:root{
    --paper: #F1EFE4;
    --paper-dim: #E7E3D4;
    --ink: #1F2E24;
    --ink-soft: #4A5A4E;
    --route: #C1622D;
    --route-soft: #E0A47E;
    --waypoint: #3C5A6E;
    --hairline: #C9C2AC;
    --deep: #16211B;
    --deep-soft: #223328;
  }

  *{ box-sizing: border-box; }
  html{ scroll-behavior: smooth; }
  body{
    margin:0;
    background: var(--paper);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
  }
  h1,h2,h3{
    font-family: Georgia, 'Iowan Old Style', 'Palatino Linotype', serif;
    font-weight: 500;
    line-height: 1.12;
    margin: 0;
    letter-spacing: -0.01em;
  }
  p{ margin:0; }
  a{ color: inherit; text-decoration: none; }
  button{ font-family: inherit; cursor: pointer; }
  img,svg{ display:block; max-width:100%; }

  .wrap{
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 32px;
  }

  :focus-visible{
    outline: 2px solid var(--route);
    outline-offset: 3px;
  }

  @media (prefers-reduced-motion: reduce){
    *{ animation: none !important; transition: none !important; }
  }

  /* ---------- Nav ---------- */
  .nav{
    position: sticky; top:0; z-index: 50;
    background: rgba(241,239,228,0.88);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--hairline);
  }
  .nav .wrap{
    display:flex; align-items:center; justify-content:space-between;
    height: 76px;
  }
  .logo{ display:flex; align-items:center; gap:10px; font-family:Georgia, 'Iowan Old Style', 'Palatino Linotype', serif; font-size: 18px; font-weight:600; white-space: nowrap; }
  .logo-img{
    height: 46px;
    width: auto;
    display: block;
    mix-blend-mode: multiply;
  }
  .logo-img-footer{ height: 40px; }
  .logo svg{ width: 26px; height: 26px; }
  .nav-links{ display:flex; align-items:center; gap: 36px; }
  .nav-links a{ font-size: 14.5px; color: var(--ink-soft); }
  .nav-links a:hover{ color: var(--ink); }
  .nav-cta{ display:flex; align-items:center; gap:20px; }
  .btn{
    display:inline-flex; align-items:center; justify-content:center;
    padding: 11px 22px;
    border-radius: 3px;
    font-size: 14.5px; font-weight: 600;
    border: 1px solid transparent;
    transition: transform .15s ease, background .15s ease, border-color .15s ease;
  }
  .btn-primary{ background: var(--ink); color: var(--paper); }
  .btn-primary:hover{ background: var(--deep-soft); transform: translateY(-1px); }
  .btn-route{ background: var(--route); color: var(--paper); }
  .btn-route:hover{ background: #a9501f; transform: translateY(-1px); }
  .btn-ghost{ border-color: var(--ink); color: var(--ink); background: transparent; }
  .btn-ghost:hover{ background: var(--ink); color: var(--paper); }
  .nav-signin{ font-size: 14.5px; color: var(--ink-soft); }
  @media (max-width: 860px){
    .nav-links{ display:none; }
  }

  /* ---------- Hero ---------- */
  .hero{
    padding: 88px 0 60px;
    position: relative;
    overflow: hidden;
  }
  .hero .wrap{
    display:grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 40px;
    align-items:center;
  }
  .hero-copy h1{
    font-size: clamp(34px, 4.4vw, 54px);
    max-width: 12ch;
  }
  .hero-copy p.lede{
    margin-top: 22px;
    font-size: 18px;
    color: var(--ink-soft);
    max-width: 46ch;
  }
  .hero-actions{
    margin-top: 34px;
    display:flex; align-items:center; gap: 18px; flex-wrap: wrap;
  }
  .hero-note{
    margin-top: 26px;
    font-size: 13.5px;
    color: var(--ink-soft);
    display:flex; align-items:center; gap:8px;
  }
  .hero-note .dot{ width:6px; height:6px; border-radius:50%; background: var(--route); }

  .map-wrap{ position:relative; }
  .contours{ position:absolute; inset: -40px -20px; z-index:0; opacity:.5; }
  .map-wrap svg.route-illustration{ position:relative; z-index:1; }

