:root{
    --asphalt:#0E151C;
    --asphalt-2:#16212B;
    --steel:#1F3448;
    --steel-line:#2C4257;
    --amber:#F2A93B;
    --amber-dim:#C98A2C;
    --paper:#F4F1E9;
    --paper-dim:#C9C7BE;
    --route-green:#3E8C63;
    --radius:2px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--asphalt);
    color:var(--paper);
    font-family:'Public Sans', sans-serif;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,.display{
    font-family:'Oswald', sans-serif;
    text-transform:uppercase;
    letter-spacing:0.02em;
    margin:0;
  }
  .mono{font-family:'IBM Plex Mono', monospace;}
  a{color:inherit;}
  .wrap{max-width:1180px; margin:0 auto; padding:0 24px;}
  @media (prefers-reduced-motion: reduce){
    *{animation-duration:0.001ms !important; transition-duration:0.001ms !important;}
  }

  /* ---------- NAV ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(14,21,28,0.92);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--steel-line);
  }
  nav.wrap{
    display:flex; align-items:center; justify-content:space-between;
    height:74px;
  }
  .logo{
    display:flex; align-items:center; gap:10px;
    font-family:'Oswald', sans-serif;
    font-size:19px; font-weight:600;
    text-transform:uppercase;
    letter-spacing:0.03em;
    text-decoration:none;
  }
  .logo .mark{
    width:34px; height:34px;
    border:2px solid var(--amber);
    border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    font-size:15px; font-weight:700; color:var(--amber);
    flex-shrink:0;
  }
  .logo .sub{display:block; font-family:'Public Sans',sans-serif; font-size:10px; letter-spacing:0.14em; color:var(--paper-dim); text-transform:uppercase; font-weight:600;}
  nav ul{list-style:none; display:flex; gap:34px; margin:0; padding:0;}
  nav ul a{
    font-size:13px; font-weight:600; text-transform:uppercase; letter-spacing:0.08em;
    text-decoration:none; color:var(--paper-dim);
    transition:color 0.2s ease;
    padding-bottom:4px; border-bottom:2px solid transparent;
  }
  nav ul a:hover{color:var(--amber); border-bottom-color:var(--amber);}
  nav ul a.active{color:var(--amber); border-bottom-color:var(--amber);}
  .nav-links{display:flex; align-items:center; gap:34px;}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    padding:11px 22px;
    font-size:13px; font-weight:700; text-transform:uppercase; letter-spacing:0.06em;
    text-decoration:none;
    border-radius:var(--radius);
    transition:transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
    white-space:nowrap;
    border:none; cursor:pointer;
  }
  .btn-amber{background:var(--amber); color:var(--asphalt);}
  .btn-amber:hover{background:#ffbf5c; transform:translateY(-1px);}
  .btn-outline{border:1.5px solid var(--paper-dim); color:var(--paper); background:none;}
  .btn-outline:hover{border-color:var(--amber); color:var(--amber);}
  .menu-toggle{display:none; background:none; border:none; color:var(--paper); font-size:26px; cursor:pointer;}

  /* ---------- PAGE HEAD ---------- */
  .page-head{
    padding:64px 0 40px;
    background:
      repeating-linear-gradient(90deg, transparent, transparent 78px, rgba(242,169,59,0.05) 78px, rgba(242,169,59,0.05) 80px),
      linear-gradient(180deg, var(--asphalt) 0%, var(--asphalt-2) 100%);
    border-bottom:1px solid var(--steel-line);
  }
  .eyebrow{
    display:inline-flex; align-items:center; gap:9px;
    font-size:12px; font-weight:700; letter-spacing:0.16em; text-transform:uppercase;
    color:var(--amber); margin-bottom:18px;
  }
  .eyebrow::before{content:''; width:26px; height:2px; background:var(--amber);}
  .page-head h1{font-size:clamp(30px, 4vw, 46px); line-height:1.08; color:var(--paper);}
  .page-head p.lede{font-size:16px; line-height:1.6; color:var(--paper-dim); max-width:560px; margin:18px 0 0;}

