:root{
    --navy-deep: #0c2138;
    --navy: #12314f;
    --navy-line: #4f87ab;
    --cyan-line: #7fc4e0;
    --paper: #f4efe2;
    --paper-dim: #e7e0cd;
    --ink: #152238;
    --amber: #d98e2f;
    --amber-soft: #e8c589;
    --white: #fbf9f2;
  }

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

  body{
    margin:0;
    background: var(--navy-deep);
    color: var(--white);
    font-family: 'Source Serif 4', serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  h1, h2, h3, .display{
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0;
  }

  .mono{
    font-family: 'IBM Plex Mono', monospace;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  a{ color: inherit; }

  .blueprint-bg{
    background-image:
      linear-gradient(var(--navy) 1px, transparent 1px),
      linear-gradient(90deg, var(--navy) 1px, transparent 1px);
    background-size: 44px 44px;
    background-position: -1px -1px;
  }

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

  /* ---------- NAV ---------- */
  header{
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(12,33,56,0.88);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid rgba(127,196,224,0.25);
  }
  nav{
    display:flex;
    align-items:center;
    justify-content: space-between;
    padding: 18px 32px;
    max-width: 1180px;
    margin: 0 auto;
  }
  .logo{
    font-size: 1.05rem;
    font-weight: 700;
    white-space: nowrap;
  }
  .logo .dot{ color: var(--amber); }
  nav ul{
    list-style:none;
    display:flex;
    gap: 32px;
    margin:0; padding:0;
    font-size: 0.82rem;
  }
  nav ul a{ text-decoration:none; opacity:0.85; transition: opacity 0.2s; }
  nav ul a:hover{ opacity: 1; color: var(--amber-soft); }
  .nav-cta{
    border: 1px solid var(--cyan-line);
    padding: 8px 16px;
    font-size: 0.78rem;
    text-decoration: none;
    white-space: nowrap;
  }
  .nav-cta:hover{ background: var(--cyan-line); color: var(--navy-deep); }

  .nav-toggle{
    display:none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 34px; height: 34px;
    background: none;
    border: 1px solid rgba(127,196,224,0.4);
    cursor: pointer;
    padding: 0;
  }
  .nav-toggle span{
    display:block;
    height: 1.5px;
    margin: 0 8px;
    background: var(--white);
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .nav-toggle.is-open span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2){ opacity: 0; }
  .nav-toggle.is-open span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }

  .mobile-menu{
    display:none;
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    background: var(--navy);
    border-top: 1px solid rgba(127,196,224,0.15);
    transition: max-height 0.25s ease;
  }
  .mobile-menu.open{ max-height: 280px; }
  .mobile-menu a{
    padding: 16px 32px;
    text-decoration:none;
    font-size: 0.92rem;
    border-bottom: 1px solid rgba(127,196,224,0.12);
  }
  .mobile-menu .mobile-cta{
    color: var(--amber-soft);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
  }

  /* ---------- HERO ---------- */
  .hero{
    padding: 96px 0 60px;
    position: relative;
    overflow: hidden;
  }
  .hero-inner{
    display:grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
  }
  .eyebrow{
    font-size: 0.74rem;
    color: var(--cyan-line);
    display:flex;
    align-items:center;
    gap: 10px;
    margin-bottom: 22px;
  }
  .eyebrow::before{
    content:"";
    width: 26px; height: 1px;
    background: var(--cyan-line);
  }
  .hero h1{
    font-size: clamp(2.3rem, 4.4vw, 3.6rem);
    line-height: 1.08;
    color: var(--white);
  }
  .hero h1 em{
    font-style: normal;
    color: var(--amber-soft);
  }
  .hero p.lede{
    margin-top: 24px;
    font-size: 1.14rem;
    color: rgba(251,249,242,0.82);
    max-width: 46ch;
  }
  .hero-ctas{
    margin-top: 34px;
    display:flex;
    gap: 16px;
    flex-wrap: wrap;
  }
  .btn-primary{
    background: var(--amber);
    color: var(--navy-deep);
    padding: 13px 26px;
    text-decoration: none;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.92rem;
    border: 1px solid var(--amber);
    transition: transform 0.15s ease;
  }
  .btn-primary:hover{ transform: translateY(-2px); }
  .btn-ghost{
    padding: 13px 22px;
    text-decoration: none;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: 0.92rem;
    border: 1px solid rgba(251,249,242,0.3);
    color: var(--white);
  }
  .btn-ghost:hover{ border-color: var(--cyan-line); color: var(--cyan-line); }

