:root{
    --paper:#F6F8FA;
    --paper-line:#CBDBEA;
    --paper-line-soft:#E1EBF3;
    --ink:#10263D;
    --ink-soft:#3C5872;
    --blue-deep:#0F2E4C;
    --blue-deep2:#123A5E;
    --blue-mid:#2F6690;
    --blue-bright:#4C8FC0;
    --orange:#FF6B35;
    --orange-dark:#E6551F;
    --yellow:#FFC145;
    --white:#FFFFFF;
    --radius:2px;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--paper);
    color:var(--ink);
    font-family:'Inter', sans-serif;
    line-height:1.55;
  }
  h1,h2,h3,h4{ font-family:'Space Grotesk', sans-serif; color:var(--ink); font-weight:600; letter-spacing:-0.01em;}
  .mono{ font-family:'IBM Plex Mono', monospace; }
  a{ color:inherit; text-decoration:none; }
  img{max-width:100%; display:block;}
  .wrap{ max-width:1120px; margin:0 auto; padding:0 28px; }
  .eyebrow{
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    letter-spacing:.12em;
    text-transform:uppercase;
    color:var(--blue-mid);
    display:flex; align-items:center; gap:8px;
    margin-bottom:14px;
  }
  .eyebrow::before{ content:''; width:18px; height:1px; background:var(--blue-mid); display:inline-block; }
  button{ font-family:inherit; cursor:pointer; }

  /* corner crop marks used on cards / hero */
  .crop{
    position:relative;
    border:1px solid var(--paper-line);
    background:var(--white);
  }
  .crop::before,.crop::after,
  .crop .cA, .crop .cB { position:absolute; width:10px; height:10px; pointer-events:none; }
  .crop::before{ content:''; top:-1px; left:-1px; border-top:2px solid var(--blue-mid); border-left:2px solid var(--blue-mid); }
  .crop::after{ content:''; top:-1px; right:-1px; border-top:2px solid var(--blue-mid); border-right:2px solid var(--blue-mid); }
  .crop .cA{ bottom:-1px; left:-1px; border-bottom:2px solid var(--blue-mid); border-left:2px solid var(--blue-mid); }
  .crop .cB{ bottom:-1px; right:-1px; border-bottom:2px solid var(--blue-mid); border-right:2px solid var(--blue-mid); }

  /* ---------- NAV ---------- */
  header{
    position:sticky; top:0; z-index:100;
    background:rgba(246,248,250,0.92);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--paper-line);
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    padding:16px 28px;
    max-width:1120px; margin:0 auto;
  }
  .brand{ display:flex; align-items:center; gap:10px; }
  .brand-mark{
    width:106px; height:106px;
    display:block; object-fit:contain;
    background:transparent; border:none;
  }
  .brand-name{ font-family:'Space Grotesk', sans-serif; font-weight:700; font-size:20px; letter-spacing:-0.01em; }
  .brand-name span{ color:var(--blue-mid); }
  nav.links{ display:flex; gap:4px; align-items:center; }
  nav.links button.navlink{
    background:none; border:none; padding:12px 18px;
    font-family:'IBM Plex Mono', monospace; font-size:15px; letter-spacing:.05em; text-transform:uppercase;
    color:var(--ink-soft); border-bottom:3px solid transparent;
  }
  nav.links button.navlink:hover{ color:var(--blue-deep); }
  nav.links button.navlink.active{ color:var(--blue-deep); border-bottom:3px solid var(--orange); }
  .nav-cta{
    background:var(--blue-deep); color:var(--white); border:none;
    padding:10px 18px; font-family:'IBM Plex Mono', monospace; font-size:12px; letter-spacing:.05em; text-transform:uppercase;
  }
  .nav-cta:hover{ background:var(--orange-dark); }
  .burger{ display:none; background:none; border:1px solid var(--paper-line); width:38px; height:38px; }
  .burger span{ display:block; width:16px; height:1.5px; background:var(--ink); margin:3px auto; }

  /* ---------- HERO ---------- */
  .hero{
    background-color:var(--blue-deep2);
    background-image:
      linear-gradient(180deg, rgba(15,46,76,0.55), rgba(15,46,76,0.72)),
      url('images/front_1.jpg');
    background-size: cover, cover;
    background-position: center, center;
    background-repeat: no-repeat, no-repeat;
    color:var(--white);
    padding:88px 0 76px;
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--blue-deep);
  }
  .hero .wrap{ display:block; }
  .hero .eyebrow{ color:var(--yellow); }
  .hero .eyebrow::before{ background:var(--yellow); }
  .hero h1{ color:var(--white); font-size:46px; line-height:1.08; margin-bottom:20px; max-width:640px;}
  .hero p.lead{ color:#C7D9E8; font-size:16.5px; max-width:520px; margin-bottom:30px; }
  .hero .cta-row{ display:flex; gap:14px; flex-wrap:wrap; }
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    padding:13px 22px; font-family:'IBM Plex Mono', monospace; font-size:12.5px; letter-spacing:.06em; text-transform:uppercase;
    border:1px solid transparent;
  }
  .btn-primary{ background:var(--orange); color:var(--white); }
  .btn-primary:hover{ background:var(--orange-dark); }
  .btn-outline{ border:1px solid rgba(255,255,255,0.5); color:var(--white); }
  .btn-outline:hover{ border-color:var(--white); background:rgba(255,255,255,0.08); }
  .btn-outline-dark{ border:1px solid var(--blue-deep); color:var(--blue-deep); }
  .btn-outline-dark:hover{ background:var(--blue-deep); color:var(--white); }

