:root {
  --cream: #f7ecd1;
  --cream-deep: #e8d3a5;
  --warm: #d9b877;
  --paper: #fbf5e4;
  --paper-deep: #f0e3c2;
  --ink: #2e1f13;
  --ink-soft: #5a4632;
  --burgundy: #8b2e3d;
  --burgundy-deep: #6b1f2c;
  --burgundy-bright: #b03c4f;
  --gold: #b8892b;
  --gold-soft: #d4a84b;
  --gold-bright: #e8c56a;
  --envelope: #c8a373;
  --envelope-deep: #a8864f;
  --envelope-dark: #7a5d32;
  --envelope-inside: #8f6d3a;
  --shadow: rgba(58, 42, 26, 0.25);
  --shadow-deep: rgba(58, 42, 26, 0.45);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  font-family: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  color: var(--ink);
  min-height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
  position: relative;
  background:
    radial-gradient(ellipse at 15% 10%, rgba(232, 197, 106, 0.35), transparent 50%),
    radial-gradient(ellipse at 85% 15%, rgba(176, 60, 79, 0.18), transparent 55%),
    radial-gradient(ellipse at 50% 100%, rgba(107, 31, 44, 0.22), transparent 60%),
    linear-gradient(170deg, #f9e9c3 0%, #e8c890 35%, #d9a96a 75%, #b87848 100%);
}

/* Paper noise texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.2  0 0 0 0 0.15  0 0 0 0 0.1  0 0 0 0.12 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: 0.55;
  pointer-events: none;
  mix-blend-mode: multiply;
  z-index: 1;
}

/* Vignette */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(58, 20, 10, 0.35) 100%);
  pointer-events: none;
  z-index: 2;
}

/* Background layers */
.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.bg-far {
  z-index: 0;
}

.bg-far .bg-item {
  filter: blur(6px);
  opacity: 0.35;
}

.bg-mid {
  z-index: 3;
}

.bg-mid .bg-item {
  opacity: 0.7;
  filter: drop-shadow(0 6px 10px var(--shadow));
  animation: drift 9s ease-in-out infinite;
  animation-delay: var(--d);
}

.bg-item {
  position: absolute;
  left: var(--x);
  top: var(--y);
  font-size: var(--s);
  transform: rotate(var(--r));
  user-select: none;
  line-height: 1;
}

@keyframes drift {
  0%, 100% { transform: rotate(var(--r)) translateY(0); }
  50% { transform: rotate(calc(var(--r) + 3deg)) translateY(-14px); }
}

/* Sparkles */
.sparkles {
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.sparkle {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: 6px;
  height: 6px;
  background: var(--gold-bright);
  border-radius: 50%;
  box-shadow: 0 0 10px 2px rgba(232, 197, 106, 0.8);
  animation: twinkle 4s ease-in-out infinite;
  animation-delay: var(--d);
  opacity: 0;
}

.sparkle::before,
.sparkle::after {
  content: "";
  position: absolute;
  background: linear-gradient(var(--gold-bright), transparent);
  left: 50%;
}

.sparkle::before {
  width: 1px;
  height: 18px;
  top: -9px;
  transform: translateX(-50%);
}

.sparkle::after {
  width: 18px;
  height: 1px;
  top: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(90deg, transparent, var(--gold-bright), transparent);
}

@keyframes twinkle {
  0%, 100% { opacity: 0; transform: scale(0.5); }
  50% { opacity: 1; transform: scale(1); }
}

/* Bookshelf silhouette at bottom */
.shelf {
  position: fixed;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 4px;
  align-items: flex-end;
  z-index: 3;
  opacity: 0.55;
  filter: drop-shadow(0 -4px 8px rgba(0, 0, 0, 0.25));
  pointer-events: none;
}

.book {
  width: 28px;
  border-radius: 2px 2px 0 0;
  position: relative;
}

.book::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(255, 255, 255, 0.15);
}

.book::after {
  content: "";
  position: absolute;
  bottom: 8px;
  left: 4px;
  right: 4px;
  height: 2px;
  background: rgba(255, 255, 255, 0.2);
}

