:root {
      --blue:var(--color-accent);
      --blue-strong:var(--color-accent-strong);
      --blue-soft:#edf5ff;
      --blue-faint:#f7fbff;
      --ink:var(--color-text);
      --ink-soft:#34445d;
      --muted:var(--color-text-muted);
      --muted-light:#8b97a8;
      --line:var(--color-line);
      --line-strong:#d5deea;
      --surface:#fff;
      --surface-soft:#f7f9fc;
      --max:1180px;
      --content:780px;
      --shadow-sm:0 10px 28px rgba(31,53,88,.06);
      --shadow-md:0 18px 48px rgba(31,53,88,.10);
    }

    * { box-sizing:border-box; }
    html { scroll-behavior:smooth; }
    body {
      margin:0;
      color:var(--ink);
      background:#fff;
      font-family:var(--font-sans);
      font-size:16px;
      line-height:var(--leading-ui);
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a { color:inherit; text-decoration:none; }
    button { font:inherit; }
    img { display:block; max-width:100%; }
    :focus-visible {
      outline:3px solid rgba(23,105,224,.22);
      outline-offset:3px;
    }
    .container {
      width:min(var(--max),calc(100% - 40px));
      margin-inline:auto;
    }

    /* Header */
    .site-header {
      position:sticky;
      top:0;
      z-index:50;
      border-bottom:1px solid rgba(227,233,241,.92);
      background:rgba(255,255,255,.94);
      backdrop-filter:blur(18px);
    }
    .header-inner {
      min-height:74px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:26px;
    }
    .logo img { width:174px; }
    .main-nav {
      display:flex;
      align-items:center;
      gap:28px;
      color:#526176;
      font-size:14px;
      font-weight:700;
    }
    .main-nav a {
      position:relative;
      padding:26px 0;
      transition:color .18s ease;
    }
    .main-nav a::after {
      content:"";
      position:absolute;
      left:0;
      right:0;
      bottom:19px;
      height:2px;
      border-radius:999px;
      background:var(--blue);
      transform:scaleX(0);
      transition:transform .18s ease;
    }
    .main-nav a:hover,
    .main-nav a[aria-current="page"] { color:var(--blue); }
    .main-nav a:hover::after,
    .main-nav a[aria-current="page"]::after { transform:scaleX(1); }
    .icon-button {
      width:43px;
      height:43px;
      display:grid;
      place-items:center;
      border:1px solid var(--line);
      border-radius:50%;
      background:#fff;
      color:var(--ink);
      cursor:pointer;
      transition:transform .18s ease,border-color .18s ease,color .18s ease;
    }
    .icon-button:hover {
      transform:translateY(-1px);
      color:var(--blue);
      border-color:#bfd0e5;
    }

    /* Hero */
    .page-hero {
      padding:38px 0 56px;
      border-bottom:1px solid var(--line);
      background:
        radial-gradient(circle at 17% -10%,rgba(23,105,224,.09),transparent 31%),
        linear-gradient(180deg,#fff,#fbfdff);
    }
    .breadcrumb {
      display:flex;
      align-items:center;
      gap:8px;
      margin-bottom:27px;
      color:var(--muted);
      font-size:var(--text-meta);
    }
    .breadcrumb a:hover { color:var(--blue); }
    .breadcrumb svg { width:12px; opacity:.72; }
    .hero-grid {
      display:block;
      max-width:820px;
    }
    h1 {
      margin:0;
      font-size:clamp(44px,5.8vw,64px);
      line-height:1.02;
      letter-spacing:-.052em;
    }
    .hero-copy {
      max-width:720px;
      margin:19px 0 0;
      color:var(--muted);
      font-size:var(--text-lead-desktop);
      line-height:1.6;
    }


