/* ==========================================================================
   🎂 Happy Birthday, Ishita! — Stylesheet
   Author: Sudipta
   --------------------------------------------------------------------------
   Sections:
   1. Reset & base
   2. Variables & theme
   3. Animations (keyframes)
   4. Animated background (blobs, stars, balloons, hearts)
   5. Scroll progress bar
   6. Music player
   7. Layout helpers (layer, chapter, section-title, button)
   8. Layer 1: Intro / envelope
   9. Layer 2: Memory gallery
   10. Layer 3: Cake & candles
   11. Layer 4: Letter
   12. Layer 5: Final wish
   13. Confetti (burst + continuous)
   14. Footer
   15. Responsive tweaks (mobile)
   ========================================================================== */

/* 1. Reset & base ---------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Poppins", system-ui, -apple-system, sans-serif;
  color: var(--fg);
  background: var(--bg);
  overflow-x: hidden;
  min-height: 100vh;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

code {
  background: rgba(124, 58, 237, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* 2. Variables & theme ----------------------------------------------------- */
:root {
  --pink: #ec4899;
  --pink-dark: #be185d;
  --violet: #a855f7;
  --violet-dark: #7e22ce;
  --amber: #f59e0b;
  --rose: #f43f5e;
  --cream: #fff5f7;
  --bg: #fff5fa;
  --fg: #2d1b3d;
  --card: #ffffff;
  --shadow-soft: 0 12px 32px rgba(124, 58, 237, 0.15);
  --shadow-strong: 0 20px 60px rgba(124, 58, 237, 0.25);
  --radius: 16px;
  --font-script: "Great Vibes", cursive;
  --font-hand: "Dancing Script", cursive;
  --font-body: "Poppins", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a0f2e;
    --fg: #f3e8ff;
    --card: #2a1a40;
    --cream: #2a1a40;
    --shadow-soft: 0 12px 32px rgba(0, 0, 0, 0.4);
    --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.5);
  }
}

/* 3. Keyframe animations --------------------------------------------------- */
@keyframes drift {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(20px, -15px); }
  50% { transform: translate(-15px, 10px); }
  75% { transform: translate(10px, 20px); }
}

@keyframes twinkle {
  0%, 100% { opacity: 0.2; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

@keyframes balloon-rise {
  0%   { transform: translateY(110vh) translateX(0) rotate(-3deg); }
  50%  { transform: translateY(40vh)  translateX(20px) rotate(3deg); }
  100% { transform: translateY(-20vh) translateX(-20px) rotate(-3deg); }
}

@keyframes heart-float {
  0%   { transform: translateY(0) scale(0.6) rotate(0deg); opacity: 0; }
  10%  { opacity: 1; }
  100% { transform: translateY(-110vh) scale(1.2) rotate(45deg); opacity: 0; }
}

@keyframes flicker {
  0%, 100% { transform: scaleY(1) scaleX(1) rotate(-1deg); opacity: 1; }
  25%      { transform: scaleY(1.05) scaleX(0.95) rotate(1deg); opacity: 0.95; }
  50%      { transform: scaleY(0.95) scaleX(1.05) rotate(-1deg); opacity: 1; }
  75%      { transform: scaleY(1.02) scaleX(0.98) rotate(1deg); opacity: 0.92; }
}

@keyframes glow-pulse {
  0%, 100% { filter: drop-shadow(0 0 8px #fbbf24) drop-shadow(0 0 16px #f97316); opacity: 1; }
  50%      { filter: drop-shadow(0 0 14px #fbbf24) drop-shadow(0 0 28px #f97316); opacity: 0.92; }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes bounce-soft {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

@keyframes pulse-ring {
  0%   { transform: scale(0.8); opacity: 0.8; }
  100% { transform: scale(2.4); opacity: 0; }
}

@keyframes confetti-fall {
  0%   { transform: translateY(-10vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

@keyframes type-caret {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Page fade-in: applied to <body> on wish.html for a smooth transition
   from the intro page. See script.js boot section. */
@keyframes pageFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
body.page-fade-in { animation: pageFadeIn 0.6s ease-out; }

@keyframes eq-bounce {
  0%, 100% { transform: scaleY(0.4); }
  50%      { transform: scaleY(1); }
}

