:root {
    --bg: #ffffff;
    --card: #f8fafc;
    --muted: #64748b;
    --text: #0f172a;
    --border: rgba(148, 163, 184, 0.2);
    --radius: 12px;
    --max-width: 800px;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI",
      Roboto, "Helvetica Neue", Arial;
  }
  
  body {
    margin: 0;
    background: linear-gradient(180deg, #f7fbfc, #eef2f7);
    color: var(--text);
    line-height: 1.7;
    padding: 36px 16px; /* reduce default padding slightly */
    display: flex;
    justify-content: center;
  }
  
  article {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: 0 6px 30px rgba(16, 24, 40, 0.08);
    border: 1px solid rgba(15, 23, 42, 0.04);
    max-width: var(--max-width);
    padding: 36px; /* slightly smaller for mobile */
    width: 100%;
    box-sizing: border-box;
  }
  
  h1 {
    font-size: 28px;
    margin-top: 0;
    letter-spacing: -0.2px;
    line-height: 1.3;
    background: linear-gradient(to right, #2563eb, #7e22ce, #db2777);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  h2 {
    font-size: 20px;
    margin-top: 28px;
    color: #111827;
  }
  
  p {
    margin-top: 12px;
    color: #0f172a;
  }
  
  a {
    color: #2563eb;
    text-decoration: none;
  }
  
  a:hover {
    text-decoration: underline;
  }
  
  footer {
    text-align: center;
    color: var(--muted);
    margin-top: 48px;
    font-size: 14px;
  }
  
  /* ================== MOBILE RESPONSIVE ================== */
  @media (max-width: 768px) {
    body {
      padding: 24px 12px;
    }
  
    article {
      padding: 24px;
    }
  
    h1 {
      font-size: 24px;
    }
  
    h2 {
      font-size: 18px;
      margin-top: 20px;
    }
  
    p {
      font-size: 15px;
    }
  }
  
  @media (max-width: 480px) {
    body {
      padding: 16px 8px;
    }
  
    article {
      padding: 16px;
    }
  
    h1 {
      font-size: 22px;
    }
  
    h2 {
      font-size: 16px;
      margin-top: 16px;
    }
  
    p {
      font-size: 14px;
    }
  }