*, *::before, *::after { box-sizing: border-box; }

  html, body { margin: 0; padding: 0; }

  body {
    font-family: Tahoma, Calibri, Arial, Helvetica, sans-serif;
    font-size: 17px;
    line-height: 1.7;
    color: #E4E00C;
    background-color: #0E1D25;
    background-image:
      radial-gradient(circle at 15% 0%, rgba(140,186,212,0.18), transparent 45%),
      radial-gradient(circle at 90% 100%, rgba(239,1,25,0.12), transparent 40%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  .site-header {
    background: linear-gradient(135deg, #8CBAD4 0%, #B1D0E2 55%, #8CBAD4 100%);
    border-bottom: 4px solid #EF0119;
    box-shadow: 0 6px 24px rgba(0,0,0,0.45);
    padding: 28px 20px;
    text-align: center;
  }

  .site-header .brand {
    margin: 0;
    font-variant: small-caps;
    font-weight: bold;
    letter-spacing: 2px;
    font-size: 2.1rem;
    color: #000;
    text-shadow: 0 1px 0 rgba(255,255,255,0.4);
  }

  .wrapper {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 32px 16px 48px;
    flex: 1 0 auto;
  }

  .sheet {
    background: rgba(8, 20, 27, 0.88);
    border: 1px solid rgba(140,186,212,0.35);
    border-radius: 14px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    padding: 36px 32px;
  }

  h1 {
    margin: 0 0 24px;
    text-align: center;
    font-variant: small-caps;
    font-weight: bold;
    font-size: 2.3rem;
    line-height: 1.2;
    color: #8CBAD4;
    padding-bottom: 16px;
    border-bottom: 2px solid #EF0119;
  }

  article { color: #E4E00C; }
  article p { margin: 14px 0; text-align: justify; }
  article h2, article h3, article h4, article h5, article h6 {
    text-align: center;
    font-variant: small-caps;
    margin: 28px 0 10px;
    line-height: 1.3;
  }
  article h2 { color: #B1D0E2; font-size: 1.8rem; }
  article h3 { color: #B0B0B0; font-size: 1.5rem; }
  article h4 { color: #D9D9D9; font-size: 1.3rem; }
  article h5, article h6 { color: #D9D9D9; font-size: 1.1rem; }
  article a { color: #EF0119; text-decoration: none; }
  article a:hover { color: #B1D0E2; text-decoration: underline; }
  article ul, article ol { margin: 14px 0 14px 24px; }
  article li { margin: 6px 0; color: #C7C7C7; }
  article table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    display: block;
    overflow-x: auto;
  }
  article th, article td {
    padding: 10px 12px;
    border: 1px solid rgba(140,186,212,0.3);
    text-align: left;
  }
  article th { background: #EF0119; color: #fff; }
  article img { max-width: 100%; height: auto; }

  .transition {
    margin-top: 32px;
    padding: 22px 24px;
    background: rgba(140,186,212,0.1);
    border-left: 4px solid #EF0119;
    border-radius: 8px;
    color: #E4E00C;
  }
  .transition p { margin: 10px 0; }

  .links-block {
    margin-top: 32px;
    padding: 26px 28px;
    background: rgba(177,208,226,0.08);
    border: 1px solid rgba(140,186,212,0.4);
    border-radius: 12px;
    overflow: hidden;
  }
  .links-block h3 {
    margin: 22px 0 10px;
    color: #B1D0E2;
    font-variant: small-caps;
    font-size: 1.4rem;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(239,1,25,0.6);
  }
  .links-block h3:first-child { margin-top: 0; }
  .links-block ul {
    list-style: none;
    margin: 0;
    padding: 0;
    column-count: 2;
    column-gap: 36px;
  }
  .links-block li {
    break-inside: avoid;
    padding: 5px 0 5px 16px;
    position: relative;
    word-wrap: break-word;
    overflow-wrap: anywhere;
  }
  .links-block li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.95em;
    width: 7px;
    height: 7px;
    background: #EF0119;
    border-radius: 50%;
  }
  .links-block a { color: #8CBAD4; text-decoration: none; }
  .links-block a:hover { color: #EF0119; text-decoration: underline; }

  .site-footer {
    flex-shrink: 0;
    background: #08141b;
    border-top: 3px solid #8CBAD4;
    padding: 22px 16px;
    text-align: center;
    color: #5F9FC4;
    font-size: 0.9rem;
  }
  .site-footer p { margin: 0; }

  @media (max-width: 768px) {
    body { font-size: 16px; }
    .site-header .brand { font-size: 1.5rem; letter-spacing: 1px; }
    .sheet { padding: 24px 18px; }
    h1 { font-size: 1.8rem; }
    article h2 { font-size: 1.5rem; }
    article h3 { font-size: 1.3rem; }
    .links-block { padding: 20px 18px; }
  }

  @media (max-width: 520px) {
    .wrapper { padding: 20px 10px 36px; }
    .sheet { padding: 20px 14px; border-radius: 10px; }
    h1 { font-size: 1.55rem; }
    .links-block ul { column-count: 1; }
  }