:root {
  /* Uses shared tokens from index/blog pages when present */
  /* Letter-in-envelope: shared module (love-letter-demo.css + love-letter-demo.js) — tune tokens here sitewide */
  --love-letter-inset-y: 5%;
  --love-letter-inset-x: 4%;
  /* Room for salutation header + 16px body (see .signature-black) */
  --love-letter-padding: 32px 22px 18px 22px;
}

/* Love letter demo (envelope preview) — shared by index, blog, landing pages, create + letter when linked */

.envelope-container {
  position: relative;
  width: 420px;
  aspect-ratio: 3/2;
  margin: 0 auto;
}

.envelope {
  position: relative;
  width: 100%;
  height: 100%;
  cursor: pointer;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 10px 30px var(--shadow, rgba(0, 0, 0, 0.15));
  background: linear-gradient(135deg, var(--light-rose, #f8bbd9), var(--rose, #be185d));
  outline: 1px solid rgba(255, 255, 255, 0.35);
}

.envelope-liner {
  position: absolute;
  inset: 0 0 50% 0;
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.25) 0 8px, rgba(255, 255, 255, 0.12) 8px 16px),
    linear-gradient(135deg, #ffd6ea, #e28ab6);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  z-index: 1;
}

.envelope-flap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding-top: 50%;
  background: var(--rose, #be185d);
  clip-path: polygon(0 0, 50% 100%, 100% 0);
  transform-origin: top center;
  transition: transform 1.4s ease-in-out;
  z-index: 3;
  box-shadow: 0 2px 0 rgba(255, 255, 255, 0.35) inset;
}

.envelope-bottom-flap {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 46%;
  background: linear-gradient(135deg, #c53a79, #92134b);
  clip-path: polygon(0 100%, 50% 0, 100% 100%);
  z-index: 1;
  box-shadow: 0 -2px 0 rgba(0, 0, 0, 0.12) inset;
}

.sparkle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: #f59e0b;
  border-radius: 50%;
  animation: sparkle 2s infinite;
}

@keyframes sparkle {
  0%, 100% { opacity: 0; transform: scale(0); }
  50% { opacity: 1; transform: scale(1); }
}

.envelope.opening .envelope-flap {
  transform: rotateX(180deg);
}

.letter-content {
  position: absolute;
  /* Larger paper in the envelope — tight, even inset (see :root variables) */
  top: var(--love-letter-inset-y);
  right: var(--love-letter-inset-x);
  bottom: var(--love-letter-inset-y);
  left: var(--love-letter-inset-x);
  padding: var(--love-letter-padding);
  box-sizing: border-box;
  border-radius: 10px;
  /* One scroll for the whole letter (no nested scroll on the body) */
  overflow: auto;
  z-index: 5;
  color: var(--ink, #3d2b2b);
  font-family: Georgia, serif;
  scroll-behavior: smooth;
  background:
    repeating-linear-gradient(90deg, rgba(0, 0, 0, 0.02) 0 2px, transparent 2px 4px),
    repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.01) 0 2px, transparent 2px 4px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.96)),
    repeating-linear-gradient(180deg, rgba(190, 24, 93, 0.08) 0 1px, transparent 1px 28px),
    radial-gradient(1200px 600px at 30% 20%, rgba(0, 0, 0, 0.03) 0 45%, transparent 46%),
    radial-gradient(900px 450px at 75% 80%, rgba(0, 0, 0, 0.025) 0 45%, transparent 46%);
  background-attachment: fixed, fixed, local, local, local, local;
  background-blend-mode: multiply, multiply, normal, normal, normal, normal;
  background-repeat: repeat, repeat, no-repeat, repeat, no-repeat, no-repeat;
  box-shadow:
    inset 0 0 0 1px #f3c3d8,
    inset 0 20px 40px rgba(190, 24, 93, 0.06),
    0 10px 30px rgba(0, 0, 0, 0.18);
  transform: scale(0.9) translateY(50px);
  opacity: 0;
  transition: transform 1.2s ease-out, opacity 1.2s ease-out;
}

.letter-content::after {
  content: "♥";
  position: absolute;
  left: 50%;
  top: 52%;
  transform: translate(-50%, -50%) rotate(-10deg);
  font-size: 180px;
  color: var(--rose, #be185d);
  opacity: 0.04;
  pointer-events: none;
}

.envelope.opening .letter-content {
  transform: scale(1) translateY(0);
  opacity: 1;
  z-index: 4;
}

.letter-content .header {
  text-align: center;
  border-bottom: 2px solid var(--light-rose, #f8bbd9);
  padding-top: 6px;
  padding-bottom: 16px;
  margin-bottom: 18px;
}

.letter-content .title {
  color: var(--rose, #be185d);
  font-size: 24px;
  margin-bottom: 4px;
}

/* Salutation: pink italic “For …” / “Für …” (demo: .header .signature; create/letter: .signature-from) */
.letter-content .header .signature::before,
.letter-content .header .signature-from::before {
  content: "♥";
  display: block;
  text-align: center;
  font-style: normal;
  /* ~body (16px) floor, scales with “For” line via em, never above salutation (cap 24px < 26px max) */
  font-size: clamp(16px, 0.88em, 24px);
  line-height: 1;
  margin-bottom: 10px;
  color: var(--rose, #be185d);
  opacity: 0.92;
}

.letter-content .header .signature,
.letter-content .header .signature-from {
  text-align: center;
  margin-top: 0;
  font-style: italic;
  font-weight: 400;
  font-size: clamp(20px, 0.5vw + 18px, 26px);
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--rose, #be185d);
}

