:root {
    --bg-light: #ffffff;
    --text-light: #222;
    --card-light: #f9f9f9;
  
    --bg-dark: #121212;
    --text-dark: #f1f1f1;
    --card-dark: #1e1e1e;
  }
  
  [data-theme='light'] {
    --bg: var(--bg-light);
    --text: var(--text-light);
    --card: var(--card-light);
  }
  
  [data-theme='dark'] {
    --bg: var(--bg-dark);
    --text: var(--text-dark);
    --card: var(--card-dark);
  }
  
  html, body {
    min-height: 100vh;
    height: 100%;
    margin: 0;
    padding: 0;
    transition: background 1.2s cubic-bezier(0.77, 0, 0.175, 1),
                filter 1.2s cubic-bezier(0.77, 0, 0.175, 1),
                box-shadow 1.2s cubic-bezier(0.77, 0, 0.175, 1);
    font-family: 'Roboto', sans-serif;
}

* {
    transition: color 0.8s cubic-bezier(0.77, 0, 0.175, 1),
                background-color 0.8s cubic-bezier(0.77, 0, 0.175, 1),
                box-shadow 0.8s cubic-bezier(0.77, 0, 0.175, 1),
                filter 0.8s cubic-bezier(0.77, 0, 0.175, 1);
}

[data-theme='dark'] body {
    background: linear-gradient(135deg, #232526 0%, #414345 100%);
}
  
  .container {
    max-width: 1000px;
    margin: auto;
    padding: 2rem;
    text-align: center;
  }
  
  #theme-toggle {
    padding: 0.5rem 1rem;
    margin-bottom: 2rem;
    cursor: pointer;
    border: none;
    background-color: var(--card);
    color: var(--text);
    border-radius: 5px;
    transition: background-color 0.3s;
  }

#theme-toggle:hover {
    background-color: var(--bg);
    color: var(--text);
    box-shadow: 0 4px 16px rgba(0,123,255,0.15);
    transform: scale(1.07);
    transition: background-color 0.2s, color 0.2s, box-shadow 0.2s, transform 0.1s;
}

#theme-toggle:active {
    background-color: rgba(0,123,255,0.15);
    color: var(--text);
    transform: scale(0.96);
    box-shadow: 0 2px 8px rgba(0,123,255,0.10);
    transition: background-color 0.1s, transform 0.05s;
}
  
  .gallery {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .card {
    background-color: var(--card);
    border-radius: 10px;
    padding: 1rem;
    width: 300px;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  }
  
  .card:hover {
    transform: translateY(-10px) scale(1.10);
    box-shadow: 0 16px 32px 0 rgba(0, 123, 255, 0.25), 0 10px 20px rgba(0,0,0,0.2);
    background-color: rgba(0, 123, 255, 0.07);
}

.card:active {
    transform: translateY(-2px) scale(0.97);
    box-shadow: 0 2px 24px 0 rgba(0, 123, 255, 0.30), 0 2px 8px rgba(0,0,0,0.18);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
  
  .card img {
    width: 100%;
    border-radius: 8px;
  }
  
  .fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 1s forwards;
  }
  
  .fade-in:nth-child(1) { animation-delay: 0.2s; }
  .fade-in:nth-child(2) { animation-delay: 0.4s; }
  .fade-in:nth-child(3) { animation-delay: 0.6s; }
  
  @keyframes fadeIn {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }