/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}
@media (min-width: 640px)  { .container { padding-inline: var(--space-6); } }
@media (min-width: 1024px) { .container { padding-inline: var(--space-8); } }

/* Section spacing */
.section {
  padding-block: var(--space-16);
}
@media (min-width: 768px) {
  .section { padding-block: var(--space-24); }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--dur-base) var(--ease-gentle),
              backdrop-filter var(--dur-base) var(--ease-gentle),
              border-color var(--dur-base) var(--ease-gentle);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: var(--bg-overlay);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border-subtle);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--text-primary);
  font-weight: var(--weight-semibold);
}
.brand:hover { color: var(--text-primary); }
.brand svg { width: 28px; height: 28px; }

.nav-primary { display: none; }
@media (min-width: 1024px) {
  .nav-primary {
    display: flex;
    align-items: center;
    gap: var(--space-8);
  }
  .nav-primary a {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    letter-spacing: 0.01em;
  }
  .nav-primary a:hover { color: var(--text-primary); }
}

.header-cta { display: none; }
@media (min-width: 1024px) { .header-cta { display: inline-flex; } }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
@media (min-width: 1024px) { .nav-toggle { display: none; } }
.nav-toggle svg { width: 22px; height: 22px; }

/* Mobile overlay nav */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--gradient-night-sky);
  z-index: 200;
  padding: var(--space-8) var(--space-6);
  transform: translateY(-100%);
  transition: transform var(--dur-base) var(--ease-dreamy);
  display: flex;
  flex-direction: column;
}
.nav-overlay[data-open="true"] { transform: translateY(0); }
.nav-overlay__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-12);
}
.nav-overlay ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.nav-overlay a {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  color: var(--text-primary);
}
.nav-overlay .btn { margin-top: var(--space-8); align-self: flex-start; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding-block: var(--space-16) var(--space-8);
  margin-top: var(--space-24);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-brand p { color: var(--text-muted); font-size: var(--text-sm); }
.footer-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
  justify-content: flex-start;
}
@media (min-width: 768px) { .footer-nav ul { justify-content: center; } }
.footer-nav a { color: var(--text-secondary); font-size: var(--text-sm); }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: var(--text-sm);
}
@media (min-width: 768px) { .footer-contact { text-align: right; } }
.footer-bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-xs);
}

/* Grid helpers */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}