:root {
  --deep-sea: #063a4c;
  --lagoon: #047c8c;
  --aqua: #1ecad3;
  --seafoam: #8df0dc;
  --pearl: #fff6dc;
  --coral: #ff6f61;
  --shell-pink: #ffb6b9;
  --lavender: #b39ddb;
  --gold: #ffd166;
  --shadow: rgba(1, 20, 31, 0.45);
  --glass: rgba(255, 246, 220, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  color: var(--pearl);
  font-family: Arial, Helvetica, sans-serif;
  overflow-x: hidden;
}

button,
a,
input {
  font: inherit;
}

.page {
  background:
    radial-gradient(circle at 20% 18%, rgba(141, 240, 220, 0.45), transparent 24rem),
    radial-gradient(circle at 84% 28%, rgba(255, 111, 97, 0.32), transparent 20rem),
    linear-gradient(160deg, var(--deep-sea), var(--lagoon) 54%, #035264);
}

.landing-page {
  background:
    radial-gradient(circle at 50% -14%, rgba(255, 246, 220, 0.34), transparent 24rem),
    radial-gradient(circle at 16% 26%, rgba(141, 240, 220, 0.34), transparent 19rem),
    radial-gradient(circle at 86% 34%, rgba(255, 111, 97, 0.24), transparent 18rem),
    linear-gradient(180deg, #0c8a9a 0%, var(--lagoon) 26%, #055b72 64%, #032f44 100%);
}

.shipwreck-page {
  background:
    radial-gradient(circle at 50% -18%, rgba(141, 240, 220, 0.22), transparent 23rem),
    radial-gradient(circle at 86% 22%, rgba(179, 157, 219, 0.18), transparent 18rem),
    radial-gradient(circle at 18% 62%, rgba(255, 111, 97, 0.16), transparent 15rem),
    linear-gradient(180deg, #075b72 0%, #04384f 38%, #032536 70%, #01141f 100%);
}

.ocean-scene {
  position: relative;
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 2rem;
  isolation: isolate;
  overflow: hidden;
}

.underwater-depth {
  position: absolute;
  inset: 0;
  z-index: -4;
  background:
    linear-gradient(180deg, rgba(255, 246, 220, 0.18), transparent 22%),
    radial-gradient(ellipse at 50% 118%, rgba(1, 20, 31, 0.62), transparent 52%),
    linear-gradient(90deg, rgba(3, 47, 68, 0.28), transparent 24%, transparent 76%, rgba(3, 47, 68, 0.3));
  pointer-events: none;
}

.abyss-depth {
  position: absolute;
  inset: 0;
  z-index: -4;
  background:
    linear-gradient(180deg, rgba(255, 246, 220, 0.1), transparent 18%),
    radial-gradient(ellipse at 50% 106%, rgba(1, 20, 31, 0.82), transparent 44%),
    linear-gradient(90deg, rgba(1, 20, 31, 0.38), transparent 30%, transparent 70%, rgba(1, 20, 31, 0.42));
}

.caustics {
  position: absolute;
  inset: -18% -20%;
  z-index: -3;
  background-image:
    repeating-radial-gradient(ellipse at 16% 20%, rgba(255, 246, 220, 0.16) 0 0.06rem, transparent 0.12rem 1.3rem),
    repeating-radial-gradient(ellipse at 72% 28%, rgba(141, 240, 220, 0.13) 0 0.05rem, transparent 0.11rem 1.1rem);
  filter: blur(0.45px);
  mix-blend-mode: screen;
  opacity: 0.72;
  transform-origin: center;
}

.caustics-two {
  opacity: 0.38;
  transform: rotate(9deg) scale(1.12);
}

.deep-caustics {
  position: absolute;
  inset: -16% -20%;
  z-index: -3;
  background:
    repeating-radial-gradient(ellipse at 30% 20%, rgba(141, 240, 220, 0.08) 0 0.05rem, transparent 0.11rem 1.45rem),
    repeating-radial-gradient(ellipse at 76% 30%, rgba(255, 246, 220, 0.07) 0 0.04rem, transparent 0.1rem 1.2rem);
  filter: blur(1px);
  mix-blend-mode: screen;
  opacity: 0.46;
}

