/* pwp-authored-additional-v1-20261028: technical foundation only */
@layer pwp-runtime-foundation {
  :root {
    --bg:#F0F9FF; --text:#0C4A6E;
    --surface:#FFFFFF; --text-muted:#475569;
    --primary:#0EA5E9; --primary-fg:#0F172A;
    --border:#BAE6FD;
  }
  *, *::before, *::after { box-sizing:border-box; }
  html { scroll-behavior:smooth; }
  body { margin:0; background:var(--bg); color:var(--text); }
  img, video { max-inline-size:100%; block-size:auto; }
  button, input, select, textarea { font:inherit; }
  button, summary { cursor:pointer; }
  :where(a,button,input,select,textarea,summary):focus-visible { outline:2px solid currentColor; outline-offset:4px; }
  .skip { position:fixed; inset-block-start:-10rem; inset-inline-start:1rem; z-index:10000; padding:.75rem; background:var(--bg); color:var(--text); }
  .skip:focus { inset-block-start:1rem; }
  /* Legal prose is a separate utility; never constrain the author's main site. */
  .legal-container { max-inline-size:76ch; margin-inline:auto; padding:clamp(1rem,4vw,3rem); }
  .legal-body { line-height:1.7; overflow-wrap:anywhere; }
  .legal-body p + p, .legal-body section + section { margin-block-start:1.25em; }
  .legal-body table { display:block; overflow-x:auto; max-inline-size:100%; }
  .legal-body h1, .legal-body h2, .legal-body h3, .legal-title { line-height:1.2; }
  [data-cookie-fallback] { position:fixed; inset-inline:1rem; inset-block-end:1rem; z-index:9999; max-inline-size:34rem; padding:1rem; border:1px solid var(--border); background:var(--bg); color:var(--text); }
  [data-cookie-fallback] .cookie-text { font:14px/1.5 system-ui,sans-serif; }
  [data-cookie-fallback] .cookie-actions { display:flex; flex-wrap:wrap; gap:.75rem; margin-block-start:.75rem; }
  [data-cookie-fallback] button { min-block-size:44px; padding:.6rem 1rem; border:1px solid var(--border); background:var(--surface); color:var(--text); }
  [data-cookie-fallback] [data-action="accept-cookie"] { background:var(--primary); color:var(--primary-fg); }
}
/* Required state, not a visual layout. Expanded pages may be grid/flex/block. */
[hidden], .cookie-banner.hidden { display:none !important; }
@media(prefers-reduced-motion:reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; }
}

/* === AUTHOR-OWNED SITE STYLES === */
:root{--bg:#f5f3eb;--text:#172f32;--surface:#fffef9;--text-muted:#526568;--primary:#155b60;--primary-fg:#fff;--border:#c9d2ca;--accent:#d76643;--water:#c8e1dd;--ink:#102d30}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"DM Sans",sans-serif;line-height:1.6}a{color:inherit;text-underline-offset:4px}a:hover{color:var(--primary)}button{font:inherit}button,a,summary{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #d76643;outline-offset:4px}[hidden]{display:none!important}
.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.header-inner{max-width:1440px;margin:auto;padding:20px 5%;display:flex;align-items:center;gap:36px;justify-content:space-between}.brand{text-decoration:none;display:flex;align-items:center;gap:11px;line-height:1}.brand-mark{width:43px;height:43px;flex:none}.brand-name{font-family:"Space Grotesk",sans-serif;font-size:1.15rem;font-weight:700;letter-spacing:-.06em}.brand-name small{display:block;font-family:"DM Sans",sans-serif;font-size:.65rem;font-weight:500;letter-spacing:.11em;text-transform:uppercase;margin-top:6px}.nav-links{display:flex;align-items:center;gap:26px;flex-wrap:wrap}.nav-links>a,.nav-links summary{font-size:.9rem;font-weight:700;text-decoration:none;cursor:pointer}.nav-links details{position:relative}.nav-links summary{list-style:none}.nav-links summary::-webkit-details-marker{display:none}.nav-links summary:after{content:" ⌄"}.nav-drop{position:absolute;z-index:5;top:100%;left:-20px;padding:14px 20px;background:var(--surface);border:1px solid var(--border);width:240px;box-shadow:0 12px 24px #102d3015}.nav-drop a{display:block;padding:7px 0;font-size:.9rem;text-decoration:none}.languages{display:flex;gap:10px;font-size:.78rem}.languages a{text-decoration:none}.languages [aria-current]{font-weight:700;text-decoration:underline}
