/* ==========================================================================
   overlays.css — §4.7 letter, §4.8 memories, §4.9 flowers, + lightbox
   ========================================================================== */

/* ==========================================================================
   SHELL
   Closed overlays are visibility:hidden — invisible AND untabbable. (§2.3)
   ========================================================================== */
.overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity    var(--dur-slow) var(--ease-premium),
    visibility 0s linear var(--dur-slow);
}
.overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition:
    opacity    var(--dur-slow) var(--ease-premium),
    visibility 0s linear 0s;
}

.overlay--cream { background: linear-gradient(170deg, var(--cream) 0%, var(--cream-dark) 100%); }
.overlay--pink  { background: linear-gradient(170deg, var(--pastel-pink) 0%, var(--cream) 100%); }
.overlay--blush { background: linear-gradient(170deg, var(--blush) 0%, var(--pastel-pink) 55%, var(--cream) 100%); }

.overlay__scroll {
  height: 100%;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: clamp(72px, 12vh, 104px) var(--sp-3) var(--sp-8);
  text-align: center;
}

.overlay__close {
  position: absolute;
  top: max(16px, env(safe-area-inset-top));
  right: 16px;
  z-index: 5;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  cursor: pointer;
  border: 1.5px solid var(--dusty-pink);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .82);
  color: var(--wine);
  box-shadow: var(--shadow-soft);
  transition: transform var(--dur-fast) var(--ease-bounce);
}
.overlay__close:hover { transform: rotate(90deg) scale(1.06); }


/* ==========================================================================
   LETTER (§4.7)
   ========================================================================== */
.letter-stage {
  height: 100%;
  display: grid;
  place-items: center;
  padding: clamp(72px, 11vh, 96px) var(--sp-3) var(--sp-4);
  perspective: 1400px;
}

/* --- envelope --- */
.envelope {
  position: relative;
  grid-area: 1 / 1;
  width: min(400px, 92vw);
  transition:
    opacity   var(--dur-slow) var(--ease-soft),
    transform var(--dur-slow) var(--ease-premium),
    visibility 0s linear var(--dur-slow);
}
.envelope__body { width: 100%; height: auto; }

.envelope__flap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  transform-origin: 50% 4%;
  transform: rotateX(0deg);
  transition: transform 900ms var(--ease-premium);
  backface-visibility: hidden;
}
.envelope__flap svg { width: 100%; height: auto; }

.seal {
  position: absolute;
  top: 46%;
  left: 50%;
  translate: -50% -50%;
  width: 74px;
  height: 74px;
  display: grid;
  place-items: center;
  cursor: pointer;
  border: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, var(--wine), var(--burgundy) 72%);
  box-shadow: var(--shadow-strong), inset 0 -3px 8px rgba(48, 13, 25, .6);
  transition: scale   var(--dur-medium) var(--ease-bounce),
              opacity var(--dur-fast) var(--ease-soft);
  animation: seal-pulse 2.8s var(--ease-soft) infinite;
}
/* scale composes with the base `translate` instead of fighting it — a
   second `transform: translate(...)` here would double the offset and
   make the seal visibly jump away from the cursor on hover. */
.seal:hover { scale: 1.09; }
.seal__mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 30px;
  color: var(--gold-light);
  line-height: 1;
}
@keyframes seal-pulse {
  0%, 100% { box-shadow: var(--shadow-strong), inset 0 -3px 8px rgba(48,13,25,.6), 0 0 0 0 rgba(124, 33, 66, .35); }
  55%      { box-shadow: var(--shadow-strong), inset 0 -3px 8px rgba(48,13,25,.6), 0 0 0 16px rgba(124, 33, 66, 0); }
}

.envelope__hint {
  position: absolute;
  bottom: -38px;
  left: 0;
  width: 100%;
  text-align: center;
  font-family: var(--font-cute);
  font-size: 19px;
  color: var(--wine);
  opacity: .72;
  margin: 0;
  transition: opacity var(--dur-fast) var(--ease-soft);
}

/* --- the open sequence, driven only by classes JS adds on tap --- */
.letter-stage.is-opening .envelope__flap { transform: rotateX(-172deg); }
.letter-stage.is-opening .seal { opacity: 0; scale: .5; animation: none; }
.letter-stage.is-opening .envelope__hint { opacity: 0; }

