:root {
  --clr-dark: #111;
  --clr-light: #eee;
  --clr-light_dimmed: #aaa;
  --clr-transparent: rgba(0, 0, 0, 0);

  --clr-accent: hsl(0, 66%, 75%);
  --clr-accent_dimmed: hsl(0, 66%, 65%);

  --clr-bg-dark: #333;

  --clr-light-o10: rgba(255, 255, 255, 0.1);
  --clr-light-o20: rgba(255, 255, 255, 0.2);
  --clr-light-o30: rgba(255, 255, 255, 0.3);
  --clr-light-o40: rgba(255, 255, 255, 0.4);
  --clr-light-o50: rgba(255, 255, 255, 0.5);
  --clr-light-o60: rgba(255, 255, 255, 0.6);
  --clr-light-o70: rgba(255, 255, 255, 0.7);
  --clr-light-o80: rgba(255, 255, 255, 0.8);
  --clr-light-o90: rgba(255, 255, 255, 0.9);

  --clr-dark-o10: rgba(0, 0, 0, 0.1);
  --clr-dark-o20: rgba(0, 0, 0, 0.2);
  --clr-dark-o30: rgba(0, 0, 0, 0.3);
  --clr-dark-o40: rgba(0, 0, 0, 0.4);
  --clr-dark-o50: rgba(0, 0, 0, 0.5);
  --clr-dark-o60: rgba(0, 0, 0, 0.6);
  --clr-dark-o70: rgba(0, 0, 0, 0.7);
  --clr-dark-o80: rgba(0, 0, 0, 0.8);
  --clr-dark-o90: rgba(0, 0, 0, 0.9);

  font-size: 110%;
}

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

  line-height: 1.6;

  /* outline: 1px solid yellow; */
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--clr-light);
  /* background: var(--clr-dark); */
  background-color: var(--clr-bg-dark);
  overflow-y: scroll;
  box-shadow: 0 0 4rem 4rem var(--clr-dark-o10) inset;
}

p {
  margin-top: 0.8rem;
  margin-bottom: 0.8rem;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

a {
  text-decoration: none;
  color: var(--clr-light);
  border-bottom: 1px solid var(--clr-transparent);
  transition: border 0.2s ease; 
}

a:hover {
  color: var(--clr-light_dimmed);
  outline: none;
  border-bottom: 1px solid var(--clr-light_dimmed);
  transition: border 0.5s ease;
}

a:focus {
  color: var(--clr-light_dimmed);
  outline: none;
  border-bottom: 1px solid var(--clr-light_dimmed);
  transition: border 0.5s ease;
}

.selected {
  color: var(--clr-light_dimmed);
}

hr {
  opacity: 0;
}

.hr {
  width: 100%;
  height: 1px;
  background-color: var(--clr-light);
  opacity: 50%;
}

.page-wrapper {
  min-height: 100vh;

  display: flex;
  flex-direction: column;
}

footer {
  margin-top: auto;
}

.title-box {
  position: relative;
  height: 14rem;
}

.title-box_full {
  height: 100%;
}

.title-box-bg {
  height: 100%;
  width: 100%;
  position: absolute;
  top: 50%;
  left: 50%;

  transform: translate(-50%, -50%);
  background-color: var(--clr-dark);
}

.title-box-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  text-shadow: 0 0 1rem var(--clr-dark);
}

.content-wrapper {
  margin-top: 4rem;
  margin-bottom: 4rem;
}