.skip-link { position: fixed; z-index: 100; top: 12px; left: 12px; transform: translateY(-180%); background: var(--ink); color: var(--white); padding: .75rem 1rem; min-height: 44px; text-decoration: none; transition: transform var(--duration-fast) var(--ease-out), background var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out); }
.skip-link:focus, .skip-link:hover, .skip-link:active { transform: translateY(0); color: var(--white); background: var(--accent-dark); box-shadow: var(--shadow-soft); }
.site-header { position: relative; z-index: 20; border-bottom: 1px solid var(--line); background: rgba(244,246,245,.96); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 2rem; min-height: 88px; }
.brand { display: inline-flex; align-items: center; min-height: 64px; padding: 8px 0; text-decoration: none; }
.brand img { width: auto; height: 3.2rem; }
.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2.6vw, 2.75rem); min-width: 0; }
.site-nav a, .nav-toggle { display: inline-flex; align-items: center; gap: .5rem; min-height: 44px; padding: .55rem .1rem; color: var(--ink); font-family: var(--mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; text-decoration: none; }
.site-nav a { border-bottom: 1px solid transparent; transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease, transform var(--duration-fast) ease; }
.site-nav a:hover { color: var(--accent-dark); border-color: var(--accent); transform: translateY(-1px); }
.site-nav a:active { color: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(0); }
.site-nav a:focus-visible { color: var(--accent-dark); border-color: var(--accent); box-shadow: var(--focus); }
.nav-toggle { display: none; border: 1px solid var(--line); border-radius: var(--radius-input); background: var(--white); transition: background var(--duration-fast) ease, border-color var(--duration-fast) ease, transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease; }
.nav-toggle:hover { background: var(--accent-pale); border-color: var(--accent); transform: translateY(-1px); }
.nav-toggle:active { background: var(--slate); border-color: var(--accent-dark); transform: translateY(0); }
.nav-toggle:focus-visible { background: var(--accent-pale); border-color: var(--accent); box-shadow: var(--focus); }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }
.nav-secondary { display: none; }
.site-header .dateline { color: var(--muted); }
.site-header .header-actions a { color: var(--ink); }
.site-header .header-actions a:hover, .site-header .header-actions a:focus-visible { color: var(--white); background: var(--accent-dark); }
.site-header .header-actions a:active { color: var(--white); background: #044c49; }
.site-nav .nav-link[aria-current="page"] { color: var(--accent-dark); border-color: var(--accent-dark); }

.button, .button-secondary, .text-link { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; min-height: 48px; max-width: 100%; padding: .72rem 1.1rem; border: 1px solid var(--accent); border-radius: var(--radius-input); font-family: var(--mono); font-size: .75rem; font-weight: 500; letter-spacing: .03em; line-height: 1.3; text-align: center; text-decoration: none; transition: background var(--duration-fast) ease, color var(--duration-fast) ease, border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease, transform var(--duration-fast) ease; }
.btn { transition: background 150ms ease, color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease; }
.btn.btn-primary:hover { background: #243640; color: #fff; border-color: #243640; box-shadow: 0 4px 0 #9f432f, 0 7px 16px rgba(36,54,64,.25); }
.btn.btn-primary:active { background: #14252d; color: #fff; border-color: #14252d; box-shadow: inset 0 3px 0 rgba(255,255,255,.3); }
.btn.btn-primary:focus-visible { outline: 2px solid var(--accent-dark); outline-offset: 3px; box-shadow: var(--focus); }
.button, .site-nav .button { background: var(--accent); color: var(--white); }
.button:hover, .site-nav .button:hover { background: #044c49; border-color: #044c49; color: var(--white); transform: translateY(-1px); box-shadow: 0 4px 0 #243640, 0 7px 16px rgba(8,127,121,.25); }
.button:active, .site-nav .button:active { background: #14252d; border-color: #14252d; color: var(--white); transform: translateY(0); box-shadow: inset 0 3px 0 rgba(255,255,255,.3); }
.button:focus-visible, .site-nav .button:focus-visible { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); box-shadow: var(--focus); }
.button-secondary { background: transparent; color: var(--accent-dark); }
.button-secondary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); transform: translateY(-1px); box-shadow: 0 4px 0 var(--ink); }
.button-secondary:active { background: #14252d; border-color: #14252d; color: var(--white); transform: translateY(0); box-shadow: inset 0 3px 0 rgba(255,255,255,.3); }
.button-secondary:focus-visible { background: var(--accent-pale); border-color: var(--accent-dark); box-shadow: var(--focus); }
.text-link { min-height: 44px; padding: .55rem 0; border-color: transparent; color: var(--accent-dark); justify-content: flex-start; }
.text-link:hover { color: var(--ink); border-color: var(--accent); transform: translateY(-1px); }
.text-link:active { color: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(0); }
.text-link:focus-visible { color: var(--ink); border-color: var(--accent); box-shadow: var(--focus); }

