:root {
  --sky-top: #4cb7f5;
  --sky-bot: #87d5ff;
  --ink: #143a5a;
  --ink-soft: #2a5a82;
  --yellow: #ffcc2e;
  --yellow-dark: #f0a900;
  --white: #ffffff;
  --shadow: 0 10px 0 rgba(20, 58, 90, 0.18);
}

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

html,
body {
  min-height: 100%;
  width: 100%;
  font-family: "Fredoka", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-bot) 100%);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  min-height: 100svh;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* sky / clouds */
.sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.cloud {
  position: absolute;
  background: #fff;
  border-radius: 999px;
  filter: blur(0.5px);
  opacity: 0.95;
  box-shadow:
    40px 10px 0 -2px #fff,
    80px 20px 0 -6px #fff,
    -40px 14px 0 -2px #fff,
    -80px 24px 0 -6px #fff,
    20px -14px 0 -4px #fff,
    -20px -10px 0 -3px #fff;
  animation: drift linear infinite;
}

.cloud--1 {
  width: 110px;
  height: 28px;
  top: 8%;
  left: -15%;
  animation-duration: 80s;
}
.cloud--2 {
  width: 70px;
  height: 20px;
  top: 22%;
  left: -20%;
  animation-duration: 110s;
  animation-delay: -30s;
  opacity: 0.85;
}
.cloud--3 {
  width: 140px;
  height: 32px;
  top: 60%;
  left: -25%;
  animation-duration: 95s;
  animation-delay: -60s;
}
.cloud--4 {
  width: 90px;
  height: 24px;
  top: 78%;
  left: -10%;
  animation-duration: 120s;
  animation-delay: -10s;
  opacity: 0.9;
}
.cloud--5 {
  width: 60px;
  height: 18px;
  top: 40%;
  left: -30%;
  animation-duration: 140s;
  animation-delay: -90s;
  opacity: 0.8;
}

@keyframes drift {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(140vw);
  }
}

/* page */
.page {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 24px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.middle {
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 36px;
}

/* hero */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.coin {
  width: clamp(220px, 46vw, 360px);
  height: auto;
  display: block;
  filter: drop-shadow(0 18px 30px rgba(20, 58, 90, 0.25));
  animation: bob 3.6s ease-in-out infinite;
  user-select: none;
  -webkit-user-drag: none;
}

@keyframes bob {
  0%,
  100% {
    transform: translateY(0) rotate(-2deg);
  }
  50% {
    transform: translateY(-10px) rotate(2deg);
  }
}

.tagline {
  margin: 0;
  display: flex;
  justify-content: center;
  line-height: 0;
}

.tagline img {
  width: clamp(280px, 78vw, 560px);
  height: auto;
  display: block;
  filter: drop-shadow(0 12px 18px rgba(20, 58, 90, 0.25));
  user-select: none;
  -webkit-user-drag: none;
}

/* top nav */
.topnav {
  position: relative;
  z-index: 5;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(28px, 7vw, 64px);
  padding: clamp(36px, 6vh, 72px) 24px 8px;
}

.topnav__link {
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.35rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-shadow:
    0 2px 0 var(--ink),
    0 4px 0 rgba(20, 58, 90, 0.35);
  transition: transform 0.12s ease, color 0.12s ease;
}

.topnav__link:hover {
  color: var(--yellow);
  transform: translateY(-1px);
}

/* footer */
.foot {
  margin-top: auto;
  padding-top: 12px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
  opacity: 0.85;
  text-transform: lowercase;
}

/* music toggle + volume panel */
.audio {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 8px;
}

.music {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--yellow);
  color: var(--ink);
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  flex-shrink: 0;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.music:hover {
  transform: translateY(-2px);
  background: #ffd84d;
  box-shadow: 0 12px 0 rgba(20, 58, 90, 0.2);
}

.music:active {
  transform: translateY(2px);
  box-shadow: 0 6px 0 rgba(20, 58, 90, 0.2);
}

.music__icon {
  width: 24px;
  height: 24px;
  display: block;
}

.music.playing .music__icon {
  animation: notebob 0.6s ease-in-out infinite alternate;
}

@keyframes notebob {
  from {
    transform: translateY(0) rotate(-6deg);
  }
  to {
    transform: translateY(-3px) rotate(6deg);
  }
}

.audio__panel {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px;
  box-shadow: var(--shadow);
  transform-origin: right center;
  transform: translateX(12px) scale(0.9);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.22s cubic-bezier(0.2, 0.9, 0.3, 1.2),
    opacity 0.18s ease;
}

.audio__panel.open {
  transform: translateX(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

.audio__low,
.audio__high {
  display: inline-flex;
  color: var(--ink-soft);
}

.audio__slider {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(
    to right,
    var(--yellow-dark) 0% var(--vol, 22%),
    rgba(20, 58, 90, 0.15) var(--vol, 22%) 100%
  );
  outline: none;
  cursor: pointer;
  margin: 0;
}

.audio__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--yellow);
  border: 2px solid var(--ink);
  box-shadow: 0 2px 0 rgba(20, 58, 90, 0.25);
  cursor: grab;
}

.audio__slider::-webkit-slider-thumb:active {
  cursor: grabbing;
}

.audio__slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--yellow);
  border: 2px solid var(--ink);
  box-shadow: 0 2px 0 rgba(20, 58, 90, 0.25);
  cursor: grab;
}

@media (max-width: 480px) {
  .audio__slider {
    width: 96px;
  }
}

#player {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  z-index: -1;
}

@media (max-width: 480px) {
  .page {
    gap: 28px;
    padding: 24px 16px 20px;
  }
  .ca__text {
    max-width: 50vw;
    font-size: 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .coin,
  .cloud {
    animation: none !important;
  }
}