  .route-line{
    fill:none; stroke: var(--route); stroke-width: 3; stroke-linecap: round;
  }
  .route-illustration .node circle{ fill: var(--paper); stroke: var(--waypoint); stroke-width: 2.5; }
  .route-illustration .node.active circle{ fill: var(--route); stroke: var(--route); }
  .route-illustration .node text{ font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; font-size: 13px; fill: var(--ink); font-weight:600; }
  .route-illustration .node .sub{ font-size: 11px; fill: var(--ink-soft); font-weight: 500; }

  .route-draw{
    stroke-dasharray: 900;
    stroke-dashoffset: 900;
    animation: draw 1.8s ease-out .3s forwards;
  }
  @keyframes draw{ to{ stroke-dashoffset: 0; } }

  /* ---------- Builder ---------- */
  .builder{ padding: 30px 0 90px; }
  .builder-card{
    border: 1px solid var(--hairline);
    border-radius: 4px;
    background: var(--paper);
    padding: 44px;
  }
  .builder-card h2{ font-size: clamp(24px,2.6vw,30px); }
  .builder-card > p{ margin-top: 10px; color: var(--ink-soft); font-size: 15.5px; max-width: 50ch; }
  .builder-form{ display:flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
  .builder-form input{
    flex: 1 1 340px;
    padding: 14px 16px;
    border: 1px solid var(--hairline);
    border-radius: 3px;
    background: var(--paper-dim);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    font-size: 15px;
    color: var(--ink);
  }
  .builder-form input:focus{ outline: 2px solid var(--route); outline-offset: 1px; }
  .builder-error{ margin-top: 14px; font-size: 14px; color: #a9501f; }

  .builder-loading{ text-align:center; padding: 70px 20px; }
  .spinner{
    width: 34px; height: 34px; margin: 0 auto 22px;
    border-radius: 50%;
    border: 3px solid var(--hairline);
    border-top-color: var(--route);
    animation: spin 0.9s linear infinite;
  }
  @keyframes spin{ to{ transform: rotate(360deg); } }
  .builder-loading p{ color: var(--ink-soft); font-size: 14.5px; }

  .course-header{ display:flex; align-items:baseline; justify-content:space-between; gap: 20px; flex-wrap: wrap; }
  .course-header h3{ font-family:Georgia, 'Iowan Old Style', 'Palatino Linotype', serif; font-size: 26px; }
  .btn-small{ padding: 8px 16px; font-size: 13px; }

  .progress-wrap{ margin-top: 24px; }
  .progress-bar{ height: 8px; border-radius: 4px; background: var(--paper-dim); border: 1px solid var(--hairline); overflow:hidden; }
  .progress-fill{ height:100%; width:0%; background: var(--route); transition: width .5s ease; }
  .progress-label{ margin-top: 9px; font-size: 13.5px; color: var(--ink-soft); }

  .badges-shelf{ display:flex; gap: 18px; margin-top: 28px; flex-wrap: wrap; }
  .badge{ display:flex; flex-direction:column; align-items:center; gap:8px; width: 84px; text-align:center; }
  .badge-icon{
    width: 52px; height:52px; border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    border: 2px solid var(--hairline);
    background: var(--paper-dim);
    color: var(--ink-soft);
    font-family:Georgia, 'Iowan Old Style', 'Palatino Linotype', serif; font-size:19px;
    transition: transform .3s ease, border-color .3s ease, color .3s ease, background .3s ease;
  }
  .badge.earned .badge-icon{
    border-color: var(--route);
    background: var(--route);
    color: var(--paper);
    transform: scale(1.05);
  }
  .badge-label{ font-size: 11.5px; color: var(--ink-soft); line-height:1.3; }

  .modules-list{ margin-top: 36px; display:flex; flex-direction:column; gap: 30px; }
  .module-block h4{ font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; font-size: 15px; font-weight:600; color: var(--waypoint); margin-bottom: 14px; }
  .lesson{
    border: 1px solid var(--hairline);
    border-radius: 3px;
    padding: 18px 20px;
    margin-bottom: 10px;
    background: var(--paper);
  }
  .lesson-main{ display:flex; align-items:flex-start; gap:14px; }
  .lesson-status{
    width: 20px; height:20px; border-radius:50%;
    border: 2px solid var(--hairline);
    flex-shrink:0; margin-top:2px;
    transition: background .25s ease, border-color .25s ease;
  }
  .lesson.done .lesson-status{ background: var(--route); border-color: var(--route); }
  .lesson-title{ font-size: 15.5px; font-weight:600; }
  .lesson-summary{ font-size: 13.5px; color: var(--ink-soft); margin-top:3px; }
  .lesson-actions{ display:flex; gap: 14px; margin-top: 14px; margin-left: 34px; flex-wrap: wrap; align-items:center; }
  .lesson-video{ font-size: 13.5px; font-weight:600; color: var(--waypoint); border-bottom: 1.5px solid var(--waypoint); padding-bottom:1px; }
  .btn-check{
    font-size: 13px; font-weight:600; padding: 8px 14px;
    border: 1px solid var(--ink); border-radius:3px; background:transparent; color: var(--ink);
  }
  .btn-check:hover{ background: var(--ink); color: var(--paper); }
  .lesson.done .btn-check{ border-color: var(--hairline); color: var(--ink-soft); }
  .lesson-done-tag{ font-size: 13px; font-weight:600; color: var(--route); }