  /* ---------- SCHEMATIC DIAGRAM ---------- */
  .schematic{
    position: relative;
  }
  .schematic svg{ width: 100%; height: auto; overflow: visible; }
  .sch-node-label{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.06em;
  }
  .sch-node-title{
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 14px;
  }
  .sch-anno{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 9.5px;
    fill: rgba(127,196,224,0.75);
    letter-spacing: 0.03em;
  }

  /* ---------- SECTION HEADERS ---------- */
  .section{ padding: 88px 0; }
  .section-head{
    display:flex;
    align-items:flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 48px;
    border-bottom: 1px solid rgba(127,196,224,0.22);
    padding-bottom: 22px;
    flex-wrap: wrap;
  }
  .section-head .tag{
    font-size: 0.72rem;
    color: var(--cyan-line);
  }
  .section-head h2{
    font-size: clamp(1.7rem, 3vw, 2.3rem);
    color: var(--white);
    margin-top: 6px;
  }
  .section-head p{
    max-width: 34ch;
    font-size: 0.94rem;
    color: rgba(251,249,242,0.62);
    margin: 0;
  }

  /* ---------- SERVICES ---------- */
  .services{
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: rgba(127,196,224,0.22);
    border: 1px solid rgba(127,196,224,0.22);
  }
  .service{
    background: var(--navy-deep);
    padding: 34px 28px 30px;
    position: relative;
  }
  .service .mono.mark{
    font-size: 0.68rem;
    color: var(--amber-soft);
    display:block;
    margin-bottom: 18px;
  }
  .service h3{
    font-size: 1.18rem;
    color: var(--white);
    margin-bottom: 14px;
  }
  .service p{
    font-size: 0.92rem;
    color: rgba(251,249,242,0.68);
    margin: 0 0 16px;
  }
  .service ul{
    margin:0; padding:0;
    list-style:none;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    color: rgba(127,196,224,0.85);
  }
  .service ul li{
    padding: 5px 0;
    border-top: 1px dashed rgba(127,196,224,0.22);
  }
  .service ul li:first-child{ border-top: none; }

  /* ---------- APPROACH / PAPER PANEL ---------- */
  .paper-panel{
    background: var(--paper);
    color: var(--ink);
  }
  .paper-panel .section-head{
    border-bottom-color: rgba(21,34,56,0.18);
  }
  .paper-panel .section-head .tag{ color: #8a5a15; }
  .paper-panel .section-head h2{ color: var(--ink); }
  .paper-panel .section-head p{ color: rgba(21,34,56,0.62); }

  .approach-grid{
    display:grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 56px;
  }
  .approach-item{
    border-left: 2px solid var(--amber);
    padding-left: 20px;
  }
  .approach-item .mono{
    font-size: 0.68rem;
    color: #8a5a15;
    display:block;
    margin-bottom: 10px;
  }
  .approach-item h3{
    font-size: 1.08rem;
    margin-bottom: 8px;
  }
  .approach-item p{
    font-size: 0.92rem;
    color: rgba(21,34,56,0.72);
    margin:0;
  }

  /* ---------- ABOUT ---------- */
  .about{
    display:grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 56px;
    align-items: start;
  }
  .about-card{
    background: var(--navy);
    border: 1px solid rgba(127,196,224,0.25);
    padding: 28px;
  }
  .about-card .mono{
    font-size: 0.68rem;
    color: var(--cyan-line);
    display:block;
    margin-bottom: 16px;
  }
  .about-card dl{ margin:0; }
  .about-card dt{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.68rem;
    color: rgba(251,249,242,0.5);
    margin-top: 16px;
  }
  .about-card dt:first-child{ margin-top: 0; }
  .about-card dd{
    margin: 4px 0 0;
    font-size: 0.92rem;
    color: var(--white);
  }
  .about-text h2{
    font-size: clamp(1.7rem, 3vw, 2.2rem);
    color: var(--white);
    margin-bottom: 20px;
  }
  .about-text p{
    font-size: 1rem;
    color: rgba(251,249,242,0.78);
    margin: 0 0 18px;
    max-width: 62ch;
  }

  /* ---------- CONTACT ---------- */
  .contact{
    background: var(--navy);
    border-top: 1px solid rgba(127,196,224,0.25);
    padding: 90px 0 60px;
    text-align: center;
  }
  .contact h2{
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: var(--white);
    max-width: 20ch;
    margin: 0 auto 20px;
  }
  .contact p{
    color: rgba(251,249,242,0.68);
    max-width: 48ch;
    margin: 0 auto 34px;
  }
  .contact-links{
    display:flex;
    gap: 18px;
    justify-content:center;
    flex-wrap: wrap;
  }
  footer{
    padding: 28px 0 40px;
    text-align:center;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    color: rgba(251,249,242,0.4);
  }

