/* ==========================================================================
   Weldeon — Editorial Luxury stylesheet
   Base · editorial grid · components · motion
   Rule: sections are separated by whitespace + paper tone, NEVER borders.
   ========================================================================== */

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "liga","kern";
  font-optical-sizing: auto;
  hanging-punctuation: first last;
  overflow-x: hidden;
}
::selection { background: var(--accent-soft); color: var(--ink); }
img, svg, video { max-width: 100%; height: auto; display: block; }
ul, ol { padding: 0; margin: 0; list-style: none; }
figure { margin: 0; }
blockquote { margin: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--ink);
  font-weight: 600;
  margin: 0;
  text-wrap: balance;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-h1); line-height: 1.08; font-weight: 700; letter-spacing: -0.015em; }
h2 { font-size: var(--fs-h2); line-height: 1.12; font-weight: 600; letter-spacing: -0.012em; }
h3 { font-size: var(--fs-h3); line-height: 1.2; letter-spacing: -0.012em; }
h4 { font-size: var(--fs-h4); line-height: 1.3; letter-spacing: -0.006em; }
p  { margin: 0; max-width: 68ch; text-wrap: pretty; }

a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-hover); }

:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--ink); color: var(--text-on-ink);
  padding: var(--space-3) var(--space-6); font-size: var(--fs-small);
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* ---------- Containers & sections ---------- */
.container {
  width: 100%; max-width: var(--container-xl);
  margin-inline: auto; padding-inline: var(--margin);
}
.container--text { max-width: var(--container-text); }
.container--md   { max-width: var(--container-md); }
.container--lg   { max-width: var(--container-lg); }
.container--wide { max-width: var(--container-2xl); }

.section { padding-block: var(--section-y); border: 0; position: relative; }
/* No rule between sections — and two stacked sections share one gap. */
.section + .section:not(.section--opener) { border-top: 0; padding-top: 0; }
.section--opener { padding-block: var(--section-y-lg) var(--section-y); }
/* The bone, warm and ink variants keep their names but every one of them now
   resolves to the single paper canvas, in ink on paper. */
.section--bone,
.section--warm,
.section--ink { background: var(--paper); color: var(--text-secondary); }
.section--ink h1, .section--ink h2, .section--ink h3, .section--ink h4 { color: var(--ink); }
.section--ink .kicker { color: var(--text-muted); }
.section--ink .kicker::after { background: var(--rule-default); }
.section--ink .deck { color: var(--text-secondary); }
.section--ink .rule, .section--ink .index-item, .section--ink .figure-item { border-color: var(--rule-subtle); }
.section--ink .link-underline { color: var(--text-primary); border-bottom-color: var(--rule-default); }
.section--ink .link-underline:hover { border-bottom-color: var(--text-primary); }
.section--ink .figure-value { color: var(--ink); }
.section--ink .note { color: var(--text-on-ink-muted); }

.bleed { width: 100vw; margin-inline: calc(50% - 50vw); }
.stack > * + * { margin-top: var(--stack); }

/* ---------- Editorial grid ---------- */
.grid { display: grid; gap: var(--grid-gap); grid-template-columns: repeat(var(--grid-cols), 1fr); }
.col-text  { grid-column: 2 / 8; }
.col-wide  { grid-column: 2 / 12; }
.col-left  { grid-column: 1 / 7; }
.col-right { grid-column: 7 / 13; }
.col-aside { grid-column: 9 / 13; }
.col-full  { grid-column: 1 / -1; }
.col-display { grid-column: 1 / 12; }
.col-deck    { grid-column: 1 / 7; }
.col-actions { grid-column: 8 / 12; }
@media (max-width: 900px) {
  .col-text, .col-wide, .col-left, .col-right, .col-aside,
  .col-display, .col-deck, .col-actions { grid-column: 1 / -1; }
}

