* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  background: #02030a;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
}

/*-----------------------------------
    STARFIELD
------------------------------------*/

#starfield {
  position: fixed;
  inset: 0;
  overflow: hidden;
  
  background:
    radial-gradient(circle at center, #10152c 0%, #050713 45%, #02030a 100%);
  
  z-index: 0;
}

.star {
  position: absolute;
  width: 2px;
  height: 2px;
  background: white;
  border-radius: 50%;
  animation: twinkle infinite ease-in-out;
}

@keyframes twinkle {
  0%,
  100% {
    opacity: 0.2;
  }

  50% {
    opacity: 1;
  }
}

/*-----------------------------------
    LANDING SCREEN
------------------------------------*/

#home {
  width: 100%;
  height: 100vh;

  display: flex;
  align-items: center;
  justify-content: center;

  text-align: center;

  position: relative;
  z-index: 1;
}

.title-container {
  transition: opacity 1s ease, transform 1s ease;
}

.studio-name {
  font-size: 0.9rem;
  letter-spacing: 0.35rem;
  margin-bottom: 1.5rem;
  opacity: 0.75;
}

h1 {
  font-size: clamp(4rem, 12vw, 9rem);
  letter-spacing: 1rem;
  margin-right: -1rem;
}

.subtitle {
  font-size: 1rem;
  letter-spacing: 0.2rem;
  opacity: 0.7;
  margin-top: 1rem;
}

/*-----------------------------------
    ENTER BUTTON
------------------------------------*/

#enter-button {
  margin-top: 3rem;

  padding: 0.9rem 3rem;

  background: transparent;
  color: white;

  border: 1px solid rgba(255, 255, 255, 0.6);

  font-size: 0.85rem;
  letter-spacing: 0.3rem;

  cursor: pointer;

  transition:
    background 0.3s ease,
    color 0.3s ease,
    transform 0.3s ease;
}

#enter-button:hover {
  background: white;
  color:black;
  transform: scale(1.05);
}

/*-----------------------------------
    MENU BUTTON
------------------------------------*/

#menu-button {
  position: fixed;

  top: 2rem;
  right: 2rem;

  width: 45px;
  height: 45px;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;

  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.35);

  cursor: pointer;

  z-index: 10;

  transition: background 0.3s ease;
}

#menu-button:hover {
  background: rgba(255, 255, 255, 0.15);
}

#menu-button span {
  width: 20px;
  height: 1px;
  background: white;
}

/*-----------------------------------
    SIDE MENU
------------------------------------*/

#side-menu {
  position: fixed;

  top: 0;
  right: 0;

  width: min(360px, 85vw);
  height: 100vh;

  padding: 5rem 3rem;

  background: rgba(5, 7, 18, 0.97);

  border-left: 1px solid rgba(255, 255, 255, 0.15);

  transform: translateX(100%);

  transition: transform 0.45s ease;

  z-index: 20;
}

#side-menu.open {
  transform: translateX(0);
}

#close-menu {
  position: absolute;

  top: 1.5rem;
  right: 2rem;

  background: none;
  border: none;

  color: white;

  font-size: 2rem;

  curser: pointer;
}

#side-menu h2 {
  font-size: 1.4rem;
  letter-spacing: 0.2rem;
  text-transform: uppercase;

  margin-bottom: 2rem;
}

#side-menu h3 {
  font-size: 0.8rem;
  letter-spacing: 0.2rem;
  text-transform: uppercase;

  opacity: 0.6;

  margin-bottom: 1rem;
}

#side-menu nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#side-menu a {
  color: white;
  text-decoration: none;

  font-size: 1rem;

  opacity: 0.75;

  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

#side-menu a:hover {
  opacity: 1;
  transform: translateX(5px);

  background: rgba(255, 255, 255, 0.15);

  margin: 3rem 0;
}

/*-----------------------------------
    MENU OVERLAY
------------------------------------*/

#menu-overlay {
  position: fixed;

  inset: 0;
  
  background: rgba(0, 0, 0, 0.5);

  opacity: 0;
  pointer-events: none;

  transition: opacity 0.45s ease;

  z-index: 15;
}

#menu-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/*-----------------------------------
    MOBILE
------------------------------------*/

@media (max-width: 600px) {

  .studio-name {
    font-size: 0.65rem;
    letter-spacing: 0.2rem;
  }

  h1 {
    font-size: 4rem;
    letter-spacing: 0.5rem;
  }

  #menu-button {
    top: 1rem;
    right: 1rem;
  }
}

/*-----------------------------------
    GALAXY FIELD
------------------------------------*/

#galaxy-field {
  position: fixed;
  inset: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  overflow: hidden;

  opacity: 0;
  pointer-events: none;

  transform: scale(1.15);

  transition:
    opacity 1.5s ease,
    transform 2s ease;

  z-index: 5;
}

#galaxy-field.active {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

.galaxy {
  position: absolute;

  width: 90px;
  height: 90px;

  border-radius: 50%;

  background:
    radial-gradient(
      circle,
      white 0%,
      rgba(255, 255, 255, 0.8) 5%,
      rgba(130, 150, 255, 0.5) 20%,
      rgba(80, 90, 180, 0.25) 45%,
      transparent 70%
      );

  box-shadow:
    0 0 30px rgba(150, 170, 255, 0.5),
    0 0 80px rgba(100, 120, 255, 0.25);

  cursor: pointer;

  transition:
    transform 0.4s ease,
    filter 0.4s ease;
}

.galaxy:hover {
  transform: scale(1.3);
  filter: brightness(1.4);
}

#kumo-galaxy {
  top: 25%;
  left: 30%;
}

#tus-galaxy {
  top: 60%;
  left: 65%;
}

#placeholder-galaxy {
  top: 35%;
  left: 75%;
}

/*-----------------------------------
    GALAXY LABELS
------------------------------------*/

.galaxy-label {
  position: absolute;

  left: 50%;
  top: 100%;

  margin-top: 12px;

  transform: translateX(-50%);

  color: white;
  font-size: 0.7rem;
  letter-spacing: 0.25rem;

  white-space: nowrap;

  opacity: 0;

  pointer-events: none;

  transition: opacity 0.3s ease;
}

.galaxy:hover .galaxy-label {
  opacity: 0.8;
}