html {
  scroll-behavior: smooth;
  color-scheme: light only;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  overflow-y: scroll;
  background: #0b2a29;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  color: white;
  text-align: center;
  font-family: 'Caveat', cursive;
}

#musicBtn {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  font-size: 22px;
  cursor: pointer;
  background: rgba(114, 180, 189, 0.292);
  backdrop-filter: blur(10px);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.3s;
  z-index: 1000;
}

#musicBtn:hover {
  transform: scale(1.1);
}

.muted::after {
  content: "";
  position: absolute;
  width: 35px;
  height: 3px;
  background: rgb(12, 42, 52);
  transform: rotate(45deg);
}

.letter-title,
.page4-title,
.gift-title {
  font-family: 'Caveat', cursive;
  font-size: 36px;
}

p {
  font-family: 'Caveat', cursive;
  font-size: 22px;
  letter-spacing: 1px;
  text-shadow: 0 0 8px rgba(255, 200, 255, 0.4);
}

.hidden {
  display: none;
}

.page {
  width: 100%;
  min-height: 100vh;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 2s ease forwards;
}

#stars {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.star {
  position: absolute;
  width: 2px;
  height: 2px;
  background: white;
  border-radius: 50%;
  animation: twinkle 2s infinite ease-in-out;
}

@keyframes twinkle {
  0%, 100% {
    opacity: 0.2;
  }
  50% {
    opacity: 1;
  }
}

.emoji {
  position: fixed;
  font-size: 24px;
  pointer-events: none;
  filter: drop-shadow(0 0 6px #1f537d);
  animation: floatSoft 6s ease-in-out infinite;
}

.moon {
  top: 90px;
  left: 200px;
}

.heart {
  top: 190px;
  right: 300px;
}

.spark {
  top: 550px;
  right: 40px;
}

.flower {
  bottom: 60px;
  left: 80px;
}

@keyframes floatSoft {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-8px); 
  }
  100% {
    transform: translateY(0px);
  }
}

.container {
  margin-top: 50px;
  opacity: 0;
  transform: translateY(40px) scale(0.9);
  animation: fadeUp 2s ease forwards;
}

@keyframes fadeUp {
  0% {
    opacity: 0;
    transform: translateY(40px) scale(0.9);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.line {
  font-size: 22px;
  color: #b9daee;
  margin: 20px;
  line-height: 1.6;
}

#letterBox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
  transition: 0.4s;
  display: flex;
  justify-content: center;
  align-items: center;
}

.letter {
  max-width: 500px;
  width: 80%;
  padding: 30px;
  border-radius: 20px;
  margin: auto;
  background: rgba(46, 139, 165, 0.119);
  backdrop-filter: blur(12px);
  color: #b9daee;
  font-family: cursive;
  line-height: 1.8;
  text-align: center;
  opacity: 0;
  animation: smoothPop 2s ease forwards;
}

@keyframes smoothPop {
  0% {
    opacity: 0;
    transform: scale(0.7);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.letter-title {
  margin-bottom: 70px;
  font-size: 42px;
  color: #bb95c4;
}

.page3-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  transform: scale(0);
  animation: popIn 2s ease forwards;
}

@keyframes popIn {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

#page3Text {
  font-size: 22px;
  color: #b9daee;
  opacity: 0;
  margin: 30px;
  transition: opacity 0.5s;
}

.page4-container {
  padding: 40px 20px;
  text-align: center;
}

.page4-title {
  color: #bb95c4;
  margin-bottom: 30px;
  opacity: 0;
  animation: slideUpFade 2s ease forwards;
  animation-delay: 0.2s;
}

.cards {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  opacity: 0;
  animation: slideUpFade 2s ease forwards;
  animation-delay: 0.8s;
}

.card {
  width: 200px;
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  transition: 0.4s ease;
  transform: rotate(-3deg);
}

.card:nth-child(2) {
  transform: rotate(2deg);
}
.card:nth-child(3) {
  transform: rotate(-2deg);
}

.card img {
  width: 100%;
  display: block;
  border-radius: 20px;
  transition: 0.4s;
}

.page4-text {
  margin-top: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  color: #b9daee;
  line-height: 1.8;
  font-size: 22px;
  opacity: 0;
  animation: slideUpFade 2s ease forwards;
  animation-delay: 1.5s;
}

.final-line {
  margin-top: 20px;
  font-size: 22px;
  color: #bb95c4;
  opacity: 0;
  animation: slideUpFade 2s ease forwards;
  animation-delay: 2.5s;
}

@keyframes slideUpFade {
  0% {
    opacity: 0;
    transform: translateY(60px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.page5-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 2s ease forwards;
}

.page5-text {
  font-size: 28px;
  color: #bb95c4;
  margin-bottom: 10px;
}

.page5-subtext {
  font-size: 22px;
  color: #b9daee;
  line-height: 1.6;
}

.page6-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 2s ease forwards;
}

.page6-text {
  font-size: 28px;
  color: #bb95c4;
  margin-bottom: 15px;
}

.page6-subtext {
  font-size: 22px;
  color: #b9daee;
  line-height: 1.8;
  max-width: 450px;
}

