/* ==========================================================================
     how-it-works.css - "How it works" overview page
     Loaded by how-it-works.html.
     See DESIGN.md for the type system, color tokens, and brand rules.
     ========================================================================== */
  /* ===== DESIGN TOKENS - navy/blue brand palette & CSS variables (:root) ===== */
  :root{--paper:#fff;--bg:#F6F5F1;--bg-2:#EFEDE7;--ink:#141a20;--navy:#13294a;--navy-2:#1d3a63;--blue:#1f5fa8;--blue-l:#7fa8dd;--muted:#59626d;--muted-2:#6f7681;--line:#e5e2d9;--ok:#1e7d46}
  /* ===== BASE & TYPOGRAPHY - reset, Hanken Grotesk body, Spectral headings, .wrap, .eyebrow ===== */
  *{box-sizing:border-box;margin:0;padding:0}
  @media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
  body{font-family:'Hanken Grotesk',system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased}
  h1,h2,h3,h4{font-weight:600;line-height:1.12;letter-spacing:-.021em;color:var(--navy)}
  a{color:inherit;text-decoration:none}
  .wrap{max-width:1080px;margin:0 auto;padding:0 32px}
  .eyebrow{font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--blue);font-weight:600}
  /* ===== BUTTONS & LINKS - .btn variants & .link-arrow ===== */
  .btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:15px;padding:14px 26px;border-radius:6px;transition:.2s;cursor:pointer;border:1px solid transparent}
  .btn-nav{background:var(--navy);color:#fff;padding:10px 20px}
  .btn-nav:hover{background:var(--navy-2)}
  .btn-primary{background:var(--navy);color:#fff}
  .btn-primary:hover{background:var(--navy-2);transform:translateY(-1px)}
  .btn-line{border-color:#cfd4d9;color:var(--navy)}
  .btn-line:hover{border-color:var(--navy);background:var(--paper)}
  .btn-white{background:#fff;color:var(--navy)}
  .btn-white:hover{background:#eef2f7;transform:translateY(-1px)}
  .link-arrow{color:var(--blue);font-weight:600;font-size:14.5px;display:inline-flex;align-items:center;gap:6px;transition:.18s}
  .link-arrow:hover{gap:10px}
  /* ===== HEADER & NAV - sticky header, brand lockup, nav links, mobile menu ===== */
  header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  nav{display:flex;align-items:center;justify-content:space-between;height:76px}
  .brand{display:inline-flex;flex-direction:column;align-items:flex-start;line-height:1;color:var(--navy)}
  .brand .bwm{font-weight:700;font-size:18px;letter-spacing:.19em}
  .brand .bsub{font-weight:600;font-size:8px;letter-spacing:.26em;color:var(--muted);border-top:1.5px solid var(--navy);padding-top:4px;margin-top:5px;align-self:stretch;text-align:center}
  .navlinks{display:flex;align-items:center;gap:34px}
  .navlinks a{font-size:14.5px;color:var(--muted);font-weight:500;transition:.15s}
  .navlinks a:hover{color:var(--navy)}
  .menu-btn{display:none;background:none;border:0;font-size:25px;color:var(--navy);cursor:pointer}

  /* HERO */
  .phero{background:linear-gradient(180deg,var(--bg),var(--paper));border-bottom:1px solid var(--line)}
  .phero .wrap{padding:82px 32px 64px;max-width:900px}
  .crumb{font-size:13.5px;color:var(--muted-2);margin-bottom:24px;display:block}
  .crumb a{color:var(--blue);font-weight:500}
  .crumb a:hover{text-decoration:underline}
  .phero h1{font-size:clamp(1.95rem,4.6vw,3.7rem);max-width:16ch;text-wrap:balance}
  .phero h1 .ser{font-family:'Spectral',Georgia,serif;font-style:italic;font-weight:400;color:var(--blue)}
  .phero .lead{font-size:clamp(17px,1.7vw,19.5px);color:var(--muted);max-width:60ch;margin:24px 0 30px}
  .scrollcue{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-2);font-weight:600}
  .scrollcue .dot{width:22px;height:34px;border:2px solid var(--blue-l);border-radius:12px;position:relative;display:inline-block}
  .scrollcue .dot::after{content:"";position:absolute;left:50%;top:6px;width:4px;height:7px;border-radius:2px;background:var(--blue);transform:translateX(-50%);animation:cue 1.6s ease-in-out infinite}
  @keyframes cue{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,12px)}}