  /* ---------- CALCULATOR ---------- */
  section{padding:64px 0;}
  .calc-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:32px;
    align-items:start;
  }
  .card{
    background:var(--steel);
    border:1px solid var(--steel-line);
    border-radius:4px;
    padding:32px;
  }
  .card h3{font-size:19px; margin-bottom:6px;}
  .card p.hint{color:var(--paper-dim); font-size:13px; line-height:1.5; margin:0 0 22px;}
  .form-row{display:grid; gap:14px; margin-bottom:14px;}
  .form-row.two{grid-template-columns:1fr 1fr;}
  .form-row input, .form-row select{
    width:100%;
    background:var(--asphalt);
    border:1px solid var(--steel-line);
    color:var(--paper);
    padding:12px 14px;
    font-family:'IBM Plex Mono', monospace;
    font-size:14px;
    border-radius:2px;
  }
  .form-row input:focus, .form-row select:focus{
    outline:2px solid var(--amber); outline-offset:1px; border-color:var(--amber);
  }
  .form-row label{font-size:11px; text-transform:uppercase; letter-spacing:0.08em; color:var(--paper-dim); font-weight:700; display:block; margin-bottom:6px;}

  .result-row{
    display:flex; justify-content:space-between; align-items:baseline;
    padding:12px 0;
    border-bottom:1px dashed var(--steel-line);
  }
  .result-row:last-child{border-bottom:none;}
  .result-row .label{font-size:12px; letter-spacing:0.08em; text-transform:uppercase; color:var(--paper-dim); font-weight:700;}
  .result-row .val{font-family:'IBM Plex Mono', monospace; font-size:20px; font-weight:600; color:var(--amber);}
  .result-row.total .val{font-size:26px; color:var(--route-green);}
  .disclaimer{margin-top:22px; font-size:12px; color:var(--paper-dim); line-height:1.6;}

  @media (max-width: 860px){
    .calc-grid{grid-template-columns:1fr;}
    nav ul{display:none;}
    .menu-toggle{display:block;}
  }
  @media (max-width: 560px){
    .form-row.two{grid-template-columns:1fr;}
  }

  /* ---------- FOOTER ---------- */
  footer{padding:70px 0 34px; border-top:1px solid var(--steel-line);}
  .footer-grid{
    display:grid; grid-template-columns:1.3fr 1fr 1fr 1fr; gap:48px;
    padding-bottom:48px; border-bottom:1px solid var(--steel-line); margin-bottom:28px;
  }
  footer h4{font-size:12px; text-transform:uppercase; letter-spacing:0.1em; color:var(--paper-dim); margin-bottom:16px; font-weight:700;}
  footer .foot-links{list-style:none; margin:0; padding:0; display:grid; gap:10px;}
  footer .foot-links a{text-decoration:none; color:var(--paper); font-size:14px;}
  footer .foot-links a:hover{color:var(--amber);}
  footer p.blurb{color:var(--paper-dim); font-size:14px; line-height:1.6; max-width:340px; margin-top:12px;}
  .bottom-bar{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;}
  .bottom-bar span{font-size:12px; color:var(--paper-dim);}
  @media (max-width: 940px){
    .footer-grid{grid-template-columns:1fr; gap:32px;}
  }

  /* ---------- SHIPPER GUIDES ---------- */
  .article{max-width:760px;}
  .article h2{font-size:24px; margin:44px 0 14px; color:var(--paper);}
  .article p,.article li{font-size:16px; line-height:1.7; color:var(--paper-dim);}
  .article strong{color:var(--paper);}
  .article ul,.article ol{padding-left:22px; display:grid; gap:8px;}
  .article a{color:var(--amber);}
  .cta-box{background:var(--steel); border:1px solid var(--steel-line); border-left:4px solid var(--amber); padding:24px 26px; margin:36px 0; border-radius:4px;}
  .cta-box h3{font-size:19px; margin-bottom:8px;}
  .cta-box p{margin:0 0 16px;}
  .disclose{font-size:12.5px !important; color:var(--paper-dim); line-height:1.6; margin-top:14px !important;}
  .guide-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(250px,1fr)); gap:18px; margin-top:24px;}
  .guide-grid a{display:block; text-decoration:none; background:var(--steel); border:1px solid var(--steel-line); padding:22px; border-radius:4px; transition:border-color .15s ease;}
  .guide-grid a:hover{border-color:var(--amber);}
  .guide-grid b{display:block; font-family:'Oswald',sans-serif; text-transform:uppercase; font-size:17px; color:var(--paper); margin-bottom:6px; letter-spacing:.02em;}
  .guide-grid span{font-size:14px; color:var(--paper-dim); line-height:1.5;}
  .faq details{border-bottom:1px solid var(--steel-line); padding:14px 0;}
  .faq summary{cursor:pointer; font-weight:700; color:var(--paper); font-size:16px;}
  .faq details p{margin:10px 0 0;}
  .sources{font-size:13px !important;}
  .crumbs{font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:var(--paper-dim); margin-bottom:14px;}
  .crumbs a{color:var(--paper-dim); text-decoration:none;} .crumbs a:hover{color:var(--amber);}