.light-rays {
  position: absolute;
  inset: -10% -20%;
  z-index: -3;
  background:
    linear-gradient(105deg, transparent 18%, rgba(255, 246, 220, 0.15) 22%, transparent 30%),
    linear-gradient(78deg, transparent 44%, rgba(141, 240, 220, 0.14) 48%, transparent 56%),
    linear-gradient(132deg, transparent 62%, rgba(255, 209, 102, 0.12) 67%, transparent 74%);
  animation: rays 8s ease-in-out infinite alternate;
}

.landing-page .light-rays {
  inset: -24% -30% 10%;
  background:
    linear-gradient(104deg, transparent 15%, rgba(255, 246, 220, 0.22) 20%, transparent 31%),
    linear-gradient(76deg, transparent 40%, rgba(141, 240, 220, 0.2) 47%, transparent 58%),
    linear-gradient(132deg, transparent 58%, rgba(255, 209, 102, 0.13) 65%, transparent 75%);
  filter: blur(1.5px);
  opacity: 0.82;
}

.shipwreck-page .light-rays {
  inset: -28% -32% 24%;
  opacity: 0.38;
  filter: blur(2.5px);
}

.hero-shell,
.message-panel {
  width: min(46rem, 100%);
  border: 1px solid rgba(255, 246, 220, 0.28);
  border-radius: 2rem 2rem 3.5rem 3.5rem;
  background: linear-gradient(145deg, rgba(255, 246, 220, 0.18), rgba(4, 124, 140, 0.22));
  box-shadow: 0 2rem 5rem var(--shadow), inset 0 0 3rem rgba(141, 240, 220, 0.18);
  padding: clamp(2rem, 7vw, 4.5rem);
  text-align: center;
  backdrop-filter: blur(14px);
}

.hero-shell {
  animation: float-shell 4.5s ease-in-out infinite;
}

.landing-page .hero-shell {
  border-color: rgba(141, 240, 220, 0.36);
  background:
    linear-gradient(145deg, rgba(255, 246, 220, 0.17), rgba(4, 124, 140, 0.2)),
    radial-gradient(circle at 50% 0%, rgba(255, 209, 102, 0.1), transparent 56%);
  box-shadow:
    0 2rem 5rem rgba(1, 20, 31, 0.5),
    inset 0 0 3.2rem rgba(141, 240, 220, 0.2),
    0 0 5rem rgba(30, 202, 211, 0.12);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--gold);
  font-size: clamp(0.85rem, 2vw, 1rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--pearl);
  font-size: clamp(2.4rem, 8vw, 5.8rem);
  line-height: 0.96;
  text-shadow: 0 0.35rem 1.5rem rgba(6, 58, 76, 0.65);
}

.message-panel h1 {
  font-size: clamp(2.1rem, 6vw, 4.8rem);
}

.shipwreck-page .message-panel {
  align-self: end;
  margin-bottom: clamp(5.5rem, 13vh, 9rem);
  width: min(48rem, 100%);
  border-color: rgba(141, 240, 220, 0.24);
  background: linear-gradient(145deg, rgba(1, 20, 31, 0.56), rgba(4, 56, 79, 0.42));
  box-shadow:
    0 1.6rem 4.5rem rgba(1, 20, 31, 0.62),
    inset 0 0 2.4rem rgba(141, 240, 220, 0.12);
}

.shipwreck-page .message-panel h1 {
  font-size: clamp(2rem, 5vw, 4.15rem);
}

.hero-copy,
.message-panel p:not(.eyebrow) {
  max-width: 34rem;
  margin: 1.4rem auto 0;
  color: rgba(255, 246, 220, 0.9);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  line-height: 1.6;
}

