:root {
  --Fcolor: #17483b;
  --Bcolor: #f6f2ea;
  --GridColor: rgba(39, 76, 65, 0.16);
  --LineColor: rgba(39, 76, 65, 0.24);
  --AvatarFrame: #e8e2d7;
  --AvatarFrameBorder: rgba(39, 76, 65, 0.2);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

html {
  min-height: 100%;
  background: var(--Bcolor);
}

body {
  position: relative;
  width: 100%;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background-color: var(--Bcolor);
  background-image:
    radial-gradient(circle at 18% 82%, rgba(193, 157, 88, 0.78) 0 3px, transparent 4px),
    radial-gradient(circle at 80% 23%, rgba(193, 157, 88, 0.78) 0 3px, transparent 4px),
    linear-gradient(to right, var(--GridColor) 1px, transparent 1px),
    linear-gradient(to bottom, var(--GridColor) 1px, transparent 1px);
  background-position: 0 0, 0 0, 0 0, 0 0;
  background-size: auto, auto, 48px 48px, 48px 48px;
  color: var(--Fcolor);
}

body::before,
body::after {
  position: fixed;
  z-index: 0;
  display: block;
  border: 1px solid var(--LineColor);
  border-radius: 50%;
  content: "";
  pointer-events: none;
  transform-origin: center;
  will-change: transform;
}

body::before {
  top: 18vh;
  left: -14vw;
  width: 126vw;
  height: 60vh;
  transform: rotate(-15deg);
  animation: ambient-orbit-a 31s ease-in-out -8s infinite alternate;
}

body::after {
  top: 39vh;
  left: 27vw;
  width: 112vw;
  height: 44vh;
  transform: rotate(23deg);
  animation: ambient-orbit-b 37s ease-in-out -17s infinite alternate;
}

.title {
  position: relative;
  z-index: 1;
  margin-top: 20%;
  font-size: 56px;
  font-family: Monaco;
}

.title::before,
.title::after {
  position: absolute;
  z-index: -1;
  display: block;
  border: 1px solid var(--LineColor);
  border-radius: 50%;
  content: "";
  pointer-events: none;
  transform-origin: center;
  will-change: transform;
}

.title::before {
  top: -8rem;
  left: 50%;
  width: min(48rem, 88vw);
  height: 19rem;
  transform: translateX(-50%) rotate(-10deg);
  animation: avatar-orbit-a 19s ease-in-out -5s infinite alternate;
}

.title::after {
  top: -5rem;
  left: 50%;
  width: min(33rem, 72vw);
  height: 15rem;
  transform: translateX(-50%) rotate(19deg);
  animation: avatar-orbit-b 23s ease-in-out -11s infinite alternate;
}

@keyframes ambient-orbit-a {
  0% {
    transform: translate3d(-1.5vw, -1vh, 0) rotate(-15deg) scale(1, 1);
  }

  23% {
    transform: translate3d(2vw, 2vh, 0) rotate(-11deg) scale(1.015, 0.97);
  }

  51% {
    transform: translate3d(-2vw, 1vh, 0) rotate(-18deg) scale(0.98, 1.03);
  }

  78% {
    transform: translate3d(1vw, -2vh, 0) rotate(-13deg) scale(1.02, 0.98);
  }

  100% {
    transform: translate3d(-1vw, 1.5vh, 0) rotate(-16deg) scale(1, 1.02);
  }
}

@keyframes ambient-orbit-b {
  0% {
    transform: translate3d(1vw, 1vh, 0) rotate(23deg) scale(1, 1);
  }

  29% {
    transform: translate3d(-2vw, -1vh, 0) rotate(19deg) scale(0.98, 1.03);
  }

  54% {
    transform: translate3d(2vw, 2vh, 0) rotate(26deg) scale(1.025, 0.97);
  }

  81% {
    transform: translate3d(-1vw, 0, 0) rotate(21deg) scale(0.99, 1.02);
  }

  100% {
    transform: translate3d(1.5vw, -1.5vh, 0) rotate(24deg) scale(1.01, 0.98);
  }
}