.directory { border-top: 1px solid var(--ink); }
.directory-row { display: grid; grid-template-columns: 5rem minmax(0, 1fr) minmax(12rem, .75fr) auto; align-items: center; gap: 1.5rem; min-width: 0; padding: 1.45rem 0; border-bottom: 1px solid var(--line); }
.directory-row:hover { background: var(--white); }
.directory-number { color: var(--accent-dark); font-family: var(--mono); font-size: .78rem; }
.directory-title { margin: 0; font-family: var(--display); font-size: clamp(1.15rem, 2vw, 1.8rem); letter-spacing: -.03em; }
.directory-description { margin: 0; color: var(--muted); font-size: .98rem; line-height: 1.35; }
.directory-row .icon { color: var(--accent); }
.directory-row > * { min-width: 0; }
.directory-subjects { display: flex; flex-wrap: wrap; gap: .25rem .75rem; margin-top: .55rem; font-size: .9rem; }
.directory-subjects a { color: var(--muted); }
.directory-subjects a:hover { color: var(--accent-dark); }

.image-frame { margin: 0; }
.image-frame img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.image-frame figcaption { padding-top: .8rem; color: var(--muted); font-family: var(--mono); font-size: .7rem; line-height: 1.45; }
.editorial-image { border: 1px solid var(--line); background: var(--slate); padding: clamp(.4rem, 1vw, .8rem); }
.editorial-image img { width: 100%; }

.callout { border-left: 2px solid var(--accent); background: var(--white); padding: clamp(1.25rem, 3vw, 2.5rem); }
.callout h2, .callout h3 { max-width: 20ch; }
.callout p:last-child { margin-bottom: 0; }
.note { color: var(--muted); font-size: .92rem; }
.tag { display: inline-flex; align-items: center; min-height: 32px; padding: .35rem .65rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-family: var(--mono); font-size: .68rem; line-height: 1.25; }
.tag:hover { background: var(--accent-pale); border-color: var(--accent); color: var(--accent-dark); }
.tag:active { background: var(--slate); border-color: var(--accent-dark); color: var(--ink); }
.tag:focus-visible { background: var(--accent-pale); border-color: var(--accent); box-shadow: var(--focus); }

.form-panel { background: var(--white); border: 1px solid var(--line); padding: clamp(1.25rem, 4vw, 3rem); box-shadow: var(--shadow-soft); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.form-field { min-width: 0; }
.form-field.full { grid-column: 1 / -1; }
.form-field label, .form-label { margin-bottom: .42rem; font-family: var(--mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; }
.form-field input, .form-field select, .form-field textarea { transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease, background var(--duration-fast) ease; }
.form-field input:hover, .form-field select:hover, .form-field textarea:hover { border-color: var(--accent); background: #fcfefe; }
.form-field input:active, .form-field select:active, .form-field textarea:active { border-color: var(--accent-dark); background: var(--white); }
.form-field input:focus-visible, .form-field select:focus-visible, .form-field textarea:focus-visible { border-color: var(--accent); background: var(--white); box-shadow: var(--focus); }
.form-field input[aria-invalid="true"], .form-field select[aria-invalid="true"], .form-field textarea[aria-invalid="true"] { border-color: #9a3a32; }
.form-error { margin: .35rem 0 0; color: #8b302a; font-size: .87rem; }
.form-help { margin: .35rem 0 0; color: var(--muted); font-size: .87rem; }
.checkbox-field { display: flex; align-items: flex-start; gap: .7rem; }
.checkbox-field input { width: 1.15rem; height: 1.15rem; flex: 0 0 auto; margin-top: .2rem; accent-color: var(--accent); }
.checkbox-field label { margin: 0; font-family: var(--body); font-size: .98rem; letter-spacing: 0; text-transform: none; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-top: 1.5rem; }
.form-status { color: var(--muted); font-size: .9rem; }

