:root {
      --bg: #0f1220;
      --card: #1a1f36;
      --accent: #6aa6ff;
      --text: #eaeaf0;
      --muted: #aab0d6;
    }
 * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
        sans-serif;
    }
    body {
      min-height: 100vh;
      background: linear-gradient(135deg, #0f1220, #1a1030);
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: center;
    }

footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* container for main page */
.maincontainer {
  max-width: 900px;
  width: 100%;
  padding: 2rem;
  text-align: center;
}

/* container for selector page */
.container {
  width: 100%;
  max-width: 600px;
  padding: 2rem;
  text-align: center;
}


  /* home button in selector */
  .home {
      margin-top: 2rem;
      display: inline-block;
      text-decoration: none;
      color: var(--muted);
      font-size: 0.9rem;
      transition: color 0.15s ease;
    }

  .home:hover {
      color: var(--accent);
  }

/* tree and package buttons */
.card {
  display: block;
  padding: 1.5rem;
  background: var(--card);
  border-radius: 14px;
  text-decoration: none;
  color: var(--text);
  font-size: 1.15rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s;
}

.card:hover {
  transform: translateY(-4px);
  background: #222867;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
  color: var(--accent);
}

/* grid for tree package buttton */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
}
  

    ul {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 1rem;
    }

    li a {
      display: block;
      padding: 1rem;
      background: var(--card);
      border-radius: 12px;
      text-decoration: none;
      color: var(--text);
      font-size: 1.1rem;
      transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s;
    }

    li a:hover {
      transform: translateY(-4px);
      background: #222867;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
      color: var(--accent);
    }
   h1 {
      font-size: 1.6rem;
      margin-bottom: 2rem;
      color: var(--muted);
    }




    header {
      margin-bottom: 2rem;
    }

    header h1 {
      font-size: 2rem;
      margin-bottom: 0.5rem;
    }

    header p {
      color: var(--muted);
      font-size: 0.95rem;
    }