:root{
    --ink:#16262E;
    --ink-soft:#3C4C51;
    --paper:#FBFBF9;
    --paper-alt:#F1F2EE;
    --gold:#B8863B;
    --gold-soft:#E7D3AE;
    --teal:#3E6E67;
    --line:#DEE1DA;
    --muted:#5B6B66;
    --max:1120px;
    --serif:'Petrona', Georgia, serif;
    --sans:'Public Sans', -apple-system, Helvetica, Arial, sans-serif;
    --mono:'IBM Plex Mono', ui-monospace, monospace;
  }

  *{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; }
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--sans);
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; }
  section{ padding:96px 0; }
  .wrap{ max-width:var(--max); margin:0 auto; padding:0 32px; }

  h1,h2,h3{ font-family:var(--serif); font-weight:500; margin:0; letter-spacing:-0.01em; }
  .eyebrow{
    font-family:var(--mono); font-size:12.5px; letter-spacing:0.12em; text-transform:uppercase;
    color:var(--teal); margin:0 0 18px 0; font-weight:500;
  }
  .lede{ font-size:19px; color:var(--ink-soft); max-width:52ch; }

  /* ---------- Nav ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(251,251,249,0.86); backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .navrow{
    max-width:var(--max); margin:0 auto; padding:18px 32px;
    display:flex; align-items:center; justify-content:space-between;
  }
  .wordmark{ display:inline-flex; align-items:center; text-decoration:none; }
  .wordmark img{ height:44px; width:auto; display:block; }
  nav ul{ list-style:none; display:flex; gap:32px; margin:0; padding:0; }
  nav a{ text-decoration:none; font-size:14.5px; color:var(--ink-soft); }
  nav a:hover{ color:var(--ink); }
  .navcta{
    border:1px solid var(--ink); padding:8px 16px; border-radius:2px; font-size:14px;
    text-decoration:none; white-space:nowrap;
  }
  @media (max-width: 720px){ nav ul{ display:none; } }

  /* ---------- Hero ---------- */
  .hero{ padding:88px 0 64px 0; }
  .hero-grid{ display:grid; grid-template-columns: 1.05fr 0.95fr; gap:64px; align-items:center; }
  @media (max-width: 900px){ .hero-grid{ grid-template-columns:1fr; } }
  .hero h1{ font-size:clamp(34px, 5vw, 52px); line-height:1.08; }
  .hero .lede{ margin-top:20px; }
  .cta-row{ display:flex; gap:14px; margin-top:34px; flex-wrap:wrap; }
  .btn{
    display:inline-block; padding:13px 22px; border-radius:2px; font-size:14.5px;
    text-decoration:none; font-weight:600; border:1px solid transparent; cursor:pointer;
  }
  .btn-primary{ background:var(--ink); color:var(--paper); }
  .btn-primary:hover{ background:#0D1A1F; }
  .btn-ghost{ border-color:var(--ink); color:var(--ink); }
  .btn-ghost:hover{ background:var(--paper-alt); }

  /* ---------- Signature: sentence transformation ---------- */
  .transform-card{
    background:var(--paper-alt); border:1px solid var(--line); border-radius:4px;
    padding:34px 30px; position:relative; overflow:hidden;
  }
  .transform-label{ font-family:var(--mono); font-size:11.5px; color:var(--muted); letter-spacing:0.08em; text-transform:uppercase; margin-bottom:18px; }
  .transform-line{ font-family:var(--serif); font-size:21px; line-height:1.5; min-height:56px; }
  .rough{ color:#8A6A55; }
  .rough .strike{
    text-decoration: line-through solid #B5433A 2px;
    text-decoration-skip-ink: none;
    opacity:0.75;
  }
  .divider-arrow{ font-family:var(--mono); color:var(--gold); font-size:14px; margin:14px 0; letter-spacing:0.1em; }
  .polished{ color:var(--ink); font-style:italic; opacity:0; transform:translateY(6px); transition:opacity .7s ease, transform .7s ease; }
  .transform-card.revealed .polished{ opacity:1; transform:translateY(0); }
  .transform-card.revealed .rough{ opacity:0.55; }
  .polished .accent{ color:var(--gold); font-style:normal; font-weight:600; }

  @media (prefers-reduced-motion: reduce){
    .polished{ transition:none; opacity:1; transform:none; }
  }

  /* ---------- Differentiators ---------- */
  .diffs{ border-top:1px solid var(--line); border-bottom:1px solid var(--line); background:var(--paper-alt); }
  .diff-grid{ display:grid; grid-template-columns:repeat(4, 1fr); gap:36px; }
  .focus-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(210px, 1fr)); gap:36px; }
  .tag-row{ display:flex; flex-wrap:wrap; gap:12px; margin-top:24px; }
  .tag-pill{
    background:var(--paper); border:1px solid var(--line); border-radius:20px;
    padding:9px 18px; font-size:14.5px; color:var(--ink-soft); font-family:var(--sans);
  }
  @media (max-width:900px){ .diff-grid{ grid-template-columns:repeat(2,1fr); } }
  .diff h3{ font-family:var(--sans); font-size:15.5px; font-weight:700; margin-bottom:8px; }
  .diff p{ font-size:14.5px; color:var(--muted); margin:0; }
  .diff .mark{ font-family:var(--mono); color:var(--gold); font-size:13px; margin-bottom:10px; display:block; }