.letter-stage.is-showing .envelope {
  opacity: 0;
  visibility: hidden;
  transform: translateY(40px) scale(.92);
}

/* --- paper --- */
.paper {
  grid-area: 1 / 1;
  width: min(560px, 94vw);
  max-height: min(76vh, 720px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: clamp(28px, 6vw, 46px);
  text-align: left;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-strong);
  opacity: 0;
  visibility: hidden;
  transform: translateY(56px) scale(.9);
  transition:
    opacity   var(--dur-slow) var(--ease-premium),
    transform var(--dur-slow) var(--ease-premium),
    visibility 0s linear var(--dur-slow);

  /* lined-paper texture */
  background-color: #FFFDF8;
  background-image:
    linear-gradient(to bottom,
      transparent 0,
      transparent 33px,
      rgba(223, 160, 179, .28) 34px),
    linear-gradient(90deg,
      transparent 0,
      transparent 5%,
      rgba(124, 33, 66, .16) 5%,
      rgba(124, 33, 66, .16) calc(5% + 1px),
      transparent calc(5% + 1px));
  background-size: 100% 34px, 100% 100%;
}
.letter-stage.is-showing .paper {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition:
    opacity   var(--dur-slow) var(--ease-premium) 120ms,
    transform var(--dur-slow) var(--ease-premium) 120ms,
    visibility 0s linear 0s;
}

.paper__greeting {
  font-family: var(--font-display);
  font-size: 27px;
  font-weight: 500;
  color: var(--burgundy);
  margin: 0 0 var(--sp-2);
}
.paper__body p {
  font-family: var(--font-display);
  font-size: 17.5px;
  line-height: 34px;               /* sits on the ruled lines */
  color: var(--burgundy);
  margin: 0 0 var(--sp-2);
}
.paper__signoff {
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--burgundy);
  margin: var(--sp-3) 0 4px;
}
.paper__signature {
  font-family: var(--font-cute);
  font-size: 27px;
  color: var(--wine);
  margin: 0;
}
/* U.fillCopy() sets textContent = '' when unset, leaving zero child nodes —
   collapse the line instead of leaving an empty gap under the sign-off. */
.paper__signature:empty { display: none; }


/* ==========================================================================
   MEMORIES — a timeline, not a grid.
   Each entry starts translated/invisible; gallery.js observes it and adds
   .is-in the moment it's actually scrolled into view within the overlay —
   never on load, since the overlay itself starts visibility:hidden and
   IntersectionObserver correctly treats that as "not intersecting."
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 620px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {                 /* the spine */
  content: '';
  position: absolute;
  left: 14px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--dusty-pink), var(--blush));
}

.tl-entry {
  position: relative;
  margin-bottom: var(--sp-6);
  text-align: left;
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity   var(--dur-slow) var(--ease-premium),
    transform var(--dur-slow) var(--ease-premium);
}
.tl-entry:last-child { margin-bottom: 0; }
.tl-entry.is-in { opacity: 1; transform: none; }

.tl-entry__dot {
  position: absolute;
  left: -40px;
  top: 7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--wine);
  box-shadow: 0 0 0 4px var(--cream), 0 0 0 5px var(--dusty-pink);
}

.tl-entry__year {
  display: block;
  font-family: var(--font-cute);
  font-size: 18px;
  color: var(--dusty-pink);
  margin-bottom: 6px;
}

.tl-entry__card {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  text-align: left;
}

.tl-entry__img {
  display: block;
  position: relative;
  width: min(360px, 100%);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-soft);
  transition:
    transform  var(--dur-medium) var(--ease-premium),
    box-shadow var(--dur-medium) var(--ease-soft);
}
.tl-entry__card:hover .tl-entry__img,
.tl-entry__card:focus-visible .tl-entry__img {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}
.tl-entry__img img { width: 100%; height: 100%; object-fit: cover; }

.tl-entry__cap {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 16.5px;
  line-height: 1.5;
  color: var(--burgundy);
  max-width: 36ch;
  margin-top: 10px;
}