  @media (max-width: 860px){
    .hero-inner{ grid-template-columns: 1fr; }
    .services{ grid-template-columns: 1fr; }
    .approach-grid{ grid-template-columns: 1fr; }
    .about{ grid-template-columns: 1fr; }
    nav ul{ display:none; }
    .nav-cta{ display:none; }
    .nav-toggle{ display:flex; }
    .mobile-menu{ display:flex; }
  }

  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior: auto; }
    .btn-primary{ transition:none; }
  }

/* ---------- ARTICLE PAGE ---------- */
.article-hero{
  padding: 72px 0 48px;
}
.article-hero .eyebrow{ margin-bottom: 18px; }
.article-hero h1{
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--white);
  max-width: 18ch;
}
.article-hero p.lede{
  margin-top: 20px;
  font-size: 1.08rem;
  color: rgba(251,249,242,0.8);
  max-width: 58ch;
}
.article-body{
  max-width: 720px;
}
.article-body h2{
  font-size: 1.5rem;
  color: var(--white);
  margin-top: 56px;
  margin-bottom: 18px;
  padding-top: 24px;
  border-top: 1px solid rgba(127,196,224,0.2);
}
.article-body h2:first-child{ margin-top: 0; border-top: none; padding-top: 0; }
.article-body p{
  font-size: 1.02rem;
  color: rgba(251,249,242,0.82);
  margin: 0 0 18px;
}
.article-body .standfirst{
  font-size: 1.12rem;
  color: var(--white);
}

.dim-grid{
  display: grid;
  gap: 1px;
  background: rgba(127,196,224,0.22);
  border: 1px solid rgba(127,196,224,0.22);
  margin: 28px 0 8px;
}
.dim{
  background: var(--navy-deep);
  padding: 22px 24px;
}
.dim .mono{
  font-size: 0.68rem;
  color: var(--amber-soft);
  display:block;
  margin-bottom: 10px;
}
.dim h3{
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 10px;
}
.dim p{
  font-size: 0.92rem;
  color: rgba(251,249,242,0.72);
  margin: 0 0 10px;
}
.dim .example{
  font-size: 0.86rem;
  color: rgba(127,196,224,0.85);
  border-left: 2px solid var(--cyan-line);
  padding-left: 12px;
}

.shift-table{
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0 40px;
  font-size: 0.92rem;
}
.shift-table th{
  text-align:left;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  color: var(--cyan-line);
  padding: 10px 16px;
  border-bottom: 1px solid rgba(127,196,224,0.3);
}
.shift-table td{
  padding: 12px 16px;
  border-bottom: 1px dashed rgba(127,196,224,0.18);
  color: rgba(251,249,242,0.82);
  vertical-align: top;
}
.shift-table td:first-child{ color: rgba(251,249,242,0.5); }

.pull-note{
  background: var(--navy);
  border-left: 2px solid var(--amber);
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 0.96rem;
  color: rgba(251,249,242,0.85);
}

@media (max-width: 700px){
  .dim-grid{ grid-template-columns: 1fr !important; }
  .shift-table{ font-size: 0.82rem; }
}

/* ---------- CASE STUDIES ---------- */
  .case{
    border: 1px solid rgba(127,196,224,0.22);
    margin-bottom: 1px;
    padding: 40px;
  }
  .case-head{
    display:flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 24px;
  }
  .case-head .mono{
    font-size: 0.68rem;
    color: var(--amber-soft);
    display:block;
    margin-bottom: 10px;
  }
  .case-head h2{
    font-size: 1.5rem;
    color: var(--white);
    max-width: 32ch;
  }
  .case-meta{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: rgba(127,196,224,0.8);
    text-align: right;
    white-space: nowrap;
  }
  .case-grid{
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  .case-col .mono{
    font-size: 0.66rem;
    color: var(--cyan-line);
    display:block;
    margin-bottom: 10px;
  }
  .case-col p{
    font-size: 0.92rem;
    color: rgba(251,249,242,0.78);
    margin: 0;
  }

  @media (max-width: 760px){
    .case-grid{ grid-template-columns: 1fr; }
    .case{ padding: 28px 22px; }
  }

.error-page{
    min-height: 100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
    padding: 40px 32px;
  }
  .error-page .code{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--cyan-line);
    letter-spacing: 0.08em;
    margin-bottom: 18px;
  }
  .error-page h1{
    font-size: clamp(2.2rem, 6vw, 3.4rem);
    color: var(--white);
    margin-bottom: 18px;
  }
  .error-page p{
    color: rgba(251,249,242,0.72);
    max-width: 46ch;
    margin: 0 auto 32px;
    font-size: 1.02rem;
  }