  /* ---------- Programs ---------- */
  .section-head{ margin-bottom:48px; max-width:60ch; }
  .section-head h2{ font-size:clamp(26px,3.4vw,34px); margin-top:6px; }
  .card-grid{ display:grid; grid-template-columns:1fr 1fr; gap:28px; }
  @media (max-width:820px){ .card-grid{ grid-template-columns:1fr; } }
  .prog-card{
    border:1px solid var(--line); border-radius:4px; padding:34px 30px; background:var(--paper);
    display:flex; flex-direction:column;
  }
  .prog-card h3{ font-size:22px; margin-bottom:6px; }
  .prog-tag{ font-family:var(--mono); font-size:12px; color:var(--teal); letter-spacing:0.06em; text-transform:uppercase; margin-bottom:16px; }
  .prog-card ul{ padding-left:18px; margin:18px 0 26px 0; color:var(--ink-soft); font-size:15px; }
  .prog-card li{ margin-bottom:8px; }
  .prog-card .btn{ margin-top:auto; align-self:flex-start; }

  /* ---------- How it works ---------- */
  .steps{ counter-reset:step; }
  .step{
    display:grid; grid-template-columns:64px 1fr; gap:22px; padding:26px 0; border-top:1px solid var(--line);
  }
  .step:last-child{ border-bottom:1px solid var(--line); }
  .step-num{
    font-family:var(--serif); font-size:28px; color:var(--gold); font-style:italic;
  }
  .step h3{ font-family:var(--sans); font-size:17px; font-weight:700; margin-bottom:6px; }
  .step p{ margin:0; color:var(--muted); font-size:15px; max-width:62ch; }

  /* ---------- About ---------- */
  .about-grid{ display:grid; grid-template-columns:220px 1fr; gap:48px; align-items:start; }
  @media (max-width:720px){ .about-grid{ grid-template-columns:1fr; } }
  .avatar{
    width:100%; border-radius:6px; overflow:hidden;
    box-shadow:0 1px 3px rgba(22,38,46,0.12);
  }
  .avatar img{ width:100%; height:auto; display:block; }
  .credentials{ list-style:none; padding:0; margin:22px 0 0 0; font-size:14px; color:var(--muted); }
  .credentials li{ padding:8px 0; border-top:1px solid var(--line); }

  /* ---------- Proof strip ---------- */
  .proof{ background:var(--ink); color:var(--paper); }
  .proof .section-head h2{ color:var(--paper); }
  .proof .lede{ color:#C7D3D0; }
  .stat-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; margin-top:40px; }
  @media (max-width:720px){ .stat-grid{ grid-template-columns:1fr; } }
  .stat{ border-top:1px solid #2E3E43; padding-top:18px; }
  .stat .num{ font-family:var(--serif); font-size:38px; color:var(--gold-soft); }
  .stat .lab{ font-size:14px; color:#9FB0AC; margin-top:6px; }

  /* ---------- Contact ---------- */
  .contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:56px; }
  @media (max-width:820px){ .contact-grid{ grid-template-columns:1fr; } }
  form{ display:flex; flex-direction:column; gap:16px; }
  label{ font-size:13px; font-weight:600; color:var(--ink-soft); margin-bottom:6px; display:block; }
  input, textarea, select{
    width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:2px;
    font-family:var(--sans); font-size:15px; background:var(--paper); color:var(--ink);
  }
  input:focus, textarea:focus, select:focus{ outline:2px solid var(--teal); outline-offset:1px; }
  textarea{ min-height:120px; resize:vertical; }
  .form-status{ font-size:14px; color:var(--teal); min-height:20px; }
  .direct-contact{ font-size:15px; color:var(--ink-soft); }
  .direct-contact a{ color:var(--teal); text-decoration:none; border-bottom:1px solid var(--teal); }
  .direct-contact .row{ margin-bottom:14px; }
  .direct-contact .k{ font-family:var(--mono); font-size:12px; color:var(--muted); text-transform:uppercase; letter-spacing:0.06em; display:block; margin-bottom:4px; }

  /* ---------- Footer ---------- */
  footer{ border-top:1px solid var(--line); padding:36px 0; }
  .foot-row{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:13.5px; color:var(--muted); }

  /* ---------- Reveal on scroll ---------- */
  .reveal{ opacity:0; transform:translateY(14px); transition:opacity .6s ease, transform .6s ease; }
  .reveal.in{ opacity:1; transform:translateY(0); }
  @media (prefers-reduced-motion: reduce){
    .reveal{ opacity:1; transform:none; transition:none; }
  }