.enter-button,
.control-button,
.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--coral), var(--shell-pink) 55%, var(--gold));
  box-shadow: 0 1rem 2rem rgba(1, 20, 31, 0.28);
  color: #172f3b;
  cursor: pointer;
  font-weight: 800;
  margin-top: 2rem;
  padding: 0.9rem 2rem;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.enter-button:hover,
.control-button:hover,
.back-link:hover {
  box-shadow: 0 1.2rem 2.4rem rgba(1, 20, 31, 0.36);
  transform: translateY(-2px);
}

.enter-button:focus-visible,
.control-button:focus-visible,
.back-link:focus-visible,
input:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
}

.audio-note {
  min-height: 1.4rem;
  margin: 1.1rem 0 0;
  color: rgba(255, 246, 220, 0.78);
  font-size: 0.95rem;
}

.mom-list {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem auto 0;
  max-width: 38rem;
  text-align: left;
}

.mom-list label {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
}

.mom-list span {
  display: inline-grid;
  width: 1rem;
  height: 1rem;
  place-items: center;
  border: 2px solid rgba(255, 246, 220, 0.42);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--gold), var(--coral) 68%);
  box-shadow: 0 0 0.85rem rgba(255, 209, 102, 0.28);
}

.mom-list input {
  width: 100%;
  min-height: 3rem;
  border: 1px solid rgba(141, 240, 220, 0.28);
  border-radius: 0.85rem;
  background: rgba(255, 246, 220, 0.12);
  color: var(--pearl);
  padding: 0.75rem 0.95rem;
  box-shadow: inset 0 0 1rem rgba(1, 20, 31, 0.2);
}

.mom-list input::placeholder {
  color: rgba(255, 246, 220, 0.58);
}

.music-controls {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  border: 1px solid rgba(255, 246, 220, 0.22);
  border-radius: 1.25rem;
  background: rgba(6, 58, 76, 0.62);
  box-shadow: 0 1rem 2.5rem var(--shadow);
  padding: 0.9rem;
  backdrop-filter: blur(12px);
}

.music-controls .control-button {
  min-height: 2.75rem;
  margin: 0;
  padding: 0.7rem 1.2rem;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--pearl);
  font-weight: 700;
}

.volume-control input {
  accent-color: var(--coral);
  width: min(10rem, 26vw);
}

.music-controls .audio-note {
  margin: 0;
}

.bubbles span {
  position: absolute;
  bottom: -8rem;
  width: var(--size, 1.4rem);
  height: var(--size, 1.4rem);
  left: var(--left, 50%);
  border: 2px solid rgba(255, 246, 220, 0.42);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255, 246, 220, 0.8), rgba(141, 240, 220, 0.12) 38%, transparent 70%);
  animation: bubble var(--speed, 9s) linear infinite;
  animation-delay: var(--delay, 0s);
}

.shipwreck-page .bubbles span {
  opacity: 0.62;
  filter: blur(0.2px);
}

.landing-page .bubbles span {
  border-color: rgba(255, 246, 220, 0.5);
  box-shadow:
    inset 0.1rem 0.1rem 0.35rem rgba(255, 246, 220, 0.35),
    0 0 1.2rem rgba(141, 240, 220, 0.22);
}

.marine-snow i {
  position: absolute;
  top: var(--top, 20%);
  left: var(--left, 50%);
  width: var(--size, 0.22rem);
  height: var(--size, 0.22rem);
  border-radius: 50%;
  background: rgba(255, 246, 220, 0.74);
  box-shadow: 0 0 0.7rem rgba(141, 240, 220, 0.38);
  opacity: var(--opacity, 0.42);
  animation: snow-drift var(--speed, 9s) ease-in-out infinite alternate;
  animation-delay: var(--delay, 0s);
}

.marine-snow i:nth-child(1) {
  --top: 9%;
  --left: 9%;
  --speed: 8s;
}

.marine-snow i:nth-child(2) {
  --top: 23%;
  --left: 17%;
  --size: 0.16rem;
  --speed: 10s;
  --delay: -3s;
}