/* 4. Animated background --------------------------------------------------- */
.bg {
  position: fixed;
  inset: 0;
  z-index: -10;
  overflow: hidden;
  background: linear-gradient(135deg, #ffe4ec 0%, #fce7f3 30%, #f3e8ff 70%, #ede9fe 100%);
}

@media (prefers-color-scheme: dark) {
  .bg {
    background: linear-gradient(135deg, #2d1b3d 0%, #1e1b4b 50%, #4a1d3f 100%);
  }
}

.bg__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: drift 10s ease-in-out infinite;
}
.bg__blob--1 { top: -100px; left: -80px; width: 400px; height: 400px; background: radial-gradient(circle, #f9a8d4, transparent 70%); }
.bg__blob--2 { top: 35%; right: -100px; width: 480px; height: 480px; background: radial-gradient(circle, #c4b5fd, transparent 70%); animation-delay: -3s; }
.bg__blob--3 { bottom: -100px; left: 30%; width: 420px; height: 420px; background: radial-gradient(circle, #fde68a, transparent 70%); animation-delay: -6s; }

.bg__stars span,
.bg__balloons span,
.bg__hearts span {
  position: absolute;
  display: block;
}

.bg__stars span {
  width: 3px;
  height: 3px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.8);
  animation: twinkle 2.5s ease-in-out infinite;
}

.bg__balloons span,
.bg__hearts span {
  bottom: 0;
  animation: balloon-rise 16s linear infinite;
}

.bg__hearts span {
  animation-name: heart-float;
  animation-duration: 12s;
}

/* 5. Scroll progress bar --------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 100;
  background: transparent;
}
.scroll-progress__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #ec4899, #a855f7, #f59e0b);
  transform-origin: left;
  transition: width 0.1s ease-out;
}

/* 6. Music player ---------------------------------------------------------- */
.music-player {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  background: rgba(45, 27, 61, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
}
.music-player__btn {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  transition: transform 0.2s, background 0.2s;
}
.music-player__btn:hover { transform: scale(1.1); background: rgba(255, 255, 255, 0.2); }
.music-player__btn:active { transform: scale(0.95); }
.music-player__btn--primary {
  background: linear-gradient(135deg, #ec4899, #a855f7);
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.4);
}
.music-player__bars {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 16px;
  padding: 0 6px;
}
.music-player__bars span {
  width: 3px;
  height: 100%;
  background: #f9a8d4;
  border-radius: 2px;
  transform-origin: bottom;
  animation: eq-bounce 0.6s ease-in-out infinite;
}
.music-player__bars span:nth-child(2) { animation-delay: 0.15s; }
.music-player__bars span:nth-child(3) { animation-delay: 0.3s; }
.music-player__bars span:nth-child(4) { animation-delay: 0.45s; }
.music-player__bars.paused span { animation-play-state: paused; opacity: 0.4; }

@media (max-width: 480px) {
  .music-player__bars { display: none; }
}

/* 7. Layout helpers -------------------------------------------------------- */
.layer {
  position: relative;
  min-height: 100vh;
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.chapter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--pink-dark);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  margin-bottom: 14px;
}
.chapter--amber { color: #b45309; background: rgba(255, 251, 235, 0.8); }
.chapter--rose  { color: #be123c; background: rgba(255, 241, 242, 0.85); }

@media (prefers-color-scheme: dark) {
  .chapter { background: rgba(255, 255, 255, 0.1); color: #f9a8d4; }
  .chapter--amber { color: #fcd34d; background: rgba(255, 255, 255, 0.08); }
  .chapter--rose { color: #fda4af; background: rgba(255, 255, 255, 0.08); }
}

.section-title {
  font-family: var(--font-hand);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--violet-dark);
  line-height: 1.1;
}
@media (prefers-color-scheme: dark) {
  .section-title { color: #ddd6fe; }
}

