/* ========================================
   Site Navigation — hamburger + full-screen panel
   ======================================== */

/* Burger button — left side of the sticky header */
.site-header__burger {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 0;
  cursor: pointer;
  color: var(--theme-text-primary);
  -webkit-tap-highlight-color: transparent;
}

.site-header__burger-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 24px;
  height: 24px;
}

.site-header__burger-line {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}

/* Burger → X */
.site-header__burger[aria-expanded="true"] .site-header__burger-line:first-child {
  transform: translateY(4px) rotate(45deg);
}

.site-header__burger[aria-expanded="true"] .site-header__burger-line:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

@media (hover: hover) and (pointer: fine) {
  .site-header__burger:hover {
    opacity: 0.7;
  }
}

.site-header__burger:focus-visible {
  outline: 2px solid var(--theme-text-primary);
  outline-offset: -4px;
}

/* Panel — sits under the sticky header, covers the viewport */
.site-nav {
  position: fixed;
  inset: 0;
  z-index: 65;
  background: var(--theme-bg);
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-nav[hidden] {
  display: none;
}

.site-nav.is-open {
  opacity: 1;
  transform: translateY(0);
}

.site-nav__inner {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-8);
  max-width: 1024px;
  margin: 0 auto;
  padding: calc(var(--space-13) + var(--space-8)) var(--space-6) var(--space-10);
}

@media (min-width: 768px) {
  .site-nav__inner {
    padding-left: var(--space-10);
    padding-right: var(--space-10);
  }
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: nav;
}

.site-nav__item {
  counter-increment: nav;
  margin: 0;
  border-bottom: 1px solid var(--theme-border-color);
}

.site-nav__item:first-child {
  border-top: 1px solid var(--theme-border-color);
}

.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-5);
  padding: var(--space-4) 0;
  font-size: var(--text-heading);
  font-weight: var(--font-black);
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--theme-text-primary);
  text-decoration: none;
  transition: opacity 0.2s ease, gap 0.2s ease;
}

.site-nav__link::before {
  content: "0" counter(nav);
  font-size: var(--text-body);
  font-weight: var(--font-bold);
  opacity: 0.35;
  flex: none;
}

@media (hover: hover) and (pointer: fine) {
  .site-nav__link:hover {
    color: var(--theme-text-primary);
    gap: var(--space-6);
  }

  .site-nav__link:hover::before {
    opacity: 1;
  }
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--theme-text-primary);
  outline-offset: 4px;
}

/* Phone — the primary action, kept in view at the end of the panel */
.site-nav__phone {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-7);
  border-radius: var(--radius-full);
  background: var(--theme-text-primary);
  color: var(--theme-bg);
  font-size: var(--text-body);
  font-weight: var(--font-bold);
  letter-spacing: -0.015em;
  text-decoration: none;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav__phone::before {
  content: "☎";
  font-weight: var(--font-medium);
}

@media (hover: hover) and (pointer: fine) {
  .site-nav__phone:hover {
    color: var(--theme-bg);
    opacity: 0.9;
    transform: translateY(-2px);
  }
}

/* Body scroll lock while the panel is open */
body.nav-open {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .site-nav,
  .site-nav__link,
  .site-header__burger-line,
  .site-nav__phone {
    transition: none;
  }
}