  /* SCROLLYTELLING */
  .scrolly{position:relative;background:var(--paper)}
  .scrolly-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:6%;max-width:1180px;margin:0 auto;padding:40px 32px 20px;align-items:start}
  .steps{position:relative;padding-bottom:40vh}
  .step{min-height:88vh;display:flex;flex-direction:column;justify-content:center;padding:24px 0}
  .step .num{font-size:12.5px;letter-spacing:.18em;font-weight:700;color:var(--blue-l);margin-bottom:14px}
  .step .num b{color:var(--blue)}
  .step h2{font-size:clamp(1.5rem,2.7vw,2.15rem);margin-bottom:14px;transition:.4s}
  .step .k{font-family:'Spectral',Georgia,serif;font-style:italic;font-weight:400;color:var(--blue)}
  .step p{color:var(--muted);font-size:16.5px;max-width:44ch}
  .step .tag{display:inline-block;margin-top:16px;font-size:12px;font-weight:600;letter-spacing:.03em;color:var(--navy);background:var(--bg-2);border:1px solid var(--line);border-radius:20px;padding:5px 13px}
  .step{opacity:.34;transition:opacity .45s ease}
  .step.current{opacity:1}

  .graphic{position:sticky;top:104px;height:min(74vh,540px)}
  .panel{position:absolute;inset:0;background:linear-gradient(165deg,#15315b 0%,#0d1f3c 100%);border-radius:18px;overflow:hidden;box-shadow:0 40px 80px -50px rgba(19,41,74,.6)}
  .panel-head{position:absolute;top:0;left:0;right:0;height:44px;display:flex;align-items:center;gap:8px;padding:0 16px;border-bottom:1px solid rgba(255,255,255,.09);z-index:5}
  .panel-head .lbl{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:#a9c8ec;font-weight:600}
  .panel-head .badge{margin-left:auto;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:#cfe0f5;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:4px 10px}
  .stage{position:absolute;inset:44px 0 0 0;opacity:0;transition:opacity .5s ease;display:flex;align-items:center;justify-content:center;padding:22px}
  .stage.active{opacity:1}
  .stage svg{width:100%;height:100%;max-height:440px}
  .illus-note{position:absolute;bottom:10px;right:14px;font-size:9.5px;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.4);z-index:5}

  /* svg primitives */
  .bar{fill:var(--blue-l);transform-box:fill-box;transform-origin:bottom;transform:scaleY(0)}
  .stage.active .bar{animation:grow .8s cubic-bezier(.2,.8,.3,1) forwards}
  .bar.d{fill:#3d6fb0}
  .barh{fill:var(--blue-l);transform-box:fill-box;transform-origin:left;transform:scaleX(0)}
  .stage.active .barh{animation:growx .9s cubic-bezier(.2,.8,.3,1) forwards}
  .ln{stroke-dasharray:600;stroke-dashoffset:600;fill:none}
  .stage.active .ln{animation:draw 1.4s ease forwards}
  .fade{opacity:0}
  .stage.active .fade{animation:fadein .7s ease forwards}
  .pop{opacity:0;transform-box:fill-box;transform-origin:center;transform:scale(.7)}
  .stage.active .pop{animation:pop .55s cubic-bezier(.3,1.3,.5,1) forwards}
  @keyframes grow{to{transform:scaleY(1)}}
  @keyframes growx{to{transform:scaleX(1)}}
  @keyframes draw{to{stroke-dashoffset:0}}
  @keyframes fadein{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
  @keyframes pop{to{opacity:1;transform:scale(1)}}
  .gl{stroke:rgba(255,255,255,.08)}
  .txt{fill:#dfeaf7;font-family:Inter,sans-serif}
  .txt-s{fill:#9fb6d4;font-family:Inter,sans-serif}
  .txt-b{fill:#fff;font-family:Inter,sans-serif;font-weight:700}
  .accent{fill:#7fa8dd}
  /* ISOMETRIC SCENES */
  .isoscene{width:100%;height:100%;display:block;max-height:460px}
  .iso-el{opacity:0}
  .stage.active .iso-el{animation:isoIn .72s cubic-bezier(.2,.8,.3,1) both}
  @keyframes isoIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
  .iso-label{fill:#c9dcf1;font-family:Inter,sans-serif;font-size:12px}
  .iso-label.s{fill:#9fb6d4;font-size:11px}
  .iso-label.b{fill:#fff;font-weight:700;font-size:13px}
  .iso-label.g{fill:#7ee0a8;font-weight:700;font-size:12.5px}
  @media(prefers-reduced-motion:reduce){.iso-el{animation:none!important;opacity:1!important;transform:none!important}}