.section-sub {
  max-width: 600px;
  margin: 12px auto 0;
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: rgba(45, 27, 61, 0.7);
  line-height: 1.6;
}
@media (prefers-color-scheme: dark) {
  .section-sub { color: rgba(243, 232, 255, 0.7); }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}
.btn:hover { transform: translateY(-2px) scale(1.03); }
.btn:active { transform: scale(0.96); }
.btn--amber {
  background: linear-gradient(135deg, #f59e0b, #f97316);
  color: #fff;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}
.btn--ghost {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--violet-dark);
}
@media (prefers-color-scheme: dark) {
  .btn--ghost { background: rgba(255, 255, 255, 0.1); color: #ddd6fe; }
}

/* Reveal-on-scroll: hidden until .is-visible is added by JS */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s, transform 0.7s; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* 8. Layer 1: Intro / envelope -------------------------------------------- */
.envelope {
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: fadeInUp 0.8s ease-out;
}
.envelope__tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--pink-dark);
  margin-bottom: 20px;
}
.envelope__title {
  font-family: var(--font-script);
  font-size: clamp(3.5rem, 12vw, 6rem);
  line-height: 1;
  background: linear-gradient(120deg, #db2777 0%, #9333ea 50%, #f59e0b 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 4s linear infinite;
}
.envelope__name {
  font-family: var(--font-hand);
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  color: var(--violet-dark);
  margin-top: 4px;
}
@media (prefers-color-scheme: dark) {
  .envelope__name { color: #ddd6fe; }
  .envelope__tag { background: rgba(255, 255, 255, 0.1); color: #f9a8d4; }
}
.envelope__hint {
  max-width: 420px;
  margin-top: 16px;
  font-size: 0.95rem;
  color: rgba(45, 27, 61, 0.7);
}
@media (prefers-color-scheme: dark) {
  .envelope__hint { color: rgba(243, 232, 255, 0.7); }
}
.envelope__hint strong { color: var(--pink); }

.open-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 36px;
  padding: 14px 28px;
  border-radius: 999px;
  background: linear-gradient(135deg, #ec4899, #a855f7, #7c3aed);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(168, 85, 247, 0.4);
  transition: transform 0.2s;
}
.open-btn:hover { transform: scale(1.05); }
.open-btn:active { transform: scale(0.95); }
.open-btn__ring {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.5);
  animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}
.open-btn svg { animation: bounce-soft 2s ease-in-out infinite; }
.open-btn > * { position: relative; }

.envelope__sign {
  margin-top: 32px;
  font-size: 0.75rem;
  color: rgba(45, 27, 61, 0.5);
}
@media (prefers-color-scheme: dark) {
  .envelope__sign { color: rgba(243, 232, 255, 0.5); }
}

/* 9. Layer 2: Memory gallery ---------------------------------------------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  margin: 40px auto;
  max-width: 900px;
  width: 100%;
}
.polaroid {
  background: #fff;
  padding: 12px 12px 36px;
  border-radius: 4px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08), 0 12px 32px rgba(0, 0, 0, 0.18);
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: default;
}
.polaroid:hover {
  transform: translateY(-8px) rotate(0deg) !important;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08), 0 24px 50px rgba(0, 0, 0, 0.25);
}
.polaroid__img-wrap {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 2px;
  background: linear-gradient(135deg, #f9a8d4, #c4b5fd);
}
.polaroid__img-wrap img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.polaroid:hover .polaroid__img-wrap img { transform: scale(1.08); }
.polaroid__img-wrap .polaroid__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.85);
}
.polaroid__date {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.polaroid__caption {
  margin-top: 10px;
  padding: 0 4px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-hand);
  font-size: 1.15rem;
  font-weight: 600;
  color: #2d1b3d;
}
.polaroid__caption .heart {
  width: 14px;
  height: 14px;
  fill: var(--pink);
}

.quote {
  margin-top: 40px;
  font-family: var(--font-hand);
  font-size: clamp(1.5rem, 3vw, 1.8rem);
  color: var(--violet-dark);
}
@media (prefers-color-scheme: dark) {
  .quote { color: #ddd6fe; }
}

/* 10. Layer 3: Cake & candles --------------------------------------------- */
.cake-scene {
  position: relative;
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.cake-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(251, 191, 36, 0.4), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  transition: opacity 0.5s;
}
.cake-glow.out { opacity: 0; }
.cake { width: min(360px, 80vw); height: auto; }

