:root {
  --main-color: #ff0000;
  --wrapper-gap-row: 1.5vh;
  --wrapper-gap-column: 10vh;
  --option-width: 17vh;
  --option-height: 3.5vh;
  --option-padding: 0.5rem;
  --option-font-size: 12px;
  --icon-font-size: 11px;
  --icon-margin-right: 6px;
}

html, body {
  height: 100%;
}

body {
  font-family: sans-serif;
  font-weight: normal;
  visibility: hidden;
  user-select: none;
  white-space: nowrap;
  margin: 0;
  overflow: hidden;
  color: #fff;
  background: transparent;
  position: relative;
}

* {
  margin: 0;
  padding: 0;
  outline: 0;
  position: relative;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

p {
  margin: 0;
}

#eye {
  text-align: center;
  width: 5px;
  height: 5px;
  border: 1px solid var(--main-color);
  border-radius: 100%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.2s ease-in-out;
  z-index: 200;
  background-color: var(--main-color);
}

#eye.active i {
  width: 10px;
  height: 10px;
  top: 50%;
}

#eye i {
  visibility: hidden;
}

#options-wrapper {
  position: absolute;
  bottom: calc(50% + 4.3vh);
  left: 50%;
  transform: translate(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--wrapper-gap-row);
  z-index: 1;
  width: max-content;
  padding: 16px 0;
}

.option-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--wrapper-gap-column);
}

.centered-row {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: var(--wrapper-gap-row) 0;
}

#options-wrapper li {
  list-style: none;
  width: var(--option-width);
  height: var(--option-height);
  transition: all 0.3s ease;
}

#options-wrapper li a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: var(--option-padding);
  color: #fff;
  background: linear-gradient(135deg, #570000bd, #ff00009a);
  border-radius: 4px;
  font-size: var(--option-font-size);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  position: relative;
  z-index: 1;
  transition: all 0.2s ease;
}

#options-wrapper li a:hover {
  transform: scale(1.03);
  box-shadow: 0 3px 8px rgba(218, 0, 0, 0.3);
}

#options-wrapper li a::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 200%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  z-index: -1;
  transition: all 0.4s ease;
}

#options-wrapper li a:hover::before {
  left: 100%;
}

.option-icon {
  font-size: var(--icon-font-size);
  margin-right: var(--icon-margin-right);
  transition: all 0.3s ease;
}

@media (max-width: 640px) {
  .option-row {
    flex-direction: column;
    gap: 2vh;
  }

  #options-wrapper li {
    width: 100%;
  }

  .centered-row {
    margin: 2vh 0;
  }
}

.vertical-line {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 5.5vh;
  background-color: var(--main-color);
}

.vertical-line.line-0 { bottom: calc(50%); }
.vertical-line.line-1 { bottom: calc(50% + 5.5vh); }
.vertical-line.line-2 { bottom: calc(50% + 10.5vh); }
.vertical-line.line-3 { bottom: calc(50% + 15.5vh); }
.vertical-line.line-4 { bottom: calc(50% + 20.5vh); }
.vertical-line.line-5 { bottom: calc(50% + 25.5vh); }

.line-dot.dot-0 { bottom: calc(50% + 0.5vh + 5vh); }
.line-dot.dot-1 { bottom: calc(50% + 5.5vh + 5vh); }
.line-dot.dot-2 { bottom: calc(50% + 10.5vh + 5vh); }
.line-dot.dot-3 { bottom: calc(50% + 15.5vh + 5vh); }
.line-dot.dot-4 { bottom: calc(50% + 20.5vh + 5vh); }
.line-dot.dot-5 { bottom: calc(50% + 25.5vh + 5vh); }

.line-dot {
  position: absolute;
  width: 8px;
  height: 8px;
  background-color: var(--main-color);
  border-radius: 50%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.branch-pair {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: max-content;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 1;
}

.branch-pair.pair-1 { bottom: calc(50% + 5.5vh); }
.branch-pair.pair-2 { bottom: calc(50% + 10.5vh); }
.branch-pair.pair-3 { bottom: calc(50% + 15.5vh); }
.branch-pair.pair-4 { bottom: calc(50% + 20.5vh); }
.branch-pair.pair-5 { bottom: calc(50% + 25.5vh); }

.branch-left,
.branch-right {
  width: 5vh;
  height: 2.2vh;
  border-top: 2px solid var(--main-color);
  position: relative;
}

.branch-left {
  border-right: 2px solid var(--main-color);
  border-top-right-radius: 3vh;
  margin-right: -1px;
}

.branch-right {
  border-left: 2px solid var(--main-color);
  border-top-left-radius: 3vh;
  margin-left: -1px;
}

.branch-left::before,
.branch-right::before {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  background-color: var(--main-color);
  border-radius: 50%;
  top: -5px;
}

.branch-left::before  { left: -6px; }
.branch-right::before { right: -6px; }

.hidden {
  display: none !important;
}