:root {
  color-scheme: dark;
  --ink: #eef6ff;
  --muted: #afc0d3;
  --quiet: #7f93a8;
  --bg: #07111f;
  --bg-deep: #030a13;
  --panel: #0c1a2a;
  --panel-2: #102338;
  --line: #284058;
  --line-soft: rgba(118, 161, 198, .2);
  --cyan: #75d6ff;
  --blue-dark: #244fc5;
  --green: #70ddb2;
  --amber: #ffd27a;
  --red: #ff9b9b;
  --max: 1200px;
  --radius: 14px;
  --shadow: 0 24px 80px rgba(0, 0, 0, .24);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; min-width: 320px; overflow-x: hidden; color: var(--ink); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
button, input, select, textarea { font: inherit; }
a { color: inherit; }
img, svg { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }
::selection { color: var(--bg-deep); background: var(--cyan); }
.skip-link { position: fixed; z-index: 999; top: 12px; left: 12px; padding: .75rem 1rem; border-radius: 8px; color: var(--bg); background: var(--cyan); transform: translateY(-160%); transition: transform .18s ease; }
.skip-link:focus { transform: translateY(0); }
.shell { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }
.section { padding: clamp(4rem, 8vw, 7.5rem) 0; }
.section-tight { padding: clamp(3rem, 6vw, 5rem) 0; }
.section-dark { background: var(--bg-deep); }
.section-panel { background: linear-gradient(180deg, rgba(16, 35, 56, .52), rgba(7, 17, 31, .2)); }
.section-head { display: grid; gap: .75rem; max-width: 760px; margin-bottom: 2.25rem; }
.section-head.split { max-width: none; grid-template-columns: minmax(0, 1fr) minmax(280px, .7fr); align-items: end; gap: 2rem; }
.eyebrow { margin: 0; color: var(--cyan); font: 700 .76rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; line-height: 1.16; letter-spacing: -.025em; text-wrap: balance; }
h1 { font-size: clamp(2.45rem, 6vw, 5rem); max-width: 17ch; }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); }
h3 { font-size: clamp(1.13rem, 2vw, 1.38rem); }
p { margin: 0; }
.lede { color: var(--muted); font-size: clamp(1.02rem, 1.8vw, 1.24rem); max-width: 66ch; }
.muted { color: var(--muted); }
.quiet { color: var(--quiet); }
.text-link { display: inline-flex; align-items: center; gap: .5rem; color: var(--cyan); font-weight: 700; text-decoration: none; }
.text-link::after { content: "→"; transition: transform .18s ease; }
.text-link:hover::after { transform: translateX(4px); }

.site-header { position: sticky; z-index: 100; top: 0; border-bottom: 1px solid var(--line-soft); background: rgba(7, 17, 31, .92); backdrop-filter: blur(18px); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 1.25rem; }
.brand { min-width: 0; display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; }
.brand-mark { width: 36px; flex: 0 0 36px; fill: none; stroke: var(--cyan); stroke-width: 1.6; }
.brand strong, .brand small { display: block; white-space: nowrap; }
.brand strong { font-size: .94rem; letter-spacing: .08em; text-transform: uppercase; }
.brand small { margin-top: .08rem; color: var(--cyan); font-size: .62rem; letter-spacing: .08em; text-transform: uppercase; }
.desktop-nav { display: flex; align-items: center; gap: 1.35rem; }
.desktop-nav a { position: relative; padding: .5rem 0; color: var(--muted); font-size: .78rem; font-weight: 700; text-decoration: none; }
.desktop-nav a:hover, .desktop-nav a[aria-current="page"] { color: var(--ink); }
.desktop-nav a[aria-current="page"]::after { content: ""; position: absolute; right: 0; bottom: 0; left: 0; height: 2px; background: var(--cyan); }
.header-actions { display: flex; align-items: center; gap: .75rem; }
.menu-button { width: 46px; height: 46px; display: none; place-items: center; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); background: var(--panel); cursor: pointer; }
.menu-button svg { width: 24px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-width: 2; }
.mobile-nav { position: fixed; z-index: 90; inset: 76px 0 auto; max-height: calc(100dvh - 76px); overflow-y: auto; border-bottom: 1px solid var(--line); background: var(--bg); box-shadow: var(--shadow); }
.mobile-nav-inner { display: grid; gap: .35rem; padding-block: 1rem 1.5rem; }
.mobile-nav a:not(.button) { padding: .85rem 1rem; border-radius: 9px; color: var(--muted); font-weight: 700; text-decoration: none; }
.mobile-nav a:hover, .mobile-nav a[aria-current="page"] { color: var(--ink); background: var(--panel); }

.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: .55rem; padding: .76rem 1.15rem; border: 1px solid #4d7cff; border-radius: 10px; color: white; background: var(--blue-dark); font-weight: 800; line-height: 1.2; text-align: center; text-decoration: none; cursor: pointer; transition: background .18s ease, border-color .18s ease, transform .18s ease; }
.button:hover { border-color: #6e91ff; background: #315ed7; transform: translateY(-1px); }
.button-secondary { border-color: var(--line); color: var(--ink); background: var(--panel); }
.button-secondary:hover { border-color: var(--cyan); background: var(--panel-2); }
.button-small { min-height: 42px; padding: .62rem .92rem; font-size: .78rem; }
.button[disabled] { opacity: .68; cursor: wait; transform: none; }
.button-row { display: flex; flex-wrap: wrap; gap: .8rem; align-items: center; }

.hero { position: relative; overflow: hidden; padding: clamp(3.5rem, 8vw, 7rem) 0; }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(117, 214, 255, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(117, 214, 255, .035) 1px, transparent 1px); background-size: 34px 34px; mask-image: linear-gradient(to bottom, #000, transparent 92%); }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, .83fr) minmax(520px, 1.17fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.hero-copy { display: grid; gap: 1.4rem; }
.hero-copy h1 { font-size: clamp(2.55rem, 5vw, 4.6rem); max-width: 14ch; }
.trust-line { display: flex; flex-wrap: wrap; gap: .4rem .75rem; color: var(--muted); font-size: .86rem; }
.trust-line span + span::before { content: "·"; margin-right: .75rem; color: var(--cyan); }

.investigation-graph { padding: 1.25rem; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(145deg, rgba(16, 35, 56, .95), rgba(3, 10, 19, .95)); box-shadow: var(--shadow); }
.graph-top, .graph-footer { display: flex; align-items: center; justify-content: space-between; gap: 1rem; color: var(--quiet); font: 700 .68rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .09em; text-transform: uppercase; }
.graph-top strong { color: var(--cyan); }
.graph-stage { position: relative; min-height: 420px; margin: 1rem 0; display: grid; grid-template-columns: 1fr .82fr 1fr; gap: 1rem; align-items: center; }
.graph-lines { position: absolute; z-index: 0; inset: 0; width: 100%; height: 100%; overflow: visible; }
.graph-lines path { fill: none; stroke: #6b95b8; stroke-width: 1.45; stroke-linecap: round; stroke-dasharray: 5 6; opacity: .58; vector-effect: non-scaling-stroke; transition: stroke .2s ease, opacity .2s ease, stroke-width .2s ease, filter .2s ease; animation: graph-dash 12s linear infinite; }
.graph-lines path.is-active { stroke: var(--cyan); stroke-width: 2.6; opacity: 1; filter: drop-shadow(0 0 2px rgba(117, 214, 255, .5)); }
@keyframes graph-dash { to { stroke-dashoffset: -80; } }
.graph-column, .graph-core { position: relative; z-index: 1; display: grid; gap: .55rem; }
.graph-column-label { margin-bottom: .15rem; color: var(--quiet); font: 700 .63rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; text-align: center; }
.graph-node { min-height: 48px; width: 100%; padding: .5rem .65rem; border: 1px solid var(--line); border-radius: 9px; color: var(--muted); background: rgba(7, 17, 31, .9); cursor: pointer; text-align: left; transition: border .18s ease, background .18s ease, color .18s ease; }
.graph-node small, .graph-node strong { display: block; }
.graph-node strong { color: var(--ink); font: 700 .69rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .06em; }
.graph-node small { margin-top: .15rem; overflow: hidden; color: var(--quiet); font: .68rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; text-overflow: ellipsis; }
.graph-node:hover, .graph-node[aria-pressed="true"] { border-color: var(--cyan); color: var(--ink); background: #102b40; }
.graph-core { place-items: center; }
.core-node { width: 112px; aspect-ratio: 1; display: grid; place-content: center; border: 1px solid var(--cyan); border-radius: 50%; background: radial-gradient(circle, rgba(77, 124, 255, .35), rgba(7, 17, 31, .96) 68%); box-shadow: 0 0 40px rgba(117, 214, 255, .16); text-align: center; }
.core-node strong { font-size: 1rem; letter-spacing: .12em; }
.core-node small { color: var(--cyan); font: .58rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.graph-context { min-height: 72px; padding: .75rem; border: 1px solid var(--line-soft); border-radius: 9px; color: var(--muted); background: rgba(7, 17, 31, .7); font-size: .78rem; }
.graph-context strong { color: var(--cyan); }
.graph-footer { justify-content: center; color: var(--cyan); }
.graph-mobile { display: none; }

.grid-2, .grid-3, .grid-4, .problem-grid, .resource-grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.problem-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { display: flex; flex-direction: column; gap: .8rem; padding: clamp(1.25rem, 3vw, 1.75rem); border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--panel); }
.card:hover { border-color: #3a5c78; }
.card p { color: var(--muted); }
.card .text-link { margin-top: auto; padding-top: .25rem; }
.card-index { color: var(--cyan); font: 700 .7rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.card-icon { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 10px; color: var(--cyan); background: var(--bg); font: 800 .72rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.section-actions { margin-top: 2rem; }

.method-rail { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.method-step { position: relative; min-height: 220px; padding: 1.35rem; background: var(--panel); }
.method-step + .method-step { border-left: 1px solid var(--line); }
.method-step span { color: var(--cyan); font: 700 .75rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.method-step small { display: block; margin: .45rem 0 1rem; color: var(--quiet); font: 700 .66rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; text-transform: uppercase; }
.method-step h2, .method-step h3 { font-size: clamp(1.25rem, 1.6vw, 1.55rem); line-height: 1.2; overflow-wrap: break-word; }
.method-step p { color: var(--muted); font-size: .9rem; }

.confidence-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .65rem; }
.confidence { padding: 1.35rem; border-top: 3px solid var(--quiet); border-radius: 0 0 var(--radius) var(--radius); background: var(--panel); }
.confidence strong { display: block; margin-bottom: .7rem; font: 800 .78rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.confidence p { color: var(--muted); font-size: .88rem; }
.confidence.confirmed { border-color: var(--green); }
.confidence.confirmed strong { color: var(--green); }
.confidence.probable { border-color: var(--cyan); }
.confidence.probable strong { color: var(--cyan); }
.confidence.possible { border-color: var(--amber); }
.confidence.possible strong { color: var(--amber); }

.report-shell { display: grid; grid-template-columns: 180px 1fr; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: #eaf1f7; color: #0b1a29; box-shadow: var(--shadow); }
.report-sidebar { padding: 1.4rem; color: #dcecff; background: #0b1a29; }
.report-sidebar strong { display: block; margin-bottom: 1.5rem; letter-spacing: .08em; }
.report-sidebar ul { margin: 0; padding: 0; display: grid; gap: .7rem; list-style: none; font-size: .72rem; }
.report-sidebar li { color: #9eb4c8; }
.report-sidebar li.active { color: var(--cyan); }
.report-page { padding: clamp(1.5rem, 4vw, 3rem); }
.report-meta { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid #b7c8d6; color: #3e556a; font: 700 .65rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; }
.report-page h3 { margin: 1.5rem 0 .65rem; }
.report-page p { color: #31495f; }
.report-bars { margin-top: 1.5rem; display: grid; gap: .75rem; }
.report-bar { height: 10px; border-radius: 999px; background: #c8d7e3; }
.report-bar:nth-child(2) { width: 78%; }
.report-bar:nth-child(3) { width: 62%; }
.report-tags { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.report-tags span { padding: .35rem .55rem; border-radius: 5px; color: #14415d; background: #cbeafa; font-size: .68rem; font-weight: 800; }

.boundary-list { margin: 0; padding: 0; display: grid; gap: .75rem; list-style: none; }
.boundary-list li { display: grid; grid-template-columns: 26px 1fr; gap: .7rem; color: var(--muted); }
.boundary-list li::before { content: "—"; color: var(--red); font-weight: 900; }
.quote-card blockquote { margin: 0; color: var(--ink); font-size: 1.02rem; }
.quote-card footer { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--line-soft); color: var(--cyan); font: 700 .7rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .06em; text-transform: uppercase; }

.faq { display: grid; gap: .65rem; }
.faq details { border: 1px solid var(--line-soft); border-radius: 10px; background: var(--panel); }
.faq summary { min-height: 52px; padding: 1rem 3.25rem 1rem 1.15rem; cursor: pointer; font-weight: 750; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; top: .72rem; right: 1.1rem; color: var(--cyan); font-size: 1.35rem; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 1.15rem 1.15rem; color: var(--muted); }

.page-hero { position: relative; padding: clamp(3.5rem, 8vw, 6.5rem) 0; border-bottom: 1px solid var(--line-soft); background: radial-gradient(circle at 75% 10%, rgba(24, 185, 242, .1), transparent 35%), var(--bg-deep); }
.page-hero .shell { display: grid; gap: 1rem; }
.page-hero h1 { max-width: 19ch; font-size: clamp(2.35rem, 5vw, 4rem); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .45rem; color: var(--quiet); font-size: .78rem; }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs span + span::before, .breadcrumbs a + span::before { content: "/"; margin-right: .45rem; color: var(--line); }
.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.prose { max-width: 760px; }
.prose > * + * { margin-top: 1.25rem; }
.prose h2 { margin-top: 2.75rem; font-size: clamp(1.55rem, 3vw, 2.1rem); }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { color: var(--muted); }
.prose ul, .prose ol { padding-left: 1.2rem; }
.prose a { color: var(--cyan); }
.aside-card { position: sticky; top: 100px; display: grid; gap: 1rem; padding: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.aside-card p { color: var(--muted); font-size: .9rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag { padding: .35rem .6rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .72rem; }

.contact-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.contact-notes { display: grid; gap: 1rem; }
.contact-notes .card { gap: .65rem; }
.contact-form { padding: clamp(1.25rem, 4vw, 2.25rem); border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.field { display: grid; gap: .45rem; }
.field-full { grid-column: 1 / -1; }
.field label, .fieldset legend { color: var(--ink); font-size: .82rem; font-weight: 750; }
.field input, .field select, .field textarea { width: 100%; border: 1px solid #3c5873; border-radius: 9px; color: var(--ink); background: var(--bg); }
.field input, .field select { min-height: 48px; padding: .7rem .8rem; }
.field textarea { min-height: 160px; padding: .8rem; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: #758ba0; opacity: 1; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--cyan); outline: 3px solid rgba(117, 214, 255, .22); outline-offset: 1px; }
.field-help, .field-error { font-size: .75rem; }
.field-help { color: var(--quiet); }
.field-error { min-height: 1.2em; color: var(--red); }
.fieldset { grid-column: 1 / -1; margin: 0; padding: 0; border: 0; }
.check-grid { margin-top: .65rem; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .55rem; }
.check { min-height: 44px; display: flex; align-items: center; gap: .55rem; padding: .55rem .7rem; border: 1px solid var(--line-soft); border-radius: 8px; color: var(--muted); background: var(--bg); font-size: .85rem; }
.check input { width: 18px; height: 18px; accent-color: var(--blue-dark); }
.consent { grid-column: 1 / -1; display: flex; gap: .7rem; align-items: flex-start; color: var(--muted); font-size: .82rem; }
.consent input { width: 19px; height: 19px; flex: 0 0 auto; margin-top: .18rem; accent-color: var(--blue-dark); }
.consent a { color: var(--cyan); }
.form-actions { grid-column: 1 / -1; display: grid; gap: .8rem; }
.form-status { min-height: 0; padding: 0; border-radius: 9px; }
.form-status:not(:empty) { padding: .9rem 1rem; border: 1px solid var(--line); background: var(--bg); }
.form-status[data-state="success"] { border-color: var(--green); }
.form-status[data-state="error"] { border-color: var(--red); }
.form-status strong { display: block; margin-bottom: .2rem; }
.hp-field { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden !important; clip: rect(0 0 0 0) !important; white-space: nowrap !important; }

.cta-band { padding: clamp(2rem, 5vw, 3.5rem); display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: center; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(120deg, rgba(77, 124, 255, .2), rgba(24, 185, 242, .08)); }
.cta-band p { margin-top: .65rem; color: var(--muted); }
.site-footer { padding-top: 4rem; border-top: 1px solid var(--line-soft); background: var(--bg-deep); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 2.5rem; }
.footer-brand p { margin-top: 1rem; max-width: 360px; color: var(--muted); font-size: .86rem; }
.site-footer h2 { margin-bottom: 1rem; color: var(--quiet); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; }
.site-footer ul { margin: 0; padding: 0; display: grid; gap: .55rem; list-style: none; }
.site-footer li, .site-footer a { color: var(--muted); font-size: .84rem; }
.site-footer a:hover { color: var(--cyan); }
.footer-bottom { margin-top: 3rem; padding: 1.25rem 0 2rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: .75rem 1.5rem; border-top: 1px solid var(--line-soft); color: var(--quiet); font-size: .76rem; }

@media (max-width: 1080px) {
  .desktop-nav, .header-cta { display: none; }
  .menu-button { display: grid; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; }
  .investigation-graph { max-width: 760px; }
  .problem-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method-step:nth-child(odd) { border-left: 0; }
  .method-step:nth-child(n+3) { border-top: 1px solid var(--line); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .section-head.split, .contact-layout, .content-layout { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .confidence-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .aside-card { position: static; }
  .graph-desktop { display: none; }
  .graph-mobile { display: grid; gap: .8rem; }
  .graph-mobile > div { padding: 1rem; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
  .graph-mobile .graph-step-title { color: var(--cyan); font: 800 .75rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
  .graph-mobile details { margin-top: .55rem; border-top: 1px solid var(--line-soft); }
  .graph-mobile summary { padding: .7rem 0 0; cursor: pointer; font-weight: 750; }
  .graph-mobile p { padding-top: .45rem; color: var(--muted); font-size: .85rem; }
  .flow-arrow { color: var(--cyan); text-align: center; font-size: 1.5rem; }
  .report-shell { grid-template-columns: 1fr; }
  .report-sidebar { display: none; }
  .cta-band { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .field-full, .fieldset, .consent, .form-actions { grid-column: auto; }
}
@media (max-width: 540px) {
  .shell { width: min(calc(100% - 1.25rem), var(--max)); }
  .brand small { display: none; }
  .brand strong { font-size: .83rem; }
  .hero-copy h1 { font-size: clamp(2.2rem, 12vw, 3.2rem); }
  .button-row { align-items: stretch; }
  .button-row .button { width: 100%; }
  .problem-grid, .resource-grid, .grid-2, .grid-3, .grid-4, .confidence-grid, .method-rail { grid-template-columns: 1fr; }
  .method-step + .method-step { border-left: 0; border-top: 1px solid var(--line); }
  .check-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
}