/* Mobile navigation — hamburger burger + full-screen overlay.
   Pattern: gontenbad.ch (asymmetric 3-line burger, X-morph) + swiss-design canon
   (massive type overlay, hairline dividers, staggered reveal). */

/* Burger button — hidden on desktop, visible on mobile.
   Visual icon = 28×18 (matches logo height). Padding extends hit area to 48×44
   for a11y, doesn't grow visible icon. */
.mn-burger {
  display: none;
  position: relative;
  width: 28px;
  height: 18px;
  padding: 13px 10px;
  box-sizing: content-box;
  border: 0;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  z-index: 1001;
}
/* 2026 sexy burger animation: stagger-collapse-converge with spring overshoot.
   Idle → hover: wave-aligned reveal (line 2 then line 3 grow with delay).
   Idle → open: middle scales-X to 0 first, top+bottom converge to center with
   slight overshoot, all using iOS-style spring bezier. */
.mn-burger span {
  position: absolute;
  left: 10px;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
  transform-origin: center;
  transition:
    top 480ms cubic-bezier(0.34, 1.56, 0.64, 1),
    width 380ms cubic-bezier(0.32, 0.72, 0, 1),
    transform 480ms cubic-bezier(0.34, 1.56, 0.64, 1),
    opacity 160ms ease-out;
}
.mn-burger span:nth-child(1) { top: 13px; width: 28px; }
.mn-burger span:nth-child(2) { top: 21px; width: 14px; transform-origin: left; }
.mn-burger span:nth-child(3) { top: 29px; width: 22px; }

/* Hover wave — staggered alignment. */
.mn-burger:hover span:nth-child(2) { width: 28px; transition-delay: 30ms; }
.mn-burger:hover span:nth-child(3) { width: 28px; transition-delay: 80ms; }

/* Open state — middle collapses first, then top + bottom converge into X. */
.mn-burger[aria-expanded="true"] span:nth-child(1) {
  top: 21px; width: 28px;
  transform: rotate(45deg);
  transition-delay: 120ms;
}
.mn-burger[aria-expanded="true"] span:nth-child(2) {
  width: 0;
  opacity: 0;
  transition-delay: 0ms;
}
.mn-burger[aria-expanded="true"] span:nth-child(3) {
  top: 21px; width: 28px;
  transform: rotate(-45deg);
  transition-delay: 120ms;
}

/* Closing — reverse stagger: lines uncross first, middle fades back in last. */
.mn-burger:not([aria-expanded="true"]) span:nth-child(2) {
  transition-delay: 240ms;
}

/* Burger on dark backgrounds — atmosphere--dark sections never sit above the header
   on these pages, but expose a modifier for safety. */
.mn-burger.is-on-dark span { background: var(--paper); }

/* Full-screen overlay — paper substrate, slide-in from right.
   Editorial column rhythm: list constrained to 520px max, content left-aligned
   inside generous outer padding. Swiss canon — type carries the design. */
.mn-overlay {
  position: fixed;
  inset: 0;
  background: var(--paper);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: calc(var(--space-3xl) + 16px) clamp(1.5rem, 7vw, 3rem) var(--space-2xl);
  transform: translateX(100%);
  transition: transform 500ms var(--ease-spring);
  visibility: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.mn-overlay.is-open {
  transform: translateX(0);
  visibility: visible;
}

.mn-overlay-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 520px;
  width: 100%;
  display: flex;
  flex-direction: column;
  border-top: 1px solid rgba(26, 26, 26, 0.07);
  counter-reset: mn-item;
}
.mn-overlay-list li {
  border-bottom: 1px solid rgba(26, 26, 26, 0.07);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 400ms var(--ease-soft), transform 400ms var(--ease-spring);
  counter-increment: mn-item;
}

.mn-overlay-list a {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  align-items: baseline;
  gap: var(--space-sm);
  padding: 1.05rem 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--ink);
  text-decoration: none;
  transition: color 200ms var(--ease-spring), padding-left 280ms var(--ease-spring);
}
.mn-overlay-list a::before {
  content: counter(mn-item, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  font-variant-numeric: tabular-nums;
  color: rgba(26, 26, 26, 0.45);
  align-self: baseline;
  padding-top: 0.4rem;
  transition: color 200ms;
}
.mn-overlay-list a::after {
  content: '→';
  font-size: var(--text-base);
  font-weight: 400;
  opacity: 0.18;
  flex-shrink: 0;
  align-self: center;
  transition: opacity 200ms, transform 280ms var(--ease-spring), color 200ms;
}
.mn-overlay-list a:hover,
.mn-overlay-list a:focus-visible {
  padding-left: 6px;
}
.mn-overlay-list a:hover::after,
.mn-overlay-list a:focus-visible::after {
  opacity: 1;
  transform: translateX(6px);
}
.mn-overlay-list a[aria-current="page"],
.mn-overlay-list a[aria-current="page"]:hover,
.mn-overlay-list a[aria-current="page"]:focus-visible { color: var(--swiss-red); }
.mn-overlay-list a[aria-current="page"]::before { color: var(--swiss-red); }
.mn-overlay-list a[aria-current="page"]::after { opacity: 1; color: var(--swiss-red); }

/* Staggered reveal — runs when .is-open is set. */
.mn-overlay.is-open .mn-overlay-list li { opacity: 1; transform: none; }
.mn-overlay.is-open .mn-overlay-list li:nth-child(1) { transition-delay: 140ms; }
.mn-overlay.is-open .mn-overlay-list li:nth-child(2) { transition-delay: 200ms; }
.mn-overlay.is-open .mn-overlay-list li:nth-child(3) { transition-delay: 260ms; }
.mn-overlay.is-open .mn-overlay-list li:nth-child(4) { transition-delay: 320ms; }
.mn-overlay.is-open .mn-overlay-list li:nth-child(5) { transition-delay: 380ms; }
.mn-overlay.is-open .mn-overlay-list li:nth-child(6) { transition-delay: 440ms; }

.mn-overlay-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  align-self: flex-start;
  margin-top: var(--space-lg);
  padding: 0.6rem 0.6rem 0.6rem 1.5rem;
  background: var(--swiss-red);
  color: var(--paper);
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  min-height: 3.25rem;
  text-decoration: none;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 400ms var(--ease-soft), transform 400ms var(--ease-spring), background 200ms var(--ease-spring);
}
.mn-overlay-cta:hover { background: var(--wine); }
.mn-overlay-cta .arrow {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--dur-medium) var(--ease-spring);
}
.mn-overlay-cta:hover .arrow { transform: translateX(3px) rotate(45deg); }
.mn-overlay-cta .arrow svg { width: 14px; height: 14px; }
.mn-overlay.is-open .mn-overlay-cta { opacity: 1; transform: none; transition-delay: 500ms; }

/* Body scroll lock when overlay is open. */
html.mn-open, html.mn-open body { overflow: hidden; }

/* Show burger + hide desktop nav under 768px. */
@media (max-width: 767px) {
  .mn-burger { display: block; }
  .site-nav { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  .mn-burger span,
  .mn-overlay,
  .mn-overlay-list li,
  .mn-overlay-list a,
  .mn-overlay-list a::after {
    transition-duration: 1ms !important;
  }
}