/* ============================================================
   SINOX API — PAGES / ARTICLES.CSS
   استایل‌های اختصاصی صفحه‌ی فهرست مقالات (articles.html) و صفحه‌ی
   تک‌مقاله (article.html). وابسته به tokens.css + base.css +
   components.css — همیشه بعد از آن‌ها لود شود.
   ============================================================ */

/* ---------- ۱. سربرگ صفحه ---------- */
.art-page-head {
  padding-block: var(--space-14) var(--space-6);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.art-page-head .kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: var(--tracking-mono-wide);
  color: var(--primary);
  direction: ltr;
  text-align: end;
  margin-bottom: 10px;
}
.art-page-head h1 { font-size: var(--fh-h2); }
.art-page-head .art-sub { margin-top: 10px; font-size: var(--fs-md); color: var(--text-muted); max-width: 62ch; }
.art-search { flex: none; width: 300px; max-width: 100%; }

/* ---------- ۲. ردیف فیلتر (سگمنت) ---------- */
.art-filter-row { margin-block: var(--space-2) var(--space-7); }

/* ---------- ۳. کاور — گرادیانت‌های جایگزین وقتی cover_image خالی است ---------- */
.art-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--elev-3);
}
.art-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slower) var(--ease-out);
}
.art-cover .art-cover-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 20px 20px;
}
.art-cover .art-cover-letter {
  position: relative;
  font-family: var(--font-mono);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1;
  user-select: none;
}
.art-cover-g0 { background: linear-gradient(135deg, var(--primary), var(--primary2) 60%, var(--cyan)); }
.art-cover-g1 { background: linear-gradient(135deg, #312e81, var(--primary)); }
.art-cover-g2 { background: linear-gradient(135deg, #0e7490, var(--cyan)); }
.art-cover-g3 { background: linear-gradient(135deg, #4c1d95, var(--primary2)); }
.art-cover-g4 { background: linear-gradient(135deg, #164e63, #0891b2); }
.art-cover-g5 { background: linear-gradient(135deg, #3730a3, var(--primary)); }
.art-cover-g6 { background: linear-gradient(135deg, #065f46, var(--green)); }

.art-type-chip {
  position: absolute;
  top: 12px;
  inset-inline-end: 12px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(7, 7, 15, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-size: 11.5px;
  font-weight: var(--fw-bold);
  color: var(--text-1);
}
.art-video-chip {
  position: absolute;
  bottom: 12px;
  inset-inline-start: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--radius-full);
  background: rgba(7, 7, 15, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-size: 11.5px;
  font-weight: var(--fw-bold);
  color: var(--text-1);
}

/* ---------- ۴. کارت شاخص (Featured) ---------- */
.art-featured {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  border: 1px solid var(--border-1);
  border-radius: var(--radius-2xl);
  background: var(--card);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--dur-base), background var(--dur-base);
}
.art-featured:hover { border-color: var(--primary-border-tint); background: var(--elev-3); }
.art-featured .art-cover .art-cover-letter { font-size: 88px; }
.art-featured-body { padding: var(--space-8) var(--space-7); display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.art-featured-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.art-featured-title { margin-top: var(--space-4); font-size: clamp(20px, 1.6vw + 15px, 27px); font-weight: var(--fw-black); line-height: 1.5; }
.art-featured-summary { margin-top: var(--space-3); font-size: var(--fs-md); line-height: var(--lh-loose); color: var(--text-2); }

@media (max-width: 860px) {
  .art-featured { grid-template-columns: 1fr; }
  .art-featured-body { padding: var(--space-5); }
}

/* ---------- ۵. شبکه‌ی مقالات ---------- */
.art-grid { margin-top: var(--space-5); display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
@media (max-width: 980px) { .art-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .art-grid { grid-template-columns: 1fr; } }

.art-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-1);
  border-radius: var(--radius-2xl);
  background: var(--card);
  overflow: hidden;
  transition: border-color var(--dur-base), background var(--dur-base), transform var(--dur-base) var(--ease-standard);
}
.art-card:hover { border-color: var(--primary-border-tint); background: var(--elev-3); transform: translateY(-4px); }
.art-card:hover .art-cover img,
.art-card:hover .art-cover .art-cover-letter { transform: scale(1.06); }
.art-card:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.art-card-body { padding: var(--space-5); display: flex; flex-direction: column; flex: 1; }
.art-card-title { font-size: var(--fs-xl); font-weight: var(--fw-extrabold); line-height: 1.65; }
.art-card-summary { margin-top: 10px; font-size: var(--fs-base); line-height: var(--lh-loose); color: var(--text-muted); }
.art-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.art-meta {
  margin-top: auto;
  padding-top: var(--space-4);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  font-size: var(--fs-xs);
  color: var(--text-muted);
}
.art-meta .sep { width: 1px; height: 11px; background: var(--border-2); flex-shrink: 0; }
.art-meta .with-icon { display: inline-flex; align-items: center; gap: 5px; }
.art-meta svg { flex-shrink: 0; }

/* ---------- ۶. اسکلتون کارت ---------- */
.art-card-skel .art-cover { background: var(--elev-2); }

/* ---------- ۷. حالت خالی و خطا ---------- */
.art-empty-icon svg { color: var(--border-2); }

/* ---------- ۸. صفحه‌ی تک‌مقاله ---------- */
.art-hero {
  position: relative;
  min-height: 220px;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: var(--space-8);
}
.art-hero .art-hero-dots {
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(7, 7, 15, 0.2) 1px, transparent 1px);
  background-size: 24px 24px;
}
.art-hero .art-hero-shade {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(7, 7, 15, 0.1), rgba(7, 7, 15, 0.92));
}
.art-hero-inner { position: relative; max-width: 840px; }
.art-hero-title { margin-top: 14px; font-size: clamp(24px, 2.4vw + 15px, 38px); font-weight: var(--fw-black); line-height: 1.45; }

