:root {
  --envelope-paper: #e7ebdf;
  --envelope-flap: #f0f2e9;
  --envelope-fold: #c3cdb9;
  --envelope-lining: #a9b99f;
  --envelope-seal: #344d3e;
  --envelope-shadow: #263e3224;
}

.envelope-screen {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 46px 24px 32px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 52%, var(--surface), transparent 72%);
}

.envelope-heading { margin-bottom: 38px; }
.envelope-heading .eyebrow { color: var(--gold); margin-bottom: 10px; font-size: .75rem; }
.envelope-heading h1 {
  display: block;
  margin: 0;
  font: normal clamp(2.3rem, 5vw, 3.3rem)/1.2 var(--serif);
  letter-spacing: -.035em;
}
.envelope-date { margin: 9px 0 0; font-size: .875rem; color: var(--muted); }

.envelope-button {
  display: block;
  width: min(560px, 100%);
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  text-align: center;
}
.envelope-button:disabled { opacity: 1; }
.envelope-button:focus-visible { outline-offset: 12px; }
.envelope-scene { display: block; perspective: 1200px; }
.envelope-shell {
  display: block;
  position: relative;
  aspect-ratio: 3 / 2;
  border-radius: 5px;
  background: var(--envelope-paper);
  box-shadow: 0 25px 55px -17px var(--envelope-shadow), 0 3px 8px #00000008;
  transition: transform .3s ease, box-shadow .3s ease;
}
.envelope-lining {
  position: absolute;
  inset: 3px;
  border-radius: 4px;
  background: repeating-linear-gradient(45deg, #ffffff14 0 1px, transparent 1px 9px), var(--envelope-lining);
}
.envelope-letter {
  position: absolute;
  inset: 5% 8% 6%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 13px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 4px 12px #0000000d;
}
.letter-eyebrow { font: .65rem/1.5 var(--sans); text-transform: uppercase; letter-spacing: .13em; color: var(--muted); }
.letter-names { font: normal clamp(1.5rem, 4vw, 2.4rem)/1.15 var(--serif); letter-spacing: -.035em; }
.letter-rule { width: 34px; height: 1px; background: var(--gold); }
.letter-date { font: .8125rem/1.4 var(--sans); }
.letter-message { font: italic .9375rem/1.5 var(--serif); color: var(--muted); }

.envelope-pocket, .envelope-flap { position: absolute; left: 0; top: 0; width: 100%; }
.envelope-pocket { height: 100%; z-index: 3; border: 1px solid var(--envelope-fold); border-top: 0; border-radius: 5px; }
.pocket-paper { fill: var(--envelope-paper); }
.pocket-fold, .flap-fold { fill: none; stroke: var(--envelope-fold); stroke-width: 1.25; }
.envelope-flap {
  height: 45%;
  z-index: 5;
  overflow: visible;
  transform-origin: 50% 0;
}
.flap-paper { fill: var(--envelope-flap); }
.lotus-envelope-art { display: none; }
.envelope-address {
  position: absolute;
  z-index: 4;
  top: 50%;
  bottom: 6%;
  left: 8%;
  right: 8%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 9px;
}
.envelope-to { font: .65rem/1.3 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
.envelope-name { max-width: 100%; font: normal clamp(1.25rem, 3.5vw, 2.2rem)/1.16 var(--serif); overflow-wrap: anywhere; }
.envelope-name.long-name { font-size: clamp(.9375rem, 2.5vw, 1.65rem); }
.envelope-name.very-long-name { font-size: clamp(.8125rem, 1.8vw, 1.25rem); }
.envelope-sprig { position: absolute; z-index: 4; left: 3%; bottom: 4%; width: 16%; height: 37%; color: var(--accent); opacity: .19; }
.envelope-seal {
  position: absolute;
  z-index: 6;
  top: 44%;
  left: 50%;
  display: grid;
  place-items: center;
  width: clamp(48px, 8vw, 64px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%) rotate(-8deg);
  border: 4px solid #ffffff13;
  border-radius: 47% 53% 49% 51% / 52% 46% 54% 48%;
  background: radial-gradient(circle at 30% 25%, #ffffff18, transparent 65%), var(--envelope-seal);
  box-shadow: 1px 4px 6px #00000023, inset 0 0 0 1px #ffffff2b, inset 0 0 0 4px #0000000b;
  color: #fff9e9;
  font: italic 1rem/1 var(--serif);
}
.envelope-seal span { transform: rotate(8deg); white-space: nowrap; font-size: clamp(.8125rem, 1.6vw, 1rem); }
.envelope-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 48px;
  margin-top: 35px;
  padding: 12px 21px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  font: .875rem/1.5 var(--sans);
  transition: background .2s ease;
}
.envelope-hint svg { width: 18px; height: 18px; transition: transform .2s ease; }
.envelope-status { min-height: 22px; max-width: 400px; margin: 15px 0 0; font: .8125rem/1.5 var(--sans); color: var(--muted); }

@media (hover: hover) {
  .envelope-button:not(:disabled):hover .envelope-shell { transform: translateY(-4px); box-shadow: 0 30px 65px -17px var(--envelope-shadow), 0 4px 10px #0000000a; }
  .envelope-button:not(:disabled):hover .envelope-hint { filter: brightness(1.12); }
  .envelope-button:not(:disabled):hover .envelope-hint svg { transform: translateX(3px); }
}

/* Unseal, lift the flap, draw out the card, then reveal the full invitation. */
.is-opening .envelope-heading, .is-opening .envelope-hint, .is-opening .envelope-status {
  opacity: 0;
  transition: opacity .22s ease;
}
.is-opening .envelope-seal { animation: unseal .25s ease forwards; }
.is-opening .envelope-flap {
  transform: rotateX(180deg);
  z-index: 1;
  transition: transform .65s ease-in-out .12s, z-index 0s .44s;
}
.is-opening .envelope-letter {
  transform: translateY(-58%);
  transition: transform .65s cubic-bezier(.22, .7, .3, 1) .55s;
}
.is-opening .envelope-shell {
  transform: translateY(18px);
  opacity: 0;
  transition: transform .3s ease 1.15s, opacity .3s ease 1.15s;
}
@keyframes unseal {
  to { opacity: 0; transform: translate(-50%, -50%) scale(.75) rotate(-18deg); }
}
.invitation-revealed { animation: invitation-reveal .65s ease; }
@keyframes invitation-reveal {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
#couple-title:focus { outline: none; }

@media (max-width: 650px) {
  .envelope-screen { padding: 32px 20px 24px; }
  .envelope-heading { margin-bottom: 32px; }
  .envelope-heading .eyebrow { font-size: .6875rem; }
  .envelope-address { left: 6%; right: 6%; gap: 6px; }
  .envelope-hint { margin-top: 30px; padding-inline: 18px; gap: 10px; font-size: .8125rem; }
  .envelope-letter { gap: 10px; padding: 12px; }
  .letter-eyebrow { font-size: .55rem; }
  .letter-date { font-size: .75rem; }
  .letter-message { font-size: .75rem; }
}

@media (prefers-reduced-motion: reduce) {
  .envelope-screen *, .invitation-revealed { animation: none !important; transition: none !important; }
}