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

:root {
  --color-bg: #072a30;
  --color-col1: #181880;
  --color-col2: #02545d;
  --color-col3: #231033;
  --color-col4: #4c2448;
  --color-col1-tint: #1e1ea0;
  --color-col2-tint: #025f68;
  --color-col3-tint: #2c1440;
  --color-col4-tint: #663060;
}

body {
  width: 100%;
  height: 100vh;
  color: #fff;
  font-family: sans-serif;
  text-align: center;
  font-size: 62.5%;
  background-color: var(--color-bg);
  line-height: 1.5;
}

h1 {
  margin-top: 1.2rem;
  font-size: 2rem;
}

h2 {
  font-size: 1.6rem;
  margin-bottom: 0.4rem;
}

.column-container {
  margin: 1.2rem 0;
  display: flex;
  justify-content: center;
  gap: 2.4rem;
  flex-wrap: wrap;
  font-size: 1.2rem;
  padding: 0 1rem;
}

.column-1,
.column-2,
.column-3,
.column-4 {
  width: 22rem;
  box-shadow: 0px 0px 10px 0px #000;
  border-radius: 0.5rem;
  padding: 1.25rem;
  background-color: var(--color-col1);
}

.column-1 p,
.column-2 p,
.column-3 p,
.column-4 p {
  padding-bottom: 1.25rem;
}

.column-2 {
  background-color: var(--color-col2);
}

.column-3 {
  background-color: var(--color-col3);
}

.column-4 {
  background-color: var(--color-col4);
}

.hidden {
  display: none;
}

.default-btn {
  width: 100%;
  color: #999;
  font-size: 20px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.5s;
  background-color: rgba(32, 116, 155, 0);
  padding: 10px;
  margin: 5px 0;
  border-radius: 10px;
  border: 1px solid #999;
}

.default-btn img {
  height: 16px;
}

.default-btn:hover,
.login-btn:hover,
.logout-btn:hover {
  color: #fff;
  border-color: #fff;
}

button:active {
  transform: translate(1px, 1px);
}

.column-1:hover,
.column-2:hover,
.column-3:hover,
.column-4:hover {
  transition: all 0.5s;
  backdrop-filter: blur(20px);
  background-color: var(--color-col1-tint);
}

.column-2:hover {
  background-color: var(--color-col2-tint);
}

.column-3:hover {
  background-color: var(--color-col3-tint);
}

.column-4:hover {
  background-color: var(--color-col4-tint);
}

.overlay {
  position: fixed;
  background-color: rgba(0, 0, 0, 0.758);
  transition: all 0.2s;
  backdrop-filter: blur(30px);
  z-index: 2;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
}

.author {
  text-decoration: none;
  color: #fff;
}

.secret-btn {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 24px;
  z-index: 1000;
  opacity: 0;
}

.secret-btn:checked {
  opacity: 1;
}

.donation {
  position: fixed;
  bottom: 10px;
  right: 10px;
  z-index: 1000;
  background-color: var(--color-bg);

  opacity: 0.7;
  transition: opacity 0.3s;
}

.donation:hover {
  opacity: 1;
}

ion-icon {
  color: #fff;
}

footer {
  position: relative;
  font-size: 0.8rem;
  padding-bottom: 4rem;
}

@media (max-width: 420px) {
  .date-display {
    font-size: 1.4rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.4rem;
  }
}