/* shell.css — variables, reset, fonts, utilities */

@font-face{
  font-family:"Big Shoulders Display";
  src:local("Big Shoulders Display"), url("../fonts/big-shoulders-display-700.woff2") format("woff2");
  font-weight:700;
  font-display:swap;
  font-style:normal;
}
@font-face{
  font-family:"Big Shoulders Display";
  src:local("Big Shoulders Display"), url("../fonts/big-shoulders-display-800.woff2") format("woff2");
  font-weight:800;
  font-display:swap;
  font-style:normal;
}
@font-face{
  font-family:"IBM Plex Mono";
  src:local("IBM Plex Mono"), url("../fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight:500;
  font-display:swap;
  font-style:normal;
}
@font-face{
  font-family:"Source Sans 3";
  src:local("Source Sans 3"), local("Source Sans Pro"), url("../fonts/source-sans-3-400.woff2") format("woff2");
  font-weight:400;
  font-display:swap;
}
@font-face{
  font-family:"Source Sans 3";
  src:local("Source Sans 3"), local("Source Sans Pro"), url("../fonts/source-sans-3-600.woff2") format("woff2");
  font-weight:600;
  font-display:swap;
}

:root{
  --navy:#003366;
  --navy-soft:#0a3f7a;
  --sea:#336699;
  --sea-soft:#5f86b3;
  --sand:#CCCC99;
  --sand-soft:#dcd9b2;
  --paper:#F5F2EA;
  --paper-soft:#ECE7D9;
  --ink:#1A1F2E;
  --ink-soft:#445063;
  --bronze:#A87838;
  --bronze-dark:#6F4E1F;
  --rope:#8B7355;
  --line:#cfc7b2;

  --font-display:"Big Shoulders Display","Oswald","Arial Narrow",sans-serif;
  --font-body:"Source Sans 3","Source Sans Pro","Helvetica Neue",Helvetica,Arial,sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular","Consolas",monospace;

  --wrap:1200px;
  --r-sm:2px;
  --r-md:4px;
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.6;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  background-image:
    radial-gradient(1200px 600px at -10% -10%, rgba(0,51,102,.05), transparent 60%),
    radial-gradient(900px 500px at 110% 10%, rgba(168,120,56,.06), transparent 55%);
}

img,svg{max-width:100%;height:auto;display:block}
a{color:var(--sea);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--bronze-dark)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--bronze);
  outline-offset:3px;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.1;
  color:var(--navy);
  letter-spacing:.5px;
  margin:0 0 16px;
  text-transform:uppercase;
}
h1{font-size:clamp(40px,6vw,60px)}
h2{font-size:clamp(30px,4vw,42px)}
h3{font-size:clamp(22px,2.4vw,28px)}
h4{font-size:20px;letter-spacing:.3px}
p{margin:0 0 16px;max-width:68ch}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 24px;
}
@media(min-width:768px){
  .wrap{padding:0 40px}
}

.section{padding:64px 0}
@media(min-width:768px){
  .section{padding:96px 0}
}
.section.alt{background:var(--paper-soft)}
.section.sand{background:linear-gradient(180deg,var(--sand-soft) 0%, var(--sand) 100%)}
.section.navy{background:var(--navy);color:var(--paper)}
.section.navy h2,.section.navy h3,.section.navy h4{color:var(--paper)}
.section.navy a{color:var(--sand-soft)}
.section.navy a:hover{color:#fff}

.tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:1.5px;
  text-transform:uppercase;
  color:var(--bronze-dark);
  margin-bottom:16px;
  padding:4px 10px;
  border:1px solid var(--bronze);
  border-radius:0;
}
.section.navy .tag{color:var(--sand);border-color:var(--sand)}

.btn{
  display:inline-block;
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  letter-spacing:1.5px;
  text-transform:uppercase;
  padding:14px 28px;
  background:var(--navy);
  color:var(--paper);
  border:2px solid var(--bronze);
  cursor:pointer;
  transition:transform .2s ease, background .2s ease, border-color .2s ease;
  text-decoration:none;
  border-radius:0;
  line-height:1.1;
}
.btn:hover{
  background:var(--bronze);
  border-color:var(--bronze-dark);
  color:#fff;
}
.btn.ghost{
  background:transparent;
  color:var(--navy);
  border-color:var(--navy);
}
.btn.ghost:hover{
  background:var(--navy);
  color:var(--paper);
  border-color:var(--navy);
}
.section.navy .btn.ghost{
  color:var(--paper);
  border-color:var(--sand);
}
.section.navy .btn.ghost:hover{
  background:var(--sand);
  color:var(--navy);
}

.muted{color:var(--ink-soft)}
.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

.a11y-skip{
  position:absolute;
  top:-100px;
  left:8px;
  background:var(--navy);
  color:var(--paper);
  padding:10px 16px;
  z-index:200;
  font-family:var(--font-display);
  letter-spacing:1px;
  text-transform:uppercase;
}
.a11y-skip:focus{top:8px}

/* rope-style horizontal divider */
.rope-line{
  display:block;
  width:100%;
  height:14px;
  margin:32px 0;
  color:var(--rope);
  opacity:.5;
}

@media(prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
}