  .quiz-panel{ margin: 16px 0 0 34px; padding: 16px 18px; background: var(--paper-dim); border-radius: 3px; }
  .quiz-question{ font-size: 14.5px; font-weight:600; }
  .quiz-options{ margin-top: 12px; display:flex; flex-direction:column; gap:8px; }
  .quiz-option{
    text-align:left; padding: 9px 12px; border: 1px solid var(--hairline); border-radius:3px;
    background: var(--paper); font-size: 14px; color: var(--ink);
  }
  .quiz-option.selected{ border-color: var(--waypoint); background: #E3E9EA; }
  .quiz-option.correct{ border-color: var(--route); background: #F2DCC9; }
  .quiz-option.incorrect{ border-color: #a9501f; background: #F2DCC9; opacity:.7; }
  .btn-submit-quiz{
    margin-top: 12px; font-size: 13px; font-weight:600; padding: 8px 16px;
    background: var(--route); color: var(--paper); border:none; border-radius:3px;
  }
  .btn-submit-quiz:disabled{ opacity:.5; cursor:not-allowed; }
  .quiz-feedback{ margin-top: 10px; font-size: 13.5px; font-weight:600; }
  .quiz-feedback.correct{ color: var(--route); }
  .quiz-feedback.incorrect{ color: #a9501f; }

  /* ---------- Modes ---------- */
  .modes{ padding: 30px 0 100px; }
  .section-head{ max-width: 640px; margin-bottom: 52px; }
  .section-head h2{ font-size: clamp(28px, 3vw, 38px); }
  .section-head p{ margin-top: 14px; font-size: 17px; color: var(--ink-soft); max-width: 56ch; }

  .mode-grid{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border: 1px solid var(--hairline);
    border-radius: 4px;
    overflow:hidden;
  }
  .mode-card{
    padding: 44px 40px;
    background: var(--paper);
  }
  .mode-card + .mode-card{ border-left: 1px solid var(--hairline); }
  .mode-card .mode-tag{ font-size: 13.5px; color: var(--waypoint); font-weight:600; }
  .mode-card h3{ font-size: 25px; margin-top: 12px; }
  .mode-card p{ margin-top: 14px; color: var(--ink-soft); font-size: 15.5px; max-width: 40ch; }
  .mode-card ul{ margin: 22px 0 0; padding:0; list-style:none; display:flex; flex-direction:column; gap:10px; }
  .mode-card li{ font-size: 14.5px; color: var(--ink); display:flex; gap:10px; align-items:flex-start; }
  .mode-card li::before{ content:''; width:5px; height:5px; margin-top:8px; border-radius:50%; background: var(--route); flex-shrink:0; }
  .mode-card a.mode-link{ display:inline-block; margin-top:26px; font-size:14.5px; font-weight:600; color:var(--ink); border-bottom: 1.5px solid var(--route); padding-bottom:2px; }
  @media (max-width: 780px){
    .mode-grid{ grid-template-columns: 1fr; }
    .mode-card + .mode-card{ border-left:none; border-top:1px solid var(--hairline); }
  }

