* { margin: 0; padding: 0; box-sizing: border-box; }

  body {
    background: #0d1117;
    color: #c9d1d9;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 16px;
    line-height: 1.7;
  }

  a { color: #58a6ff; text-decoration: none; }
  a:hover { text-decoration: underline; }

  .container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  /* NAV */
  nav {
    border-bottom: 1px solid #21262d;
    padding: 1rem 0;
  }

  .nav-inner {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .nav-logo {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 15px;
    color: #e6edf3;
    font-weight: 500;
  }

  .nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
  }

  .nav-links a {
    font-size: 14px;
    color: #8b949e;
  }

  /* HERO */
  .hero {
    padding: 80px 0 60px;
    border-bottom: 1px solid #21262d;
  }

  .hero-tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: #3fb950;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
  }

  .hero h1 {
    font-size: 2.8rem;
    font-weight: 600;
    color: #e6edf3;
    line-height: 1.2;
    margin-bottom: 1rem;
  }

  .hero p {
    font-size: 17px;
    color: #8b949e;
    max-width: 620px;
    margin-bottom: 2rem;
  }

  .hero-actions {
    display: flex;
    gap: 1rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 14px;
    font-family: 'IBM Plex Sans', sans-serif;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    border: 1px solid #30363d;
    color: #c9d1d9;
    background: #21262d;
    transition: background 0.15s;
  }

  .btn:hover { background: #30363d; text-decoration: none; }

  .btn-blue {
    background: #1f6feb;
    border-color: #1f6feb;
    color: #fff;
  }

  .btn-blue:hover { background: #388bfd; border-color: #388bfd; }

  .stats-row {
    display: flex;
    gap: 2.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #21262d;
    flex-wrap: wrap;
  }

  .stat-num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.6rem;
    color: #58a6ff;
    display: block;
    font-weight: 500;
  }

  .stat-label {
    font-size: 12px;
    color: #8b949e;
  }

  /* SECTIONS */
  section {
    padding: 60px 0;
    border-bottom: 1px solid #21262d;
  }

  h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #e6edf3;
    margin-bottom: 0.5rem;
  }

  .section-sub {
    font-size: 15px;
    color: #8b949e;
    margin-bottom: 2.5rem;
  }

  /* PIPELINE STEPS */
  .steps {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid #21262d;
    border-radius: 6px;
    overflow: hidden;
  }

  .step {
    display: flex;
    gap: 1.5rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid #21262d;
    align-items: flex-start;
  }

  .step:last-child { border-bottom: none; }

  .step-num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: #58a6ff;
    background: #161b22;
    border: 1px solid #30363d;
    padding: 4px 8px;
    border-radius: 4px;
    flex-shrink: 0;
    margin-top: 2px;
  }

  .step-title {
    font-size: 15px;
    font-weight: 600;
    color: #e6edf3;
    margin-bottom: 0.25rem;
  }

  .step-desc {
    font-size: 14px;
    color: #8b949e;
    line-height: 1.6;
  }

  /* LAYERS */
  .layers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
  }

  @media (max-width: 600px) { .layers { grid-template-columns: 1fr; } }

  .layer {
    background: #161b22;
    border: 1px solid #21262d;
    border-radius: 6px;
    padding: 1.5rem;
  }

  .layer-num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: #3fb950;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
  }

  .layer h3 {
    font-size: 15px;
    font-weight: 600;
    color: #e6edf3;
    margin-bottom: 0.75rem;
  }

  .layer p {
    font-size: 14px;
    color: #8b949e;
    line-height: 1.6;
  }

  /* F1 SCORES TABLE */
  .score-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    border: 1px solid #21262d;
    border-radius: 6px;
    overflow: hidden;
  }

  .score-table th {
    background: #161b22;
    color: #8b949e;
    padding: 10px 16px;
    text-align: left;
    font-weight: 500;
    font-size: 13px;
    border-bottom: 1px solid #21262d;
  }

  .score-table td {
    padding: 9px 16px;
    border-bottom: 1px solid #21262d;
    color: #c9d1d9;
  }

  .score-table tr:last-child td { border-bottom: none; }
  .score-table tr:hover td { background: #161b22; }

  .score-bar-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .score-bar {
    width: 80px;
    height: 6px;
    background: #21262d;
    border-radius: 3px;
    overflow: hidden;
  }

  .score-fill { height: 100%; border-radius: 3px; background: #1f6feb; }
  .score-fill.hi { background: #3fb950; }
  .score-fill.mid { background: #d29922; }

  .score-val {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    color: #58a6ff;
    min-width: 32px;
  }

  /* TECH STACK */
  .tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0;
    border: 1px solid #21262d;
    border-radius: 6px;
    overflow: hidden;
  }

  .tech-item {
    padding: 1rem 1.25rem;
    border-right: 1px solid #21262d;
    border-bottom: 1px solid #21262d;
  }

  .tech-name {
    font-size: 14px;
    font-weight: 500;
    color: #e6edf3;
    display: block;
  }

  .tech-role {
    font-size: 12px;
    color: #8b949e;
  }

  /* METRICS ROW */
  .metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
  }

  .metric {
    background: #161b22;
    border: 1px solid #21262d;
    border-radius: 6px;
    padding: 1rem;
    text-align: center;
  }

  .metric-val {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.4rem;
    color: #58a6ff;
    display: block;
    font-weight: 500;
  }

  .metric-label {
    font-size: 12px;
    color: #8b949e;
  }

  /* FOOTER */
  footer {
    padding: 2rem 0;
    font-size: 13px;
    color: #8b949e;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
  }