/* Fonts: Georgia for titles and numbers, Open Sans (self-hosted) for text. */
@font-face{font-family:'Open Sans';font-style:normal;font-weight:300 800;font-display:swap;src:url(../fonts/open-sans-latin-wght-normal.woff2) format('woff2')}@font-face{font-family:'Open Sans';font-style:italic;font-weight:300 800;font-display:swap;src:url(../fonts/open-sans-latin-wght-italic.woff2) format('woff2')}
/* Global reset and design tokens */
:root{--color-bg:#fff9f4;--color-text-primary:#1a1a1a;--color-text-secondary:#4a4a4a;--color-accent-primary:#111111;--color-accent-warm:#777777;--color-border:#d4d0c8;--color-selection-bg:#111111;--color-selection-text:#fff9f4;--color-cursor:#111111;--color-paper:#faf9f5;--color-soft:#e7e4da;--color-dark:#111111;--color-dark-text:#f7f7f7;--color-white:#ffffff;--color-input-border:#8e8b83;--color-video:#2a2a2a;--color-map-land:#d3d1c7;--color-map-outline:#a6a59d;--color-map-sea:#eeece4;--color-overlay-light:rgba(255,255,255,.82);--color-overlay-white:rgba(255,255,255,.92);--color-overlay-hero-1:rgba(0,0,0,.35);--color-overlay-hero-2:rgba(0,0,0,.15);--color-overlay-hero-3:rgba(0,0,0,.4);--color-overlay-cursor:rgba(36,36,41,.6);--text-page-title:clamp(2.75rem,5.4vw,4.5rem);--text-h2:clamp(1.8rem,3vw,2.8rem);--text-h3:clamp(1.3rem,2vw,1.8rem);--text-body:1.125rem;--text-small:.875rem;--s1:.5rem;--s2:1rem;--s3:1.5rem;--s4:2rem;--s5:3rem;--s6:5rem;--content:82rem;--reading:64rem;--header:5.5rem;--pill:62rem;--ease:250ms ease}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header) + 1rem)}body{margin:0;background:var(--color-bg);color:var(--color-text-primary);font:var(--text-body)/1.65 'Open Sans',Arial,sans-serif}::selection{background:var(--color-selection-bg);color:var(--color-selection-text)}img,svg{max-width:100%}button,input,select{font:inherit;color:inherit}a{color:inherit;text-underline-offset:.2em}button,a{touch-action:manipulation}:focus-visible{outline:0.125rem solid var(--color-accent-primary);outline-offset:0.1875rem}h1,h2,h3{font-family:Georgia,serif;font-weight:400;line-height:1.12}h1{font-size:var(--text-page-title);line-height:1.04;letter-spacing:-.03em;hyphens:auto;overflow-wrap:break-word}h2{font-size:var(--text-h2);letter-spacing:-.02em}h3{font-size:var(--text-h3)}p{max-width:70ch}.eyebrow,.caption,.metadata,.nav-links,.nav-tools,.footer-grid h2,.site-footer ul,.form-label,.map-note{font-family:'Open Sans',Arial,sans-serif;letter-spacing:.04em}.eyebrow,.caption,.metadata{font-size:var(--text-small)}.eyebrow{text-transform:uppercase;letter-spacing:.14em}.container{width:min(calc(100% - 2.5rem),var(--content));margin:auto}.section{padding-block:var(--s6)}.section-heading{max-width:44rem;margin-bottom:var(--s5)}.section-heading .eyebrow{color:var(--color-accent-primary)}.pill{display:inline-flex;align-items:center;justify-content:center;min-height:2.9rem;padding:.72rem 1.5rem;border:0.0625rem solid var(--color-accent-primary);border-radius:var(--pill);background:transparent;color:var(--color-accent-primary);text-decoration:none;transition:background var(--ease),color var(--ease)}.pill:hover{background:var(--color-accent-primary);color:var(--color-bg)}.skip-link{position:fixed;z-index:10001;top:1rem;left:1rem;padding:.7rem 1rem;transform:translateY(-160%);background:var(--color-bg)}.skip-link:focus{transform:translateY(0)}.tag{display:inline-flex;border:0.0625rem solid var(--color-border);border-radius:var(--pill);padding:.35rem .75rem;font:.82rem 'Open Sans',Arial,sans-serif;color:var(--color-accent-primary)}.page-intro{padding:clamp(3.5rem,8vw,7rem) max(1.25rem,calc((100vw - var(--reading))/2)) 3rem}.page-intro h1{margin:0}.page-intro .eyebrow{color:var(--color-accent-primary)}.content-prose{max-width:calc(var(--reading) + 2.5rem);margin:auto;padding:0 1.25rem var(--s6)}.content-prose h2{margin-top:var(--s5)}.content-prose li{margin-block:.5rem}.newsletter-section{background:var(--color-soft)}.newsletter-inner{max-width:48rem}.newsletter-form{display:grid;gap:1.3rem}.form-field{display:grid;gap:.4rem}.newsletter-form input[type=email]{width:100%;min-height:3.5rem;padding:.8rem 1rem;border:0.0625rem solid var(--color-input-border);border-radius:.25rem;background:var(--color-bg)}.consent-label{display:flex;align-items:flex-start;gap:.75rem;font:1rem/1.5 'Open Sans',Arial,sans-serif}.consent-label input{width:1.2rem;height:1.2rem;margin-top:.2rem;accent-color:var(--color-accent-primary)}.newsletter-form .pill{justify-self:start;cursor:pointer}.form-success{margin:0}.form-error{margin:0;font:.9rem/1.5 'Open Sans',Arial,sans-serif;color:#8a251d}.form-honeypot{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}.dgs-placeholder{display:grid;place-items:center;aspect-ratio:16/9;max-width:54rem;margin:2rem auto;background:var(--color-video);color:var(--color-white);border-radius:.6rem}.dgs-placeholder svg{width:3.5rem}.simple-copy{font-size:1.25rem;line-height:1.9}.simple-copy p{margin-bottom:1.75rem}@media(min-width:48rem){.container{width:min(calc(100% - 5rem),var(--content))}.section{padding-block:var(--s6)}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

