:root{
    --bg: #EEF1F6;
    --surface: #FFFFFF;
    --ink: #1F2430;
    --ink-muted: #5B6472;
    --pen: #C7392B;
    --marker: #2C5F86;
    --rule: rgba(31,36,48,0.09);
    --hairline: rgba(31,36,48,0.12);
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:'Inter', sans-serif;
    overflow-x:hidden;
  }
  ::selection{ background:var(--pen); color:#fff; }
  a{color:inherit; text-decoration:none;}
  .sr-only{
    position:absolute; width:1px; height:1px; padding:0; margin:-1px;
    overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
  }

  /* ================= HEADER ================= */
  .site-header{
    position:fixed; top:0; left:0; right:0; z-index:50;
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    height:76px;
    padding:0 clamp(20px, 5vw, 56px);
    background:rgba(238,241,246,0);
    border-bottom:1px solid rgba(31,36,48,0);
    transition:background 0.3s ease, border-color 0.3s ease;
  }
  .site-header.is-solid{
    background:rgba(238,241,246,0.92);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--hairline);
  }
  .header-logo-cell{ /* justify-self is set by JS from LOGO_CONFIG.headerAlign */ }
  .header-logo-link{
    font-family:'Libre Caslon Text', serif;
    font-weight:700;
    font-size:24px;
    line-height:1;
    letter-spacing:0.01em;
    color:var(--ink);
    opacity:0; /* visual is provided by the animated overlay; kept in a11y tree */
  }
  .nav-links{
    justify-self:center;
    display:flex; gap:32px;
    font-size:0.9rem;
    opacity:0; transform:translateY(-6px);
    transition:opacity 0.35s ease, transform 0.35s ease;
    pointer-events:none;
  }
  .nav-links.is-visible{ opacity:1; transform:translateY(0); pointer-events:auto; }
  .nav-links a{ color:var(--ink-muted); transition:color 0.2s ease; }
  .nav-links a:hover{ color:var(--ink); }
  .header-cta{
    justify-self:end;
    font-size:0.85rem; padding:10px 20px;
    border:1px solid var(--hairline); border-radius:2px;
    opacity:0; transform:translateY(-6px);
    transition:opacity 0.35s ease, transform 0.35s ease, border-color 0.2s ease;
    pointer-events:none;
  }
  .header-cta.is-visible{ opacity:1; transform:translateY(0); pointer-events:auto; }
  .header-cta:hover{ border-color:var(--pen); color:var(--pen); }

  /* ============ ANIMATED LOGO OVERLAY ============ */
  #letterOverlay{
    position:fixed; inset:0; z-index:60;
    pointer-events:none;
    opacity:0; /* JS reveals it once positions are measured; noscript fallback below */
  }
  #letterOverlay.is-ready{ opacity:1; }
  .ol-letter{
    position:fixed; top:0; left:0;
    font-family:'Libre Caslon Text', serif;
    font-weight:700;
    color:var(--ink);
    line-height:1;
    white-space:pre;
    will-change:transform;
  }
  .ol-letter.is-removed{ color:var(--pen); }