  /* ---------- How it works ---------- */
  .how{ background: var(--deep); color: var(--paper); padding: 100px 0; }
  .how .section-head p{ color: #B9C3B9; }
  .how .section-head h2{ color: var(--paper); }
  .steps{
    display:grid; grid-template-columns: repeat(4,1fr); gap: 0;
    position: relative;
  }
  .steps::before{
    content:'';
    position:absolute; top: 22px; left: 0; right:0; height:1px;
    background: linear-gradient(to right, transparent, #3C5A6E 6%, #3C5A6E 94%, transparent);
  }
  .step{ padding: 0 26px 0 0; position:relative; }
  .step:first-child{ padding-left:0; }
  .step-num{
    width: 44px; height:44px; border-radius:50%;
    background: var(--deep);
    border: 2px solid var(--route);
    display:flex; align-items:center; justify-content:center;
    font-family:Georgia, 'Iowan Old Style', 'Palatino Linotype', serif; font-size:16px; color: var(--route-soft);
    position:relative; z-index:1;
    margin-bottom: 22px;
  }
  .step h3{ font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; font-size: 17px; font-weight:600; color: var(--paper); }
  .step p{ margin-top:10px; font-size:14.5px; color:#B9C3B9; max-width: 30ch; }
  @media (max-width: 900px){
    .steps{ grid-template-columns: 1fr; row-gap: 40px; }
    .steps::before{ display:none; }
    .step{ padding-right:0; }
  }

  /* ---------- Features ---------- */
  .features{ padding: 100px 0; }
  .feature-grid{
    display:grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
    background: var(--hairline);
    border: 1px solid var(--hairline);
  }
  .feature{ background: var(--paper); padding: 34px 28px; min-height: 190px; display:flex; flex-direction:column; gap:14px; }
  .feature .ico{ width:30px; height:30px; color: var(--waypoint); }
  .feature h3{ font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; font-size:16px; font-weight:600; }
  .feature p{ font-size: 14px; color: var(--ink-soft); }
  @media (max-width: 900px){
    .feature-grid{ grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 560px){
    .feature-grid{ grid-template-columns: 1fr; }
  }

  /* ---------- Quote ---------- */
  .quote{ padding: 60px 0 110px; }
  .quote-inner{
    border-left: 3px solid var(--route);
    padding-left: 32px;
    max-width: 720px;
  }
  .quote-inner p.text{ font-family:Georgia, 'Iowan Old Style', 'Palatino Linotype', serif; font-size: clamp(21px,2.4vw,27px); font-weight:400; color: var(--ink); }
  .quote-inner .attrib{ margin-top: 20px; font-size: 14px; color: var(--ink-soft); }

  /* ---------- Pricing ---------- */
  .pricing{ padding: 40px 0 110px; }
  .price-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
  .price-card{
    border: 1px solid var(--hairline);
    border-radius: 4px;
    padding: 36px 30px;
    background: var(--paper);
    display:flex; flex-direction:column;
  }
  .price-card.highlight{
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
  }
  .price-card .tier{ font-size: 14.5px; font-weight:600; color: var(--waypoint); }
  .price-card.highlight .tier{ color: var(--route-soft); }
  .price-card .amount{ font-family:Georgia, 'Iowan Old Style', 'Palatino Linotype', serif; font-size: 40px; margin-top:14px; }
  .price-card .per{ font-size: 13.5px; color: var(--ink-soft); margin-left:4px; }
  .price-card.highlight .per{ color: #C9D0C7; }
  .price-card ul{ list-style:none; padding:0; margin: 26px 0 0; display:flex; flex-direction:column; gap:11px; flex:1; }
  .price-card li{ font-size:14px; display:flex; gap:9px; }
  .price-card li::before{ content:'—'; color: var(--route); flex-shrink:0; }
  .price-card .btn{ margin-top: 28px; width:100%; }
  @media (max-width: 860px){ .price-grid{ grid-template-columns: 1fr; } }

  /* ---------- CTA band ---------- */
  .cta-band{ background: var(--deep-soft); color: var(--paper); padding: 90px 0; }
  .cta-band .wrap{ display:flex; align-items:center; justify-content:space-between; gap: 40px; flex-wrap:wrap; }
  .cta-band h2{ font-size: clamp(26px,3vw,36px); max-width: 16ch; color: var(--paper); }
  .cta-band-actions{ display:flex; gap:16px; }

  /* ---------- Footer ---------- */
  footer{ padding: 56px 0; border-top: 1px solid var(--hairline); }
  footer .wrap{ display:flex; justify-content:space-between; align-items:flex-start; flex-wrap:wrap; gap:30px; }
  .foot-cols{ display:flex; gap: 70px; flex-wrap:wrap; }
  .foot-col h4{ font-size: 13px; font-weight:600; color: var(--ink-soft); margin-bottom:14px; }
  .foot-col a{ display:block; font-size: 14px; color: var(--ink); padding: 5px 0; }
  .foot-col a:hover{ color: var(--route); }
  .foot-bottom{ font-size: 13px; color: var(--ink-soft); }