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

    :root {
      --bg:           #f9f8f6;
      --surface:      #ffffff;
      --surface-alt:  #f3f2ef;
      --border:       rgba(0,0,0,0.10);
      --border-mid:   rgba(0,0,0,0.16);
      --text-primary: #1a1a18;
      --text-second:  #5a5a56;
      --text-muted:   #9a9a94;
      --accent:       #1D9E75;
      --accent-bg:    #e1f5ee;
      --accent-text:  #0f6e56;
      --info-bg:      #e6f1fb;
      --info-text:    #185fa5;
      --serif:        'Lora', Georgia, serif;
      --sans:         'DM Sans', system-ui, sans-serif;
      --mono:         'DM Mono', 'Courier New', monospace;
    }

    html { font-size: 16px; scroll-behavior: smooth; }

    body {
      font-family: var(--sans);
      background: var(--bg);
      color: var(--text-primary);
      line-height: 1.7;
      min-height: 100vh;
      font-size: 14px;
    }

    /* ── Layout ── */
    .page {
      max-width: 760px;
      margin: 0 auto;
      padding: 2rem 2rem 6rem;
    }

    h3{ padding: 2rem 0 0.5rem 0.5rem; }
    a{ color: var(--text-second);}
    .item{ padding: 2rem 0; text-align: justify;}
    .item p{ color: var(--text-second); padding: 0.5rem 0;}
    .item ul{ direction: none; padding: 1rem 1rem; color: var(--text-second);}
    .item table{ width: 100%; font-size: 10px; padding: 1rem 0;}

    /* ── Badge ── */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      font-family: var(--mono);
      font-size: 11px;
      letter-spacing: 0.08em;
      background: var(--surface-alt);
      border: 0.5px solid var(--border-mid);
      border-radius: 5px;
      padding: 5px 12px;
      color: var(--text-second);
      margin-bottom: 1.75rem;
    }
    .badge-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
      flex-shrink: 0;
    }

    /* ── Hero ── */
    .hero-headline {
      font-family: var(--sans);
      font-size: clamp(2rem, 5vw, 2.85rem);
      font-weight: 600;
      line-height: 1.16;
      letter-spacing: -0.02em;
      margin-bottom: 1.25rem;
      color: var(--text-primary);
      text-transform: uppercase;
    }
    .hero-headline em {
      font-style: italic;
      color: var(--text-second);
    }
    .hero-lead {
      font-size: 1.05rem;
      font-weight: 300;
      line-height: 1.8;
      color: var(--text-second);
      max-width: 600px;
      margin-bottom: 0;
    }

    /* ── Divider ── */
    .divider {
      height: 0.5px;
      background: var(--border);
      margin: 3rem 0;
    }

    /* ── Section Labels & Titles ── */
    .section-label {
      font-family: var(--mono);
      font-size: 10px;
      letter-spacing: 0.13em;
      text-transform: uppercase;
      color: var(--text-muted);
      margin-bottom: 0.65rem;
    }
    .section-title {
      font-family: var(--sans);
      font-size: 1.45rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
      color: var(--text-primary);
      text-transform: uppercase;
    }
    .body-text {
      font-size: 0.93rem;
      line-height: 1.82;
      color: var(--text-second);
      margin-bottom: 1rem;
      max-width: 640px;
    }

    /* ── Standards Grid ── */
    .standards-grid {
      overflow: hidden;
      margin-top: 1.5rem;
    }
    .std-cell {
      padding: 1.35rem 1.6rem;
    }
    .std-label {
      font-family: var(--mono);
      font-size: 10px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .std-name {
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 5px;
      color: var(--text-primary);
    }
    .std-desc {
      font-size: 12.5px;
      color: var(--text-second);
      line-height: 1.6;
    }

    /* ── Accuracy Panel ── */
    .accuracy-panel {
      padding: 1.75rem 2rem;
      margin-top: 1.5rem;
    }
    .accuracy-grid {
      padding-top: 2rem;
      padding-bottom: 1rem;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
    }
    .acc-item {
      text-align: center;
      padding: 0.5rem 0;
    }
    .acc-num {
      font-family: var(--mono);
      font-size: 1.85rem;
      font-weight: 500;
      color: var(--text-primary);
      margin-bottom: 5px;
      line-height: 1;
    }
    .acc-label {
      font-size: 11.5px;
      color: var(--text-second);
      line-height: 1.45;
    }

