/* Common Variables */
:root {
  /* Light theme (default) */
  --bg-primary: #f8f9fa;
  --bg-secondary: #e9ecef;
  --bg-accent: #dee2e6;
  --text-primary: #212529;
  --text-secondary: #495057;
  --accent-blue: #6ba6ff;
  --accent-dark: #343a40;
  --accent-light: #6c757d;
  --accent-purple: #6f42c1;
  --accent-teal: #20c997;
  --accent-highlight: #0dcaf0;
  --accent-warm: #fd7e14;
  --accent-red: #c0392b;
  --card-shadow: rgba(0, 0, 0, 0.1);
  --star-color: rgba(255, 255, 255, 0.8);
}

/* Dark theme variables */
.dark-theme {
  --bg-primary: #212529;
  --bg-secondary: #343a40;
  --bg-accent: #495057;
  --text-primary: #f8f9fa;
  --text-secondary: #e9ecef;
  --card-shadow: rgba(0, 0, 0, 0.5);
  --accent-purple: #9b59b6;
}

/* Light space theme variables */
.light-theme {
  --space-dark: #f5f7fa;
  --space-medium: #e4e9f0;
  --space-light: #d0d7e1;
  --text-primary: #2c3e50;
  --text-secondary: #546778;
  --card-shadow: rgba(0, 0, 0, 0.1);
  --star-color: rgba(0, 0, 0, 0.1);
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  position: relative;
}

/* Content container spacing */
#content-container {
  margin-top: 0;
  min-height: calc(100vh - 100px); /* Ensure content has proper height */
}

.nav-container {
  background-color: var(--bg-secondary); 
  padding: 0rem 0.5rem;
  position: sticky; 
  top: 0; 
  z-index: 100; 
  box-shadow: 0 2px 4px var(--card-shadow); 
  border-bottom: 2px solid var(--accent-blue); 
  transition: transform 0.3s ease, opacity 0.3s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 auto; 
  flex-wrap: wrap;
}

.header-content {
  display: flex;
  align-items: center;
  position: relative;
  z-index: 2;
}

.header-left h1 {
  font-size: 2rem;
  margin-bottom: 0rem;
  color: var(--text-primary);
}

.header-left p {
  font-size: 0.8rem;
  color: var(--accent-blue);
  margin-bottom: 0;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  padding: 0.3rem 0;
}

.nav-links a:hover {
  color: var(--accent-blue);
}

.nav-links a.active {
  color: var(--accent-blue);
  border-bottom: 2px solid var(--accent-blue);
}

.nav-right-content {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.hamburger-menu {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding-right: 25px;
}

/* Toggle button (theme and language) */
.toggle-button {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: none;
  display: grid;
  place-items: center;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-left: 1rem;
}

.toggle-button:hover {
  transform: scale(1.1);
}

.toggle-button i {
  font-size: 1.2rem;
}

.nav-buttons {
  display: flex;
  align-items: center;
  z-index: 200;
  padding-right: 25px;
}

/* Hide French content by default */
.fr {
  display: none !important;
}

/* When French language is active */
.french-active .en {
  display: none !important;
}

.french-active .fr {
  display: block !important;
}

.loading-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 5rem; /* Default for content-area loading */
    min-height: 300px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--bg-secondary); /* Default base, can be overridden */
    border-top: 5px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@media (max-width: 850px) {
  .nav-container {
    flex-wrap: nowrap;
  }

  .nav-right-content {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--bg-secondary);
    padding: 1rem 2rem;
    box-shadow: 0 4px 6px var(--card-shadow);
    width: 250px; /* Or adjust as needed */
    z-index: 150;
    border-bottom-left-radius: 8px;
  }

  .nav-right-content.active {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    width: 100%;
  }

  .nav-links a {
    padding: 0.5rem 0;
  }

  .nav-buttons {
    flex-direction: row;
    justify-content: flex-start;
    gap: 1rem;
    margin-top: 1rem;
    width: 100%;
    border-top: 1px solid var(--bg-accent);
    padding-top: 1rem;
  }

  .hamburger-menu {
    display: block;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    width: 100%;
  }

  .nav-links a {
    padding: 0.5rem 0;
  }

  .nav-buttons {
    flex-direction: row;
    justify-content: flex-start;
    gap: 1rem;
    margin-top: 1rem;
    width: 100%;
    border-top: 1px solid var(--bg-accent);
    padding-top: 1rem;
  }

  .hamburger-menu {
    display: block;
  }
}