.hero{background:var(--water);overflow:hidden}.hero-inner{max-width:1440px;margin:auto;display:grid;grid-template-columns:1fr 1fr;align-items:center;min-height:520px}.hero-copy{padding:70px 5vw 75px 7vw;position:relative;z-index:1}.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--primary);margin:0 0 18px}.hero h1,.page-heading h1{font-family:"Space Grotesk",sans-serif;letter-spacing:-.055em;line-height:1.02;margin:0;font-weight:600}.hero h1{font-size:clamp(3.4rem,6.5vw,6.7rem);max-width:700px}.hero-copy>p:not(.eyebrow){font-size:1.15rem;max-width:530px;margin:25px 0 30px}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;background:var(--ink);color:#fff;text-decoration:none;font-weight:700;padding:14px 20px;min-height:50px;border:1px solid var(--ink)}.button:hover{background:var(--primary);color:#fff}.hero-art{align-self:stretch;min-height:420px;position:relative}.hero-art svg{width:100%;height:100%;display:block}.art-label{position:absolute;right:7%;bottom:7%;font-size:.75rem;font-weight:700;letter-spacing:.06em;color:#244c4e}
.wrap{width:min(1280px,90%);margin:auto}.section{padding:88px 0}.section-top{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:35px}.section-top h2,.closing h2{font-family:"Space Grotesk",sans-serif;font-size:clamp(2rem,4vw,3.5rem);line-height:1.08;letter-spacing:-.045em;margin:0;max-width:700px}.section-top p{max-width:420px;margin:0;color:var(--text-muted)}.route-list{border-top:1px solid var(--text)}.route-row{display:grid;grid-template-columns:75px 1fr 1.2fr auto;gap:25px;align-items:start;padding:27px 0;border-bottom:1px solid var(--border);text-decoration:none}.route-row:hover{color:var(--primary)}.route-num{color:var(--accent);font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:1.2rem}.route-row h3{font-size:1.4rem;line-height:1.2;margin:0}.route-row p{margin:0;color:var(--text-muted);max-width:520px}.arrow{font-size:1.5rem;line-height:1}
.guide-band{background:var(--ink);color:#fff}.guide-band .section-top p{color:#c3d2cf}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid #75918d}.guide-link{padding:30px 30px 12px 0;text-decoration:none}.guide-link+ .guide-link{border-left:1px solid #75918d;padding-left:30px}.guide-link h3{font-family:"Space Grotesk",sans-serif;font-size:1.5rem;line-height:1.15;margin:0 0 14px}.guide-link p{color:#c3d2cf;margin:0 0 20px}.guide-link span{font-weight:700;color:#f1b49d}.guide-link:hover{color:#fff}.note{background:#e8eee6;border-left:4px solid var(--primary);padding:20px 24px;color:var(--text);margin:28px 0}.note p{margin:0}.closing{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:60px 0}.closing p{margin:12px 0 0;color:var(--text-muted)}
.page-heading{background:var(--water);padding:70px 0}.page-heading .wrap{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:end}.page-heading h1{font-size:clamp(3rem,5vw,5.2rem)}.page-heading .intro{font-size:1.15rem;max-width:530px;margin:0}.article-layout{display:grid;grid-template-columns:minmax(0,760px) minmax(220px,1fr);gap:clamp(45px,8vw,120px);padding:65px 0 95px}.article-body{font-size:1.05rem}.article-body h2,.side-note h2{font-family:"Space Grotesk",sans-serif;letter-spacing:-.035em;line-height:1.15}.article-body h2{font-size:2rem;margin:42px 0 15px}.article-body h2:first-child{margin-top:0}.article-body p{margin:0 0 18px}.article-body ul,.article-body ol{padding-left:1.35em}.article-body li{padding-left:.25em;margin:10px 0}.article-body a,.side-note a{color:var(--primary);font-weight:700}.side-note{border-top:3px solid var(--accent);align-self:start;padding-top:18px;font-size:.94rem}.side-note h2{font-size:1.2rem;margin:0 0 12px}.side-note p{color:var(--text-muted)}.side-note ul{padding-left:20px}.source-link{display:inline-block;margin:6px 0}.topic-nav{border-top:1px solid var(--border);margin-top:45px;padding-top:22px}.topic-nav a{font-weight:700}.contact-list{list-style:none;padding:0!important}.contact-list li{padding:12px 0;border-bottom:1px solid var(--border);overflow-wrap:anywhere}