.marine-snow i:nth-child(3) {
  --top: 15%;
  --left: 33%;
  --opacity: 0.52;
  --speed: 12s;
}

.marine-snow i:nth-child(4) {
  --top: 38%;
  --left: 44%;
  --size: 0.14rem;
  --delay: -5s;
}

.marine-snow i:nth-child(5) {
  --top: 28%;
  --left: 59%;
  --speed: 11s;
}

.marine-snow i:nth-child(6) {
  --top: 47%;
  --left: 73%;
  --size: 0.18rem;
  --delay: -2s;
}

.marine-snow i:nth-child(7) {
  --top: 14%;
  --left: 88%;
  --speed: 13s;
}

.marine-snow i:nth-child(8) {
  --top: 62%;
  --left: 22%;
  --size: 0.2rem;
  --delay: -4s;
}

.marine-snow i:nth-child(9) {
  --top: 66%;
  --left: 64%;
  --opacity: 0.34;
}

.marine-snow i:nth-child(10) {
  --top: 76%;
  --left: 81%;
  --size: 0.15rem;
  --speed: 12s;
}

.bubbles span:nth-child(1) {
  --left: 8%;
  --size: 1rem;
  --speed: 8s;
}

.bubbles span:nth-child(2) {
  --left: 22%;
  --size: 2.2rem;
  --speed: 11s;
  --delay: -5s;
}

.bubbles span:nth-child(3) {
  --left: 38%;
  --size: 1.5rem;
  --speed: 10s;
  --delay: -2s;
}

.bubbles span:nth-child(4) {
  --left: 52%;
  --size: 2.8rem;
  --speed: 13s;
  --delay: -7s;
}

.bubbles span:nth-child(5) {
  --left: 68%;
  --size: 1.2rem;
  --speed: 9s;
  --delay: -3s;
}

.bubbles span:nth-child(6) {
  --left: 82%;
  --size: 2rem;
  --speed: 12s;
  --delay: -6s;
}

.bubbles span:nth-child(7) {
  --left: 92%;
  --size: 1.3rem;
  --speed: 8s;
  --delay: -1s;
}

.bubbles span:nth-child(8) {
  --left: 15%;
  --size: 2.6rem;
  --speed: 14s;
  --delay: -8s;
}

.wave {
  position: absolute;
  right: -10%;
  bottom: -5rem;
  left: -10%;
  z-index: -1;
  height: 12rem;
  background:
    radial-gradient(ellipse at 16% 0%, rgba(141, 240, 220, 0.7) 0 28%, transparent 30%),
    radial-gradient(ellipse at 48% 0%, rgba(255, 182, 185, 0.52) 0 26%, transparent 28%),
    radial-gradient(ellipse at 78% 0%, rgba(255, 209, 102, 0.48) 0 24%, transparent 26%);
  filter: blur(1px);
  opacity: 0.85;
  animation: drift 7s ease-in-out infinite alternate;
}

.landing-page .wave {
  bottom: -7.5rem;
  height: 15rem;
  opacity: 0.58;
  filter: blur(8px);
}

.wave-two {
  bottom: -7rem;
  opacity: 0.5;
  transform: scaleX(1.2);
  animation-duration: 10s;
}

.landing-page .wave-two {
  bottom: -9rem;
  opacity: 0.34;
}

.sway-grass {
  position: absolute;
  bottom: -1rem;
  z-index: -1;
  width: clamp(7rem, 18vw, 13rem);
  height: clamp(12rem, 30vw, 21rem);
  background:
    radial-gradient(ellipse at 24% 84%, rgba(255, 111, 97, 0.62) 0 12%, transparent 13%),
    radial-gradient(ellipse at 74% 82%, rgba(255, 182, 185, 0.5) 0 10%, transparent 11%),
    linear-gradient(82deg, transparent 39%, rgba(141, 240, 220, 0.72) 40% 44%, transparent 45%),
    linear-gradient(96deg, transparent 49%, rgba(30, 202, 211, 0.62) 50% 54%, transparent 55%),
    linear-gradient(72deg, transparent 59%, rgba(141, 240, 220, 0.54) 60% 64%, transparent 65%);
  filter: blur(0.2px);
  opacity: 0.76;
  transform-origin: bottom center;
}

