/* eclipse.css */
body {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  background-color: #0b0f2f;
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
}
/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background-color: #070b23;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  padding: 0 20px;
  box-sizing: border-box;
}

/* Logo (left) */
.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #0ff;
}

.logo a {
  color: #0ff;
  text-decoration: none;
}

/* Center nav links */
.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  align-items: center;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 7px;
}

.nav-links a {
  color: whitesmoke;
  text-decoration: none;
  font-size: 17px;
}

.nav-links a:hover {
  color: #0ff;
}

/* Right actions: login, signup, profile */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.signup-btn {
  background-color: #0ff;
  color: #000;
  padding: 6px 12px;
  border-radius: 5px;
  font-weight: bold;
  transition: 0.3s;
}

.nav-actions-links {
  color: whitesmoke;
  font-size: 17px;
}

.nav-actions a {
  text-decoration: none;
  white-space: nowrap;
}

.nav-actions a:hover {
  color: #0ff;
}

.signup-btn:hover {
  background-color: #00c9c9;
}

.hamburger {
  display: none; /* hide by default */
}

@media (max-width: 800px) {
  .hamburger {
    display: block;
    font-size: 28px;
    cursor: pointer;
    color: #0ff;
    z-index: 1001;
  }

  .mobile-nav {
    display: none;
    flex-direction: column;
    background-color: #070b23;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;

  }

  .mobile-nav.active {
    display: flex;
  }

  .mobile-nav .nav-links,
  .mobile-nav .nav-actions {
    display: flex !important; /* force show in mobile dropdown */
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
  }

  
  /* Force vertical layout */
  .nav-links,
  .nav-actions {
    position: static;      /* remove absolute from desktop */
    transform: none;       /* remove translateX from desktop */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
    margin: 0;
    padding: 0;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a,
  .nav-actions a {
    display: block;
    width: 100%;
    padding: 10px 0;
    color: white;
    text-align: center;
  }

  /* Smaller signup button in mobile */
  .nav-actions .signup-btn {
    width: auto;
    min-width: 120px;
    max-width: 160px;
  }

  .mobile-nav a {
    color: white;
    padding: 0.75rem;
    text-align: center;
  }
}

#sim-container {
  max-width: 900px;
  padding: 20px;
  text-align: center;
  padding-top: 55px;
}

h1 {
  color: #f7c948;
  font-size: 2rem;
  margin-bottom: 10px;
}

#instruction-box {
  background: rgba(255, 255, 255, 0.1);
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 20px;
  text-align: left;
}

#space {
  position: relative;
  width: 500px;
  height: 500px;
  margin: 0 auto;
  background: radial-gradient(ellipse at center, #111933 0%, #000000 100%);
  border-radius: 50%;
  overflow: hidden;
}

#sun {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60px;
  height: 60px;
  margin: -30px;
  background: radial-gradient(circle, #ffcc00, #ff8800);
  border-radius: 50%;
  box-shadow: 0 0 20px #ffaa00;
  z-index: 2;
}

#earth-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 300px;
  margin: -150px;
  border: 1px dashed #4455ff44;
  border-radius: 50%;
  animation: rotateEarthOrbit 20s linear infinite;
}

#earth {
  position: absolute;
  top: 0;
  left: 50%;
  width: 30px;
  height: 30px;
  margin-left: -15px;
  background: #3f92ff;
  border-radius: 50%;
  box-shadow: 0 0 10px #3f92ff;
}

#moon-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80px;
  height: 80px;
  margin: -40px;
  border: 1px dotted #aaa6;
  border-radius: 50%;
  animation: rotateMoonOrbit 5s linear infinite;
}

#moon {
  position: absolute;
  top: 0;
  left: 50%;
  width: 15px;
  height: 15px;
  margin-left: -7.5px;
  background: #bbb;
  border-radius: 50%;
  box-shadow: 0 0 8px #999;
}

#controls {
  margin-top: 20px;
}

button {
  background-color: #222;
  color: #f7c948;
  border: 1px solid #f7c948;
  padding: 10px 20px;
  margin: 0 5px;
  font-size: 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background-color: #333;
  transform: scale(1.05);
}

/* Orbit Animations */
@keyframes rotateEarthOrbit {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes rotateMoonOrbit {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.label {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 5px;
  font-size: 0.8rem;
  color: #fff;
  background-color: rgba(0,0,0,0.5);
  padding: 2px 6px;
  border-radius: 6px;
  pointer-events: none;
}

#shadow-umbra, #shadow-penumbra {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

#shadow-umbra {
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, rgba(0,0,0,0.6) 0%, transparent 70%);
  display: none;
}

#shadow-penumbra {
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(0,0,0,0.3) 0%, transparent 70%);
  display: none;
}

#message-box {
  margin-top: 15px;
  background-color: rgba(255, 255, 255, 0.07);
  padding: 10px 15px;
  font-size: 1rem;
  border-radius: 8px;
  color: #f7f7f7;
  width: 80%;
}


#earth, #moon {
  position: absolute;
}

#earth-orbit, #moon-orbit {
  border: none;
  animation: none;
}

#earth-orbit, #moon-orbit {
  position: absolute;
  top: 0;
  left: 0;
}

#moon {
  z-index: 5;
}

#earth {
  z-index: 4;
}

#sun {
  z-index: 3;
}

#shadow-umbra,
#shadow-penumbra {
  z-index: 2;
}

#space {
  position: relative;
  background-color: #070b2d;
  border: 2px solid #1a1a2e;
  border-radius: 50%;
  width: 500px;
  height: 500px;
  margin: auto;
}

.guideline {
  position: absolute;
  width: 2px;
  background-color: rgba(255, 255, 255, 0.3);
  transform-origin: top left;
  z-index: 1;
}

/* ***************************************** */
.complete-btn {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00c6ff, #0072ff);
  color: white;
  font-size: 16px;
  font-weight: bold;
  border: none;
  border-radius: 50px;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  transition: all 0.3s ease;
  z-index: 1000;
}
.complete-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}

.btn-icon {
  font-size: 20px;
}

.btn-text {
  white-space: nowrap;
}