:root {
    --bg: #0f1220;
    --panel: #1a1f36;
    --panel-hover: #222867;
    --text: #eaeaf0;
    --accent: #2196f3;
    --shadow: rgba(0,0,0,0.4);
  }

  body {
    margin: 0;
    padding: 2rem;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: linear-gradient(135deg, #0f1220, #141a3a);
    color: var(--text);
  }

  /* Navigation */
  ul {
    list-style: none;
    display: flex;
    gap: 1rem;
    padding: 0;
    margin-bottom: 2rem;
    flex-wrap: wrap;
  }

  ul li a {
    text-decoration: none;
    color: var(--text);
    background: var(--panel);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: 0 3px 6px var(--shadow);
  }

  ul li a:hover {
    background: var(--panel-hover);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px var(--shadow);
  }

  iframe {
    width: 100%;
    max-width: 100%;
    height: 400px;
    border: 2px solid var(--panel);
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 6px 15px var(--shadow);
    background: var(--panel);
  }

  #main {
    width: 100%;
    max-width: 100%;
    background: var(--panel);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 8px 20px var(--shadow);
    overflow-x: auto;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
  }

  table td {
    padding: 0.6rem 1rem;
    vertical-align: top;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  table td:first-child {
    font-weight: 600;
    color: var(--accent);
    width: 220px;
  }

  table a {
    color: var(--accent);
    text-decoration: none;
  }

  table a:hover {
    text-decoration: underline;
  }

  pre {
    background: #12162a;
    color: #d6d6d6;
    padding: 1rem;
    border-radius: 12px;
    overflow-x: auto;
    box-shadow: 0 4px 12px var(--shadow);
  }

  code {
    font-family: "Fira Code", monospace;
    font-size: 0.9rem;
  }

  @media (max-width: 600px) {
    ul { flex-direction: column; gap: 0.5rem; }
    table td:first-child { width: 120px; }
  }