:root{
    --paper: #F1F2EB;
    --paper-deep: #E7E9DF;
    --ink: #14181C;
    --ink-soft: #2A2F33;
    --blue: #1F4B7A;
    --blue-deep: #13314F;
    --amber: #D9711F;
    --slate: #5C6670;
    --line: #C7CCC0;
    --line-soft: #DBDED2;
    --white: #FBFBF8;

    --font-display: 'Fraunces', serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-hand: 'Caveat', cursive;

    --max: 1180px;
  }

  *{ box-sizing: border-box; }
  html{ scroll-behavior: smooth; }

  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior: auto; }
    *{ animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  }

  body{
    margin:0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    position: relative;
  }
  body::before{
    content:"";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.035;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  }

  a{ color: inherit; }

  img,svg{ max-width:100%; display:block; }

  .wrap{
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 28px;
    padding-left: max(28px, env(safe-area-inset-left));
    padding-right: max(28px, env(safe-area-inset-right));
  }

  /* ---------- utility ---------- */
  .mono{ font-family: var(--font-mono); letter-spacing: 0.02em; }
  .eyebrow{
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--blue);
    display:flex;
    align-items:center;
    gap: 10px;
  }
  .eyebrow::before{
    content:"";
    width: 18px;
    height: 1px;
    background: var(--amber);
    display:inline-block;
  }
  .visually-hidden{
    position:absolute; width:1px; height:1px; overflow:hidden;
    clip: rect(0 0 0 0); white-space:nowrap;
  }

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

  /* ---------- header ---------- */
  header{
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(241,242,235,0.92);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--line);
  }
  .nav{
    display:flex;
    align-items:center;
    justify-content: space-between;
    padding: 12px 0;
  }
  .logo{
    text-decoration:none;
    display:flex;
    align-items:center;
    gap: 8px;
  }
  .logo img{ height: 60px; width: auto; display:block; }
  .nav-links{
    display:flex;
    gap: 34px;
    list-style:none;
    margin:0; padding:0;
    font-size: 14px;
  }
  .nav-links a{
    text-decoration:none;
    color: var(--ink-soft);
    position:relative;
    padding-bottom: 3px;
  }
  .nav-links a:hover{ color: var(--blue); }
  .nav-right{ display:flex; align-items:center; gap: 26px; }

  .btn{
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.03em;
    text-decoration:none;
    padding: 11px 18px;
    border: 1px solid var(--ink);
    color: var(--ink);
    display:inline-flex;
    align-items:center;
    gap: 8px;
    transition: background 0.15s ease, color 0.15s ease, border-color .15s ease;
    background: transparent;
    cursor:pointer;
  }
  .btn:hover{ background: var(--ink); color: var(--paper); }
  .btn-solid{
    background: var(--blue);
    border-color: var(--blue);
    color: var(--white);
  }
  .btn-solid:hover{ background: var(--blue-deep); border-color: var(--blue-deep); color: var(--white); }

  .menu-toggle{
    display:none;
    background:none; border:none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
  }
  .menu-toggle span{
    width: 22px; height: 2px; background: var(--ink); display:block;
  }

  /* ---------- hero ---------- */
  .hero{
    padding: 86px 0 70px;
    border-bottom: 1px solid var(--line);
    position: relative;
  }
  .hero-grid{
    display:grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items:center;
  }
  .hand-note{
    font-family: var(--font-hand);
    font-size: 22px;
    color: var(--blue-deep);
    transform: rotate(-1.2deg);
    margin: 0 0 6px;
    display: inline-block;
  }
  .h1-wrap{ margin-bottom: 22px; }
  .squiggle{ display:block; margin-top: -6px; width: 220px; max-width: 60%; }
  .squiggle path{ stroke: var(--amber); }

  h1{
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2.4rem, 4.6vw, 3.6rem);
    line-height: 1.08;
    letter-spacing: -0.01em;
    margin: 0 0 22px;
  }
  h1 em{
    font-style: italic;
    color: var(--blue);
    font-weight: 500;
  }
  .hero p.lead{
    font-size: 17px;
    color: var(--ink-soft);
    max-width: 46ch;
    margin: 0 0 32px;
  }
  .hero-ctas{ display:flex; gap: 14px; flex-wrap: wrap; }