.b1 { height: 120px; background: linear-gradient(180deg, #6b1f2c, #4a0f1a); }
.b2 { height: 100px; background: linear-gradient(180deg, #2e4a3a, #1a2e22); width: 32px; }
.b3 { height: 140px; background: linear-gradient(180deg, #8b5a2b, #5a3a1a); }
.b4 { height: 90px; background: linear-gradient(180deg, #b8892b, #7a5d1a); width: 26px; }
.b5 { height: 130px; background: linear-gradient(180deg, #3a3a5a, #1a1a3a); }
.b6 { height: 110px; background: linear-gradient(180deg, #8b2e3d, #5a1a24); width: 30px; }
.b7 { height: 150px; background: linear-gradient(180deg, #4a3a2a, #2a1a0a); }
.b8 { height: 100px; background: linear-gradient(180deg, #2a4a5a, #1a2a3a); width: 28px; }

/* Stage */
.stage {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.intro {
  position: absolute;
  top: clamp(2rem, 6vh, 4.5rem);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  transition: opacity 0.5s ease, transform 0.5s ease;
  z-index: 11;
}

.intro-sub {
  font-size: 1.05rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--burgundy-deep);
  font-weight: 500;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.3);
}

.intro-title {
  font-size: clamp(2.6rem, 5.5vw, 4rem);
  font-weight: 600;
  font-style: italic;
  color: var(--ink);
  margin: 0.4rem 0 0.6rem;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 4px rgba(255, 255, 255, 0.3), 0 3px 10px rgba(0, 0, 0, 0.15);
}

.intro-hint {
  font-size: 1.15rem;
  color: var(--burgundy);
  font-style: italic;
  animation: pulse 2.4s ease-in-out infinite;
  letter-spacing: 0.05em;
}

@keyframes pulse {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.04); }
}

/* Envelope */
.envelope-wrap {
  perspective: 1600px;
  position: relative;
  transition: transform 1s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.8s ease;
}

.envelope-shadow {
  position: absolute;
  left: 50%;
  bottom: -30px;
  transform: translateX(-50%);
  width: 70%;
  height: 28px;
  background: radial-gradient(ellipse, rgba(0, 0, 0, 0.4), transparent 70%);
  filter: blur(4px);
  z-index: -1;
  animation: shadowPulse 4s ease-in-out infinite;
}

@keyframes shadowPulse {
  0%, 100% { transform: translateX(-50%) scale(1); opacity: 0.6; }
  50% { transform: translateX(-50%) scale(0.92); opacity: 0.4; }
}

.envelope {
  position: relative;
  width: clamp(290px, 50vw, 460px);
  height: clamp(190px, 32vw, 300px);
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.3, 0.1, 0.3, 1);
  animation: envelopeIdle 5s ease-in-out infinite;
}

@keyframes envelopeIdle {
  0%, 100% { transform: translateY(0) rotate(0); }
  50% { transform: translateY(-8px) rotate(0.5deg); }
}

.envelope:hover {
  transform: translateY(-10px) scale(1.03) rotateX(-4deg);
}

.envelope:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 14px;
  border-radius: 6px;
}

.pocket,
.flap-back,
.front,
.flap,
.letter-inside {
  position: absolute;
  inset: 0;
}

/* Back pocket (inside of envelope visible when flap open) */
.pocket {
  background:
    linear-gradient(180deg, var(--envelope-inside) 0%, var(--envelope-dark) 100%);
  border-radius: 4px;
  z-index: 1;
  box-shadow:
    inset 0 30px 50px rgba(0, 0, 0, 0.35),
    0 25px 50px var(--shadow-deep);
}

/* Flap-back: the flap seen from inside once opened */
.flap-back {
  background: linear-gradient(160deg, var(--envelope-inside) 0%, var(--envelope-dark) 100%);
  clip-path: polygon(0 0, 100% 0, 50% 62%);
  transform-origin: top center;
  transform: rotateX(0deg);
  z-index: 2;
  opacity: 0;
  box-shadow: inset 0 -30px 40px rgba(0, 0, 0, 0.3);
}

/* Letter hidden inside pocket, rises out */
.letter-inside {
  background:
    repeating-linear-gradient(
      0deg,
      transparent 0,
      transparent 22px,
      rgba(139, 46, 61, 0.08) 22px,
      rgba(139, 46, 61, 0.08) 23px
    ),
    linear-gradient(180deg, var(--paper), var(--paper-deep));
  border-radius: 3px;
  z-index: 3;
  transform: translateY(6%) scale(0.96);
  opacity: 0;
  box-shadow:
    0 6px 16px rgba(0, 0, 0, 0.3),
    inset 0 0 30px rgba(139, 89, 43, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 1s cubic-bezier(0.2, 0.7, 0.2, 1) 0.4s, opacity 0.5s ease 0.5s;
}

.letter-preview {
  font-size: 3rem;
  color: var(--burgundy);
  opacity: 0.7;
  letter-spacing: 0.4em;
  transform: translateX(0.2em);
}

/* Front face */
.front {
  background:
    linear-gradient(145deg, #d4b27f 0%, var(--envelope) 45%, var(--envelope-deep) 100%);
  border-radius: 4px;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    inset 0 0 80px rgba(0, 0, 0, 0.12),
    inset 0 2px 1px rgba(255, 255, 255, 0.3),
    0 25px 40px var(--shadow);
  overflow: hidden;
  transform-origin: bottom center;
  transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1) 0.5s, opacity 0.6s ease 0.6s;
}

/* Envelope seams */
.front::before,
.front::after {
  content: "";
  position: absolute;
  background: rgba(0, 0, 0, 0.14);
}

.front::before {
  top: 0; left: 0; bottom: 0;
  width: 1px;
  transform: translateX(50%);
  left: 0;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.15), transparent);
}

.front::after {
  bottom: 0;
  left: 0;
  right: 0;
  height: 55%;
  clip-path: polygon(0 100%, 50% 0, 100% 100%);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.03));
  opacity: 0.5;
}

.front-lines {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  pointer-events: none;
}

.front-text {
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  color: var(--ink);
  letter-spacing: 0.04em;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
}

.front-sub {
  font-size: clamp(0.85rem, 1.3vw, 1rem);
  font-style: italic;
  color: var(--ink-soft);
  letter-spacing: 0.25em;
  opacity: 0.8;
}

/* Flap (visible closed, with wax seal) */
.flap {
  background: linear-gradient(145deg, #d4b27f 0%, var(--envelope) 50%, var(--envelope-deep) 100%);
  clip-path: polygon(0 0, 100% 0, 50% 62%);
  transform-origin: top center;
  transform: rotateX(0deg);
  transition: transform 1.1s cubic-bezier(0.7, -0.05, 0.3, 1.05);
  z-index: 5;
  box-shadow: inset 0 -30px 40px rgba(0, 0, 0, 0.18);
}

.flap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.15), transparent 40%);
  clip-path: inherit;
}

/* Wax seal */
.wax {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: clamp(50px, 9vw, 72px);
  height: clamp(50px, 9vw, 72px);
  z-index: 10;
  transition: transform 0.3s ease;
}

.wax-half {
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  background:
    radial-gradient(circle at 40% 30%, var(--burgundy-bright), var(--burgundy) 50%, var(--burgundy-deep) 100%);
  box-shadow:
    inset 0 0 12px rgba(0, 0, 0, 0.5),
    0 3px 6px rgba(0, 0, 0, 0.4);
  transition: transform 0.9s cubic-bezier(0.4, 0.1, 0.2, 1.2), opacity 0.8s ease;
}

.wax-half.left {
  left: 0;
  border-radius: 50% 0 0 50%;
  clip-path: polygon(0 0, 100% 0, 96% 25%, 90% 50%, 96% 75%, 100% 100%, 0 100%);
}

.wax-half.right {
  right: 0;
  border-radius: 0 50% 50% 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 4% 75%, 10% 50%, 4% 25%);
}

.wax-symbol {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--gold-bright);
  font-size: clamp(1.4rem, 2.8vw, 2.2rem);
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  opacity: 1;
  transition: opacity 0.3s ease;
  z-index: 2;
}

/* === OPENED STATE === */
.envelope-wrap.opened .envelope {
  animation: none;
}

.envelope-wrap.opened .wax-half.left {
  transform: translate(-80px, 50px) rotate(-55deg);
  opacity: 0;
}

.envelope-wrap.opened .wax-half.right {
  transform: translate(80px, 50px) rotate(55deg);
  opacity: 0;
}

.envelope-wrap.opened .wax-symbol {
  opacity: 0;
}

.envelope-wrap.opened .flap {
  transform: rotateX(-175deg);
  transition-delay: 0.3s;
}

.envelope-wrap.opened .flap-back {
  opacity: 1;
  transform: rotateX(-175deg);
  transition: opacity 0s 1.2s, transform 1.1s cubic-bezier(0.7, -0.05, 0.3, 1.05) 0.3s;
}

.envelope-wrap.opened .letter-inside {
  transform: translateY(-55%) scale(1.04);
  opacity: 1;
}