  /* progress rail */
  .rail{position:fixed;left:26px;top:50%;transform:translateY(-50%);z-index:40;display:flex;flex-direction:column;gap:11px}
  .rail i{width:8px;height:8px;border-radius:50%;background:var(--line);transition:.3s;display:block}
  .rail i.on{background:var(--blue);transform:scale(1.35)}
  @media(max-width:1180px){.rail{display:none}}

  /* CTA + footer */
  .cta{background:var(--navy);color:#fff;text-align:center}
  .cta .wrap{padding:76px 32px}
  .cta h2{color:#fff;font-size:clamp(1.7rem,3vw,2.4rem);max-width:20ch;margin:0 auto 14px}
  .cta p{color:#c9d6e8;max-width:52ch;margin:0 auto 28px}
  footer{background:#0e2038;color:#8fa0b6;border-top:1px solid rgba(127,168,221,.16)}
  footer .wrap{padding:56px 32px 30px}
  footer .ft-top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.15fr;gap:40px 34px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.09)}
  footer .ft-brand .brand{color:#fff;font-weight:700;letter-spacing:.14em;font-size:16px}
  footer .ft-brand .brand sup{font-size:.5em;letter-spacing:0;top:-.7em}
  footer .ft-tag{color:#9fb0c4;font-size:13.5px;line-height:1.62;margin-top:14px;max-width:46ch}
  footer .ft-loc{color:#7f93ac;font-size:12px;letter-spacing:.03em;margin-top:12px}
  footer .ft-col h4{color:#cfe0f5;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;margin-bottom:13px}
  footer .ft-col a{display:block;color:#9fb0c4;font-size:13.5px;line-height:1.5;padding:5px 0;transition:color .15s}
  footer .ft-col a:hover{color:#fff}
  footer .ft-col .ft-cred{display:block;color:#7f93ac;font-size:11.5px;line-height:1.5;margin-top:13px;border-top:1px solid rgba(255,255,255,.09);padding-top:12px}
  footer .ft-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px 20px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;color:#7f93ac}
  footer .ft-bottom .brand{color:#fff;font-weight:600;letter-spacing:.03em}
  footer .ft-bottom a{color:inherit;text-decoration:underline}
  @media(max-width:820px){footer .ft-top{grid-template-columns:1fr 1fr}}
  @media(max-width:520px){footer .ft-top{grid-template-columns:1fr;gap:30px}}

  /* ===== RESPONSIVE - mobile nav, stacked scrollytelling & reduced-motion ===== */
  @media(max-width:860px){
    .scrolly-inner{display:block;padding:12px 20px}
    .graphic{position:sticky;top:72px;height:min(40vh,300px);margin:0 auto 6px;max-width:460px;z-index:6}
    .graphic .panel{box-shadow:0 20px 44px -30px rgba(19,41,74,.7)}
    .steps{margin-top:0;padding-bottom:26vh}
    .step{min-height:70vh;padding:16px 0;opacity:1;justify-content:center}
    .step h2{font-size:1.5rem}
    .step p{max-width:none;font-size:15.5px}
    .step .tag{margin-top:12px}
    .navlinks{position:absolute;top:76px;right:0;left:0;background:rgba(255,255,255,.98);backdrop-filter:blur(10px);flex-direction:column;gap:0;padding:8px 0;border-bottom:1px solid var(--line);display:none}
    .navlinks a{padding:12px 32px;width:100%}
    .navlinks.open{display:flex}
    .menu-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;margin-right:-9px}
    .phero .wrap{padding:56px 22px 36px}
    .phero .lead{font-size:16px;margin-bottom:22px}
    .scrollcue{font-size:11px}
    .rail{display:none}
  }
  @media(prefers-reduced-motion:reduce){
    .bar,.barh,.ln,.fade,.pop{animation:none!important;transform:none!important;opacity:1!important;stroke-dashoffset:0!important}
    html{scroll-behavior:auto}
  }

