 100%);
}
.page-tag { color: var(--accent2); }
.page-tag::before { background: var(--accent2); }

/* FILTER */
.filter-btn:hover, .filter-btn.active { border-color: var(--accent2); color: var(--accent2); background: rgba(124,58,237,0.05); }

/* FEATURED ARTICLE */
.featured-article {
  padding: 3rem 4rem; border-bottom: 1px solid var(--border);
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center;
  background: var(--bg2); text-decoration: none; color: inherit; transition: background 0.2s;
}
.featured-article:hover { background: var(--bg3); }

.featured-pin {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 0.68rem; color: var(--accent2);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem;
}
.featured-pin::before { content: '📌'; font-size: 0.8rem; }

.featured-title { font-size: clamp(1.4rem, 2.5vw, 2rem); font-weight: 800; letter-spacing: -0.01em; line-height: 1.2; margin-bottom: 1rem; transition: color 0.2s; }
.featured-article:hover .featured-title { color: var(--accent); }
.featured-excerpt { font-size: 0.95rem; color: var(--muted); line-height: 1.7; margin-bottom: 1.5rem; }
.featured-meta { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }

.article-tag {
  display: inline-block; font-family: var(--mono); font-size: 0.65rem;
  color: var(--accent2); letter-spacing: 0.1em; text-transform: uppercase;
  border: 1px solid rgba(124,58,237,0.35); padding: 0.2rem 0.6rem;
}
.article-date { font-family: var(--mono); font-size: 0.7rem; color: var(--muted); }
.read-time { font-family: var(--mono); font-size: 0.7rem; color: var(--muted); }

.featured-right {
  aspect-ratio: 16/9; background: var(--bg3); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}

.code-graphic {
  font-family: var(--mono); font-size: 0.72rem; color: rgba(0,229,255,0.4);
  line-height: 1.8; padding: 1.5rem; width: 100%;
}
.code-graphic .kw { color: rgba(124,58,237,0.8); }
.code-graphic .fn { color: rgba(0,229,255,0.7); }
.code-graphic .str { color: rgba(80,200,100,0.7); }
.code-graphic .cm { color: rgba(255,255,255,0.2); }

/* ARTICLES LIST */
.articles-container { padding: 0 4rem 5rem; }
.articles-list { display: flex; flex-direction: column; margin-top: 2.5rem; }

.article-item {
  display: grid; grid-template-columns: 3rem 1fr auto;
  align-items: flex-start; gap: 1.5rem;
  padding: 1.8rem 0; border-bottom: 1px solid var(--border);
  text-decoration: none; color: inherit; position: relative; transition: background 0.2s;
}
.article-item::before {
  content: ''; position: absolute; left: -4rem; right: -4rem; top: 0; bottom: 0;
  background: rgba(255,255,255,0.015); opacity: 0; transition: opacity 0.2s;
}
.article-item:hover::before { opacity: 1; }

.article-num { font-family: var(--mono); font-size: 0.68rem; color: var(--muted); padding-top: 0.3rem; }
.article-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.article-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.45rem; transition: color 0.2s; line-height: 1.3; }
.article-item:hover .article-title { color: var(--accent); }
.article-excerpt { font-size: 0.86rem; color: var(--muted); line-height: 1.6; }
.article-right { display: flex; flex-direction: column; align-items: flex-end; gap: 0.5rem; padding-top: 0.3rem; min-width: 80px; }
.read-time-sm { font-family: var(--mono); font-size: 0.65rem; color: var(--muted); white-space: nowrap; }
.article-arrow { font-size: 1.1rem; color: var(--muted); transition: all 0.2s; margin-top: auto; }
.article-item:hover .article-arrow { color: var(--accent); transform: translateX(4px); }

/* RESPONSIVE */
@media (max-width: 768px) {
  .articles-container { padding-left: 1.5rem; padding-right: 1.5rem; padding-bottom: 3rem; }
  .featured-article { grid-template-columns: 1fr; padding: 2rem 1.5rem; gap: 1.5rem; }
  .featured-right { display: none; }
  .article-item { grid-template-columns: 2rem 1fr; gap: 1rem; }
  .article-right { display: none; }
}

@media (max-width: 480px) {
  .article-item { grid-template-columns: 1fr; }
  .article-num { display: none; }
  .featured-title { font-size: 1.3rem; }
}