.envelope-wrap.opened .front {
  transform: translateY(6px) rotateX(-3deg);
}

/* Fly away */
.envelope-wrap.flying {
  transform: translateY(-55vh) scale(0.3) rotate(-6deg);
  opacity: 0;
  pointer-events: none;
}

/* Cards stack */
.cards-stack {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.92);
  width: min(480px, 90vw);
  opacity: 0;
  pointer-events: none;
  z-index: 12;
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.3, 0, 0.2, 1);
  perspective: 1800px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.2rem;
}

body.revealed .cards-stack {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: auto;
  transition-delay: 0.25s;
}

body.revealed .intro {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

body.revealed .envelope-wrap {
  opacity: 0;
  pointer-events: none;
}

.stack-inner {
  position: relative;
  width: 100%;
  display: grid;
  grid-template-areas: "stack";
}

.stack-hint {
  font-style: italic;
  color: var(--paper);
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  text-align: center;
  padding: 0.45rem 1.1rem;
  background: rgba(107, 31, 44, 0.85);
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  animation: pulse 2.4s ease-in-out infinite;
}

.card {
  grid-area: stack;
  position: relative;
  display: flex;
  flex-direction: column;
  background:
    repeating-linear-gradient(
      0deg,
      transparent 0,
      transparent 32px,
      rgba(139, 46, 61, 0.06) 32px,
      rgba(139, 46, 61, 0.06) 33px
    ),
    linear-gradient(180deg, var(--paper), var(--paper-deep));
  border-radius: 6px;
  box-shadow:
    0 2px 0 rgba(255, 255, 255, 0.6) inset,
    0 25px 50px var(--shadow-deep),
    0 5px 15px rgba(0, 0, 0, 0.12);
  transform-origin: center;
  transition: transform 0.65s cubic-bezier(0.35, 0, 0.25, 1), filter 0.65s ease, box-shadow 0.65s ease;
  max-height: min(72vh, 680px);
  overflow: hidden;
}

.card-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 2.6rem 2rem 2rem;
  scrollbar-width: thin;
  scrollbar-color: var(--burgundy) transparent;
}

.card-scroll::-webkit-scrollbar { width: 6px; }
.card-scroll::-webkit-scrollbar-thumb { background: var(--burgundy); border-radius: 3px; }
.card-scroll::-webkit-scrollbar-track { background: transparent; }

.stanza {
  display: block;
  margin-bottom: 0.9rem;
}

.poem-highlight {
  display: block;
  margin-top: 1.2rem;
  font-weight: 600;
  font-style: italic;
  font-size: 1.15em;
  color: var(--burgundy);
  letter-spacing: 0.03em;
}

.card.is-front {
  transform: translateY(0);
  z-index: 3;
  cursor: pointer;
}

.card.is-front:hover {
  transform: translateY(-6px);
  box-shadow:
    0 2px 0 rgba(255, 255, 255, 0.6) inset,
    0 30px 60px var(--shadow-deep),
    0 8px 20px rgba(0, 0, 0, 0.15);
}

.card.is-back {
  transform: translateY(22px) scale(0.94) rotate(-3deg);
  z-index: 1;
  filter: brightness(0.92) saturate(0.95);
  pointer-events: none;
}

.card.is-flipping {
  animation: flyToBack 0.85s cubic-bezier(0.5, 0, 0.3, 1) forwards;
  pointer-events: none;
}

@keyframes flyToBack {
  0% {
    transform: translate(0, 0) rotate(0deg) scale(1);
    z-index: 4;
    filter: brightness(1);
  }
  45% {
    transform: translate(85%, 30px) rotate(14deg) scale(0.9);
    z-index: 4;
    filter: brightness(0.96);
    box-shadow:
      0 2px 0 rgba(255, 255, 255, 0.5) inset,
      0 35px 60px var(--shadow-deep),
      0 10px 25px rgba(0, 0, 0, 0.2);
  }
  46% { z-index: 0; }
  70% {
    transform: translate(40%, 28px) rotate(-4deg) scale(0.93);
    z-index: 0;
    filter: brightness(0.93);
  }
  100% {
    transform: translateY(22px) scale(0.94) rotate(-3deg);
    z-index: 0;
    filter: brightness(0.92) saturate(0.95);
  }
}


.card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(139, 46, 61, 0.28);
  border-radius: 2px;
  pointer-events: none;
}