.page7-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 2s ease forwards;
}

.page7-text {
  margin-top: 20px;
  font-size: 22px;
  color: #b9daee;
  line-height: 1.6;
}

.gift-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  text-align: center;
  opacity: 0;
  transform: translateY(50px);
  animation: fadeUp 2s ease forwards;
}

.gift-img {
  width: 180px;
  margin: 30px 0;
  cursor: pointer;
  animation: floatGift 2.5s ease-in-out infinite;
  transition: 0.3s;
  filter: drop-shadow(0 0 15px rgba(255, 200, 100, 0.6));
}

.gift-img:hover {
  transform: scale(1.1);
}

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


@keyframes floatBox {
  0% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
  100% { transform: translateY(0); }
}

.gift-title{
  color: #bb95c4;
}
.final-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  text-align: center;
  opacity: 0;
  transform: translateY(50px);
  animation: fadeUp 2s ease forwards;
}

.final-text {
  max-width: 500px;
  color: #f5c6ff;
  line-height: 1.7;
  font-size: 22px;
}

.gif {
  width: 300px;
  filter: drop-shadow(0 0 10px #154642) drop-shadow(0 0 20px #44cfe7);
}

.letter-gif {
  width: 150px;
  margin-bottom: 15px;
  filter: drop-shadow(0 0 10px #096479) drop-shadow(0 0 20px #a5c7d4);
}

.page3-gif {
  width: 180px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 10px #154642) drop-shadow(0 0 20px #44cfe7);
}

.page5-gif {
  width: 180px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 10px #154642) drop-shadow(0 0 20px #44cfe7);
}

.page6-gif {
  width: 180px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 10px #154642) drop-shadow(0 0 20px #44cfe7);
}

.final-gif {
  width: 220px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 10px #154642) drop-shadow(0 0 20px #44cfe7);
}

button {
  margin-top: 30px;
  padding: 12px 25px;
  font-size: 16px;
  border: none;
  border-radius: 20px;
  background: linear-gradient(to right, #0a0d35, #44cfe7);
  color: white;
  box-shadow: 
    6px 6px 15px rgba(0, 0, 0, 0.4),   
    6px 6px 20px rgba(68, 207, 231, 0.5);
  cursor: pointer;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  letter-spacing: 0.5px;
}


button:hover {
  transform: scale(1.1);
}

#continueBtn {
  margin-top: 20px;
  padding: 10px 20px;
  border-radius: 15px;
  border: none;
  background: linear-gradient(to right, #0b5960, #44cfe7);
  color: white;
  cursor: pointer;
}

#continueBtn:hover {
  transform: scale(1.1);
}

#readLetterBtn {
  margin-top: 25px;
  padding: 12px 25px;
  border: none;
  border-radius: 20px;
  background: linear-gradient(to right, #0a0d35, #44cfe7);
  color: white;
  cursor: pointer;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

#readLetterBtn:hover {
  transform: scale(1.1);
}

#needYouBtn {
  margin-top: 30px;
  padding: 12px 25px;
  font-size: 16px;
  border: none;
  border-radius: 20px;
  background: linear-gradient(to right, #0a0d35, #44cfe7);
  color: white;
  cursor: pointer;
  opacity: 0;
  animation: slideUpFade 2s ease forwards;
  animation-delay: 3.5s;
}

#needYouBtn:hover {
  transform: scale(1.1);
}

#SorryBtn {
  margin-top: 40px;
  padding: 14px 30px;
  font-size: 17px;
  border: none;
  border-radius: 25px;
  background: linear-gradient(to right, #0a0d35, #44cfe7);
  color: white;
  cursor: pointer;
}

#SorryBtn:hover {
  transform: scale(1.1);
}

.page6-buttons {
  margin-top: 30px;
}

#yesBtn {
  margin: 10px;
  padding: 12px 25px;
  border-radius: 20px;
  border: none;
  background: linear-gradient(to right, #0a0d35, #44cfe7);
  color: white;
  cursor: pointer;
  transition: 0.3s;
}

#yesBtn:hover {
  transform: scale(1.1);
}

.exit-up {
  animation: slideUpExit 2s ease-out forwards;
}

@keyframes slideUpExit {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(-100px);
  }
}

@media (max-width: 768px) {

  body {
    padding: 15px;
  }

  p {
    font-size: 20px;
    line-height: 1.6;
  }

  .line {
    font-size: 20px;
  }

  .letter-title,
  .page4-title,
  .gift-title {
    font-size: 30px;
  }

  .gif {
    width: 260px;
  }

  .page3-gif,
  .page5-gif,
  .page6-gif {
    width: 200px;
  }

  .final-gif {
    width: 220px;
  }

  .letter {
    width: 95%;
    padding: 20px;
  }

  .cards {
  display: flex;
  flex-direction: row;   
  justify-content: center;
  gap: 10px;
  flex-wrap: nowrap;    
  }

  .card {
     width: 30%;   
  transform: rotate(0deg);
  }

  .card img {
  height: 130px;
  object-fit: cover;
  }

  button {
    font-size: 16px;
    padding: 12px 20px;
  }

  #musicBtn {
    width: 45px;
    height: 45px;
    font-size: 20px;
  }

  .gift-img {
    width: 180px;
  }

  .final-text {
    font-size: 18px;
  }

}