:root {
    --blue-light: #a8d0ff;
    --blue: #3366ff;
    --blue-dark: #003399;
    --bg: #e5ecff;
    --text-dark: #0d1a4b;
    --white: #fff;
    --modal-bg: rgba(0, 0, 50, 0.75);
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --transition: 0.3s ease;
    --btn-radius: 30px;
    --btn-shadow: 0 6px 12px rgba(51, 102, 255, 0.3);
  }
  * {
    box-sizing: border-box;
  }
  body {
    margin: 0;
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--blue-light) 0%, var(--bg) 100%);
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 30px 15px;
  }
  header {
    text-align: center;
    margin-bottom: 40px;
  }
  header h1 {
    color: var(--blue-dark);
    font-weight: 900;
    font-size: 3rem;
    margin-bottom: 0.3em;
    text-shadow: 1px 1px 4px rgba(0, 51, 153, 0.3);
  }
  header p {
    color: var(--blue-dark);
    font-size: 1.3rem;
    font-weight: 600;
  }
  .buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    max-width: 720px;
    width: 100%;
  }
  button {
    background: var(--blue);
    border: none;
    border-radius: var(--btn-radius);
    padding: 14px 30px;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--white);
    cursor: pointer;
    box-shadow: var(--btn-shadow);
    transition: 
      background-color var(--transition),
      transform 0.2s ease,
      box-shadow var(--transition);
    user-select: none;
  }
  button:hover,
  button:focus {
    background: var(--blue-dark);
    outline: none;
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 51, 153, 0.6);
  }
  button:active {
    transform: scale(0.95);
  }
  /* Modal Styles */
  #modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--modal-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
  }
  #modal.show {
    opacity: 1;
    pointer-events: auto;
  }
  .modal-content {
    background: var(--white);
    border-radius: 20px;
    padding: 30px 35px;
    max-width: 520px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 25px rgba(0,0,80,0.2);
    position: relative;
    font-size: 1.2rem;
    color: var(--text-dark);
    line-height: 1.6;
    font-weight: 500;
    user-select: text;
    overflow-wrap: break-word;
    word-wrap: break-word;
    hyphens: auto;
  }
  .modal-content p {
    margin-bottom: 1.4em;
  }
  /* Close Button */
  #close-btn {
    position: absolute;
    top: 18px;
    right: 18px;
    background: transparent;
    border: none;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--blue-dark);
    cursor: pointer;
    transition: color 0.2s ease;
    line-height: 1;
  }
  #close-btn:hover,
  #close-btn:focus {
    color: var(--blue);
    outline: none;
  }
  /* Responsive */
  @media (max-width: 480px) {
    header h1 {
      font-size: 2rem;
    }
    header p {
      font-size: 1.1rem;
    }
    button {
      font-size: 1rem;
      padding: 12px 24px;
    }
    .modal-content {
      font-size: 1rem;
      padding: 25px 20px;
    }
  }