/* ========================================
   Navigation — Shared across all pages
   ======================================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 300ms var(--ease-out),
              background 300ms var(--ease-out);
}

.site-nav.scrolled {
  border-bottom-color: var(--color-border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 200ms var(--ease-out);
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a[aria-current="page"] {
  color: var(--color-text);
}

.nav-links a[aria-current="page"]::after {
  width: 100%;
  background: var(--color-accent);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform 200ms var(--ease-out), opacity 200ms var(--ease-out);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: calc(100vh - 70px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: var(--space-8) var(--space-6);
    gap: var(--space-12);
    background-color: var(--color-bg);
    background-image: none;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 250ms var(--ease-out), visibility 250ms var(--ease-out);
    z-index: 99;
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
  }

  .nav-links a {
    display: block;
    font-size: var(--text-lg);
    font-weight: 500;
    color: #fff;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
  }

  .nav-links a:hover {
    color: var(--color-accent);
  }

  .nav-links a[aria-current="page"] {
    color: var(--color-accent);
    font-weight: 700;
  }
}

/* Page header spacing — push content below fixed nav */
.page-header {
  padding-top: calc(80px + var(--space-16));
  padding-bottom: var(--space-12);
}

.page-header .container-narrow {
  max-width: var(--content-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.page-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.page-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 540px;
}

/* Interior page body */
.page-body {
  padding-bottom: clamp(var(--space-16), 10vw, var(--space-32));
}

.page-body .container-narrow {
  max-width: var(--content-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}