.art-layout { margin-top: var(--space-8); display: grid; grid-template-columns: 1fr 220px; gap: var(--space-10); align-items: start; }
@media (max-width: 980px) { .art-layout { grid-template-columns: 1fr; } }

.art-content-col { max-width: 72ch; min-width: 0; }
.art-content-meta {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border-1);
  font-size: 13.5px; color: var(--text-muted);
}
.art-content-meta .with-icon { display: inline-flex; align-items: center; gap: 6px; }
.art-content-meta .art-share-group { margin-inline-start: auto; display: flex; align-items: center; gap: 8px; }

.art-share-btn {
  width: 38px; height: 38px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-1); background: var(--elev-1); color: var(--text-muted);
  transition: background var(--dur-base), border-color var(--dur-base), color var(--dur-base);
}
.art-share-btn:hover { background: var(--elev-2); border-color: var(--border-3); color: var(--text-1); }

.art-content {
  margin-top: var(--space-7);
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-2);
}
.art-content > * + * { margin-top: 1.15em; }
.art-content h2 { margin-top: 1.9em; font-size: var(--fh-h4); display: flex; align-items: center; gap: 10px; scroll-margin-top: 90px; }
.art-content h3 { margin-top: 1.6em; font-size: var(--fs-xl); scroll-margin-top: 90px; }
.art-content p { line-height: 1.9; }
.art-content ul, .art-content ol { padding-inline-start: 1.4em; }
.art-content li + li { margin-top: 0.5em; }
.art-content img { border-radius: var(--radius-xl); }
.art-content a { text-decoration: underline; text-underline-offset: 3px; }
.art-content pre {
  border: 1px solid var(--border-1); border-radius: var(--radius-xl); background: var(--bg2);
  padding: var(--space-5); overflow-x: auto; font-family: var(--font-mono); font-size: 13.5px;
  direction: ltr; text-align: left;
}
.art-content blockquote {
  border-inline-start: 3px solid var(--primary);
  padding-inline-start: var(--space-5);
  color: var(--text-2);
  font-style: normal;
}
.art-video-wrap { position: relative; border-radius: var(--radius-xl); overflow: hidden; aspect-ratio: 16 / 9; background: var(--bg2); }
.art-video-wrap iframe, .art-video-wrap video { width: 100%; height: 100%; border: none; }

/* ---------- ۹. فهرست «در این صفحه» (TOC) ---------- */
.art-toc {
  position: sticky;
  top: var(--space-6);
  border-inline-start: 1px solid var(--border-1);
  padding-inline-start: var(--space-5);
}
.art-toc-label { font-size: 11.5px; font-weight: var(--fw-bold); letter-spacing: 0.04em; color: var(--text-muted); padding-inline: 10px; margin-bottom: 10px; }
.art-toc-list { display: flex; flex-direction: column; gap: 2px; }
.art-toc-link {
  position: relative;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  display: block;
  transition: color var(--dur-base), background var(--dur-base);
}
.art-toc-link:hover { color: var(--text-1); }
.art-toc-link.is-active { color: var(--text-1); font-weight: var(--fw-bold); background: var(--primary-tint); }
.art-toc-link.is-active::before {
  content: ''; position: absolute; top: 8px; bottom: 8px; inset-inline-start: 0;
  width: 2px; border-radius: 2px; background: var(--primary);
}
.art-toc-link.toc-h3 { padding-inline-start: 22px; font-size: 12.5px; }

/* کشوی فهرست موبایل */
.art-toc-mobile-toggle {
  display: none;
  width: 100%; height: 48px;
  align-items: center; justify-content: space-between;
  padding-inline: var(--space-4);
  border: 1px solid var(--border-1); border-radius: var(--radius-lg); background: var(--elev-1);
  font-size: 13.5px; font-weight: var(--fw-bold); color: var(--text-2);
  margin-top: var(--space-6);
}
.art-toc-mobile-panel { display: none; margin-top: 10px; padding: 10px; border: 1px solid var(--border-1); border-radius: var(--radius-lg); background: var(--bg2); }
@media (max-width: 980px) {
  .art-toc { display: none; }
  .art-toc-mobile-toggle { display: flex; }
  .art-toc-mobile-panel.is-open { display: block; }
}

/* ---------- ۱۰. مقالات مرتبط ---------- */
.art-related { margin-top: var(--space-14); padding-top: var(--space-8); border-top: 1px solid var(--border-1); }
.art-related-grid { margin-top: var(--space-5); display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
@media (max-width: 900px) { .art-related-grid { grid-template-columns: 1fr; } }
.related-card {
  display: flex; gap: 14px; padding: 14px;
  border: 1px solid var(--border-1); border-radius: var(--radius-xl); background: var(--bg2);
  transition: border-color var(--dur-base), background var(--dur-base);
}
.related-card:hover { border-color: var(--primary-border-tint); background: var(--elev-2); }
.related-card .art-cover { flex: none; width: 88px; height: 60px; aspect-ratio: auto; border-radius: var(--radius-md); }
.related-card .art-cover .art-cover-letter { font-size: 22px; }
.related-card-body { min-width: 0; }
.related-card-title { font-size: 14.5px; font-weight: var(--fw-bold); line-height: 1.6; }
.related-card-meta { margin-top: 6px; font-size: 12px; color: var(--text-muted); }