.site-footer{background:#e3ebe4;padding:55px 0 25px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:45px}.footer-grid h2{font-size:.9rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 14px}.footer-grid p{margin:0 0 12px}.footer-grid a{display:block;width:fit-content;margin:7px 0}.footer-bottom{border-top:1px solid #b7c9bf;margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.85rem}.text-button{border:0;background:none;padding:0;text-decoration:underline;cursor:pointer;color:inherit}.cookie-banner{position:fixed;z-index:20;bottom:18px;left:18px;right:18px;background:var(--surface);border:1px solid var(--text);box-shadow:0 10px 35px #102d3030;padding:20px 24px;display:flex;align-items:center;gap:24px;max-width:1050px;margin:auto}.cookie-banner p{margin:0;flex:1;font-size:.9rem}.cookie-actions{display:flex;gap:10px;flex-wrap:wrap}.cookie-actions button{padding:11px 15px;border:1px solid var(--ink);background:var(--ink);color:white;cursor:pointer;font-weight:700}.cookie-actions button+button{background:transparent;color:var(--ink)}.document-body{width:min(760px,90%);margin:70px auto 100px}.document-body h1,.document-body h2{font-family:"Space Grotesk",sans-serif;line-height:1.1}.document-body h1{font-size:3rem}.document-body h2{margin-top:35px}.document-body a{color:var(--primary)}
@media(max-width:800px){.header-inner{align-items:flex-start;gap:20px;flex-wrap:wrap}.nav-links{order:3;width:100%;gap:14px 22px}.nav-drop{left:0}.hero-inner{grid-template-columns:1fr}.hero-copy{padding:60px 5% 35px}.hero-art{min-height:260px;height:300px}.section{padding:60px 0}.section-top{display:block}.section-top p{margin-top:18px}.route-row{grid-template-columns:45px 1fr auto;gap:12px}.route-row p{grid-column:2/3}.route-row .arrow{grid-column:3;grid-row:1}.guide-grid{grid-template-columns:1fr}.guide-link,.guide-link+.guide-link{padding:24px 0;border-left:0;border-bottom:1px solid #75918d}.page-heading .wrap,.article-layout{grid-template-columns:1fr;gap:28px}.page-heading{padding:50px 0}.article-layout{padding:50px 0 70px}.footer-grid{grid-template-columns:1fr 1fr}.cookie-banner{align-items:flex-start;flex-direction:column;gap:14px}.closing{align-items:flex-start;flex-direction:column}}
@media(max-width:480px){.hero h1{font-size:3.3rem}.header-inner{padding:16px 5%}.nav-links{font-size:.85rem}.footer-grid{grid-template-columns:1fr;gap:25px}.cookie-banner{left:8px;right:8px;bottom:8px}.cookie-actions{width:100%}.cookie-actions button{flex:1}.route-row h3{font-size:1.2rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* === OPEN NAVIGATION SURFACE SAFETY === */
/* Position, shadows, borders and scroll treatment belong to the author.
   Only an OPEN mobile menu gets a mandatory opaque readable surface. */
header.site-header[data-pwp-nav-open] {
  background-color: var(--bg, #ffffff) !important;
  isolation: isolate;
}
[data-pwp-mobile-menu][data-pwp-menu-open] {
  background-color: var(--bg, #ffffff);
  color: var(--text, #0f172a);
  max-block-size: var(--pwp-nav-available-height, calc(100dvh - 6rem));
  overflow-y: auto;
  overscroll-behavior: contain;
}
.pwp-source-note {
  margin-block-start: 1rem;
  font-size: .875em;
  line-height: 1.5;
}
.pwp-source-note a { text-decoration: underline; text-underline-offset: .2em; }