  /* ---------- WhatsApp floating tab ---------- */
  .whatsapp-fab{
    position:fixed; right:24px; bottom:24px; z-index:60;
    width:56px; height:56px; border-radius:50%; background:#25D366;
    display:flex; align-items:center; justify-content:center;
    box-shadow:0 4px 14px rgba(0,0,0,0.28); text-decoration:none;
    transition: transform .18s ease, box-shadow .18s ease;
  }
  .whatsapp-fab:hover{ transform:scale(1.07); box-shadow:0 6px 18px rgba(0,0,0,0.32); }
  .whatsapp-fab svg{ width:28px; height:28px; }
  @media (max-width:480px){
    .whatsapp-fab{ right:16px; bottom:16px; width:50px; height:50px; }
    .whatsapp-fab svg{ width:24px; height:24px; }
  }

  /* ---------- Testimonials carousel (inside the dark Proof section) ---------- */
  .testimonial-carousel-wrap{ margin-top:48px; }
  .testimonial-carousel{
    position:relative; border-top:1px solid #2E3E43; padding-top:28px;
    min-height:300px; overflow:hidden;
  }
  .testimonial-card{
    position:absolute; top:28px; left:0; width:100%; padding-bottom:8px;
    transform:translateX(110%); opacity:0;
    transition: transform .6s ease, opacity .6s ease;
  }
  .testimonial-card.active{ transform:translateX(0); opacity:1; position:relative; }
  .testimonial-card.exiting{ transform:translateX(-110%); opacity:0; position:absolute; }
  .testimonial-mark{ font-family:var(--serif); font-size:44px; color:var(--gold-soft); line-height:0.5; display:block; margin-bottom:6px; }
  .testimonial-quote{
    font-family:var(--serif); font-style:italic; font-size:18px; line-height:1.65;
    color:#F1F2EE; max-width:72ch; margin:0;
  }
  .testimonial-who{ margin-top:16px; font-size:14px; color:#9FB0AC; }
  .testimonial-who strong{ color:var(--gold-soft); font-weight:600; }
  .carousel-dots{ display:flex; gap:10px; margin-top:22px; }
  .carousel-dots .dot{
    width:9px; height:9px; border-radius:50%; background:#3E4E53; border:none; padding:0;
    cursor:pointer; transition: background .25s ease, transform .25s ease;
  }
  .carousel-dots .dot.active{ background:var(--gold-soft); transform:scale(1.2); }
  @media (max-width:720px){
    .testimonial-carousel{ min-height:420px; }
  }
  @media (prefers-reduced-motion: reduce){
    .testimonial-card{ transition:none; }
  }  /* ---------- English-level quiz ---------- */
  .quiz-card{
    max-width:760px; margin:0 auto; background:var(--paper); border:1px solid var(--line);
    border-radius:6px; padding:40px 36px;
  }
  .quiz-progress{ margin-bottom:26px; }
  .quiz-progress span{ font-family:var(--mono); font-size:12px; color:var(--muted); letter-spacing:0.06em; text-transform:uppercase; }
  .quiz-progress-track{ height:4px; background:var(--line); border-radius:2px; margin-top:8px; overflow:hidden; }
  .quiz-progress-fill{ height:100%; background:var(--gold); width:20%; transition:width .4s ease; }
  .quiz-prompt{ font-family:var(--serif); font-size:20px; margin:0 0 18px 0; }
  .quiz-options{ display:flex; flex-direction:column; gap:12px; }
  .quiz-option{
    text-align:left; width:100%; padding:16px 18px; border:1px solid var(--line); border-radius:4px;
    background:var(--paper); font-family:var(--sans); font-size:15.5px; color:var(--ink);
    cursor:pointer; transition:border-color .2s ease, background .2s ease;
  }
  .quiz-option:hover:not(:disabled){ border-color:var(--teal); background:var(--paper-alt); }
  .quiz-option:disabled{ cursor:default; }
  .quiz-option.correct{ border-color:var(--teal); background:#EAF2F0; color:var(--teal); font-weight:600; }
  .quiz-option.incorrect{ border-color:#B5433A; background:#FBEEEC; color:#8A3A32; }
  .quiz-feedback{ font-size:14.5px; color:var(--muted); min-height:22px; margin:16px 0 6px 0; }
  .quiz-score-label{ font-family:var(--mono); font-size:12px; color:var(--muted); text-transform:uppercase; letter-spacing:0.06em; margin:0; }
  .quiz-score{ font-family:var(--serif); font-size:52px; color:var(--ink); margin:6px 0 18px 0; }
  .quiz-tier{ font-family:var(--sans); font-size:18px; font-weight:700; color:var(--teal); margin:0 0 10px 0; }
  .quiz-tier-body{ color:var(--ink-soft); font-size:15.5px; max-width:56ch; margin:0 0 28px 0; }
  .quiz-breakdown{ font-family:var(--mono); font-size:13.5px; color:var(--ink-soft); margin:0 0 10px 0; }
  .quiz-disclaimer{ font-size:12.5px; color:var(--muted); font-style:italic; margin:0 0 26px 0; }
  @media (max-width:600px){
    .quiz-card{ padding:28px 22px; }
  }