/* ELVARIS SOFTWARE LTD — layout.css
   Containers, header, footer, structural grids, section rhythm */

.container {
  width: 100%;
  max-width: 1340px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3.25rem);
}

.container--narrow { max-width: 880px; }
.container--wide { max-width: 1560px; }

section { position: relative; }

.section { padding-block: clamp(3.75rem, 8.5vw, 7.5rem); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4.25rem); }
.section--flush-top { padding-top: 0; }

/* Section head */
.section-head {
  max-width: 48rem;
  margin-bottom: clamp(2rem, 4.5vw, 3.25rem);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.65em;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.15em;
  font-weight: 500;
}

.section-kicker::before {
  content: "";
  width: 26px;
  height: 1.5px;
  background: currentColor;
  display: inline-block;
  flex-shrink: 0;
}

.on-dark .section-kicker { color: var(--luminous); }

/* Oversized editorial section index */
.section-index {
  position: absolute;
  top: clamp(1.5rem, 4vw, 3rem);
  right: clamp(1.25rem, 4vw, 3.25rem);
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 9vw, 8rem);
  line-height: 1;
  font-weight: 600;
  color: transparent;
  -webkit-text-stroke: 1px color-mix(in srgb, var(--ink) 12%, transparent);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.on-dark .section-index {
  -webkit-text-stroke-color: rgba(246, 243, 236, 0.13);
}

.section > .container { position: relative; z-index: 1; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 600;
  background: rgba(246, 243, 236, 0.82);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid rgba(14, 16, 22, 0.07);
  transition: background var(--dur-mid) var(--ease-out),
              border-color var(--dur-mid) var(--ease-out),
              transform var(--dur-mid) var(--ease-out);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1.5rem;
}

/* Overlay mode over a dark cinematic hero */
.site-header--overlay {
  position: fixed;
  left: 0; right: 0; top: 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom-color: transparent;
}

.site-header--overlay .logo,
.site-header--overlay .primary-nav__list a {
  color: rgba(246, 243, 236, 0.9);
}
.site-header--overlay .primary-nav__list a[aria-current="page"] { color: var(--white); }
.site-header--overlay .logo .wordmark { color: var(--white); }
.site-header--overlay .btn-primary {
  background: rgba(246, 243, 236, 0.12);
  border-color: rgba(246, 243, 236, 0.35);
  color: var(--white);
  backdrop-filter: blur(6px);
}
.site-header--overlay .btn-primary:hover {
  background: var(--white);
  border-color: var(--white);
  color: var(--ink);
}
.site-header--overlay .menu-toggle {
  background: rgba(246, 243, 236, 0.14);
  color: var(--white);
  border: 1px solid rgba(246, 243, 236, 0.3);
  backdrop-filter: blur(6px);
}

/* Solid state once scrolled past hero */
.site-header--overlay.is-solid {
  background: rgba(246, 243, 236, 0.9);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom-color: rgba(14, 16, 22, 0.08);
}
.site-header--overlay.is-solid .logo,
.site-header--overlay.is-solid .logo .wordmark { color: var(--ink); }
.site-header--overlay.is-solid .primary-nav__list a { color: var(--graphite); }
.site-header--overlay.is-solid .primary-nav__list a[aria-current="page"] { color: var(--cobalt-dark); }
.site-header--overlay.is-solid .btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--ivory);
  backdrop-filter: none;
}
.site-header--overlay.is-solid .btn-primary:hover {
  background: var(--cobalt-dark);
  border-color: var(--cobalt-dark);
}
.site-header--overlay.is-solid .menu-toggle {
  background: var(--ink);
  color: var(--ivory);
  border-color: var(--ink);
}

.primary-nav { display: flex; align-items: center; }

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 1.9vw, 1.9rem);
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: none;
}

.primary-nav__list li { margin: 0; }

.primary-nav__list a {
  color: var(--graphite);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.925rem;
  letter-spacing: -0.005em;
  padding: 0.4em 0.1em;
  position: relative;
  white-space: nowrap;
  transition: color var(--dur-fast);
}

.primary-nav__list a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0.05em;
  height: 1.5px;
  background: currentColor;
  transition: right var(--dur-mid) var(--ease-out);
}

.primary-nav__list a:hover::after,
.primary-nav__list a[aria-current="page"]::after { right: 0; }
.primary-nav__list a[aria-current="page"] { color: var(--cobalt-dark); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(246, 243, 236, 0.72);
  padding-block: clamp(3.5rem, 6.5vw, 5.5rem) 2rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cobalt), var(--violet), var(--vermilion), transparent);
  opacity: 0.7;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(2rem, 4vw, 3.25rem);
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(246, 243, 236, 0.13);
}

.footer-grid > div { min-width: 0; }
.footer-brand p { color: rgba(246, 243, 236, 0.62); max-width: 34ch; font-size: 0.94rem; }

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--luminous);
  margin-bottom: 1.25em;
  font-weight: 500;
}

.footer-list { list-style: none; padding: 0; margin: 0; max-width: none; }
.footer-list li { margin-bottom: 0.7em; font-size: 0.92rem; line-height: 1.5; }

.footer-list a {
  color: rgba(246, 243, 236, 0.7);
  text-decoration: none;
  transition: color var(--dur-fast);
  position: relative;
}
.footer-list a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.85rem;
  font-size: 0.84rem;
  color: rgba(246, 243, 236, 0.5);
}
.footer-bottom p { max-width: none; margin: 0; color: inherit; }

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: none;
}
.footer-bottom-links li { margin: 0; }
.footer-bottom-links a { color: rgba(246, 243, 236, 0.5); text-decoration: none; }
.footer-bottom-links a:hover { color: var(--white); }

/* ---------- Generic grids ---------- */
.grid {
  display: grid;
  gap: clamp(1.25rem, 2.5vw, 2rem);
  grid-template-columns: repeat(var(--cols, 2), minmax(0, 1fr));
}
.grid > * { min-width: 0; }

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 4.5vw, 4rem);
  align-items: start;
}

/* Asymmetric editorial split */
.split-editorial {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(1.75rem, 4.5vw, 4rem);
  align-items: start;
}

.split-editorial--reverse {
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
}

@media (max-width: 900px) {
  .split-editorial,
  .split-editorial--reverse { grid-template-columns: minmax(0, 1fr); }
}

.prose { max-width: var(--measure); min-width: 0; }
.prose--narrow { max-width: var(--measure-narrow); }

/* Sticky sidebar layout */
.with-sidebar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
  gap: clamp(2rem, 4.5vw, 4rem);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  min-width: 0;
}

@media (max-width: 940px) {
  .with-sidebar { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: static; }
}

/* Sticky section label rail */
.sticky-label {
  position: sticky;
  top: calc(var(--header-h) + 2rem);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Diagonal section cut */
.cut-top {
  clip-path: polygon(0 2.5vw, 100% 0, 100% 100%, 0 100%);
  margin-top: -2.5vw;
  padding-top: calc(clamp(3.75rem, 8.5vw, 7.5rem) + 2.5vw);
}

/* Full-bleed image strip */
.image-strip {
  position: relative;
  height: clamp(220px, 34vw, 420px);
  overflow: hidden;
}
.image-strip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
}
.image-strip__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14,16,22,0.55), rgba(14,16,22,0.28) 45%, rgba(14,16,22,0.62));
}
.image-strip__content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
}