:root {
  --sky-top: #e4f8ff;
  --sky-mid: #f3fbff;
  --sky-bottom: #ffeaf5;
  --cloud: rgba(255, 255, 255, 0.9);
  --bubble-blue: rgba(191, 233, 255, 0.5);
  --bubble-pink: rgba(255, 204, 230, 0.46);
  --bubble-yellow: rgba(255, 244, 191, 0.38);
  --card: rgba(255, 255, 255, 0.92);
  --text: #4b3c7a;
  --shadow: 0 20px 48px rgba(90, 96, 164, 0.14);
  --radius: 28px;
  --button-bg: #ff97c9;
  --button-bg-hover: #ff7ebb;
  --button-text: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  height: -webkit-fill-available;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 46%, var(--sky-bottom) 100%);
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  min-height: -webkit-fill-available;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 24px;
  overflow-x: hidden;
  position: relative;
  background:
    radial-gradient(circle at 10% 10%, rgba(255, 248, 196, 0.8) 0 8%, transparent 9%),
    radial-gradient(circle at 16% 15%, var(--cloud) 0 4%, transparent 5%),
    radial-gradient(circle at 22% 15%, var(--cloud) 0 5%, transparent 6%),
    radial-gradient(circle at 28% 15%, var(--cloud) 0 4%, transparent 5%),
    radial-gradient(circle at 74% 14%, var(--cloud) 0 4%, transparent 5%),
    radial-gradient(circle at 80% 14%, var(--cloud) 0 5%, transparent 6%),
    radial-gradient(circle at 86% 14%, var(--cloud) 0 4%, transparent 5%),
    radial-gradient(circle at 14% 34%, var(--bubble-blue) 0 8%, transparent 9%),
    radial-gradient(circle at 85% 28%, var(--bubble-pink) 0 9%, transparent 10%),
    radial-gradient(circle at 18% 74%, var(--bubble-blue) 0 11%, transparent 12%),
    radial-gradient(circle at 80% 78%, var(--bubble-pink) 0 12%, transparent 13%),
    radial-gradient(circle at 40% 88%, var(--bubble-yellow) 0 16%, transparent 17%),
    radial-gradient(circle at 92% 92%, rgba(255, 227, 244, 0.55) 0 14%, transparent 15%),
    linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 46%, var(--sky-bottom) 100%);
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: scroll;
}

.wrap {
  width: min(100%, 980px);
  position: relative;
  z-index: 1;
}

.card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(20px, 3vw, 36px);
  text-align: center;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(1.75rem, 3vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 24px;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.5;
}

.video-shell {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 14px 30px rgba(44, 36, 96, 0.18);
  background: #000;
}

#player,
#player iframe {
  width: 100%;
  height: 100%;
  display: block;
}

.sound-button {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  border: 0;
  border-radius: 999px;
  padding: 12px 20px;
  background: var(--button-bg);
  color: var(--button-text);
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
  transition: transform 0.2s ease, background 0.2s ease, opacity 0.2s ease;
}

.sound-button:hover,
.sound-button:focus-visible {
  background: var(--button-bg-hover);
  transform: translateX(-50%) scale(1.03);
}

.sound-button.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.sparkles {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
}

@media (max-width: 480px) {
  body {
    padding: 14px;
  }

  .card {
    border-radius: 22px;
    padding: 16px;
  }

  .video-shell {
    border-radius: 18px;
  }

  .sound-button {
    width: calc(100% - 24px);
    bottom: 12px;
  }
}