/* Simulation layout rules */
.sim-shell{max-width:var(--content);margin:auto;padding-inline:1.25rem}.simulation-layout{display:grid;gap:2rem}.simulation-card{padding:1.5rem;border:0.0625rem solid var(--color-border);border-radius:1rem;background:var(--color-bg)}.reactor-svg{width:100%;height:auto}.sim-controls{display:grid;gap:1.1rem}.sim-controls label{display:grid;gap:.35rem;font:1rem 'Open Sans',Arial,sans-serif}.sim-controls input,.sim-controls select{width:100%;accent-color:var(--color-accent-primary)}.sim-readout{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem}.readout-item{padding:.8rem;border-radius:.5rem;background:var(--color-soft)}.readout-item span{display:block;font:.75rem 'Open Sans',Arial,sans-serif;color:var(--color-text-secondary)}.readout-item strong{font-size:1.15rem}.mode-tabs{display:flex;gap:.6rem;margin-bottom:1.2rem}.mode-tabs button{min-height:2.75rem;padding:.65rem 1rem;border:0.0625rem solid var(--color-border);border-radius:var(--pill);background:transparent;cursor:pointer}.mode-tabs button[aria-pressed=true]{background:var(--color-accent-primary);color:var(--color-bg)}.journey{display:grid;gap:1rem;margin-block:var(--s6)}.journey-step{display:grid;gap:.5rem;padding-block:2rem;border-top:0.0625rem solid var(--color-border)}.step-number{font:.8rem 'Open Sans',Arial,sans-serif;letter-spacing:.12em;color:var(--color-accent-warm)}.step-illustration{display:grid;place-items:center;min-height:10rem;border-radius:.8rem;background:var(--color-soft);color:var(--color-accent-primary)}.step-illustration svg{width:9rem;height:7rem}.comparison-box{margin-block:2rem;padding:1.5rem;border-radius:1rem;background:var(--color-soft)}.laser-control[hidden]{display:none}@media(min-width:48rem){.simulation-layout{grid-template-columns:1.4fr .8fr;align-items:start}.journey-step{grid-template-columns:9rem 1fr;align-items:center}.step-illustration{grid-row:span 3;grid-column:1}}

.access-icon-wrap{margin:0 0 1.5rem}.large-access-icon{display:block;width:6rem;height:6rem;object-fit:contain}
/* Refined monochrome controls and newsletter */
.pill{border-radius:.45rem}.newsletter-section{background:var(--color-soft)}.newsletter-section .newsletter-inner{width:min(calc(100% - 2.5rem),var(--content));max-width:var(--content);display:grid;grid-template-columns:minmax(0,1fr) minmax(20rem,.82fr);align-items:center;gap:clamp(2rem,5vw,5rem);padding:clamp(1.5rem,4vw,4rem);border:1px solid var(--color-border);border-radius:1.15rem;background:var(--color-bg);box-shadow:0 1rem 3rem rgba(0,0,0,.07)}.newsletter-section .section-heading{margin:0}.newsletter-section .section-heading h2{max-width:13ch}.newsletter-form input[type=email]{border-radius:.5rem;background:var(--color-bg)}.newsletter-form .pill{border-radius:.45rem;background:#111;color:#fff;border-color:#111}.newsletter-form .pill:hover{background:#444;border-color:#444;color:#fff}.consent-label input{accent-color:#111}@media(max-width:48rem){.newsletter-section .newsletter-inner{grid-template-columns:1fr;width:min(calc(100% - 2.5rem),var(--content))}}/* Keep hover feedback visible on controls. */
.pill,.nav-cta,.modes button,.map-marker{transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease,filter .18s ease}
.pill:hover,.nav-cta:hover{background-color:#242424;border-color:#242424;color:#fff}
.modes button:not(.on):hover{background-color:var(--color-soft);color:var(--color-text-primary)}
.map-marker:hover,.map-marker:focus-visible{background:var(--color-paper);color:var(--color-text-primary);box-shadow:0 2px 10px rgba(0,0,0,.18)}

/* Subpage breadcrumb-style return link. */
.page-back-wrap{width:auto;margin:0 0 1.25rem}
.page-back-link{display:inline-flex;align-items:center;gap:.45rem;min-height:2rem;color:var(--color-text-secondary);font:400 .95rem/1.25 'Open Sans',Arial,sans-serif;text-decoration:none}
.page-back-link:hover{text-decoration:underline;text-underline-offset:.18em;color:var(--color-text-primary)}
.page-back-link:focus-visible{outline:.125rem solid var(--color-accent-primary);outline-offset:.2rem;border-radius:.15rem}


/* Dark call-to-action button, same material as the Simulation button in the navigation. */
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-height: 2.75rem;
  padding: 0.3rem 0.35rem 0.3rem 0.85rem;
  border: 1px solid #494949;
  border-radius: 0.65rem;
  background: linear-gradient(180deg, #454545 0%, #303030 50%, #222 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), inset 0 -2px 0 rgba(0, 0, 0, 0.24),
    0 3px 0 rgba(0, 0, 0, 0.12), 0 6px 14px rgba(0, 0, 0, 0.14);
  color: #fff;
  font: 600 0.92rem / 1.2 'Open Sans', Arial, sans-serif;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.cta-button:hover,
.cta-button:focus-visible {
  border-color: #626262;
  background: linear-gradient(180deg, #555 0%, #3a3a3a 52%, #292929 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -2px 0 rgba(0, 0, 0, 0.2),
    0 4px 0 rgba(0, 0, 0, 0.13), 0 10px 18px rgba(0, 0, 0, 0.2);
  transform: translateY(-1px);
}

.cta-button:active {
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.12);
  transform: translateY(1px);
}

.cta-label {
  flex: 1;
  text-align: center;
}

.cta-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 2rem;
  height: 1.3rem;
  margin-left: 0.5rem;
  border-left: 1px solid rgba(255, 255, 255, 0.28);
}

.cta-button svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (prefers-reduced-motion: reduce) {
  .cta-button { transition: none; }
}
/* Download button on content images (assets/js/main.js) */
.img-download{position:absolute;z-index:3;display:flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;border-radius:.6rem;background:rgba(17,17,17,.82);box-shadow:0 0 0 1px rgba(255,255,255,.4);color:#fff;opacity:0;pointer-events:none;transition:opacity .18s}.img-download svg{width:1.15rem;height:1.15rem;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.img-download.is-visible,.img-download:focus-visible{opacity:1;pointer-events:auto}.img-download:hover{background:#111}
@media(hover:none){.img-download{opacity:.9;pointer-events:auto}}
/* The site's own arrow, replacing the arrow characters: sized and coloured like the text around it. */
.arrow-icon{display:inline-block;width:1em;height:1em;flex:none;fill:currentColor;vertical-align:-.14em}