/* ---------- Editorial primitives ---------- */
.kicker {
  font-family: var(--font-sans); font-size: var(--fs-kicker); font-weight: 600;
  letter-spacing: .16em; text-transform: uppercase; color: var(--text-muted);
  display: block; margin: 0;
}
.kicker::after {
  content: ""; display: block; width: 40px; height: 1px;
  background: var(--rule-default); margin-top: var(--space-3);
}
.kicker--plain::after { display: none; }
.section-number {
  font-family: var(--font-serif); font-size: var(--fs-small);
  color: var(--text-muted); font-variant-numeric: oldstyle-nums;
}
.deck {
  font-size: var(--fs-deck); line-height: 1.4; color: var(--text-secondary);
  max-width: 56ch; font-family: var(--font-body);
}
.lead { font-size: var(--fs-lead); line-height: 1.55; color: var(--text-secondary); }
.prose { max-width: var(--container-text); }
.prose p + p { margin-top: var(--space-6); }
.prose p { font-size: var(--fs-body-lg); line-height: 1.75; }
.has-dropcap::first-letter {
  font-family: var(--font-serif); float: left; font-size: 3.4em; line-height: .8;
  padding-right: .08em; color: var(--ink); font-weight: 500;
}
.note { font-size: var(--fs-small); color: var(--text-muted); font-style: italic; max-width: 62ch; }
.rule { border: 0; border-top: 1px solid var(--rule-default); margin: 0; }
figcaption { font-size: var(--fs-small); color: var(--text-muted); line-height: 1.45; margin-top: var(--space-3); }
figcaption .credit { font-style: italic; }
.mono { font-family: var(--font-mono); font-size: var(--fs-small); }

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-sans); font-weight: 600; font-size: .75rem;
  letter-spacing: .14em; text-transform: uppercase;
  padding: var(--space-4) var(--space-8); border-radius: 0;
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  min-height: 48px; line-height: 1; position: relative; isolation: isolate;
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.btn-primary { background: var(--ink); color: var(--text-on-ink); }
.btn-primary:hover { background: var(--accent); color: var(--text-on-accent); }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--rule-default); }
.btn-outline:hover { border-color: var(--ink); background: var(--ink); color: var(--text-on-ink); }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-5); align-items: center; }
.col-actions .btn-row { flex-direction: column; align-items: stretch; gap: var(--space-4); }
.col-actions .btn { justify-content: center; }
@media (max-width: 900px) {
  .col-actions .btn-row { flex-direction: row; flex-wrap: wrap; align-items: center; }
  .col-actions .btn { justify-content: flex-start; }
}

.link-underline {
  color: var(--ink); text-decoration: none; padding-bottom: 3px;
  border-bottom: 1px solid var(--rule-default);
  transition: border-color var(--dur-fast) ease, color var(--dur-fast) ease;
  font-weight: 500;
}
.link-underline:hover { border-bottom-color: var(--ink); color: var(--ink); }
.link-arrow {
  font-family: var(--font-sans); font-size: .75rem; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink);
  text-decoration: none; display: inline-flex; align-items: center; gap: var(--space-3);
  min-height: 44px;
}
.link-arrow::after {
  content: "\2192"; transition: transform var(--dur-base) var(--ease-out);
  color: var(--accent);
}
.link-arrow:hover { color: var(--accent); }
.link-arrow:hover::after { transform: translateX(6px); }

/* ---------- Navbar ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--paper);
}
.site-header.is-stuck {
  background: var(--paper);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-8); min-height: 76px;
}
.wordmark {
  display: inline-flex; align-items: center;
  font-family: var(--font-serif); font-size: 1.375rem; letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none; font-weight: 500; white-space: nowrap;
}
.wordmark .dot { color: var(--accent); }
.wordmark__logo { display: block; height: 30px; width: auto; }
.nav-links { display: flex; align-items: center; gap: var(--space-8); }
.nav-link {
  font-size: var(--fs-small); font-weight: 500; letter-spacing: .02em;
  color: var(--text-primary); text-decoration: none; background: none; border: 0;
  font-family: var(--font-sans); cursor: pointer; padding: var(--space-2) 0;
  display: inline-flex; align-items: center; gap: var(--space-2);
}
.nav-link:hover { color: var(--accent); }
.nav-link[aria-current="page"] { color: var(--accent); }
.nav-item { position: relative; }
.nav-caret { width: 8px; height: 8px; transition: transform var(--dur-fast) ease; }
.nav-link[aria-expanded="true"] .nav-caret { transform: rotate(180deg); }

.dropdown {
  position: absolute; top: calc(100% + 14px); left: 50%; transform: translateX(-50%);
  min-width: 620px; background: var(--paper);  padding: var(--space-10); display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--space-10); border-radius: 0; border: 1px solid var(--rule-subtle);
}
.dropdown[hidden] { display: none; }
.dropdown-col { display: flex; flex-direction: column; gap: var(--space-3); }
.dropdown-col + .dropdown-col { border-left: 1px solid var(--rule-subtle); padding-left: var(--space-10); }
.dropdown a { color: var(--text-primary); text-decoration: none; display: block; padding-block: var(--space-3); }
.dropdown a:hover .dropdown-title { color: var(--accent); }
.dropdown-title {
  display: block; font-family: var(--font-serif); font-size: 1.1875rem; color: var(--ink);
  line-height: 1.2; transition: color var(--dur-fast) ease;
}
.dropdown-desc { display: block; font-size: var(--fs-small); color: var(--text-muted); line-height: 1.45; margin-top: var(--space-2); }