.candle-group { cursor: pointer; transition: opacity 0.3s; }
.candle-group.blown { cursor: default; }
.candle-flame {
  transform-origin: 0 30px;
  animation: flicker 0.18s infinite ease-in-out, glow-pulse 1.8s infinite ease-in-out;
}

.cake-status {
  margin-top: 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(45, 27, 61, 0.7);
}
.cake-status .done { color: #b45309; font-weight: 600; }
@media (prefers-color-scheme: dark) {
  .cake-status { color: rgba(243, 232, 255, 0.7); }
}

.cake-controls {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.cake-hint {
  margin-top: 14px;
  max-width: 380px;
  font-size: 0.75rem;
  color: rgba(45, 27, 61, 0.5);
}
@media (prefers-color-scheme: dark) {
  .cake-hint { color: rgba(243, 232, 255, 0.5); }
}

/* 11. Layer 4: Letter ------------------------------------------------------ */
.letter {
  position: relative;
  max-width: 640px;
  width: 100%;
  margin-top: 28px;
  padding: 32px 28px;
  border-radius: var(--radius);
  background: rgba(45, 27, 61, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-strong);
  text-align: left;
}
.letter__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 20px;
}
.letter__avatar {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f43f5e, #ec4899);
  color: #fff;
  flex-shrink: 0;
}
.letter__from {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.6);
}
.letter__name {
  font-family: var(--font-hand);
  font-size: 1.5rem;
  font-weight: 600;
  color: #fff;
}
.letter__body {
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.95);
  white-space: pre-wrap;
  min-height: 200px;
}
.letter__body .caret {
  display: inline-block;
  width: 2px;
  height: 1em;
  margin-left: 1px;
  background: #fff;
  vertical-align: text-bottom;
  animation: type-caret 0.9s steps(2) infinite;
}
.letter__seal {
  position: absolute;
  right: 24px;
  bottom: 24px;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e11d48, #9f1239);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.4;
  box-shadow: 0 8px 20px rgba(225, 29, 72, 0.4);
  transform: rotate(-12deg);
}

/* 12. Layer 5: Final wish -------------------------------------------------- */
.layer--final { overflow: hidden; }

.final-title {
  font-family: var(--font-script);
  font-size: clamp(3rem, 9vw, 5rem);
  line-height: 1;
  background: linear-gradient(120deg, #db2777 0%, #9333ea 50%, #f59e0b 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 4s linear infinite;
  margin-top: 12px;
}
.final-title__name { display: inline-block; color: var(--violet-dark); -webkit-text-fill-color: var(--violet-dark); }
@media (prefers-color-scheme: dark) {
  .final-title__name { color: #ddd6fe; -webkit-text-fill-color: #ddd6fe; }
}

.final-sub {
  max-width: 600px;
  margin: 16px auto 0;
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: rgba(45, 27, 61, 0.7);
}
@media (prefers-color-scheme: dark) {
  .final-sub { color: rgba(243, 232, 255, 0.7); }
}
.final-sub strong { color: var(--violet-dark); }
@media (prefers-color-scheme: dark) {
  .final-sub strong { color: #ddd6fe; }
}

.age-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 700px;
  width: 100%;
  margin: 32px auto;
}
@media (min-width: 640px) { .age-grid { grid-template-columns: repeat(6, 1fr); } }

.age-cell {
  padding: 12px 8px;
  border-radius: 12px;
  background: rgba(45, 27, 61, 0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
}
.age-cell__value {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, #f9a8d4, #c4b5fd);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.age-cell__label {
  margin-top: 2px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.6);
}

.fun-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  max-width: 580px;
  width: 100%;
  margin: 0 auto 24px;
}
@media (min-width: 640px) { .fun-facts { grid-template-columns: 1fr 1fr; } }

.fun-fact {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  text-align: left;
}
@media (prefers-color-scheme: dark) {
  .fun-fact { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.12); }
}
.fun-fact__icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  flex-shrink: 0;
}
@media (prefers-color-scheme: dark) { .fun-fact__icon { background: rgba(255, 255, 255, 0.1); } }
.fun-fact__title {
  font-family: var(--font-hand);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--violet-dark);
}
@media (prefers-color-scheme: dark) { .fun-fact__title { color: #ddd6fe; } }
.fun-fact__sub { font-size: 0.75rem; color: rgba(45, 27, 61, 0.6); }
@media (prefers-color-scheme: dark) { .fun-fact__sub { color: rgba(243, 232, 255, 0.6); } }