  .dim-label{ font-family:'IBM Plex Mono', monospace; font-size:10.5px; letter-spacing:.05em; fill:#8FB6D6; }

  /* ---------- SECTIONS ---------- */
  section{ padding:78px 0; }
  .section-head{ max-width:640px; margin-bottom:44px; }
  .section-head h2{ font-size:32px; margin-bottom:14px; }
  .section-head p{ color:var(--ink-soft); font-size:15.5px; }


  /* course grid */
  .course-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
  .course-card{ padding:22px; }
  .course-card .fig{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--blue-mid); margin-bottom:14px; letter-spacing:.05em;}
  .course-icon{ width:44px; height:44px; margin-bottom:16px; }
  .course-card h3{ font-size:19px; margin-bottom:8px; }
  .course-card p.desc{ font-size:13.5px; color:var(--ink-soft); margin-bottom:16px; }
  .spec-list{ list-style:none; border-top:1px dashed var(--paper-line); padding-top:12px; }
  .spec-list li{ display:flex; justify-content:space-between; font-family:'IBM Plex Mono', monospace; font-size:11.5px; color:var(--ink-soft); padding:4px 0; }
  .spec-list li b{ color:var(--ink); font-weight:600; }
  .course-link{ margin-top:16px; display:inline-block; font-family:'IBM Plex Mono', monospace; font-size:11.5px; letter-spacing:.05em; text-transform:uppercase; color:var(--blue-deep); border-bottom:1px solid var(--orange); padding-bottom:2px; background:none; border-left:none; border-right:none; border-top:none; cursor:pointer; }

  /* course listing rows (Courses page) */
  .course-row{
    display:flex; width:100%; align-items:stretch; text-align:left;
    background:transparent; cursor:pointer; padding:0; margin-bottom:96px;
    font-family:inherit; color:inherit; border:none; outline:none;
  }
  .course-row.reversed{ flex-direction:row-reverse; }
  .course-row:last-child{ margin-bottom:0; }
  .course-row:focus-visible{ outline:2px solid var(--blue-mid); outline-offset:2px; }
  .course-row-media{ flex:0 0 42%; min-height:220px; overflow:hidden; }
  .course-row-media img{ width:100%; height:100%; object-fit:cover; display:block; }
  .course-row-body{ flex:1; padding:26px 30px; display:flex; flex-direction:column; justify-content:center; }
  .course-row-body .fig{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--blue-mid); margin-bottom:10px; letter-spacing:.05em; }
  .course-row-body h3{ font-size:32px; margin-bottom:12px; }
  .course-row-body p.desc{ font-size:18px; color:var(--ink-soft); margin-bottom:16px; max-width:460px; }
  .course-row-body .spec-list{ max-width:320px; }
  .course-row-body .spec-list li{ font-size:14px; }
  .course-row:hover .course-link{ color:var(--orange-dark); }

  /* course detail page */
  .detail-grid{ display:grid; grid-template-columns:0.9fr 1.1fr; gap:44px; align-items:start; }
  .detail-grid .spec-list li{ font-size:15px; }
  .detail-media{ overflow:hidden; padding:0; }
  .detail-media img{ width:100%; height:auto; display:block; }
  .masonry-grid{ column-count:2; column-gap:14px; }
  .masonry-grid img{ width:100%; display:block; margin-bottom:14px; break-inside:avoid; -webkit-column-break-inside:avoid; }

  /* dark banner */
  .banner{ background:var(--blue-deep2); color:var(--white); padding:64px 0; text-align:center; }
  .banner h2{ color:var(--white); font-size:28px; margin-bottom:12px; }
  .banner p{ color:#C7D9E8; margin-bottom:26px; max-width:520px; margin-left:auto; margin-right:auto; font-size:15px; }

  /* grand opening callout */
  .grand-opening{ padding:64px 0; }
  .grand-opening-box{
    background:#FFF8F2; color:var(--ink);
    border:2px solid var(--orange);
    padding:48px 40px; text-align:center;
    max-width:720px; margin:0 auto;
  }
  .grand-opening-box h2{ color:var(--blue-deep); font-family:'IBM Plex Mono', monospace; font-size:14px; text-transform:uppercase; letter-spacing:.08em; margin-bottom:14px; font-weight:600; }
  .grand-opening-box h3{ color:var(--blue-deep); font-size:28px; margin-bottom:16px; font-weight:600; }
  .grand-opening-box p{ color:var(--ink-soft); max-width:560px; margin:0 auto; font-size:15px; }