  /* schematic diagram */
  .schematic{
    border: 1px solid var(--line);
    background: var(--white);
    padding: 22px 18px 18px;
  }
  .schematic svg .node-box{
    fill: var(--white);
    stroke: var(--ink);
    stroke-width: 1;
  }
  .schematic svg .node-box.primary{
    fill: var(--blue);
    stroke: var(--blue);
  }
  .schematic svg .node-text{
    font-family: var(--font-mono);
    font-size: 9.5px;
    fill: var(--ink);
    text-transform: uppercase;
    letter-spacing: 0.02em;
  }
  .schematic svg .node-text.on-blue{ fill: var(--white); }
  .schematic svg .conn{
    stroke: var(--slate);
    stroke-width: 1;
    fill: none;
  }
  .schematic svg .tick{ stroke: var(--line); stroke-width: 1; }
  .schematic svg .dim-text{
    font-family: var(--font-mono);
    font-size: 8px;
    fill: var(--slate);
  }

  /* ---------- section heading pattern ---------- */
  .section{ padding: 84px 0; border-bottom: 1px solid var(--line); }
  .section-head{
    display:flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 30px;
    margin-bottom: 50px;
    flex-wrap: wrap;
  }
  .section-head h2{
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.7rem, 3vw, 2.3rem);
    margin: 10px 0 0;
    letter-spacing: -0.01em;
  }
  .section-head p{
    max-width: 38ch;
    color: var(--slate);
    margin: 0;
    font-size: 15px;
  }

  /* ---------- services ---------- */
  .services-grid{
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
  }
  .service-card{
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 30px 26px 32px;
    position: relative;
    background: var(--paper);
    transition: background .15s ease, transform .15s ease, box-shadow .15s ease;
  }
  .service-card:hover{
    background: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -14px rgba(20,24,28,0.35);
    position: relative;
    z-index: 2;
  }
  .service-tag{
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--amber);
    letter-spacing: 0.06em;
    margin-bottom: 14px;
    display:block;
  }
  .service-card h3{
    font-family: var(--font-display);
    font-size: 1.18rem;
    font-weight: 600;
    margin: 0 0 12px;
  }
  .service-card p{
    color: var(--slate);
    font-size: 14.5px;
    margin: 0;
  }

  /* ---------- approach / process ---------- */
  .process{
    display:grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    position: relative;
  }
  .process::before{
    content:"";
    position:absolute;
    top: 11px;
    left: 0; right: 0;
    height: 1px;
    background: var(--line);
  }
  .process-step{ position:relative; padding-right: 18px; }
  .process-num{
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--white);
    background: var(--blue);
    width: 22px; height: 22px;
    border-radius: 50%;
    display:flex; align-items:center; justify-content:center;
    position: relative; z-index:2;
    margin-bottom: 18px;
  }
  .process-step h4{
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.04em;
    margin: 0 0 8px;
  }
  .process-step p{
    font-size: 13.5px;
    color: var(--slate);
    margin:0;
  }

  /* ---------- spec sheet / trust ---------- */
  .spec-sheet{
    display:grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 60px;
  }
  .spec-list{
    list-style:none; margin:0; padding:0;
    border-top: 1px solid var(--line);
  }
  .spec-list li{
    display:grid;
    grid-template-columns: 90px 1fr;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
    align-items: baseline;
  }
  .spec-list .k{
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--blue);
    text-transform: uppercase;
    letter-spacing: 0.06em;
  }
  .spec-list .v{ font-size: 15px; color: var(--ink-soft); }
  .spec-side{
    border: 1px solid var(--line);
    background: var(--white);
    padding: 28px;
  }
  .spec-side .eyebrow{ margin-bottom: 16px; }
  .spec-side h3{
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin: 0 0 14px;
  }
  .spec-side p{ color: var(--slate); font-size: 14.5px; margin: 0 0 20px; }