@keyframes avatar-orbit-a {
  0% {
    transform: translate(-50%, -1%) rotate(-10deg) scale(1, 1);
  }

  22% {
    transform: translate(-46%, 3%) rotate(-7deg) scale(1.03, 0.95);
  }

  47% {
    transform: translate(-53%, -4%) rotate(-13deg) scale(0.97, 1.04);
  }

  73% {
    transform: translate(-49%, 5%) rotate(-9deg) scale(1.02, 0.98);
  }

  100% {
    transform: translate(-55%, 0) rotate(-15deg) scale(0.99, 1.02);
  }
}

@keyframes avatar-orbit-b {
  0% {
    transform: translate(-50%, 1%) rotate(19deg) scale(1, 1);
  }

  31% {
    transform: translate(-54%, -3%) rotate(24deg) scale(0.96, 1.04);
  }

  58% {
    transform: translate(-47%, 4%) rotate(16deg) scale(1.04, 0.96);
  }

  84% {
    transform: translate(-51%, -2%) rotate(21deg) scale(0.98, 1.02);
  }

  100% {
    transform: translate(-45%, 2%) rotate(17deg) scale(1.01, 0.99);
  }
}

.title a {
  color: var(--Fcolor);
  text-decoration: none;
}

.title-hidden {
  visibility: hidden;
}

.title-hidden::before,
.title-hidden::after {
  visibility: visible;
}

.avatar-wrap {
  position: absolute;
  top: clamp(11rem, calc(20vw + 2.5rem), 28rem);
  left: 50%;
  z-index: 3;
  width: clamp(7rem, 9vw, 10rem);
  aspect-ratio: 1;
  pointer-events: none;
  transform: translate(-50%, -50%);
}

.avatar-disc {
  position: relative;
  width: 100%;
  height: 100%;
  padding: 0.34rem;
  box-sizing: border-box;
  overflow: hidden;
  border: 1px solid var(--AvatarFrameBorder);
  border-radius: 50%;
  background: var(--AvatarFrame);
  box-shadow: 0 4px 14px rgba(23, 72, 59, 0.1);
  pointer-events: auto;
  cursor: pointer;
  transition: transform 0.8s ease;
  will-change: transform;
}

.avatar-disc:hover {
  transform: scale(1.15) rotate(360deg);
}

.avatar-disc img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: contain;
}

.flex {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

.flex a {
  margin: 16px;
}

.button {
  position: relative;
  display: inline-block;
  overflow: hidden;
  padding: 0.4em 0.8em;
  color: var(--Fcolor);
  border: 2px solid var(--Fcolor);
  border-radius: 0.3em;
  font-size: 20px;
  text-align: center;
  text-decoration: none;
  transition: all 0.2s ease-in-out;
}

.button::before {
  position: absolute;
  top: 0;
  left: -4.5em;
  display: block;
  width: 3em;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.5);
  content: "";
  transform: skewX(-45deg) translateX(0);
  transition: none;
}

.button:hover {
  color: var(--Bcolor);
  background-color: var(--Fcolor);
  border-bottom: 4px solid rgba(23, 72, 59, 0.78);
}

.button:hover::before {
  transform: skewX(-45deg) translateX(13.5em);
  transition: all 0.5s ease-in-out;
}

.button:focus-visible,
.title a:focus-visible,
.footer a:focus-visible {
  outline: 3px solid var(--Fcolor);
  outline-offset: 4px;
}

.footer {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  margin: 20px auto;
  color: var(--Fcolor);
  font-size: small;
  text-align: center;
}

.footer a {
  color: var(--Fcolor);
  text-decoration: none;
}

@media (max-width: 560px) {
  .title {
    margin-top: 28vh;
    font-size: 42px;
  }

  .avatar-wrap {
    top: calc(28vh + 1.75rem);
    width: 6.75rem;
  }

  #buttonList {
    flex-direction: column;
  }

  #buttonList a {
    margin: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation: none !important;
  }

  .avatar-disc:hover {
    transform: none;
  }

}