    /* ── Who cards ── */
    .who-grid {
      margin-top: 1.5rem;
    }
    .who-card {
      padding: 1.1rem 1.2rem;
    }
    .who-tag {
      display: inline-block;
      font-family: var(--mono);
      font-size: 10px;
      color: var(--mono);
      padding: 3px 0px;
      margin-bottom: 9px;
      letter-spacing: 0.04em;
    }
    .who-role {
      font-size: 13.5px;
      font-weight: 500;
      margin-bottom: 5px;
      color: var(--text-primary);
    }
    .who-text {
      font-size: 12.5px;
      color: var(--text-second);
      line-height: 1.6;
    }

    /* ── Methodology ── */
    .methodology {
      padding-left: 1.4rem;
      margin-top: 1.5rem;
      gap: 1.15rem;
      padding: 1rem 1rem;

    }
    .meth-step {
      padding: 1rem 0;
    }
    .meth-n {
      font-family: var(--mono);
      font-size: 10px;
      color: var(--text-muted);
      margin-bottom: 4px;
      letter-spacing: 0.05em;
    }
    .meth-title {
      font-size: 13.5px;
      font-weight: 500;
      margin-bottom: 4px;
      color: var(--text-primary);
    }
    .meth-text {
      font-size: 12.5px;
      color: var(--text-second);
      line-height: 1.65;
    }

    /* ── References ── */
    .refs-table {
      overflow: hidden;
      margin-top: 1.5rem;
    }
    .ref-row {
      display: flex;
      gap: 16px;
      align-items: baseline;
      padding: 1rem 1.1rem;
      font-size: 12.5px;
      line-height: 1.55;
    }
    .ref-code {
      font-family: var(--mono);
      font-size: 10.5px;
      color: var(--text-muted);
      white-space: nowrap;
      min-width: 90px;
      flex-shrink: 0;
    }
    .ref-title {
      color: var(--text-second);
    }

    /* ── Principles ── */
    .principles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 1.5rem;
    }
    .principle {
      padding: 1.1rem 1.2rem;
    }
    .p-icon {
      font-family: var(--mono);
      font-size: 1.3rem;
      color: var(--text-primary);
      margin-bottom: 9px;
      line-height: 1;
    }
    .p-title {
      font-size: 13.5px;
      font-weight: 500;
      margin-bottom: 5px;
      color: var(--text-primary);
    }
    .p-text {
      font-size: 12.5px;
      color: var(--text-second);
      line-height: 1.6;
    }

    /* ── Footer note ── */
    .footer-note {
      font-family: var(--mono);
      font-size: 11px;
      color: var(--text-muted);
      text-align: center;
      margin-top: 3rem;
      letter-spacing: 0.03em;
    }

    /* ── Subtle entrance animation ── */
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(16px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    .page > * {
      animation: fadeUp 0.5s ease both;
    }
    .badge            { animation-delay: 0.05s; }
    .hero-headline    { animation-delay: 0.12s; }
    .hero-lead        { animation-delay: 0.18s; }
    .divider:nth-of-type(1) { animation-delay: 0.22s; }

     header{background-color:#080E1C; }
    header a{text-decoration: none; color: #fff; font-weight: 700;}
   .bc a {text-decoration: none;}
    .top, .bc{max-width: 760px;margin: 0 auto; padding: 1rem;}
    .back{font-family: var(--mono); text-transform: uppercase; font-weight: 400; font-size: 12px;float: right; padding-top: 2px; color: #ccc;}

    /* ── Responsive ── */
    @media (max-width: 600px) {
      .page { padding: 3rem 1.25rem 4rem; }
      .standards-grid  { grid-template-columns: 1fr; }
      .who-grid        { grid-template-columns: 1fr; }
      .principles-grid { grid-template-columns: 1fr; }
      .accuracy-grid   { grid-template-columns: 1fr; }
      .acc-item + .acc-item { border-left: none; border-top: 0.5px solid var(--border-mid); padding-top: 1rem; margin-top: 1rem; }
    }

    @media(max-width:380px){
      .top .back{display: none !important;}
    }