.spec-table { overflow-x: auto; border-top: 1px solid var(--line); }
.spec-table table { min-width: 440px; }
.spec-table th { width: 32%; }
.spec-table th, .spec-table td { padding-block: 1rem; }
.spec-code { color: var(--accent-dark); font-family: var(--mono); font-size: .85rem; }

.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 60px; padding: .8rem 0; cursor: pointer; font-family: var(--display); font-size: clamp(1.1rem, 2vw, 1.45rem); font-weight: 600; list-style: none; transition: color var(--duration-fast) ease, background var(--duration-fast) ease, padding var(--duration-fast) ease; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--accent-dark); padding-left: .35rem; }
.faq-item summary:active { color: var(--ink); background: var(--slate); padding-left: .35rem; }
.faq-item summary:focus-visible { color: var(--accent-dark); box-shadow: var(--focus); }
.faq-item summary .icon-minus { display: none; }
.faq-item[open] summary .icon-plus { display: none; }
.faq-item[open] summary .icon-minus { display: block; }
.faq-answer { padding: 0 3rem 1.3rem 0; }
.faq-answer p:last-child { margin-bottom: 0; }

.sticky-figure { position: sticky; top: 2rem; align-self: start; }
.sticky-figure .image-frame { position: relative; }
.sticky-figure .progress-track { margin-top: 1rem; }
.sticky-caption { color: var(--muted); font-family: var(--mono); font-size: .7rem; }

.site-footer { margin-top: var(--section); background: var(--ink); color: var(--white); }
.footer-main { display: grid; grid-template-columns: minmax(12rem, .8fr) minmax(0, 1.2fr); gap: clamp(2rem, 8vw, 10rem); padding-block: clamp(3rem, 7vw, 7rem); }
.footer-brand img { width: auto; height: 4rem; }
.shell.footer-main { grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); gap: 2rem; padding-block: 2.5rem; }
.shell.footer-main .footer-brand { grid-column: auto; }
.shell.footer-main address.footer-contact { display: flex; flex-direction: column; align-items: flex-start; gap: .35rem; }
.shell.footer-main address.footer-contact a { display: flex; align-items: center; gap: .5rem; overflow-wrap: anywhere; }
.shell.footer-bottom { padding-block: 1rem; }
.shell.footer-bottom .legal-links { margin: 0; }
.footer-brand p { max-width: 30ch; color: #c4d0d2; font-size: .95rem; }
.footer-contact { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.footer-label { margin-bottom: .6rem; color: #9fb5b8; font-family: var(--mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; }
.footer-contact a, .footer-contact address { display: block; min-height: 44px; color: var(--white); text-decoration-color: #719a9a; }
.footer-contact a:hover { color: #a9ece7; }
.footer-contact a:active { color: var(--white); }
.footer-contact a:focus-visible { color: #a9ece7; box-shadow: 0 0 0 3px var(--ink), 0 0 0 5px #a9ece7; }
.footer-links { display: flex; flex-wrap: wrap; gap: .5rem 1.2rem; padding-block: 1.25rem; border-top: 1px solid #52646a; }
.footer-links a, .footer-links button { min-height: 44px; padding: .55rem 0; border: 0; background: transparent; color: #d4dfe0; font-size: .88rem; text-decoration: underline; text-decoration-color: #6a8587; text-underline-offset: .18em; transition: color var(--duration-fast) ease, background var(--duration-fast) ease, box-shadow var(--duration-fast) ease; }
.footer-links a:hover, .footer-links button:hover { color: #a9ece7; background: rgba(255,255,255,.06); }
.footer-links a:active, .footer-links button:active { color: var(--white); background: rgba(255,255,255,.1); }
.footer-links a:focus-visible, .footer-links button:focus-visible { color: #a9ece7; box-shadow: 0 0 0 3px var(--ink), 0 0 0 5px #a9ece7; }
.footer-bottom { padding-block: 1rem; border-top: 1px solid #52646a; color: #aababc; font-family: var(--mono); font-size: .68rem; }