.card-corner {
  position: absolute;
  width: 28px;
  height: 28px;
  border: 2px solid var(--gold);
  pointer-events: none;
}

.card-corner.top-left { top: 6px; left: 6px; border-right: none; border-bottom: none; }
.card-corner.top-right { top: 6px; right: 6px; border-left: none; border-bottom: none; }
.card-corner.bottom-left { bottom: 6px; left: 6px; border-right: none; border-top: none; }
.card-corner.bottom-right { bottom: 6px; right: 6px; border-left: none; border-top: none; }

.card-title {
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  font-weight: 600;
  font-style: italic;
  color: var(--burgundy);
  text-align: center;
  letter-spacing: 0.03em;
}

.card-divider {
  text-align: center;
  color: var(--gold);
  font-size: 1.2rem;
  margin: 0.4rem 0 1rem;
  letter-spacing: 0.6em;
}

.card-divider::before,
.card-divider::after {
  content: "—";
  color: var(--gold-soft);
  margin: 0 0.5rem;
  letter-spacing: normal;
}

.card-body {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.75;
  color: var(--ink-soft);
  text-align: center;
  font-weight: 400;
}

.card-body.poem {
  font-style: italic;
  line-height: 1.95;
}

.card-sign {
  margin-top: 1.5rem;
  text-align: right;
  font-style: italic;
  color: var(--burgundy);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}

.reset {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(251, 245, 228, 0.5);
  backdrop-filter: blur(4px);
  border: 1px solid var(--burgundy);
  color: var(--burgundy);
  padding: 0.6rem 1.8rem;
  font-family: inherit;
  font-size: 1rem;
  font-style: italic;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  z-index: 15;
  transition: opacity 0.5s ease 0.6s, background 0.2s ease, color 0.2s ease;
}

.reset:hover {
  background: var(--burgundy);
  color: var(--cream);
}

body.revealed .reset {
  opacity: 1;
  pointer-events: auto;
}

.credit {
  position: fixed;
  bottom: 14px;
  right: 16px;
  z-index: 20;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--ink-soft);
  letter-spacing: 0.12em;
  opacity: 0.75;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  background: rgba(251, 245, 228, 0.4);
  backdrop-filter: blur(4px);
  border-radius: 20px;
  border: 1px solid rgba(139, 46, 61, 0.2);
  transition: opacity 0.3s ease;
}

.credit:hover {
  opacity: 1;
}

.credit a {
  color: var(--burgundy);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.credit a:hover {
  border-bottom-color: var(--burgundy);
}

.credit-dot {
  color: var(--gold);
  font-size: 0.8rem;
}

@media (max-width: 640px) {
  .bg-item { font-size: calc(var(--s) * 0.7) !important; }
  .bg-far .bg-item { opacity: 0.2; }
  .stage { padding: 2rem 1rem 8rem; }
  .shelf { transform: translateX(-50%) scale(0.6); transform-origin: bottom center; opacity: 0.35; }

  .cards-stack {
    top: 46%;
    gap: 1.3rem;
  }

  .card {
    max-height: 54vh;
  }

  .card-scroll {
    padding: 2rem 1.4rem 1.5rem;
  }

  .card-title { font-size: 1.5rem; }
  .card-body { font-size: 1rem; line-height: 1.65; }
  .card-body.poem { line-height: 1.85; }

  .stack-hint {
    font-size: 0.88rem;
    padding: 0.35rem 0.9rem;
    letter-spacing: 0.05em;
  }

  .reset {
    bottom: 4.5rem;
    padding: 0.5rem 1.4rem;
    font-size: 0.88rem;
    letter-spacing: 0.15em;
  }

  .credit {
    font-size: 0.72rem;
    padding: 0.3rem 0.7rem;
    bottom: 10px;
    right: 10px;
    letter-spacing: 0.08em;
    gap: 0.35rem;
  }

  .credit-dot { font-size: 0.65rem; }

  .intro-title { font-size: 2.2rem; }
  .intro-sub { font-size: 0.85rem; letter-spacing: 0.3em; }
}

@media (max-width: 640px) and (max-height: 720px) {
  .card { max-height: 48vh; }
  .reset { bottom: 3.8rem; }
  .intro { top: 1.2rem; }
  .intro-title { font-size: 1.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-mid .bg-item,
  .envelope,
  .intro-hint,
  .sparkle,
  .envelope-shadow {
    animation: none;
  }
  .card { animation-duration: 0.3s; }
}