/* ==========================================================
   Aura Beauty — layout.css
   Page shell, header, navigation, sections, footer.
   ========================================================== */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}

.shell--narrow { max-width: 860px; }

main { display: block; position: relative; z-index: 1; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 33, 25, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule-soft);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
}
.site-header.is-scrolled {
  background: rgba(10, 33, 25, 0.96);
  border-bottom-color: var(--rule);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 78px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--cream);
}
.brand svg { width: 42px; height: 42px; flex: none; }
.brand-name {
  font-family: var(--display);
  font-size: 1.22rem;
  letter-spacing: 0.14em;
  line-height: 1;
}
.brand-tag {
  display: block;
  font-family: var(--body);
  font-size: 0.58rem;
  letter-spacing: 0.3em;
  color: var(--cream-faint);
  margin-top: 5px;
}

/* ---------- Navigation ---------- */
.nav { display: flex; align-items: center; gap: clamp(1rem, 2.2vw, 2rem); }

.nav a {
  color: var(--cream-dim);
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  padding: 0.4rem 0;
  position: relative;
  transition: color 0.25s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1px;
  background: var(--gold);
  transition: right 0.35s var(--ease);
}
.nav a:hover, .nav a:focus-visible { color: var(--cream); }
.nav a:hover::after { right: 0; }
.nav a[aria-current="page"] { color: var(--gold-light); }
.nav a[aria-current="page"]::after { right: 0; background: var(--gold); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  background: none;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 20px; height: 1px;
  background: var(--gold-light);
  margin-inline: auto;
  transition: transform 0.3s var(--ease), opacity 0.2s linear;
}
.nav-toggle span { position: relative; }
.nav-toggle span::before { content: ""; position: absolute; top: -6px; }
.nav-toggle span::after  { content: ""; position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Sections ---------- */
.section { padding-block: clamp(4rem, 9vw, 7.5rem); }
.section--tight { padding-block: clamp(2.75rem, 6vw, 4.5rem); }
.section--panel { background: var(--emerald); border-block: 1px solid var(--rule-soft); }

.section-head { margin-bottom: clamp(2rem, 4vw, 3.25rem); max-width: 56ch; }
.section-head p { color: var(--cream-dim); }

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.split--reverse > *:first-child { order: 2; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 2.5vw, 2rem);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.5rem, 3vw, 2.75rem);
}

/* ---------- Footer ---------- */
.site-footer {
  background: #071A13;
  border-top: 1px solid var(--rule);
  padding-block: clamp(3rem, 6vw, 4.5rem) 1.75rem;
  position: relative;
  z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: start;
}
.footer-grid h4 {
  color: var(--gold-light);
  font-family: var(--body);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  font-weight: 400;
  margin-bottom: 1.1rem;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 0.5rem; }
.footer-grid a, .footer-grid p { color: var(--cream-dim); font-size: 0.92rem; }
.footer-grid a:hover { color: var(--gold-light); }
.footer-grid p { margin-bottom: 0.5rem; }

.footer-base {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--cream-faint);
}