.cookie-banner { position: fixed; z-index: 70; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1rem; padding: .7rem var(--gutter); border-top: 1px solid var(--line); background: var(--white); box-shadow: 0 -8px 28px rgba(36,54,64,.12); }
.cookie-banner[aria-hidden="true"] { display: none; }
.cookie-banner .cookie-inner { width: 100%; min-height: 0; padding: 0; }
.cookie-copy { margin: 0; color: var(--ink); font-size: .88rem; line-height: 1.35; }
.cookie-copy a { color: var(--accent-dark); }
.cookie-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .45rem; }
.cookie-actions button { min-height: 44px; padding: .55rem .75rem; border: 1px solid var(--line); border-radius: var(--radius-input); background: var(--white); color: var(--ink); font-family: var(--mono); font-size: .68rem; line-height: 1.2; transition: background var(--duration-fast) ease, border-color var(--duration-fast) ease, color var(--duration-fast) ease, box-shadow var(--duration-fast) ease, transform var(--duration-fast) ease; }
.cookie-actions button:hover { background: var(--accent-pale); border-color: var(--accent); color: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 3px 0 var(--accent-dark); }
.cookie-actions button:active { background: var(--slate); border-color: var(--accent-dark); color: var(--ink); transform: translateY(0); box-shadow: inset 0 2px 3px rgba(36,54,64,.25); }
.cookie-actions button:focus-visible { background: var(--accent-pale); border-color: var(--accent); box-shadow: var(--focus); }
.cookie-actions .cookie-allow { border-color: var(--accent); background: var(--accent); color: var(--white); }
.cookie-actions .cookie-allow:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); }
.cookie-actions .cookie-allow:active { background: #044c49; border-color: #044c49; color: var(--white); }
.cookie-actions .cookie-allow:focus-visible { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); box-shadow: var(--focus); }