    /* Layout */
    .page-content {
      padding:62px 0 0;
    }
    .editorial-grid {
      display:grid;
      grid-template-columns:220px minmax(0,var(--content));
      justify-content:center;
      gap:58px;
      align-items:start;
    }
    .toc {
      position:sticky;
      top:102px;
      padding-top:3px;
    }
    .toc-label {
      margin-bottom:12px;
      color:var(--muted);
      font-size:var(--text-label);
      font-weight:850;
      letter-spacing:.06em;
      text-transform:uppercase;
    }
    .toc a {
      display:block;
      padding:8px 0 8px 14px;
      border-left:2px solid #e4eaf2;
      color:var(--muted);
      font-size:var(--text-meta);
      line-height:1.4;
      transition:color .16s ease,border-color .16s ease;
    }
    .toc a:hover {
      color:var(--blue);
      border-left-color:var(--blue);
    }
    .article {
      min-width:0;
    }
    .intro {
      margin:0 0 46px;
      color:var(--ink-soft);
      font-size:var(--text-body-desktop);
      line-height:var(--leading-body);
    }
    .article-section {
      scroll-margin-top:108px;
      margin-top:54px;
    }
    .section-kicker {
      display:flex;
      align-items:center;
      gap:10px;
      margin-bottom:14px;
      color:var(--blue);
      font-size:var(--text-label);
      font-weight:900;
      letter-spacing:.07em;
      text-transform:uppercase;
    }
    .section-kicker::before {
      content:"";
      width:26px;
      height:3px;
      border-radius:99px;
      background:var(--blue);
    }
    h2 {
      margin:0;
      font-size:clamp(30px,4vw,40px);
      line-height:1.09;
      letter-spacing:-.042em;
    }
    .section-lead {
      margin:14px 0 0;
      color:var(--muted);
      font-size:var(--text-lead-mobile);
      line-height:1.6;
    }

    /* Process */
    .process-list {
      margin-top:28px;
      display:grid;
      gap:0;
      border-top:1px solid var(--line);
    }
    .process-item {
      display:grid;
      grid-template-columns:50px 1fr;
      gap:19px;
      padding:24px 0;
      border-bottom:1px solid var(--line);
    }
    .process-number {
      width:36px;
      height:36px;
      display:grid;
      place-items:center;
      border-radius:12px;
      background:var(--blue-soft);
      color:var(--blue);
      font-size:12px;
      font-weight:900;
    }
    .process-item h3 {
      margin:1px 0 6px;
      font-size:18px;
      line-height:1.3;
      letter-spacing:-.02em;
    }
    .process-item p {
      margin:0;
      color:var(--muted);
      font-size:var(--text-card);
      line-height:var(--leading-ui);
    }

    /* Criteria */
    .criteria-grid {
      margin-top:26px;
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:15px;
    }
    .criterion {
      padding:20px;
      border:1px solid var(--line);
      border-radius:18px;
      background:#fff;
    }
    .criterion-icon {
      width:34px;
      height:34px;
      display:grid;
      place-items:center;
      margin-bottom:13px;
      border-radius:11px;
      background:#f0f6ff;
      color:var(--blue);
    }
    .criterion h3 {
      margin:0;
      font-size:16px;
      letter-spacing:-.015em;
    }
    .criterion p {
      margin:7px 0 0;
      color:var(--muted);
      font-size:15px;
      line-height:var(--leading-ui);
    }

    /* What we don't do */
    .plain-list {
      margin:25px 0 0;
      padding:0;
      list-style:none;
      border-top:1px solid var(--line);
    }
    .plain-list li {
      position:relative;
      padding:17px 0 17px 28px;
      border-bottom:1px solid var(--line);
      color:var(--ink-soft);
      font-size:var(--text-card);
    }
    .plain-list li::before {
      content:"";
      position:absolute;
      left:1px;
      top:25px;
      width:8px;
      height:8px;
      border-radius:50%;
      border:2px solid #93b8ec;
    }

    /* Editorial note */
    .editorial-note {
      margin-top:27px;
      padding:22px 24px;
      border-left:3px solid var(--blue);
      border-radius:0 16px 16px 0;
      background:var(--blue-faint);
    }
    .editorial-note strong {
      display:block;
      margin-bottom:6px;
      font-size:15px;
    }
    .editorial-note p {
      margin:0;
      color:#53647c;
      font-size:15px;
      line-height:var(--leading-ui);
    }

