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

:root{
  --text-color: white;
  --bg-url: url(./assets/bg-mobile.jpg);
  --stroke-color: rgba(255, 255, 255, 0.50);
  --surface-color: rgba(255, 255, 255, 0.10);
  --surface-color-hover: rgba(255, 255, 255, 0.05);
  --highlight-color: rgba(255, 255, 255, 0.20);
  --switch-bg-url: url(./assets/moon-stars.svg);
}

.light{
  --text-color: black;
  --bg-url: url(./assets/bg-mobile-light.jpg);
  --stroke-color: rgba(0, 0, 0, 0.50);
  --surface-color: rgba(0, 0, 0, 0.05);
  --surface-color-hover: rgba(0, 0, 0, 0.02);
  --highlight-color: rgba(0, 0, 0, 0.10);
  --switch-bg-url: url(./assets/sun.svg);
}
body{
  /* background: color image repeat position/size*/
  background: var(--bg-url)  no-repeat top center/cover;
  height: 100vh;
}

body *{
  font-family: 'Inter', sans-serif;
  color: var(--text-color);
}

#container{
  width: 100%;
  max-width: 588px;
  margin: 56px auto 0px;
  padding: 0 24px;
}

/* profile */
#profile{
  text-align: center;
  padding: 24px;
}

#profile img{
  width: 112px;
}

#profile p{
  font-weight: 400;
  line-height: 24px; 
  margin-top: 8px;
}

/* switch */

#switch{
  position: relative;
  width: 64px;

  margin: 4px auto;
}

#switch button{
  width: 32px;
  height: 32px;
  background: white var(--switch-bg-url) no-repeat center;
  border: 0;
  border-radius: 50%;

  position: absolute;
  left: 0;
  z-index: 1;
  top: 50%;
  transform: translateY(-50%);

  animation: slide-back 0.2s;
}

.light #switch button {
  animation: slide-in 0.4s forwards;
}

#switch button:hover{
  outline: 8px solid var(--highlight-color);
}

#switch span{
  display: block;
  width: 64px;
  height: 24px;
  background: var(--surface-color);
  border: 1px solid var(--stroke-color);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 9999px;
}
/* links */

ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px 0;
}

ul li a{
  display: flex;
  align-items: center;
  justify-content: center;
  
  background: var(--surface-color);
  border: 1px solid var(--stroke-color);
  border-radius: 8px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: 16px 24px;

  text-decoration: none;
  font-weight: 500;

  transition: background 0.2s;
}

ul li a:hover{
  background: var(--surface-color-hover);
  border: 1.5px solid var(--text-color);
}

/* social links */
#social-links{
  display: flex;
  padding: 24px 0;
  font-size: 24px;
  justify-content: center;
}

#social-links a{
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;

  transition: background 0.2s;
  border-radius: 50%;
}

#social-links a:hover{
  background: var(--highlight-color);
  border-radius: 50%;
}

footer{
  padding: 24px 0;
  text-align: center;
  font-size: 14px;
}

/* media queries */
@media (min-width: 700px){
  :root{
    --bg-url: url(./assets/bg-desktop.jpg);
  }

  .light{
    --bg-url: url(./assets/bg-desktop-light.jpg);
  }
}

/* animation */
@keyframes slide-in{
  from {
    left: 0;
  }
  to {
    left: 50%;
  }
}

@keyframes slide-back {
  from {
    left: 50%;
  }
  to {
    left: 0;
  }
}