  /* ================= HERO ================= */
  .hero{
    position:relative;
    min-height:100vh;
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    text-align:center;
    padding:0 24px;
  }
  .hero-rule-lines{
    position:absolute; inset:0;
    background-image:repeating-linear-gradient(to bottom, transparent, transparent 39px, var(--rule) 40px);
    z-index:0;
  }
  .hero-eyebrow{
    position:relative; z-index:1;
    font-family:'IBM Plex Mono', monospace;
    font-size:0.72rem; letter-spacing:0.14em; text-transform:uppercase;
    color:var(--marker);
    margin-bottom:22px;
  }
  .hero-logo-a11y{
    position:relative; z-index:1;
    font-family:'Libre Caslon Text', serif;
    font-weight:700;
    font-size:clamp(2.2rem, 9vw, 6.5rem);
    line-height:1;
    letter-spacing:0.01em;
    opacity:0; /* real accessible heading, visually replaced by the overlay */
    max-width:100%;
  }
  .hero-letters span{ display:inline; }
  .hero-tagline{
    position:relative; z-index:1;
    margin-top:32px; max-width:560px;
    color:var(--ink-muted);
    font-size:1.05rem; line-height:1.7;
  }
  .hero-tagline .mark{
    color:var(--ink);
    position:relative;
  }
  .hero-actions{
    position:relative; z-index:1;
    margin-top:36px;
    display:flex; align-items:center; gap:20px; flex-wrap:wrap; justify-content:center;
  }
  .btn-primary{
    display:inline-block;
    background:var(--ink); color:#fff;
    padding:15px 32px; border-radius:2px;
    font-size:0.92rem;
    transition:background 0.2s ease;
  }
  .btn-primary:hover{ background:var(--pen); }
  .hero-note{
    position:relative; z-index:1;
    font-family:'Caveat', cursive;
    font-size:1.4rem; color:var(--pen);
    transform:rotate(-3deg);
  }
  /* floating "scroll to next section" button — visible on every section
     except the last one, does the same thing as pressing ArrowDown */
  .scroll-down-btn{
    position:fixed; bottom:28px; left:50%; transform:translateX(-50%);
    width:44px; height:44px; border-radius:50%;
    background:var(--surface); border:1px solid var(--hairline);
    display:flex; align-items:center; justify-content:center;
    cursor:pointer; z-index:40;
    transition:opacity 0.3s ease, border-color 0.2s ease, transform 0.2s ease;
  }
  .scroll-down-btn:hover{ border-color:var(--pen); transform:translateX(-50%) translateY(3px); }
  .scroll-down-btn svg{ width:16px; height:16px; stroke:var(--ink); }
  .scroll-down-btn.is-hidden{ opacity:0; pointer-events:none; }
  @keyframes scrollpulse{
    0%,100%{ transform:translateY(0); }
    50%{ transform:translateY(4px); }
  }
  .scroll-down-btn svg{ animation:scrollpulse 1.8s ease-in-out infinite; }

  /* ================= SECTIONS ================= */
  section{ padding:110px clamp(24px, 6vw, 80px); }
  .section-head{ max-width:620px; margin-bottom:56px; }
  .section-eyebrow{
    font-family:'IBM Plex Mono', monospace; font-size:0.7rem;
    letter-spacing:0.14em; text-transform:uppercase; color:var(--marker);
    display:block; margin-bottom:14px;
  }
  .section-title{
    font-family:'Libre Caslon Text', serif; font-weight:700;
    font-size:clamp(1.7rem, 3.6vw, 2.4rem); line-height:1.25;
  }
  .section-body{ color:var(--ink-muted); margin-top:16px; line-height:1.7; }

  /* method cards */
  .method-grid{
    display:grid; grid-template-columns:1fr; gap:1px;
    background:var(--hairline); border:1px solid var(--hairline);
  }
  @media (min-width:780px){
    .method-grid{ grid-template-columns:repeat(3, 1fr); }
  }
  .method-card{ background:var(--surface); padding:34px 28px; }
  .method-title{ font-family:'Libre Caslon Text', serif; font-weight:700; font-size:1.2rem; }
  .method-desc{ margin-top:12px; color:var(--ink-muted); font-size:0.92rem; line-height:1.65; }

  /* levels */
  .levels-grid{
    display:grid; grid-template-columns:repeat(auto-fit, minmax(150px, 1fr)); gap:14px;
  }
  .level-card{
    background:var(--surface); border:1px solid var(--hairline); border-radius:4px;
    padding:22px 20px;
  }
  .level-code{
    font-family:'IBM Plex Mono', monospace; font-weight:500; font-size:1rem; color:var(--pen);
  }
  .level-name{ margin-top:8px; font-size:0.95rem; font-weight:500; }
  .level-desc{ margin-top:6px; font-size:0.82rem; color:var(--ink-muted); line-height:1.5; }