/* ==========================================================================
   FLOWERS (§4.9)
   Bloom is gated behind .is-blooming, added by flowers.js when the overlay
   opens and removed on close — so it re-runs on every visit.
   ========================================================================== */
.bouquet {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: clamp(2px, 1.6vw, 14px);
  max-width: 620px;
  margin: 0 auto var(--sp-4);
  min-height: 300px;
}

.flower {
  position: relative;
  width: clamp(74px, 19vw, 108px);
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  transform-origin: 50% 100%;

  /* resting state = the bloom's start frame, so nothing "finishes early" */
  opacity: 0;
  scale: .3;
}
.flower svg { width: 100%; height: auto; overflow: visible; }

.bouquet.is-blooming .flower {
  animation:
    bloom 900ms var(--ease-bounce) forwards,
    sway 5s var(--ease-soft) infinite;
  animation-delay: calc(var(--i) * 130ms), calc(900ms + var(--i) * 130ms);
}
@keyframes bloom {
  0%   { opacity: 0; scale: .3;  rotate: -12deg; }
  70%  { opacity: 1; scale: 1.1; rotate: 4deg; }
  100% { opacity: 1; scale: 1;   rotate: 0deg; }
}
@keyframes sway {
  0%, 100% { transform: rotate(-2.5deg); }
  50%      { transform: rotate(2.5deg); }
}

.flower:hover  { filter: brightness(1.05); }
.flower:active { scale: .95; }

/* petals that drop from a tapped flower */
.petal {
  position: fixed;
  z-index: calc(var(--z-overlay) + 1);
  width: 13px;
  height: 13px;
  border-radius: 60% 0 60% 0;
  background: var(--dusty-pink);
  pointer-events: none;
  will-change: transform, opacity;
  animation: petal-fall 2.4s var(--ease-soft) forwards;
}
@keyframes petal-fall {
  0%   { opacity: 1; transform: translate(0, 0) rotate(0); }
  100% { opacity: 0; transform: translate(var(--dx), 46vh) rotate(420deg); }
}

.bloom-msg {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(19px, 5vw, 25px);
  line-height: 1.5;
  color: var(--burgundy);
  max-width: 24ch;
  min-height: 3.2em;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity   var(--dur-medium) var(--ease-premium),
    transform var(--dur-medium) var(--ease-premium);
}
.bloom-msg.is-on { opacity: 1; transform: none; }


/* ==========================================================================
   LIGHTBOX
   ========================================================================== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-light);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--sp);
  padding: var(--sp-2);
  background: rgba(48, 13, 25, .93);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity    var(--dur-medium) var(--ease-soft),
    visibility 0s linear var(--dur-medium);
}
.lightbox.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition:
    opacity    var(--dur-medium) var(--ease-soft),
    visibility 0s linear 0s;
}

.lightbox__figure {
  grid-column: 2;
  margin: 0;
  display: grid;
  justify-items: center;
  gap: var(--sp-2);
  min-width: 0;
}
.lightbox__figure img {
  max-width: 100%;
  max-height: 78vh;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-strong);
  animation: lb-in var(--dur-medium) var(--ease-premium);
}
@keyframes lb-in {
  from { opacity: 0; transform: scale(.94); }
  to   { opacity: 1; transform: none; }
}
.lightbox__figure figcaption {
  font-family: var(--font-cute);
  font-size: 18px;
  color: var(--pastel-pink);
  text-align: center;
}

.lightbox__nav,
.lightbox__close {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  cursor: pointer;
  border: 1.5px solid rgba(251, 215, 227, .35);
  border-radius: var(--r-pill);
  background: rgba(251, 215, 227, .10);
  color: var(--pastel-pink);
  transition: background var(--dur-fast) var(--ease-soft),
              transform  var(--dur-fast) var(--ease-bounce);
}
.lightbox__nav:hover,
.lightbox__close:hover { background: rgba(251, 215, 227, .24); transform: scale(1.08); }
.lightbox__nav--prev { grid-column: 1; }
.lightbox__nav--next { grid-column: 3; }
.lightbox__close {
  position: absolute;
  top: max(16px, env(safe-area-inset-top));
  right: 16px;
  z-index: 2;
}