* {
  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, 0.5);
  --surface-color: rgba(99, 99, 99, 0.5);
  --surface-color-hover: rgba(0, 0, 0, 0.02);
  --highlight-color: rgba(99, 99, 99, 0.2);
  --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, 0.5);
  --surface-color: rgba(0, 0, 0, 0.05);
  --surface-color-hover: rgba(0, 0, 0, 0.02);
  --highlight-color: rgba(0, 0, 0, 0.1);
  --switch-bg-url: url(./ASSETS/sun.svg);
}

body {
  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: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid rgba(99, 99, 99, 0.5);
}

#profile p {
  font-weight: 500;
  line-height: 24px;
  margin-top: 24px;
}

/* 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;
  top: 50%;
  left: 0;
  z-index: 1;

  transform: translateY(-50%);

  animation: slide-back 0.4s;

  transition: box-shadow 0.18s ease, transform 0.12s ease;
}

#switch button:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  transform: translateY(calc(-50% - 1px));
}

.light #switch button {
  animation: slide-in 0.4s forwards;
  outline: none;
}

#switch button:focus-visible {
  outline: 4px solid rgba(99, 99, 99, 0.25);
  outline-offset: 4px;
}

#switch span {
  display: block;
  width: 64px;
  height: 24px;
  background: var(--surface-color);
  border: 1px solid var(--stroke-color);
  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;

  padding: 16px 24px;

  background: var(--surface-color);
  border: 1px solid var(--stroke-color);
  border-radius: 8px;

  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);

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

  transition: background 0.2s;
}

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

/* SOCIAL LINKS */
#social-links {
  display: flex;
  justify-content: center;
  padding: 24px 0;
  font-size: 40px;
}

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

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

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

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

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

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

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

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