.nav-cta { display: flex; align-items: center; gap: var(--space-5); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: var(--space-3); }
.nav-toggle span { display: block; width: 24px; height: 1px; background: var(--ink); }
.nav-toggle span + span { margin-top: 6px; }

.mobile-menu {
  position: fixed; inset: 0; z-index: 150; background: var(--paper);
  padding: var(--space-8) 0; overflow-y: auto;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu-head { display: flex; align-items: center; justify-content: space-between; min-height: 60px; }
.mobile-links { margin-top: var(--space-12); display: flex; flex-direction: column; }
.mobile-links a {
  font-family: var(--font-serif); font-size: 1.75rem; color: var(--ink);
  text-decoration: none; padding: var(--space-4) 0;
  border-bottom: 1px solid var(--rule-subtle);
}
.mobile-links a:hover { color: var(--accent); }
.mobile-menu .btn { margin-top: var(--space-10); }

@media (max-width: 1080px) {
  .nav-links, .nav-cta .btn { display: none; }
  .nav-toggle { display: block; }
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs { padding-top: var(--space-8); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); font-size: var(--fs-small); color: var(--text-muted); }
.breadcrumbs a { color: var(--text-muted); text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs li + li::before { content: "—"; margin-right: var(--space-2); color: var(--text-faint); }

/* ---------- Hero / opener ---------- */
.hero { padding-block: clamp(64px, 9vw, 128px) var(--section-y); }
.hero h1 {
  font-size: var(--fs-display); line-height: 1.0; letter-spacing: -0.035em;
  font-weight: 350; max-width: 18ch;
}
.hero .deck { margin-top: 0; }
.hero .btn-row { margin-top: var(--space-8); }
.opener-foot {
  margin-top: clamp(48px, 6vw, 88px);
  padding-top: var(--space-8);
  border-top: 1px solid var(--rule-default);   /* inside the composition, not between sections */
}
.opener-foot .col-deck { align-self: start; }
.opener-foot .col-actions { align-self: start; }
.opener-label {
  font-size: var(--fs-kicker); letter-spacing: .16em; text-transform: uppercase;
  color: var(--text-muted); font-weight: 600; display: block; margin-bottom: var(--space-5);
}
@media (max-width: 900px) {
  .opener-foot .col-actions { margin-top: var(--space-10); }
  .hero h1 { max-width: none; }
}
.hero-meta {
  margin-top: var(--space-16); display: grid; gap: var(--space-8) var(--col-gap);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--rule-default); padding-top: var(--space-6);
}
@media (max-width: 820px) { .hero-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.hero-meta div { min-width: 0; }
.hero-meta dt { font-size: var(--fs-kicker); letter-spacing: .16em; text-transform: uppercase; color: var(--text-muted); }
.hero-meta dd { margin: var(--space-3) 0 0; font-family: var(--font-serif); font-size: 1.25rem; color: var(--ink); line-height: 1.25; }

/* ---------- Plates (figures / art direction) ---------- */
.plate { overflow: hidden; }
.plate img, .plate svg { width: 100%; display: block; }
.plate figcaption { max-width: 62ch; }
.section--ink .plate figcaption { color: var(--text-on-ink-muted); }
.plate-frame {
  background: var(--surface); padding: var(--space-6);  transition: transform var(--dur-base) var(--ease-out);
}
.plate-frame:hover { }

/* ---------- Alternating plate rows ---------- */
.plate-row { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--col-gap); align-items: center; }
.plate-row + .plate-row { margin-top: clamp(56px, 8vw, 128px); }
.plate-row .plate-media { grid-column: 1 / 7; }
.plate-row .plate-body  { grid-column: 8 / 13; }
.plate-row--flip .plate-media { grid-column: 7 / 13; grid-row: 1; }
.plate-row--flip .plate-body  { grid-column: 1 / 6; grid-row: 1; }
@media (max-width: 900px) {
  .plate-row .plate-media, .plate-row .plate-body,
  .plate-row--flip .plate-media, .plate-row--flip .plate-body { grid-column: 1 / -1; grid-row: auto; }
}