  /* ---------- contact ---------- */
  .contact-grid{
    display:grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
  }
  .contact-info h2{
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.2vw, 2.4rem);
    margin: 12px 0 18px;
  }
  .contact-info p{ color: var(--slate); max-width: 40ch; margin: 0 0 26px; }
  .contact-detail{
    font-family: var(--font-mono);
    font-size: 13.5px;
    margin-bottom: 10px;
    display:flex;
    gap: 10px;
  }
  .contact-detail .k{ color: var(--slate); min-width: 70px; }
  .contact-detail a{ text-decoration: none; border-bottom: 1px solid var(--line); }
  .contact-detail a:hover{ border-color: var(--blue); color: var(--blue); }

  form{
    border: 1px solid var(--line);
    background: var(--white);
    padding: 30px;
  }
  .field{ margin-bottom: 20px; }
  .field label{
    display:block;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--slate);
    margin-bottom: 8px;
  }
  .field input, .field textarea{
    width:100%;
    border: none;
    border-bottom: 1px solid var(--line);
    background: transparent;
    padding: 10px 2px;
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--ink);
  }
  .field input:focus, .field textarea:focus{
    outline:none;
    border-bottom-color: var(--blue);
  }
  .field textarea{ resize: vertical; min-height: 90px; }

  .turnstile-field{ margin-bottom: 22px; }
  .turnstile-field .cf-turnstile{ max-width: 100%; overflow: hidden; }

  .form-foot{
    display:flex; align-items:center; justify-content: space-between;
    margin-top: 6px;
    flex-wrap: wrap;
    gap: 14px;
  }
  .form-note{ font-size: 12px; color: var(--slate); }
  .form-status{
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--blue);
    margin-top: 14px;
    min-height: 1em;
  }

  /* ---------- engagement models ---------- */
  .engagement-grid{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 26px;
  }
  .engagement-card{
    border: 1px solid var(--line);
    background: var(--white);
    padding: 32px 30px;
  }
  .engagement-card.alt{ background: var(--blue); color: var(--white); border-color: var(--blue); }
  .engagement-card .service-tag{ display:block; margin-bottom: 14px; }
  .engagement-card.alt .service-tag{ color: #F0C49A; }
  .engagement-card h3{
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin: 0 0 12px;
  }
  .engagement-card > p{
    font-size: 14.5px;
    color: var(--slate);
    margin: 0 0 22px;
  }
  .engagement-card.alt > p{ color: #D7E2EC; }
  .engagement-card ul{
    list-style:none; margin:0; padding:0;
    display:flex; flex-direction:column; gap: 12px;
  }
  .engagement-card li{
    font-size: 14px;
    padding-left: 20px;
    position: relative;
  }
  .engagement-card li::before{
    content:"";
    position:absolute; left:0; top: 7px;
    width: 8px; height: 8px;
    border: 1.5px solid var(--amber);
    border-radius: 50%;
  }
  .engagement-card.alt li::before{ border-color: #F0C49A; }

  /* ---------- sector strip ---------- */
  .sector-strip{
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 34px 0;
  }
  .sector-row{
    display:flex;
    align-items:center;
    gap: 22px;
    flex-wrap: wrap;
  }
  .sector-row .eyebrow{ margin-right: 6px; }
  .sector-tag{
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--ink-soft);
    border: 1px solid var(--line);
    padding: 7px 14px;
    border-radius: 999px;
    background: var(--white);
  }

  /* ---------- faq ---------- */
  .faq-list{ max-width: 760px; }
  .faq-item{
    border-bottom: 1px solid var(--line);
  }
  .faq-item:first-child{ border-top: 1px solid var(--line); }
  .faq-q{
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    padding: 22px 0;
    display:flex;
    align-items:center;
    justify-content: space-between;
    gap: 20px;
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--ink);
  }
  .faq-q .plus{
    font-family: var(--font-mono);
    font-size: 18px;
    color: var(--amber);
    flex: none;
    transition: transform .2s ease;
  }
  .faq-item.open .faq-q .plus{ transform: rotate(45deg); }
  .faq-a{
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease;
  }
  .faq-a p{
    margin: 0 0 22px;
    color: var(--slate);
    font-size: 14.5px;
    max-width: 60ch;
  }