    /* Correction CTA */
    .correction-box {
      margin-top:60px;
      padding:30px 32px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:28px;
      border:1px solid #dce6f2;
      border-radius:22px;
      background:
        radial-gradient(circle at 88% 30%,rgba(23,105,224,.08),transparent 30%),
        linear-gradient(110deg,#f7fbff,#fff 72%);
    }
    .correction-box h2 {
      font-size:clamp(27px,3.5vw,36px);
    }
    .correction-box p {
      max-width:600px;
      margin:9px 0 0;
      color:var(--muted);
      font-size:14px;
    }
    .button {
      min-height:48px;
      padding:0 20px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      flex:0 0 auto;
      border-radius:999px;
      background:linear-gradient(180deg,var(--blue),var(--blue-strong));
      color:#fff;
      font-size:14px;
      font-weight:850;
      box-shadow:0 10px 24px rgba(23,105,224,.18);
      transition:transform .18s ease,box-shadow .18s ease;
    }
    .button:hover {
      transform:translateY(-1px);
      box-shadow:0 13px 28px rgba(23,105,224,.23);
    }

    /* Footer */
    .site-footer {
      margin-top:72px;
      padding:38px 0 20px;
      background:#16263f;
      color:#d5dfec;
    }
    .footer-grid {
      display:grid;
      grid-template-columns:1.35fr repeat(3,.75fr);
      gap:34px;
    }
    .footer-brand img {
      width:174px;
      filter:brightness(0) invert(1);
      opacity:.94;
    }
    .footer-brand p {
      max-width:340px;
      color:#9fb0c5;
      font-size:14px;
    }
    .footer-col h3 {
      margin:0 0 13px;
      color:#fff;
      font-size:14px;
    }
    .footer-col a {
      display:block;
      margin:8px 0;
      color:#aebcd0;
      font-size:13px;
    }
    .footer-col a:hover { color:#fff; }
    .footer-bottom {
      margin-top:31px;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.09);
      color:#8395ac;
      font-size:12px;
    }
    .preview-note {
      position:fixed;
      z-index:60;
      left:14px;
      bottom:14px;
      padding:7px 11px;
      border:1px solid var(--line);
      border-radius:999px;
      background:rgba(255,255,255,.94);
      box-shadow:var(--shadow-sm);
      color:var(--muted);
      font-size:var(--text-label);
    }

    @media(max-width:1000px) {
      .main-nav { display:none; }
      .editorial-grid {
        grid-template-columns:1fr;
        gap:0;
      }
      .toc {
        position:static;
        margin-bottom:34px;
        padding:15px 18px;
        border:1px solid var(--line);
        border-radius:16px;
        background:#fff;
      }
      .toc nav {
        display:flex;
        flex-wrap:wrap;
        gap:7px 17px;
      }
      .toc-label { margin-bottom:8px; }
      .toc a {
        padding:4px 0;
        border-left:0;
        color:#66758a;
      }
      .footer-grid { grid-template-columns:1.3fr repeat(2,1fr); }
      .footer-col:last-child { grid-column:2/-1; }
    }

    @media(max-width:720px) {
      .container { width:min(var(--max),calc(100% - 36px)); }
      .header-inner { min-height:68px; }
      .logo img { width:150px; }
      .page-hero { padding:27px 0 39px; }
      h1 { font-size:clamp(39px,11vw,52px); }
      .hero-copy { font-size:var(--text-lead-mobile); }
      .hero-note { padding:20px; }
      .page-content { padding-top:42px; }
      .toc { margin-bottom:28px; }
      .intro { font-size:var(--text-body-mobile); margin-bottom:39px; }
      .article-section { margin-top:46px; }
      .criteria-grid { grid-template-columns:1fr; }
      .process-item { grid-template-columns:42px 1fr; gap:14px; }
      .correction-box {
        padding:26px 23px;
        align-items:flex-start;
        flex-direction:column;
      }
      .button { width:100%; }
      .footer-grid { grid-template-columns:1fr 1fr; }
      .footer-brand { grid-column:1/-1; }
      .footer-col:last-child { grid-column:auto; }
      .preview-note { display:none; }
    }

    @media(max-width:460px) {
      .footer-grid { grid-template-columns:1fr; }
      .footer-brand { grid-column:auto; }
    }