/* ---------- Index list ---------- */
.index-list { margin-top: var(--space-12); }
.index-item {
  display: grid; grid-template-columns: 64px minmax(0, 1fr) minmax(0, 1.2fr);
  gap: var(--col-gap); padding-block: var(--space-8);
  border-top: 1px solid var(--rule-default);
}
.index-item:last-child { border-bottom: 1px solid var(--rule-default); }
.index-item .num { font-family: var(--font-serif); color: var(--text-muted); font-size: 1rem; padding-top: .35em; }
.index-item h3 { font-size: var(--fs-h4); }
.index-item p { font-size: var(--fs-body); color: var(--text-secondary); }
@media (max-width: 800px) {
  .index-item { grid-template-columns: 40px 1fr; gap: var(--space-4); }
  .index-item p { grid-column: 2; }
}

/* ---------- Editorial figures (stats) ---------- */
.figure-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--col-gap); margin-top: var(--space-12); }
.figure-item { border-top: 1px solid var(--rule-default); padding-top: var(--space-6); }
.figure-value {
  font-family: var(--font-serif); font-size: var(--fs-figure); line-height: 1;
  color: var(--ink); font-variant-numeric: oldstyle-nums; letter-spacing: -0.02em;
}
.figure-label { margin-top: var(--space-4); font-size: var(--fs-small); color: var(--text-muted); max-width: 28ch; }
@media (max-width: 900px) { .figure-row { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .figure-row { grid-template-columns: 1fr; } }

/* ---------- Pull quote ---------- */
.pull-quote {
  font-family: var(--font-serif); font-size: var(--fs-quote); font-style: italic;
  line-height: 1.2; color: var(--ink); max-width: 22ch; letter-spacing: -0.01em;
}
.quote-block { border-top: 1px solid var(--rule-default); padding-top: var(--space-8); }
.quote-attr { margin-top: var(--space-8); font-size: var(--fs-small); color: var(--text-muted); font-style: normal; }
.quote-attr cite { font-style: normal; display: block; color: var(--text-primary);
  letter-spacing: .12em; text-transform: uppercase; font-size: var(--fs-kicker); font-weight: 600; }

/* ---------- Column cards (typographic, not boxed) ---------- */
.col-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--col-gap); margin-top: var(--space-12); }
.col-card { border-top: 1px solid var(--rule-default); padding-top: var(--space-6); }
.col-card h3 { font-size: var(--fs-h4); margin-bottom: var(--space-4); }
.col-card p { font-size: var(--fs-body); }
@media (max-width: 900px) { .col-cards { grid-template-columns: 1fr; } }
.col-cards--2 { grid-template-columns: repeat(2, 1fr); }
.col-cards--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1000px) { .col-cards--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .col-cards--2, .col-cards--4 { grid-template-columns: 1fr; } }

/* ---------- Logos / marks ---------- */
.logo-row {
  display: flex; flex-wrap: wrap; gap: var(--space-10) var(--space-16);
  align-items: center; margin-top: var(--space-10);
}
.logo-mark {
  font-family: var(--font-serif); font-size: 1.125rem; letter-spacing: .04em;
  color: var(--logo-mark);
}
.section--ink .logo-mark { color: var(--text-on-ink); }

/* ---------- Steps (agent workflow) ---------- */
.steps { counter-reset: step; margin-top: var(--space-12); display: grid; gap: 0; }
.step {
  display: grid; grid-template-columns: 72px 1fr; gap: var(--col-gap);
  padding-block: var(--space-8); border-top: 1px solid var(--rule-default);
}
.step:last-child { border-bottom: 1px solid var(--rule-default); }
.step .step-num { font-family: var(--font-serif); font-size: 1.5rem; color: var(--accent); line-height: 1.2; }
.section--ink .step .step-num { color: var(--accent-on-ink); }
.step h3 { font-size: var(--fs-h4); }
.step p { margin-top: var(--space-3); font-size: var(--fs-body); }
@media (max-width: 700px) { .step { grid-template-columns: 48px 1fr; gap: var(--space-4); } }