  /* ---------- toast notification ---------- */
  .toast{
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 999;
    max-width: 360px;
    background: var(--ink);
    color: var(--white);
    padding: 18px 20px;
    display:flex;
    align-items:flex-start;
    gap: 12px;
    border-left: 3px solid var(--amber);
    box-shadow: 0 16px 40px -12px rgba(20,24,28,0.45);
    transform: translateY(20px);
    opacity: 0;
    pointer-events: none;
    transition: transform .25s ease, opacity .25s ease;
  }
  .toast.show{
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .toast.error{ border-left-color: #C24D3A; }
  .toast-icon{
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--amber);
    flex: none;
    margin-top: 1px;
  }
  .toast.error .toast-icon{ color: #E08A78; }
  .toast-body{ font-size: 14px; line-height: 1.45; }
  .toast-body strong{ display:block; font-family: var(--font-display); font-size: 15px; margin-bottom: 3px; }
  .toast-close{
    background:none; border:none; color: var(--paper); opacity:0.6;
    cursor:pointer; font-size: 16px; line-height:1; flex:none; padding:2px;
  }
  .toast-close:hover{ opacity:1; }

  @media (max-width: 680px){
    .toast{ left: 16px; right: 16px; bottom: 16px; max-width: none; }
  }

  /* ---------- footer ---------- */
  footer{ padding: 40px 0; }
  .foot-grid{
    display:flex;
    justify-content: space-between;
    align-items:center;
    flex-wrap: wrap;
    gap: 16px;
  }
  .foot-grid .logo img{ height: 40px; }
  .foot-links{
    display:flex; gap: 24px; list-style:none; margin:0; padding:0;
    font-family: var(--font-mono);
    font-size: 12px;
  }
  .foot-links a{ text-decoration:none; color: var(--slate); }
  .foot-links a:hover{ color: var(--blue); }
  .foot-meta{
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--slate);
  }

  /* ---------- responsive ---------- */

  /* Tablet (portrait iPad and similar) */
  @media (max-width: 980px){
    .hero{ padding: 64px 0 50px; }
    .hero-grid{ grid-template-columns: 1fr; }
    .services-grid{ grid-template-columns: repeat(2,1fr); }
    .process{ grid-template-columns: repeat(3,1fr); row-gap: 30px; }
    .process::before{ display:none; }
    .spec-sheet, .contact-grid{ grid-template-columns: 1fr; gap: 40px; }
    .engagement-grid{ grid-template-columns: 1fr; }
  }

  /* Large phones / small tablets */
  @media (max-width: 680px){
    .nav-links{ display:none; }
    .nav-right .btn-solid{ display:none; }
    .menu-toggle{ display:flex; }
    header.open .nav-links{
      display:flex;
      flex-direction: column;
      position: absolute;
      top: 100%; left:0; right:0;
      background: var(--paper);
      border-bottom: 1px solid var(--line);
      padding: 20px 28px 26px;
      gap: 18px;
    }
    .logo img{ height: 42px; }
    .schematic{ display:none; }
    .services-grid{ grid-template-columns: 1fr; }
    .process{ grid-template-columns: repeat(2,1fr); }
    .section{ padding: 56px 0; }
    .hero{ padding: 48px 0 44px; }
    .section-head{ align-items: flex-start; }
    .foot-grid{ justify-content: center; text-align:center; }
    .foot-links{ justify-content:center; flex-wrap: wrap; }
  }

  /* Small phones */
  @media (max-width: 480px){
    .wrap{ padding: 0 18px; }
    h1{ font-size: clamp(2rem, 9vw, 2.6rem); }
    .hand-note{ font-size: 19px; }
    .hero p.lead{ font-size: 15.5px; }
    .hero-ctas .btn{ width: 100%; justify-content:center; }
    .section-head h2{ font-size: 1.5rem; }
    .spec-list li{ grid-template-columns: 1fr; row-gap: 6px; }
    .engagement-card{ padding: 24px 20px; }
    .faq-q{ font-size: 0.95rem; padding: 18px 0; }
    .contact-detail{ flex-wrap: wrap; }
    .sector-row{ gap: 12px; }
    form{ padding: 22px; }
  }