  /* process steps */
  .process-list{ display:flex; flex-direction:column; }
  .process-step{
    display:grid; grid-template-columns:56px 1fr; gap:24px;
    padding:30px 0; border-top:1px solid var(--hairline);
  }
  .process-step:last-child{ border-bottom:1px solid var(--hairline); }
  .process-num{ font-family:'IBM Plex Mono', monospace; color:var(--pen); font-size:0.85rem; padding-top:4px; }
  .process-title{ font-family:'Libre Caslon Text', serif; font-weight:700; font-size:1.25rem; }
  .process-desc{ margin-top:8px; color:var(--ink-muted); max-width:520px; line-height:1.7; }

  /* cta */
  .cta-section{ background:var(--surface); border-top:1px solid var(--hairline); border-bottom:1px solid var(--hairline); text-align:center; }
  .cta-section .section-head{ margin:0 auto 32px; text-align:center; }

  /* contact links */
  .contact-links{
    display:flex; flex-wrap:wrap; justify-content:center; gap:14px;
  }
  .contact-link{
    display:flex; flex-direction:column; align-items:flex-start; gap:2px;
    padding:16px 24px;
    border:1px solid var(--hairline); border-radius:2px;
    background:var(--bg);
    transition:border-color 0.2s ease, background 0.2s ease;
    min-width:180px;
  }
  .contact-link:hover{ border-color:var(--pen); background:var(--surface); }
  .contact-label{
    font-family:'IBM Plex Mono', monospace; font-size:0.7rem;
    letter-spacing:0.08em; text-transform:uppercase; color:var(--ink-muted);
  }
  .contact-value{ font-size:1rem; font-weight:500; color:var(--ink); }

  footer{
    padding:56px clamp(24px, 6vw, 80px) 40px;
    display:flex; flex-wrap:wrap; justify-content:space-between; gap:28px;
    color:var(--ink-muted); font-size:0.85rem;
  }
  .footer-logo{ font-family:'Libre Caslon Text', serif; font-weight:700; font-size:1.15rem; color:var(--ink); }
  .footer-links{ display:flex; gap:26px; }
  .footer-links a:hover{ color:var(--ink); }

  /* testimonials */
  .testimonial-grid{
    display:grid; grid-template-columns:1fr; gap:1px;
    background:var(--hairline); border:1px solid var(--hairline);
  }
  @media (min-width:780px){
    .testimonial-grid{ grid-template-columns:repeat(3, 1fr); }
  }
  .testimonial-card{ background:var(--surface); padding:32px 28px; display:flex; flex-direction:column; }
  .testimonial-quote-mark{
    font-family:'Caveat', cursive; font-size:2.4rem; color:var(--pen);
    line-height:0.6; margin-bottom:10px;
  }
  .testimonial-text{ color:var(--ink); font-size:0.95rem; line-height:1.65; flex:1; }
  .testimonial-footer{
    display:flex; align-items:center; gap:12px; margin-top:22px;
    padding-top:18px; border-top:1px solid var(--hairline);
  }
  .testimonial-avatar{
    width:38px; height:38px; border-radius:50%;
    background:var(--bg); border:1px solid var(--hairline);
    display:flex; align-items:center; justify-content:center;
    font-family:'IBM Plex Mono', monospace; font-size:0.78rem; font-weight:500; color:var(--marker);
    flex-shrink:0;
  }
  .testimonial-name{ font-size:0.9rem; font-weight:500; }
  .testimonial-level{
    font-family:'IBM Plex Mono', monospace; font-size:0.72rem; color:var(--ink-muted); margin-top:2px;
  }

  /* ================= MOBILE ================= */
  @media (max-width:680px){
    .site-header{ padding:0 16px; height:64px; grid-template-columns:auto 1fr auto; }
    .nav-links{ display:none; }
    .header-cta{ font-size:0.78rem; padding:8px 14px; }
    section{ padding:72px 20px; }
    .hero{ padding:0 16px; }
    .hero-actions{ flex-direction:column; gap:16px; }
    .process-step{ grid-template-columns:40px 1fr; gap:16px; }
  }

  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior:auto; }
    .ol-letter{ transition:none !important; }
  }