:root {
  --bg: #fff7fb;
  --accent: #ff8fb1;
  --accent-2: #8ee7d6;
  --text: #333;
  --card: #fff;
}
* {
  box-sizing: border-box;
}
body {
  font-family: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto,
    sans-serif;
  margin: 0;
  background: linear-gradient(180deg, var(--bg), #fff);
  color: var(--text);
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.card {
  width: 950px;
  max-width: 100%;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.9),
    rgba(255, 255, 255, 0.95)
  );
  border-radius: 18px;
  box-shadow: 0 8px 30px rgba(20, 20, 30, 0.08);
  padding: 28px;
  position: relative;
  overflow: hidden;
}
header {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
}
.title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.subtitle {
  font-size: 0.95rem;
  color: #666;
}
.countdown {
  display: flex;
  gap: 10px;
  align-items: center;
}
.countdown .box {
  background: var(--card);
  border-radius: 10px;
  padding: 10px 12px;
  text-align: center;
  min-width: 62px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
}
.countdown .n {
  font-weight: 700;
  font-size: 1.1rem;
}
#click {
  text-decoration: none;
  color: #b03b6b;
  font-weight: bold;
}
.typed {
  height: 25px;
  margin-top: 14px;
  font-weight: 500;
  color: #444;
}
main {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 22px;
  margin-top: 18px;
}
.left {
  padding: 8px;
}
.reasons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 12px;
}
.flip {
  perspective: 800px;
}
.card-face {
  position: relative;
  height: 120px;
  border-radius: 12px;
  background: linear-gradient(180deg, #fff, #fffafc);
  box-shadow: 0 6px 18px rgba(20, 20, 30, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 600ms;
}
.flip:hover .card-face {
  transform: rotateY(180deg);
}
.front,
.back {
  backface-visibility: hidden;
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border-radius: 12px;
}
.front {
  font-weight: 700;
  color: var(--accent);
}
.back {
  transform: rotateY(180deg);
  color: #444;
  padding: 14px;
  text-align: center;
  font-weight: 500;
}
/* right column */
.right {
  padding: 10px;
  border-radius: 12px;
  background: linear-gradient(180deg, #fff, #fffdfd);
  box-shadow: 0 8px 26px rgba(20, 20, 30, 0.04);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.photo {
  position: relative;
  height: 220px;
  /* border-radius: px; */
  overflow: hidden;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
}

.photo .slide {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
  transform: translateX(-100%);
  transition: transform 900ms cubic-bezier(0.22, 0.9, 0.35, 1), opacity 900ms;
  opacity: 1;
}

.photo .slide.show {
  transform: translateX(0%);
}

.photo .slide.out {
  transform: translateX(100%);
  opacity: 0.98;
}

.photo .photo-text {
  position: relative;
  z-index: 5;
  pointer-events: none;
  transition: opacity 300ms;
}
.photo .hidden-text {
  opacity: 0;
}

.reveal {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.btn {
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(255, 143, 177, 0.18);
}
.gift {
  padding: 12px;
  border-radius: 10px;
  background: #fff;
  border: 1px dashed #f2c0d0;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #b03b6b;
  font-weight: 700;
}
.hearts {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.heart {
  color: #ff8fb1;
  position: absolute;
  font-size: 18px;
  opacity: 0.9;
  transform: translateY(-20px) rotate(0deg);
  animation: fall linear infinite;
}
@keyframes fall {
  to {
    transform: translateY(110vh) rotate(360deg);
    opacity: 0.05;
  }
}
@media screen and (max-width: 700px) {
  .card {
    padding: 20px;
  }
  header {
    flex-direction: column-reverse;
  }
  .title {
    text-align: center;
    margin: 15px 0;
  }
  .typed {
    height: 30px;
    margin: 10px 0;
  }
  .right h1 {
    font-size: 1.6rem;
    text-align: center;
  }
  div[style="font-weight: 700"] {
    text-align: center;
  }
  .subtitle {
    display: none;
  }
}
@media (max-width: 880px) {
  main {
    grid-template-columns: 1fr;
  }
  .right {
    order: -1;
  }
  .reasons {
    grid-template-columns: 1fr;
  }
}