.chat-widget { position: fixed; right: var(--gutter); bottom: 1rem; z-index: 60; }
.chat-launcher { display: inline-flex; align-items: center; gap: .55rem; min-height: 48px; max-width: min(17rem, calc(100vw - 2 * var(--gutter))); padding: .7rem 1rem; border: 1px solid var(--ink); border-radius: 999px; background: var(--ink); color: var(--white); font-family: var(--mono); font-size: .72rem; line-height: 1.2; transition: background var(--duration-fast) ease, border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease, transform var(--duration-fast) ease; }
.chat-launcher:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); transform: translateY(-2px); box-shadow: 0 7px 18px rgba(36,54,64,.2); }
.chat-launcher:active { background: #14252d; border-color: #14252d; color: var(--white); transform: translateY(0); box-shadow: none; }
.chat-launcher:focus-visible { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); box-shadow: 0 0 0 3px var(--paper), 0 0 0 5px var(--accent); }
.chat-count { display: inline-flex; min-width: 1.35rem; min-height: 1.35rem; align-items: center; justify-content: center; padding: .1rem .3rem; border-radius: 50%; background: #a9ece7; color: var(--ink); font-size: .65rem; }
.chat-panel[aria-hidden="true"] { display: none !important; }
body > .chat-panel { position: fixed; right: var(--gutter); bottom: 5.5rem; overflow-y: auto; }
.chat-panel .chat-head, .chat-panel .chat-close { color: var(--ink); }
.chat-panel .chat-close:hover, .chat-panel .chat-close:focus-visible { color: var(--accent-dark); background: var(--accent-pale); }
.chat-panel .chat-close:active { color: var(--ink); background: var(--slate); }
body > .chat-panel .chat-form[hidden] { display: none !important; }
body > .chat-panel > * { flex-shrink: 0; }
body > .chat-panel .chat-messages { min-height: 4rem; }
body > .chat-launcher { white-space: nowrap; width: auto; max-width: calc(100vw - 2 * var(--gutter)); background: var(--ink); color: var(--white); }
body > .chat-launcher:hover, body > .chat-launcher:focus-visible { background: var(--accent-dark); color: var(--white); }
body > .chat-launcher:active { background: #14252d; color: var(--white); }
body > .chat-launcher .launcher-text { display: inline; }
.chat-widget .chat-launcher { position: relative; right: auto; bottom: auto; }
.chat-panel { position: absolute; right: 0; bottom: calc(100% + .75rem); display: flex; flex-direction: column; width: min(25rem, calc(100vw - 2 * var(--gutter))); max-height: min(38rem, calc(100vh - 8rem)); border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow-card); }
.chat-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem; border-bottom: 1px solid var(--line); background: var(--paper); }
.chat-head h2 { margin: 0; font-size: 1.15rem; }
.chat-close { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: .5rem; border: 1px solid var(--line); border-radius: var(--radius-input); background: var(--white); transition: background var(--duration-fast) ease, border-color var(--duration-fast) ease, transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease; }
.chat-close:hover { background: var(--accent-pale); border-color: var(--accent); transform: translateY(-1px); }
.chat-close:active { background: var(--slate); border-color: var(--accent-dark); transform: translateY(0); }
.chat-close:focus-visible { background: var(--accent-pale); border-color: var(--accent); box-shadow: var(--focus); }
.chat-transcript { min-height: 9rem; overflow: auto; padding: 1rem; }
.chat-message { max-width: 88%; margin: 0 0 .7rem; padding: .65rem .75rem; border: 1px solid var(--line); border-radius: 2px; font-size: .92rem; }
.chat-message.user { margin-left: auto; border-color: var(--accent); background: var(--accent-pale); }
.chat-message time { display: block; margin-top: .3rem; color: var(--muted); font-family: var(--mono); font-size: .65rem; }
.chat-form { display: grid; gap: .65rem; padding: 1rem; border-top: 1px solid var(--line); }
.chat-form textarea { min-height: 5rem; }
.chat-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.chat-fields input { min-width: 0; padding: .6rem; font-size: .9rem; }
.chat-fallback { padding: 0 1rem 1rem; color: var(--muted); font-size: .82rem; }
.chat-fallback a { color: var(--accent-dark); }

@media (max-width: 760px) {
  .header-inner { min-height: 76px; }
  .site-nav { display: none; position: absolute; top: 100%; right: 0; left: 0; flex-direction: column; align-items: stretch; gap: 0; padding: .6rem var(--gutter) 1rem; border-bottom: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow-soft); }
  .site-nav[data-open="true"] { display: flex; }
  .site-nav a { padding: .7rem 0; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: inline-flex; }
  .directory-row { grid-template-columns: 3rem minmax(0, 1fr) auto; gap: .7rem; }
  .directory-description { grid-column: 2 / -1; }
  .directory-row .text-link { grid-column: 2 / -1; justify-content: flex-start; }
  .footer-main { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 520px) {
  .form-grid, .footer-contact, .chat-fields { grid-template-columns: 1fr; }
  .form-field.full { grid-column: auto; }
  .cookie-banner { grid-template-columns: 1fr; gap: .45rem; padding-block: .65rem; }
  .cookie-banner .cookie-actions { display: flex !important; flex-wrap: wrap; justify-content: flex-start; }
  .cookie-banner .cookie-actions button { flex: 1 1 10rem; min-width: min(100%, 10rem) !important; overflow-wrap: normal !important; padding-inline: .75rem !important; }
  .cookie-banner .cookie-actions [data-334f1b-open] { display: none; }
  .cookie-banner[data-334f1b] { max-height: none; }
  .chat-widget { right: var(--gutter); bottom: 5.2rem; }
  .chat-launcher { width: auto; max-width: calc(100vw - 2 * var(--gutter)); overflow: visible; padding-inline: .8rem; white-space: nowrap; }
  .chat-launcher .chat-label { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .chat-panel, .site-nav { transition: none; }
}