.grass-left {
  left: clamp(0.75rem, 3vw, 2rem);
}

.grass-right {
  right: clamp(0.75rem, 3vw, 2rem);
  transform: scaleX(-1);
}

.shipwreck-art {
  position: absolute;
  right: max(-1rem, 2vw);
  bottom: clamp(6.5rem, 16vh, 11rem);
  z-index: -2;
  width: min(48rem, 92vw);
  max-height: 42vh;
  opacity: 0.84;
  transform: rotate(-5deg);
  transform-origin: 62% 80%;
}

.shipwreck-art svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.wreck-shadow {
  fill: rgba(1, 20, 31, 0.58);
}

.wreck-body,
.wreck-mast,
.wreck-coral {
  filter: drop-shadow(0 1.2rem 1.5rem rgba(1, 20, 31, 0.42));
}

.reef {
  position: absolute;
  bottom: -1rem;
  z-index: -1;
  width: clamp(7rem, 22vw, 16rem);
  height: clamp(11rem, 30vw, 20rem);
  opacity: 0.75;
}

.reef-left {
  left: 2vw;
  background:
    radial-gradient(ellipse at 42% 78%, var(--coral) 0 17%, transparent 18%),
    radial-gradient(ellipse at 58% 58%, var(--lavender) 0 12%, transparent 13%),
    radial-gradient(ellipse at 34% 42%, var(--seafoam) 0 10%, transparent 11%);
}

.reef-right {
  right: 2vw;
  background:
    radial-gradient(ellipse at 54% 78%, var(--shell-pink) 0 17%, transparent 18%),
    radial-gradient(ellipse at 36% 56%, var(--gold) 0 12%, transparent 13%),
    radial-gradient(ellipse at 62% 38%, var(--aqua) 0 10%, transparent 11%);
}

@keyframes bubble {
  from {
    opacity: 0;
    transform: translate3d(0, 0, 0) scale(0.82);
  }

  12% {
    opacity: 0.85;
  }

  to {
    opacity: 0;
    transform: translate3d(2rem, -115vh, 0) scale(1.12);
  }
}

@keyframes rays {
  from {
    transform: translateX(-2rem) rotate(-2deg);
  }

  to {
    transform: translateX(2rem) rotate(2deg);
  }
}

@keyframes float-shell {
  from,
  to {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-0.8rem);
  }
}

@keyframes drift {
  from {
    transform: translateX(-1.5rem);
  }

  to {
    transform: translateX(1.5rem);
  }
}

@keyframes snow-drift {
  from {
    transform: translate3d(-0.4rem, -0.2rem, 0);
  }

  to {
    transform: translate3d(1.4rem, 1.1rem, 0);
  }
}

@media (max-width: 720px) {
  .ocean-scene {
    padding: 1rem;
  }

  .hero-shell,
  .message-panel {
    border-radius: 1.35rem 1.35rem 2.4rem 2.4rem;
    padding: 2rem 1.25rem;
  }

  .music-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .volume-control {
    justify-content: space-between;
  }

  .volume-control input {
    width: 55vw;
  }

  .sway-grass {
    opacity: 0.45;
  }

  .shipwreck-page .message-panel {
    margin-bottom: 7.5rem;
    padding: 1.65rem 1rem;
  }

  .shipwreck-art {
    right: -8rem;
    bottom: 11.5rem;
    width: 42rem;
    opacity: 0.5;
  }

  .mom-list {
    gap: 0.55rem;
  }

  .mom-list label {
    grid-template-columns: 1rem minmax(0, 1fr);
    gap: 0.55rem;
  }

  .mom-list span {
    width: 0.85rem;
    height: 0.85rem;
  }

  .mom-list input {
    min-height: 2.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}