  .price-feats{ list-style:none; margin-bottom:22px; flex-grow:1; }
  .price-feats li{ font-size:13px; color:var(--ink-soft); padding:6px 0; border-top:1px dashed var(--paper-line); display:flex; gap:8px;}
  .price-feats li:first-child{ border-top:none; }
  .price-feats li::before{ content:'—'; color:var(--blue-mid); }

  /* team */
  .team-profile{ display:flex; gap:36px; align-items:flex-start; padding:40px 0; border-top:1px solid var(--paper-line); }
  .team-profile:first-child{ border-top:none; padding-top:0; }
  .team-photo{ flex:0 0 220px; width:220px; height:260px; overflow:hidden; }
  .team-photo img{ width:100%; height:100%; object-fit:cover; display:block; }
  .team-profile h3{ font-size:22px; margin-bottom:4px; }
  .team-role{ font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--orange-dark); text-transform:uppercase; letter-spacing:.05em; margin-bottom:16px; }
  .team-profile p.bio{ font-size:14.5px; color:var(--ink-soft); max-width:640px; line-height:1.65; }

  /* contact */
  .contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:start; }
  .info-block{ padding:28px; }
  .info-row{ display:flex; gap:14px; padding:14px 0; border-top:1px dashed var(--paper-line); }
  .info-row:first-child{ border-top:none; }
  .info-row .label{ font-family:'IBM Plex Mono', monospace; font-size:11px; text-transform:uppercase; letter-spacing:.05em; color:var(--blue-mid); width:90px; flex-shrink:0; padding-top:2px;}
  .info-row .val{ font-size:14px; color:var(--ink); }

  form.contact-form{ padding:28px; }
  .field{ margin-bottom:18px; }
  .field label{ display:block; font-family:'IBM Plex Mono', monospace; font-size:11px; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-soft); margin-bottom:7px; }
  .field input, .field select, .field textarea{
    width:100%; border:1px solid var(--paper-line); background:var(--paper);
    padding:11px 12px; font-family:'Inter', sans-serif; font-size:14px; color:var(--ink);
  }
  .field input:focus, .field select:focus, .field textarea:focus{ outline:2px solid var(--blue-mid); outline-offset:1px; }
  .field input.field-invalid, .field select.field-invalid, .field textarea.field-invalid{ border-color:#D64545; }
  .field-error{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:#D64545; margin-top:6px; }
  .two-col{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
  .submit-btn{ background:var(--blue-deep); color:var(--white); border:none; padding:13px 26px; font-family:'IBM Plex Mono', monospace; font-size:12.5px; text-transform:uppercase; letter-spacing:.06em; width:100%; }
  .submit-btn:hover{ background:var(--orange-dark); }
  .form-success{ display:none; padding:16px; border:1px solid var(--blue-mid); background:#EAF2F8; font-size:13.5px; color:var(--blue-deep); margin-top:14px; font-family:'IBM Plex Mono', monospace; }
  .form-error{ display:none; padding:16px; border:1px solid #D64545; background:#FBEAEA; font-size:13.5px; color:#B23A3A; margin-top:14px; font-family:'IBM Plex Mono', monospace; }

  /* footer */
  footer{ background:var(--blue-deep2); color:#AFC7DC; padding:44px 0 28px; margin-top:0; }
  .footer-grid{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:30px; margin-bottom:30px; }
  .footer-brand{ color:var(--white); font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:16px; margin-bottom:8px;}
  footer .cols{ display:flex; gap:56px; flex-wrap:wrap; }
  footer .col h5{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--yellow); text-transform:uppercase; letter-spacing:.06em; margin-bottom:12px; }
  footer .col a, footer .col p{ display:block; font-size:13px; color:#AFC7DC; margin-bottom:8px; }
  footer .col a:hover{ color:var(--white); }
  .footer-bottom{ border-top:1px solid rgba(255,255,255,0.12); padding-top:18px; font-family:'IBM Plex Mono', monospace; font-size:11px; color:#7B99B4; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}

  .page{ display:none; }
  .page.active{ display:block; }

  @media (max-width: 880px){
    .hero h1{ font-size:34px; }
    .course-grid{ grid-template-columns:1fr 1fr; }
    .team-profile{ flex-wrap:wrap; }
    .contact-grid{ grid-template-columns:1fr; }
    .two-col{ grid-template-columns:1fr; }
    .detail-grid{ grid-template-columns:1fr; }
    nav.links{ display:none; }
    .burger{ display:block; }
    .nav-cta{ display:none; }
  }
  @media (max-width: 880px){
    nav.links.open{
      display:flex; flex-direction:column; position:absolute; top:66px; left:0; right:0;
      background:var(--paper); border-bottom:1px solid var(--paper-line); padding:8px 0;
    }
    nav.links.open button.navlink{ text-align:left; padding:14px 28px; width:100%; }
  }
  @media (max-width: 620px){
    .course-grid{ grid-template-columns:1fr; }
    .team-photo{ width:100%; height:220px; }
    .course-row, .course-row.reversed{ flex-direction:column; }
    .course-row-media{ min-height:200px; }
  }
  @media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }