/* АСГАРДБУД — «Крижана сталь». Black/white base, one steel accent, engineering-drawing grid.
   Layout: dark header + dark heroes, alternating light/dark sections, 1240px container, 12-col feel via CSS grid. */
:root {
  --ab-black: #0B0B0C; --ab-white: #F4F6F8; --ab-paper: #FFFFFF;
  --ab-steel: #7FA8C9; --ab-steel-ink: #35618A;
  --ab-steel-50: #F0F5F9; --ab-steel-100: #DEE9F2; --ab-steel-200: #C1D6E6; --ab-steel-400: #9BBBD4;
  --ab-steel-600: #427EAE; --ab-steel-800: #274B68; --ab-steel-900: #1B3041;
  --ab-gray-50: #F5F6F7; --ab-gray-100: #EBEDEF; --ab-gray-200: #D8DCDF; --ab-gray-300: #B6BDC3;
  --ab-gray-400: #8F9AA3; --ab-gray-500: #6A7781; --ab-gray-600: #4E585F; --ab-gray-700: #373E43;
  --ab-gray-800: #22272A; --ab-gray-900: #151719;
  --ab-success: #2E7D5B; --ab-warning: #C98A1E; --ab-warning-ink: #9A6A12; --ab-danger: #C8473A;

  --font-display: "Unbounded", "Segoe UI", system-ui, sans-serif;
  --font-body: "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;

  --container: 1240px; --gutter: clamp(16px, 4vw, 40px);
  --header-h: 72px;
  --step--1: .875rem; --step-0: 1rem; --step-1: 1.125rem; --step-2: 1.375rem;
  --step-3: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); --step-4: clamp(1.9rem, 1.4rem + 2.2vw, 2.9rem);
  --step-5: clamp(2.3rem, 1.5rem + 3.6vw, 4.2rem);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ab-white); color: var(--ab-black); font: 400 var(--step-0)/1.65 var(--font-body); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ab-steel-ink); text-underline-offset: .2em; }
a:hover { color: var(--ab-steel-600); }
:focus-visible { outline: 2px solid var(--ab-steel); outline-offset: 2px; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0 0 .6em; text-wrap: balance; letter-spacing: -.005em; }
h1 { font-size: var(--step-5); font-weight: 700; }
h2 { font-size: var(--step-4); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }
p { margin: 0 0 1em; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--ab-steel); color: var(--ab-black); padding: 10px 14px; font-weight: 700; }
.skip:focus { left: 8px; }
.container { width: 100%; max-width: calc(var(--container) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.eyebrow { font: 500 .75rem/1.4 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ab-steel-ink); margin: 0 0 14px; }
.dark .eyebrow, .eyebrow.on-dark { color: var(--ab-steel); }
.mono { font-family: var(--font-mono); font-size: .8125rem; letter-spacing: .02em; }
.lead { font-size: var(--step-1); line-height: 1.6; max-width: 62ch; color: var(--ab-gray-600); }
.dark .lead { color: var(--ab-gray-300); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------------------------------------------------------------- buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; font: 700 .9375rem/1 var(--font-body); padding: 15px 22px; border: 1px solid transparent; text-decoration: none; cursor: pointer; transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease); border-radius: 2px; }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-steel { background: var(--ab-steel); color: var(--ab-black); }
.btn-steel:hover { background: var(--ab-steel-400); color: var(--ab-black); }
.btn-black { background: var(--ab-black); color: var(--ab-white); }
.btn-black:hover { background: var(--ab-gray-800); color: var(--ab-white); }
.btn-ghost { border-color: var(--ab-gray-700); color: var(--ab-white); background: transparent; }
.btn-ghost:hover { border-color: var(--ab-steel); color: var(--ab-white); }
.btn-ghost-dark { border-color: var(--ab-gray-300); color: var(--ab-black); background: transparent; }
.btn-ghost-dark:hover { border-color: var(--ab-steel-ink); color: var(--ab-steel-ink); }
.btn-sm { padding: 11px 16px; font-size: .875rem; }
.link-arrow { font-weight: 700; text-decoration: none; display: inline-flex; gap: 8px; align-items: center; }
.link-arrow::after { content: "→"; transition: transform .2s var(--ease); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ---------------------------------------------------------------- header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(11, 11, 12, .96); color: var(--ab-white); border-bottom: 1px solid var(--ab-gray-800); backdrop-filter: saturate(1.2) blur(6px); }
.header-row { display: flex; align-items: center; gap: 28px; min-height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ab-white); text-decoration: none; flex: none; }
.brand img { height: 40px; width: auto; }
.brand-word { font: 700 1rem/1 var(--font-display); letter-spacing: .06em; }
.main-nav { flex: 1; }
.main-nav > ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.main-nav a, .nav-trigger { color: var(--ab-gray-300); text-decoration: none; font: 500 .9375rem/1 var(--font-body); padding: 12px 12px; display: inline-flex; align-items: center; gap: 6px; background: none; border: 0; cursor: pointer; }
.main-nav a:hover, .nav-trigger:hover, .main-nav a[aria-current="page"], .nav-trigger[aria-expanded="true"] { color: var(--ab-white); }
.main-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--ab-steel); }
.nav-trigger svg { width: 12px; height: 12px; transition: transform .2s; }
.nav-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }
.has-mega { position: static; }
.mega { position: absolute; left: 0; right: 0; top: 100%; background: var(--ab-black); border-top: 1px solid var(--ab-gray-800); border-bottom: 1px solid var(--ab-gray-800); padding: 36px 0 40px; display: none; }
.mega.open { display: block; }
.mega-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 28px; }
.mega h3 { font: 500 .75rem/1.4 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ab-steel); margin: 0 0 12px; }
.mega ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.mega ul a { padding: 8px 0; color: var(--ab-gray-200); display: block; }
.mega ul a:hover { color: var(--ab-white); }
.mega .mega-all { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--ab-gray-800); }
.header-actions { display: flex; align-items: center; gap: 10px; flex: none; }
.lang-switch { display: flex; font: 500 .75rem/1 var(--font-mono); letter-spacing: .08em; border: 1px solid var(--ab-gray-800); }
.lang-switch a, .lang-switch span { padding: 9px 10px; text-decoration: none; color: var(--ab-gray-400); }
.lang-switch span { color: var(--ab-black); background: var(--ab-steel); }
.lang-switch a:hover { color: var(--ab-white); }
.btn-panel { border: 1px solid var(--ab-gray-700); color: var(--ab-gray-200); padding: 10px 14px; font-size: .875rem; }
.btn-panel:hover { border-color: var(--ab-steel); color: var(--ab-white); }
.burger { display: none; background: none; border: 1px solid var(--ab-gray-700); color: var(--ab-white); width: 44px; height: 44px; cursor: pointer; }
.burger svg { width: 22px; height: 22px; margin: auto; }

@media (max-width: 1180px) {
  .main-nav, .header-actions .btn-cta, .header-actions .btn-panel { display: none; }
  .burger { display: grid; }
  .header-row { justify-content: space-between; }
  .site-header.menu-open .main-nav { display: block; position: fixed; inset: var(--header-h) 0 0 0; background: var(--ab-black); overflow-y: auto; padding: 16px var(--gutter) 40px; }
  .site-header.menu-open .main-nav > ul { flex-direction: column; gap: 0; }
  .site-header.menu-open .main-nav a, .site-header.menu-open .nav-trigger { width: 100%; padding: 16px 0; font-size: 1.0625rem; border-bottom: 1px solid var(--ab-gray-800); justify-content: space-between; }
  .site-header.menu-open .mega { position: static; padding: 8px 0 16px; border: 0; }
  .site-header.menu-open .mega-grid { grid-template-columns: 1fr; gap: 18px; }
  .site-header.menu-open .mega ul a { border: 0; padding: 8px 0; font-size: 1rem; }
  .mobile-extra { display: grid; gap: 12px; margin-top: 24px; }
}
@media (min-width: 1181px) { .mobile-extra { display: none; } }
.mobile-extra .btn { justify-content: center; }

/* ---------------------------------------------------------------- hero (home) */
.hero { position: relative; background: var(--ab-black); color: var(--ab-white); overflow: hidden; isolation: isolate; }
.hero-slides { position: absolute; inset: 0; z-index: -2; }
.hero-slide { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0; transition: opacity 1.6s ease; transform: scale(1.04); }
.hero-slide.active { opacity: 1; animation: kenburns 9s ease-out forwards; }
@keyframes kenburns { from { transform: scale(1.08); } to { transform: scale(1.02); } }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(90deg, rgba(11,11,12,.94) 0%, rgba(11,11,12,.82) 42%, rgba(11,11,12,.45) 100%),
              linear-gradient(0deg, rgba(11,11,12,.9) 0%, rgba(11,11,12,0) 40%); }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(127,168,201,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(127,168,201,.07) 1px, transparent 1px);
  background-size: 72px 72px; }
.hero-inner { padding-block: clamp(72px, 12vw, 150px) clamp(48px, 7vw, 80px); display: grid; gap: 28px; }
.hero h1 { max-width: 15ch; margin: 0; }
.hero h1 em, .page-hero h1 em { font-style: normal; color: var(--ab-steel); }
.hero .lead { color: var(--ab-gray-200); max-width: 56ch; margin: 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-meta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 30px; margin-top: clamp(28px, 6vw, 70px); padding-top: 18px; border-top: 1px solid rgba(127,168,201,.35); color: var(--ab-gray-400); }
.hero-caption { display: flex; align-items: center; gap: 14px; }
.hero-dots { display: flex; gap: 6px; }
.hero-dots button { width: 22px; height: 3px; padding: 0; border: 0; background: var(--ab-gray-700); cursor: pointer; }
.hero-dots button.active { background: var(--ab-steel); }
.cert-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.cert-badge { display: inline-flex; align-items: center; gap: 10px; border: 1px solid var(--ab-gray-700); padding: 8px 12px; font: 500 .75rem/1.2 var(--font-mono); letter-spacing: .06em; color: var(--ab-gray-200); text-transform: uppercase; background: rgba(11,11,12,.5); }
.cert-badge b { color: var(--ab-steel); font-weight: 500; }

/* ---------------------------------------------------------------- inner page hero */
.page-hero { position: relative; background: var(--ab-black); color: var(--ab-white); isolation: isolate; overflow: hidden; }
.page-hero-bg { position: absolute; inset: 0; z-index: -2; background-size: cover; background-position: center; }
.page-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(11,11,12,.95) 0%, rgba(11,11,12,.85) 50%, rgba(11,11,12,.6) 100%); }
.page-hero-inner { padding-block: clamp(36px, 6vw, 64px) clamp(44px, 7vw, 80px); }
.page-hero h1 { font-size: var(--step-4); max-width: 22ch; margin-bottom: 18px; }
.page-hero .lead { color: var(--ab-gray-200); margin: 0; }
.page-hero.compact .page-hero-inner { padding-bottom: clamp(32px, 5vw, 56px); }
.breadcrumbs { font: 500 .75rem/1.4 var(--font-mono); letter-spacing: .04em; color: var(--ab-gray-400); margin-bottom: clamp(26px, 5vw, 48px); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: 6px; color: var(--ab-gray-600); }
.breadcrumbs a { color: var(--ab-gray-300); text-decoration: none; }
.breadcrumbs a:hover { color: var(--ab-steel); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.tag { font: 500 .75rem/1 var(--font-mono); letter-spacing: .04em; border: 1px solid var(--ab-gray-700); color: var(--ab-gray-300); padding: 7px 10px; }
.light .tag, .tag.on-light { border-color: var(--ab-gray-200); color: var(--ab-gray-600); background: var(--ab-paper); }

/* ---------------------------------------------------------------- sections */
.section { padding-block: clamp(64px, 9vw, 120px); }
.section.tight { padding-block: clamp(48px, 6vw, 80px); }
.dark { background: var(--ab-black); color: var(--ab-white); }
.dark a:not(.btn) { color: var(--ab-steel); }
.paper { background: var(--ab-paper); }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px 60px; align-items: end; margin-bottom: clamp(36px, 5vw, 60px); }
.section-head h2 { margin: 0; }
.section-head .lead { margin: 0; }
@media (max-width: 860px) { .section-head { grid-template-columns: 1fr; } }
.rune-rule { display: flex; align-items: center; gap: 16px; color: var(--ab-steel); margin-block: 0 clamp(28px, 4vw, 44px); }
.rune-rule::before, .rune-rule::after { content: ""; height: 1px; background: currentColor; flex: 1; opacity: .55; }
.rune-rule img { width: auto; height: 22px; opacity: .9; }
.light-rule .rune-rule, .rune-rule.on-light { color: var(--ab-steel-ink); }

/* ---------------------------------------------------------------- service groups / cards */
.groups { display: grid; gap: clamp(36px, 5vw, 56px); }
.group-row { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px 40px; padding-top: 22px; border-top: 1px solid var(--ab-gray-200); }
.dark .group-row { border-color: var(--ab-gray-800); }
.group-row > h3 { font: 500 .8125rem/1.4 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ab-steel-ink); margin: 6px 0 0; }
.dark .group-row > h3 { color: var(--ab-steel); }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--ab-gray-200); border: 1px solid var(--ab-gray-200); }
.dark .cards { background: var(--ab-gray-800); border-color: var(--ab-gray-800); }
.card { background: var(--ab-paper); display: flex; flex-direction: column; text-decoration: none; color: var(--ab-black); min-width: 0; transition: background .25s var(--ease); }
.dark .card { background: var(--ab-black); color: var(--ab-white); }
.card:hover { background: var(--ab-steel-50); color: var(--ab-black); }
.dark .card:hover { background: var(--ab-gray-900); color: var(--ab-white); }
.card-img { aspect-ratio: 16 / 9; overflow: hidden; background: var(--ab-gray-800); }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.card:hover .card-img img { transform: scale(1.04); }
.card-body { padding: 22px 22px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card h3, .card h4 { font-size: 1.125rem; margin: 0; }
.card p { margin: 0; color: var(--ab-gray-600); font-size: .9375rem; }
.dark .card p { color: var(--ab-gray-400); }
.card .link-arrow { margin-top: auto; padding-top: 8px; color: var(--ab-steel-ink); font-size: .9375rem; }
.dark .card .link-arrow { color: var(--ab-steel); }
@media (max-width: 1000px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } .group-row { grid-template-columns: 1fr; } }
@media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- brands band */
.brand-split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--ab-gray-800); border: 1px solid var(--ab-gray-800); }
.brand-tile { background: var(--ab-black); padding: clamp(26px, 4vw, 44px); display: flex; flex-direction: column; gap: 14px; color: var(--ab-white); text-decoration: none; position: relative; min-width: 0; }
.brand-tile:hover { background: var(--ab-gray-900); color: var(--ab-white); }
.brand-name { font: 700 clamp(1.8rem, 1.3rem + 2vw, 2.8rem)/1 var(--font-display); letter-spacing: .02em; }
.brand-tile p { color: var(--ab-gray-400); margin: 0; }
.brand-tile .tag { align-self: flex-start; border-color: var(--ab-steel); color: var(--ab-steel); }
.brand-tile .link-arrow { margin-top: auto; color: var(--ab-steel); }
@media (max-width: 760px) { .brand-split { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- split blocks */
.split { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.split.reverse > :first-child { order: 2; }
.split-media { position: relative; }
.split-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.split-media .media-caption { position: absolute; left: 0; bottom: 0; background: var(--ab-black); color: var(--ab-gray-300); padding: 10px 14px; font: 500 .75rem/1.3 var(--font-mono); letter-spacing: .04em; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .split.reverse > :first-child { order: 0; } }
.checklist { list-style: none; margin: 0 0 1.4em; padding: 0; display: grid; gap: 12px; }
.checklist li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 12px; align-items: start; }
.checklist li::before { content: ""; width: 14px; height: 14px; margin-top: 6px; border: 2px solid var(--ab-steel); transform: rotate(45deg); }
.checklist b { font-weight: 700; }

/* ---------------------------------------------------------------- AB-ALERT widget */
.alert-widget { border: 1px solid var(--ab-gray-700); background: var(--ab-gray-900); color: var(--ab-white); padding: 22px 24px; display: grid; gap: 14px; max-width: 460px; }
.alert-widget-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font: 500 .75rem/1.3 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ab-gray-400); }
.alert-widget-head b { color: var(--ab-steel); font-weight: 500; }
.alert-state { display: flex; align-items: center; gap: 16px; }
.alert-dot { width: 18px; height: 18px; border-radius: 50%; background: var(--ab-gray-600); flex: none; position: relative; }
.alert-dot::after { content: ""; position: absolute; inset: -6px; border-radius: 50%; border: 2px solid currentColor; opacity: 0; color: var(--ab-gray-600); }
.alert-widget[data-state="RED"] .alert-dot { background: var(--ab-danger); }
.alert-widget[data-state="RED"] .alert-dot::after { color: var(--ab-danger); animation: pulse 1.8s ease-out infinite; }
.alert-widget[data-state="YELLOW"] .alert-dot { background: var(--ab-warning); }
.alert-widget[data-state="YELLOW"] .alert-dot::after { color: var(--ab-warning); animation: pulse 2.4s ease-out infinite; }
.alert-widget[data-state="CLEAR"] .alert-dot { background: var(--ab-success); }
@keyframes pulse { from { transform: scale(.7); opacity: .9; } to { transform: scale(1.5); opacity: 0; } }
.alert-label { font: 600 clamp(1.3rem, 1rem + 1.2vw, 1.75rem)/1.15 var(--font-display); }
.alert-city { font: 500 .8125rem/1 var(--font-mono); color: var(--ab-gray-300); margin-top: 6px; display: block; letter-spacing: .04em; }
.alert-widget-foot { font-size: .8125rem; color: var(--ab-gray-400); border-top: 1px solid var(--ab-gray-800); padding-top: 12px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

/* ---------------------------------------------------------------- process */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--ab-gray-200); }
.dark .steps { border-color: var(--ab-gray-800); }
.step { padding: 26px 26px 10px 0; border-right: 1px solid var(--ab-gray-200); padding-left: 26px; min-width: 0; }
.dark .step { border-color: var(--ab-gray-800); }
.step:first-child { padding-left: 0; }
.step:last-child { border-right: 0; }
.step-num { font: 700 2.4rem/1 var(--font-display); color: var(--ab-steel-ink); margin-bottom: 18px; display: block; }
.dark .step-num { color: var(--ab-steel); }
.step h3 { font-size: 1.125rem; }
.step p { color: var(--ab-gray-600); font-size: .9375rem; }
.dark .step p { color: var(--ab-gray-400); }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } .step:nth-child(2) { border-right: 0; } .step:nth-child(3) { padding-left: 0; } .step:nth-child(n+3) { border-top: 1px solid var(--ab-gray-200); } .dark .step:nth-child(n+3) { border-color: var(--ab-gray-800); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } .step { border-right: 0; padding-left: 0; border-top: 1px solid var(--ab-gray-200); } .step:first-child { border-top: 0; } }

/* ---------------------------------------------------------------- feature grid */
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(26px, 4vw, 44px) clamp(24px, 4vw, 48px); }
.feature { min-width: 0; padding-top: 20px; border-top: 2px solid var(--ab-steel); }
.feature h3 { font-size: 1.0625rem; }
.feature p { color: var(--ab-gray-600); font-size: .9375rem; margin: 0; }
.dark .feature p { color: var(--ab-gray-400); }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- content layout (service / article) */
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: clamp(32px, 5vw, 72px); align-items: start; }
.aside-sticky { position: sticky; top: calc(var(--header-h) + 24px); display: grid; gap: 22px; }
@media (max-width: 1000px) { .content-grid { grid-template-columns: 1fr; } .aside-sticky { position: static; } }
.aside-box { background: var(--ab-paper); border: 1px solid var(--ab-gray-200); padding: 24px; }
.aside-box h3 { font: 500 .75rem/1.4 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ab-steel-ink); margin-bottom: 16px; }
.aside-box.dark-box { background: var(--ab-black); color: var(--ab-white); border-color: var(--ab-black); }
.aside-box.dark-box h3 { color: var(--ab-steel); }
.aside-box.dark-box p { color: var(--ab-gray-300); font-size: .9375rem; }
.aside-box ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-size: .9375rem; }
.aside-box .checklist { gap: 10px; font-size: .9375rem; margin: 0; }
.toc a { text-decoration: none; color: var(--ab-gray-600); display: block; padding: 4px 0 4px 14px; border-left: 2px solid var(--ab-gray-200); }
.toc a:hover { color: var(--ab-steel-ink); border-color: var(--ab-steel); }
.contact-mini { display: grid; gap: 6px; font-size: .9375rem; }
.contact-mini a { color: var(--ab-white); text-decoration: none; font-weight: 700; }

/* prose */
.prose { max-width: 74ch; }
.prose h2 { font-size: var(--step-3); margin-top: 1.9em; padding-top: .6em; border-top: 1px solid var(--ab-gray-200); scroll-margin-top: calc(var(--header-h) + 20px); }
.prose h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.prose h3 { font-size: 1.1875rem; margin-top: 1.6em; }
.prose p, .prose li { color: #26292C; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1.2em; }
.prose li { margin-bottom: .45em; }
.prose li::marker { color: var(--ab-steel-ink); }
.prose strong { color: var(--ab-black); }
.prose blockquote { margin: 1.6em 0; padding: 18px 22px; background: var(--ab-steel-50); border-left: 3px solid var(--ab-steel); color: var(--ab-gray-700); }
.prose blockquote p:last-child { margin: 0; }
.prose .note { background: var(--ab-black); color: var(--ab-gray-200); padding: 20px 22px; margin: 1.6em 0; }
.prose .note strong { color: var(--ab-steel); }
.table-wrap { overflow-x: auto; margin: 1.4em 0 1.8em; border: 1px solid var(--ab-gray-200); }
.table-wrap table { border-collapse: collapse; width: 100%; font-size: .9375rem; background: var(--ab-paper); }
.table-wrap th, .table-wrap td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--ab-gray-200); vertical-align: top; }
.table-wrap th { font: 600 .75rem/1.3 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ab-gray-600); background: var(--ab-gray-50); }
.table-wrap tr:last-child td { border-bottom: 0; }
.prose code { font-family: var(--font-mono); font-size: .875em; background: var(--ab-gray-100); padding: .1em .35em; }

/* standards */
.standards { display: flex; flex-wrap: wrap; gap: 8px; }
.standards .tag { border-color: var(--ab-gray-200); color: var(--ab-gray-700); background: var(--ab-paper); }

/* FAQ */
.faq { border-top: 1px solid var(--ab-gray-200); max-width: 900px; }
.faq details { border-bottom: 1px solid var(--ab-gray-200); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 48px 22px 0; position: relative; font: 600 1.0625rem/1.4 var(--font-body); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 16px; font: 400 1.6rem/1 var(--font-display); color: var(--ab-steel-ink); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 22px; color: var(--ab-gray-600); max-width: 75ch; }

/* ---------------------------------------------------------------- articles */
.article-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 32px); }
.article-card { display: flex; flex-direction: column; text-decoration: none; color: var(--ab-black); background: var(--ab-paper); border: 1px solid var(--ab-gray-200); min-width: 0; transition: border-color .25s; }
.dark .article-card { background: var(--ab-gray-900); border-color: var(--ab-gray-800); color: var(--ab-white); }
.article-card:hover { border-color: var(--ab-steel); color: var(--ab-black); }
.dark .article-card:hover { color: var(--ab-white); }
.article-card .card-img { aspect-ratio: 16 / 9; }
.article-card .card-body { gap: 12px; }
.article-card h3 { font-size: 1.0625rem; line-height: 1.3; margin: 0; }
.article-card p { color: var(--ab-gray-600); font-size: .9375rem; margin: 0; }
.dark .article-card p { color: var(--ab-gray-400); }
.meta-line { font: 500 .75rem/1.3 var(--font-mono); letter-spacing: .04em; color: var(--ab-gray-500); display: flex; gap: 10px; flex-wrap: wrap; }
.dark .meta-line { color: var(--ab-gray-400); }
@media (max-width: 1000px) { .article-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .article-cards { grid-template-columns: 1fr; } }
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.filter-bar button { font: 500 .8125rem/1 var(--font-mono); padding: 10px 14px; border: 1px solid var(--ab-gray-200); background: var(--ab-paper); color: var(--ab-gray-700); cursor: pointer; }
.filter-bar button[aria-pressed="true"] { background: var(--ab-black); color: var(--ab-white); border-color: var(--ab-black); }
.article-hero-img { margin-top: -1px; }
.article-hero-img img { width: 100%; max-height: 520px; object-fit: cover; }

/* ---------------------------------------------------------------- stub / statement */
.statement { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 32px; align-items: start; max-width: 980px; }
.statement-mark img { width: 100%; max-width: 110px; opacity: .9; }
@media (max-width: 640px) { .statement { grid-template-columns: 1fr; } .statement-mark img { max-width: 70px; } }

/* ---------------------------------------------------------------- spec table / events */
.spec { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); border-top: 1px solid var(--ab-gray-800); }
.spec > div { padding: 14px 0; border-bottom: 1px solid var(--ab-gray-800); }
.spec dt { color: var(--ab-gray-400); font-size: .9375rem; }
.spec dd { margin: 0; font-family: var(--font-mono); font-size: .875rem; color: var(--ab-white); }
.spec-list { display: grid; margin: 0; }
.spec-list div { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--ab-gray-800); }
.spec-list div:first-child { border-top: 1px solid var(--ab-gray-800); }

/* ---------------------------------------------------------------- contact / form */
.contact-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-list { display: grid; gap: 0; margin: 28px 0 0; border-top: 1px solid var(--ab-gray-800); }
.contact-list > div { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--ab-gray-800); }
.contact-list dt { font: 500 .75rem/1.6 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ab-gray-400); }
.contact-list dd { margin: 0; }
.contact-list a { color: var(--ab-white); text-decoration: none; font-weight: 600; }
.contact-list a:hover { color: var(--ab-steel); }
.light .contact-list, .contact-list.on-light { border-color: var(--ab-gray-200); }
.contact-list.on-light > div { border-color: var(--ab-gray-200); }
.contact-list.on-light dt { color: var(--ab-gray-500); }
.contact-list.on-light a { color: var(--ab-black); }
.form { display: grid; gap: 16px; background: var(--ab-paper); color: var(--ab-black); padding: clamp(22px, 4vw, 36px); border: 1px solid var(--ab-gray-200); }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.field { display: grid; gap: 7px; }
.field label { font: 600 .8125rem/1.3 var(--font-body); color: var(--ab-gray-700); }
.field input, .field textarea { font: 400 1rem/1.4 var(--font-body); padding: 13px 14px; border: 1px solid var(--ab-gray-200); background: var(--ab-white); color: var(--ab-black); border-radius: 2px; width: 100%; }
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--ab-steel-ink); box-shadow: 0 0 0 3px rgba(127,168,201,.35); }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--ab-danger); }
.form-hint, .form-consent { font-size: .8125rem; color: var(--ab-gray-500); margin: 0; }
.form-actions { display: flex; flex-wrap: wrap; gap: 14px 20px; align-items: center; }
.form-status { font-size: .9375rem; margin: 0; padding: 12px 14px; display: none; }
.form-status.ok { display: block; background: #E7F2EC; color: var(--ab-success); border-left: 3px solid var(--ab-success); }
.form-status.err { display: block; background: #F8E9E7; color: #9B3328; border-left: 3px solid var(--ab-danger); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* ---------------------------------------------------------------- CTA band */
.cta-band { background: var(--ab-black); color: var(--ab-white); position: relative; overflow: hidden; isolation: isolate; }
.cta-band::after { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .45;
  background-image: linear-gradient(rgba(127,168,201,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(127,168,201,.08) 1px, transparent 1px); background-size: 72px 72px; }

/* ---------------------------------------------------------------- footer */
.site-footer { background: var(--ab-black); color: var(--ab-gray-400); border-top: 1px solid var(--ab-gray-800); font-size: .9375rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: 36px; padding-block: 64px 48px; }
.footer-brand img { height: 72px; width: auto; margin-bottom: 18px; }
.footer-brand p { max-width: 36ch; }
.site-footer h3 { font: 500 .75rem/1.4 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ab-steel); margin-bottom: 16px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer a { color: var(--ab-gray-300); text-decoration: none; }
.site-footer a:hover { color: var(--ab-white); }
.footer-bottom { border-top: 1px solid var(--ab-gray-800); padding-block: 22px; display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; font-size: .8125rem; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- photo band */
.photo-band { background: var(--ab-black); }
.photo-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.photo-grid figure { margin: 0; overflow: hidden; aspect-ratio: 3 / 2; background: var(--ab-gray-900); }
.photo-grid img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.photo-grid figure:hover img { transform: scale(1.05); }
@media (max-width: 1000px) { .photo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .photo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------------------------------------------------------------- credits */
.credits-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.credit { background: var(--ab-paper); border: 1px solid var(--ab-gray-200); font-size: .8125rem; color: var(--ab-gray-600); min-width: 0; }
.credit img { aspect-ratio: 16/9; object-fit: cover; width: 100%; }
.credit div { padding: 12px 14px; display: grid; gap: 4px; overflow-wrap: anywhere; }

/* ---------------------------------------------------------------- reveal (from a visible resting state) */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .js .reveal.in { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-slide { transition: none; }
  .hero-slide.active { animation: none; }
  .alert-dot::after { animation: none !important; }
}
@media print { .site-header, .site-footer, .cta-band, .form { display: none !important; } body { background: #fff; } }