:root {
  --ink: #1f3d36;
  --ink-soft: #3d5c54;
  --mist: #e7f5ef;
  --leaf: #7eb89f;
  --leaf-deep: #4f8f78;
  --sand: #fff8e8;
  --accent: #f0a35e;
  --accent-press: #e08c3f;
}

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

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

body {
  font-family: "Nunito", sans-serif;
  color: var(--ink);
  background: var(--mist);
  overflow-x: hidden;
}

.cover {
  position: relative;
  isolation: isolate;
  min-height: 100%;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 3.5vh, 2.25rem);
  padding: clamp(1.25rem, 4vw, 3rem);
  padding-bottom: calc(clamp(1.25rem, 4vw, 3rem) + 3.5rem);
  text-align: center;
}

.cover__atmosphere {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 90% 70% at 50% 18%, var(--sand) 0%, transparent 58%),
    radial-gradient(ellipse 70% 55% at 12% 88%, rgba(126, 184, 159, 0.55) 0%, transparent 55%),
    radial-gradient(ellipse 65% 50% at 92% 72%, rgba(240, 163, 94, 0.28) 0%, transparent 50%),
    linear-gradient(165deg, #d9efe6 0%, #eef7f2 48%, #e3f0ea 100%);
  animation: atmosphere-shift 14s ease-in-out infinite alternate;
}

.cover__atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  pointer-events: none;
  mix-blend-mode: soft-light;
}

.cover__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  animation: rise-in 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.cover__logo {
  width: min(36vw, 180px, 24vh);
  height: auto;
  display: block;
  animation: logo-float 3.6s ease-in-out infinite;
  transform-origin: center bottom;
}

.cover__title {
  font-family: "Fredoka", sans-serif;
  font-weight: 700;
  font-size: clamp(2.1rem, 7vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.cover__tagline {
  max-width: 22rem;
  font-size: clamp(1rem, 2.6vw, 1.15rem);
  font-weight: 500;
  color: var(--ink-soft);
  line-height: 1.4;
}

.cover__games {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  animation: rise-in 1s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

.game-btn {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  text-decoration: none;
  font-family: "Fredoka", sans-serif;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--accent);
  border: 3px solid var(--ink);
  transition: transform 0.2s ease, background-color 0.2s ease;
  animation: btn-breathe 2.8s ease-in-out infinite;
}

.game-btn:hover,
.game-btn:focus-visible {
  background: var(--accent-press);
  transform: scale(1.08);
  outline: none;
}

.game-btn:active {
  transform: scale(0.96);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.15rem;
  padding: 0.45rem 0.85rem;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: rgba(255, 248, 232, 0.72);
  color: var(--ink);
  font-family: "Nunito", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  animation: rise-in 1.05s cubic-bezier(0.22, 1, 0.36, 1) 0.28s both;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.share-btn__icon {
  width: 0.95rem;
  height: 0.95rem;
  flex: 0 0 auto;
}

.share-btn:hover,
.share-btn:focus-visible {
  background: var(--sand);
  transform: translateY(-1px);
  outline: none;
}

.share-btn:active {
  transform: translateY(0);
}

@keyframes logo-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes btn-breathe {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(31, 61, 54, 0);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(31, 61, 54, 0.08);
  }
}

@keyframes atmosphere-shift {
  from {
    filter: hue-rotate(0deg);
  }
  to {
    filter: hue-rotate(8deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .cover__logo,
  .cover__brand,
  .cover__games,
  .game-btn,
  .share-btn,
  .cover__atmosphere {
    animation: none;
  }
}