  /* ═══ THE VALUATION THEATER — the room changes as the work deepens (Higgsfield backplates) ═══ */
  .scrolly.vtheater{background:radial-gradient(120% 100% at 50% 0%,#182740 0%,#111725 50%,#0b0e15 100%)}
  .vt-back{position:sticky;top:0;height:100vh;margin-bottom:-100vh;overflow:hidden;pointer-events:none;z-index:0}
  .vt-layer{position:absolute;inset:0;opacity:0;transition:opacity 1.2s ease}
  .vt-layer.on{opacity:.38}
  .vt-layer img,.vt-layer video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
  .vt-layer video{opacity:0;transition:opacity .8s ease}
  .vt-layer.on video.playing{opacity:1}
  .vt-back::after{content:'';position:absolute;inset:0;
    background:radial-gradient(90% 72% at 50% 40%, rgba(6,12,24,0) 28%, rgba(6,12,24,.66) 76%, rgba(4,9,18,.86) 100%)}
  .scrolly.vtheater .scrolly-inner{position:relative;z-index:1}
  .scrolly.vtheater .step h2{color:#fff}
  .scrolly.vtheater .step .num b{color:#cfe1f8}
  .scrolly.vtheater .step p{color:#aebfd8}
  .scrolly.vtheater .step .k,.scrolly.vtheater .step .kick{color:#9fc0ea}
  .vtheater .panel{border:1px solid rgba(148,190,246,.30);
    box-shadow:0 0 0 6px #0d1626,0 0 0 7px rgba(148,190,246,.20),
      0 30px 80px -20px rgba(64,132,240,.30),0 70px 140px -40px rgba(0,0,0,.82)}
  @media (prefers-reduced-motion:reduce){
    .vt-layer{transition:none}
    .vt-layer video{display:none}}

  /* full-bleed diagram theater: the schematic IS the film */
  .vtheater .graphic{display:none}
  .vtheater .scrolly-inner{display:block;max-width:none;padding:0}
  .vtheater .steps{padding:6vh 0 0 clamp(24px,4vw,72px);max-width:470px}
  .vtheater .step{min-height:92vh;text-align:left;position:relative;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}
  .vtheater .step::before{content:"";position:absolute;top:50%;left:-40px;transform:translateY(-50%);width:min(600px,96vw);height:min(640px,90vh);background:radial-gradient(ellipse 55% 50% at 42% 50%,rgba(6,13,27,.9),rgba(6,13,27,.62) 55%,rgba(6,13,27,0) 79%);z-index:-1;pointer-events:none}
  .vtheater .step h2,.vtheater .step p,.vtheater .step .num,.vtheater .step .k{text-shadow:0 1px 3px rgba(4,10,22,.9),0 2px 24px rgba(4,10,22,.7)}
  .vtheater .step h2{font-size:clamp(1.45rem,2.3vw,2rem);letter-spacing:-.012em;line-height:1.12}
  .vtheater .step p{font-size:15.5px;max-width:40ch;color:#aebfd8}
  .vt-layer.on{opacity:1}
  .vt-layer svg{position:absolute;inset:0;width:100%;height:100%}
  .vt-blue{position:absolute;inset:0;opacity:.5;background:
    repeating-linear-gradient(0deg,rgba(148,190,246,.05) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(90deg,rgba(148,190,246,.05) 0 1px,transparent 1px 72px)}
  .vt-back::after{background:radial-gradient(94% 82% at 50% 46%, rgba(6,12,24,0) 42%, rgba(6,12,24,.34) 74%, rgba(4,9,18,.72) 100%)}
  .vt-layer .ln{stroke-dasharray:1;stroke-dashoffset:1;fill:none}
  .vt-layer.on .ln{animation:draw 1s cubic-bezier(.45,0,.2,1) forwards}
  .vt-layer.on .bar{animation:grow .7s cubic-bezier(.2,.8,.3,1) forwards}
  .vt-layer.on .barh{animation:growx .8s cubic-bezier(.2,.8,.3,1) forwards}
  .vt-layer.on .fade{animation:fadein .6s ease forwards}
  .vt-layer.on .pop{animation:pop .5s cubic-bezier(.3,1.3,.5,1) forwards}
  .vt-layer text{font-family:'Hanken Grotesk',system-ui,sans-serif}
  .vt-layer .sv-lab{fill:#9fc0ea;font-weight:600;letter-spacing:.13em}
  .vt-layer .sv-dim2{fill:#7c95b8;font-weight:500;letter-spacing:.1em}
  .vt-layer .sv-good{fill:#7ee0a8;font-weight:700;letter-spacing:.12em}
  .vt-layer .sv-risk{fill:#e07a72;font-weight:700;letter-spacing:.12em}
  .vt-layer .sv-warm{fill:#e0a86e;font-weight:600;letter-spacing:.12em}
  @media(max-width:860px){
    .vtheater .steps{max-width:none;padding:4vh 18px 0}
    .vtheater .step{min-height:88vh}
    .vtheater .step::before{left:50%;transform:translate(-50%,-50%);width:96vw}
  }