/* layout.css — header, nav, footer, grids (RTL) */

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(28, 8, 16, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background var(--t-fast), border-color var(--t-fast);
}
.site-header.scrolled {
  background: rgba(22, 6, 12, 0.95);
  border-color: var(--line-strong);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  font-size: 1.18rem;
  color: var(--sand-100);
  white-space: nowrap;
}
.brand:hover { color: var(--sand-100); }
.brand .brand-mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
}
.brand small {
  display: block;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  list-style: none;
}
.nav-links a {
  display: inline-block;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-dim);
  position: relative;
}
.nav-links a:hover { color: var(--sand-100); background: rgba(151, 40, 63, 0.22); }
.nav-links a.active { color: var(--sand-100); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  inset-inline: 0.85rem;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--burgundy-400), var(--sand-400));
  border-radius: 2px;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 2px;
  background: var(--sand-200);
  left: 50%;
  transform: translateX(-50%);
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav-toggle span { top: 50%; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: translateX(-50%) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { top: 0; transform: translateX(-50%) rotate(-45deg); }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, transparent, rgba(42, 13, 20, 0.7));
  border-top: 1px solid var(--line);
  padding-block: clamp(2.5rem, 5vw, 4rem) 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}
.footer-col h4 {
  font-size: 0.95rem;
  color: var(--sand-200);
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}
.footer-col ul { list-style: none; }
.footer-col li + li { margin-top: 0.6rem; }
.footer-col a { color: var(--text-dim); font-size: 0.94rem; }
.footer-col a:hover { color: var(--sand-100); }
.footer-about p { font-size: 0.94rem; margin-top: 0.9rem; }
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--sand-100);
}
.footer-brand .brand-mark { width: 34px; height: 34px; }

.footer-social {
  display: flex;
  gap: 0.6rem;
  margin-top: 1.2rem;
}
.footer-social a {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--sand-300);
  transition: transform var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.footer-social a:hover {
  transform: translateY(-3px);
  border-color: var(--sand-400);
  color: var(--sand-100);
}
.footer-social svg { width: 20px; height: 20px; }

.footer-bottom {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  font-size: 0.85rem;
  color: var(--text-faint);
}
.footer-bottom a { color: var(--text-faint); }
.footer-bottom a:hover { color: var(--sand-200); }
.footer-legal { display: flex; gap: 1.2rem; flex-wrap: wrap; }

/* ---------- Generic grids ---------- */
.grid {
  display: grid;
  gap: var(--gap);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

/* Article layout */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.article-aside {
  position: sticky;
  top: 100px;
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-about { grid-column: 1 / -1; }
  .article-layout { grid-template-columns: 1fr; }
  .article-aside { position: static; }
}

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line-strong);
    padding: 0.6rem clamp(1.1rem, 4vw, 2.4rem) 1.2rem;
    box-shadow: var(--shadow);
    transform: translateY(-130%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--t), opacity var(--t);
    max-height: calc(100vh - 76px);
    overflow-y: auto;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    padding: 0.85rem 0.6rem;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { background: rgba(151, 40, 63, 0.25); }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: flex-start; }
}