/* layout.css — containers, header, footer, grid scaffolding */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

section {
  padding-block: clamp(48px, 8vw, 96px);
}

.section-narrow {
  max-width: 820px;
  margin-inline: auto;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  background: rgba(22, 9, 34, 0.62);
  border-bottom: 1px solid var(--border-glass);
  transition: background var(--t-mid), box-shadow var(--t-mid);
}

.site-header.scrolled {
  background: rgba(22, 9, 34, 0.9);
  box-shadow: 0 10px 40px -20px rgba(0, 0, 0, 0.8);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.16rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand .brand-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
}

.brand small {
  display: block;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--magenta-bright);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links a.active {
  color: #fff;
  background: var(--grad-accent);
  box-shadow: 0 8px 24px -10px var(--magenta);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: var(--t-fast);
}

.nav-toggle span {
  top: 50%;
  margin-top: -1px;
}

.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(48px, 8vw, 90px);
  border-top: 1px solid var(--border-glass);
  background: rgba(13, 5, 21, 0.6);
  backdrop-filter: blur(12px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 2.4rem;
  padding-block: clamp(40px, 6vw, 64px);
}

.footer-grid h4 {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--magenta-bright);
  margin-bottom: 1.1rem;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid li {
  margin-bottom: 0.55rem;
}

.footer-grid a {
  color: var(--text-muted);
  font-size: 0.94rem;
}

.footer-grid a:hover {
  color: var(--magenta-bright);
}

.footer-about p {
  font-size: 0.95rem;
  max-width: 34ch;
}

.footer-social {
  display: flex;
  gap: 0.6rem;
  margin-top: 1rem;
}

.footer-social a {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  transition: var(--t-fast);
}

.footer-social a:hover {
  background: var(--grad-accent);
  color: #fff;
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding-block: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: space-between;
  align-items: center;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.footer-bottom nav {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

/* ---------- Generic grids ---------- */
.grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 960px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }
  .nav-links {
    position: fixed;
    inset: 74px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem var(--gutter) 1.6rem;
    background: rgba(18, 7, 28, 0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    transform: translateY(-130%);
    transition: transform var(--t-mid);
    box-shadow: var(--shadow-soft);
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-links a {
    padding: 0.85rem 1rem;
    font-size: 1rem;
  }
}

@media (max-width: 600px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}