.letter-content .signature-black {
  text-align: center;
  margin-top: 0;
  font-style: italic;
  font-size: 16px;
  line-height: 1.62;
  color: var(--ink, #3d2b2b);
  word-break: break-word;
}

/* Closing line follows the message in normal flow (not pinned to the bottom) */
.letter-content > .signature {
  text-align: right;
  margin-top: 16px;
  font-style: italic;
  font-size: 16px;
  color: var(--rose, #be185d);
}

@media (max-width: 600px) {
  .envelope-container {
    width: 340px;
  }
  .letter-content {
    top: 6%;
    right: 3.5%;
    bottom: 6%;
    left: 3.5%;
    padding: 20px 14px 12px 14px;
  }
  .letter-content .signature-black {
    font-size: 15px;
    line-height: 1.58;
  }
}

/* Fullscreen: icon on the letter paper only, after envelope opens */
.letter-content .love-letter-fullscreen-wrap {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 10;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 0.25s ease,
    visibility 0.25s ease;
}
/* After open (matches ~1.2s letter reveal — delay so button appears on the paper) */
.envelope.opening .letter-content .love-letter-fullscreen-wrap {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition-delay: 1.15s;
}
.envelope:not(.opening) .letter-content .love-letter-fullscreen-wrap {
  transition-delay: 0s;
}

.love-letter-fullscreen-btn {
  margin: 0;
  padding: 6px;
  width: auto;
  height: auto;
  min-width: 32px;
  min-height: 32px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(75, 85, 99, 0.92);
  background: transparent;
  border: none;
  cursor: pointer;
  box-shadow: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}
.love-letter-fullscreen-btn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: #1f2937;
}
.love-letter-fullscreen-btn:focus,
.love-letter-fullscreen-btn:focus-visible {
  outline: none;
}

.love-letter-fullscreen-btn-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Do not set display on both SVGs — [hidden] loses to a class, so enter/exit are toggled explicitly */
.love-letter-fs-enter {
  display: block;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}
.love-letter-fs-exit {
  display: none;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}
.envelope-container:is(:fullscreen, :-webkit-full-screen) .love-letter-fs-enter {
  display: none;
}
.envelope-container:is(:fullscreen, :-webkit-full-screen) .love-letter-fs-exit {
  display: block;
}

.envelope-container:is(:fullscreen, :-webkit-full-screen) {
  width: 100vw;
  height: 100vh;
  max-width: none;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #fdf2f8, #fce7f3, #fbcfe8);
  aspect-ratio: unset;
}

/* Beat create.css `.letter-preview .envelope-container { aspect-ratio: 3/2 }` while fullscreen */
.letter-preview .envelope-container:is(:fullscreen, :-webkit-full-screen) {
  aspect-ratio: unset;
}

/* Fullscreen: envelope stays postcard-sized; letter is a large sheet centered in front */
@keyframes love-letter-fs-sheet-in {
  from {
    opacity: 0.88;
    transform: translate(-50%, -50%) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.envelope-container:is(:fullscreen, :-webkit-full-screen) .envelope {
  width: min(92vw, 720px);
  max-width: 100%;
  flex-shrink: 0;
  height: auto;
  aspect-ratio: 3 / 2;
  overflow: visible;
}

.envelope-container:is(:fullscreen, :-webkit-full-screen) .envelope.opening .letter-content {
  position: fixed;
  top: 50%;
  left: 50%;
  right: auto;
  bottom: auto;
  width: min(96vw, 920px);
  height: min(92vh, 1200px);
  max-height: 92vh;
  margin: 0;
  box-sizing: border-box;
  transform: translate(-50%, -50%);
  z-index: 50;
  padding: clamp(36px, 5.5vh, 56px) clamp(20px, 3vw, 40px) clamp(18px, 2.5vh, 32px);
  /* Ease into layout: short sheet animation (opacity + scale); pad/shadow ease separately from opening-letter transform */
  transition:
    padding 0.48s cubic-bezier(0.22, 1, 0.32, 1),
    box-shadow 0.45s ease-out;
  animation: love-letter-fs-sheet-in 0.48s cubic-bezier(0.22, 1, 0.32, 1) both;
}

@media (prefers-reduced-motion: reduce) {
  .envelope-container:is(:fullscreen, :-webkit-full-screen) .envelope.opening .letter-content {
    animation: none;
    opacity: 1;
    transform: translate(-50%, -50%);
    transition: none;
  }
}

.envelope-container:is(:fullscreen, :-webkit-full-screen) .letter-content .header {
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.envelope-container:is(:fullscreen, :-webkit-full-screen) .letter-content .header .signature-from,
.envelope-container:is(:fullscreen, :-webkit-full-screen) .letter-content .header .signature {
  font-size: clamp(22px, 1.5vw + 16px, 30px);
}

/* After exiting fullscreen: snap back without tween or lingering sheet animation */
.letter-content.love-letter-fs-skip-transition {
  transition: none !important;
  animation: none !important;
}

.envelope-container:is(:fullscreen, :-webkit-full-screen) .letter-content .signature-black {
  font-size: 16px;
  line-height: 1.62;
}

.envelope-container:is(:fullscreen, :-webkit-full-screen) .letter-content .title {
  font-size: clamp(22px, 2vw + 14px, 30px);
}

/* In fullscreen, keep control visible and tappable (viewport-fixed) */
.envelope-container:is(:fullscreen, :-webkit-full-screen) .letter-content .love-letter-fullscreen-wrap {
  position: fixed;
  top: 16px;
  right: 16px;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition-delay: 0s;
  z-index: 2147483647;
}