.wish-rotator {
  position: relative;
  height: 90px;
  max-width: 580px;
  width: 100%;
  margin: 0 auto 24px;
}
.wish {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  font-family: var(--font-hand);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  color: var(--violet-dark);
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  filter: blur(4px);
  transition: opacity 0.6s, transform 0.6s, filter 0.6s;
}
.wish.active { opacity: 1; transform: translateY(0); filter: blur(0); }
@media (prefers-color-scheme: dark) { .wish { color: #ddd6fe; } }

.signature { margin-top: 32px; text-align: center; }
.signature p { font-size: 0.85rem; color: rgba(45, 27, 61, 0.6); }
@media (prefers-color-scheme: dark) { .signature p { color: rgba(243, 232, 255, 0.6); } }
.signature__name {
  font-family: var(--font-script);
  font-size: 2rem !important;
  color: var(--violet-dark) !important;
  margin: 4px 0;
}
@media (prefers-color-scheme: dark) { .signature__name { color: #ddd6fe !important; } }
.signature__tag { font-size: 0.75rem !important; opacity: 0.7; }

/* 13b. Restart button (after the final wish) ------------------------------ */
.restart {
  margin: 36px auto 8px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.restart__btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 26px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--violet-dark);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1.5px solid rgba(168, 85, 247, 0.35);
  box-shadow: 0 6px 18px rgba(124, 58, 237, 0.18);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
}
.restart__btn:hover {
  transform: translateY(-2px) scale(1.03);
  background: #fff;
  box-shadow: 0 10px 24px rgba(124, 58, 237, 0.28);
}
.restart__btn:hover svg { animation: spin-once 0.7s ease-in-out; }
.restart__btn:active { transform: scale(0.96); }
.restart__btn > * { position: relative; }
.restart__btn svg { color: var(--rose); }
.restart__ring {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.25);
  animation: pulse-ring 2.4s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}
@keyframes spin-once {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}
@media (prefers-color-scheme: dark) {
  .restart__btn {
    background: rgba(255, 255, 255, 0.08);
    color: #ddd6fe;
    border-color: rgba(168, 85, 247, 0.5);
  }
  .restart__btn:hover { background: rgba(255, 255, 255, 0.14); }
  .restart__btn svg { color: #f9a8d4; }
}
.restart__hint {
  font-size: 0.75rem;
  color: rgba(45, 27, 61, 0.55);
  margin: 0;
}
@media (prefers-color-scheme: dark) {
  .restart__hint { color: rgba(243, 232, 255, 0.55); }
}

/* 13. Confetti ------------------------------------------------------------- */
.confetti-burst {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  overflow: hidden;
}
.confetti-burst span {
  position: absolute;
  top: -5vh;
  animation: confetti-fall linear forwards;
}
.confetti-rain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.confetti-rain span {
  position: absolute;
  top: -5vh;
  animation: confetti-fall linear infinite;
}

/* 14. Footer --------------------------------------------------------------- */
.footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 0.8rem;
  color: rgba(45, 27, 61, 0.55);
}
@media (prefers-color-scheme: dark) { .footer { color: rgba(243, 232, 255, 0.55); } }
.footer__heart { color: var(--rose); }
.footer__hint { margin-top: 6px; font-size: 0.7rem; opacity: 0.7; }

/* 15. Mobile tweaks -------------------------------------------------------- */
@media (max-width: 640px) {
  .layer { padding: 60px 18px; }
  .gallery { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .polaroid { padding: 8px 8px 28px; }
  .polaroid__caption { font-size: 0.95rem; }
  .letter { padding: 24px 18px; }
  .letter__body { font-size: 0.85rem; line-height: 1.65; }
  .letter__seal { width: 52px; height: 52px; right: 16px; bottom: 16px; }
  .cake-controls .btn { font-size: 13px; padding: 8px 16px; }
}

@media (max-width: 380px) {
  .gallery { grid-template-columns: 1fr; }
  .envelope__title { font-size: 3rem; }
  .envelope__name { font-size: 2.2rem; }
}