/* ---------- Code / terminal ---------- */
.code-block {
  background: var(--paper-ink); color: var(--text-on-ink); padding: var(--space-6);
  border-radius: var(--radius-sm); overflow-x: auto; position: relative;
}
.code-block pre { margin: 0; font-family: var(--font-mono); font-size: .8125rem; line-height: 1.75; }
@media (max-width: 640px) { .code-block pre, .terminal pre { font-size: .75rem; } }
.code-block .tok-key { color: #c9855f; }
.code-block .tok-str { color: #a3b98c; }
.code-block .tok-com { color: #8a8271; font-style: italic; }
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-mono); font-size: var(--fs-small); color: var(--text-muted);
  margin-bottom: var(--space-3);
}
.copy-btn {
  background: none; border: 1px solid var(--rule-default); color: var(--text-muted);
  font-family: var(--font-sans); font-size: .75rem; letter-spacing: .1em; text-transform: uppercase;
  padding: var(--space-2) var(--space-3); cursor: pointer; border-radius: var(--radius-sm);
}
.copy-btn:hover { color: var(--ink); border-color: var(--ink); }
.terminal { background: var(--paper-ink); color: var(--text-on-ink); padding: var(--space-6); border-radius: var(--radius-sm); overflow-x: auto; }
.terminal pre { margin: 0; font-family: var(--font-mono); font-size: .8125rem; line-height: 1.8; }
.terminal .prompt { color: var(--accent-on-ink); }

/* ---------- Pricing ---------- */
.pricing-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--col-gap); margin-top: var(--space-16); align-items: stretch; }
@media (max-width: 900px) { .pricing-row { grid-template-columns: 1fr; } }
.tier { border-top: 1px solid var(--rule-default); padding-top: var(--space-6); display: flex; flex-direction: column; }
.tier--featured { border-top-color: var(--accent); border-top-width: 2px; padding-top: calc(var(--space-6) - 1px); }
.tier-name { font-size: var(--fs-kicker); letter-spacing: .16em; text-transform: uppercase; color: var(--text-muted); font-weight: 600; }
.tier--featured .tier-name { color: var(--accent); }
.tier-amount {
  font-family: var(--font-serif); font-size: clamp(2.5rem, 2rem + 2vw, 3.75rem);
  line-height: 1; color: var(--ink); margin-top: var(--space-6); letter-spacing: -0.03em;
  font-variant-numeric: lining-nums tabular-nums; font-weight: 350;
}
.tier-unit { display: block; font-family: var(--font-sans); font-size: var(--fs-small); color: var(--text-muted); margin-top: var(--space-3); letter-spacing: 0; }
.tier-desc { margin-top: var(--space-6); font-size: var(--fs-body); }
.tier-list { margin-top: var(--space-8); }
.tier-list li { padding-block: var(--space-4); border-top: 1px solid var(--rule-subtle); font-size: var(--fs-small); color: var(--text-secondary); }
.tier .btn { margin-top: auto; align-self: flex-start; }
.tier .btn-row, .tier > .btn { margin-top: auto; padding-top: var(--space-8); }
.toggle-row { display: flex; align-items: center; gap: var(--space-4); margin-top: var(--space-10); font-size: var(--fs-small); color: var(--text-muted); }
.switch {
  position: relative; width: 56px; height: 26px; border-radius: 0;
  background: transparent; border: 1px solid var(--rule-strong); cursor: pointer; padding: 0;
  transition: border-color var(--dur-fast) ease;
}
.switch::after {
  content: ""; position: absolute; top: 3px; left: 3px; width: 22px; height: 18px;
  background: var(--ink); transition: transform var(--dur-base) var(--ease-out), background var(--dur-fast) ease;
}
.switch[aria-checked="true"] { border-color: var(--accent); }
.switch[aria-checked="true"]::after { transform: translateX(26px); background: var(--accent); }

/* ---------- FAQ / accordion ---------- */
.faq-list { margin-top: var(--space-12); }
.faq-item { border-top: 1px solid var(--rule-default); }
.faq-item:last-child { border-bottom: 1px solid var(--rule-default); }
.faq-q {
  width: 100%; display: grid; grid-template-columns: 56px 1fr 32px; gap: var(--space-4);
  align-items: baseline; background: none; border: 0; cursor: pointer;
  text-align: left; padding: var(--space-8) 0; font-family: var(--font-serif);
  font-size: var(--fs-h4); color: var(--ink); line-height: 1.3;
}
.faq-q .num { font-size: var(--fs-small); color: var(--text-muted); font-variant-numeric: oldstyle-nums; }
.faq-q .sign { font-family: var(--font-sans); font-size: 1.25rem; color: var(--text-muted); justify-self: end; }
.faq-q[aria-expanded="true"] .sign { color: var(--accent); }
.faq-a { padding: 0 0 var(--space-8) calc(56px + var(--space-4)); }
.faq-a p { font-size: var(--fs-body); }
.faq-a[hidden] { display: none; }
@media (max-width: 700px) {
  .faq-q { grid-template-columns: 32px 1fr 24px; font-size: 1.125rem; }
  .faq-a { padding-left: calc(32px + var(--space-4)); }
}

/* ---------- Tabs ---------- */
.tabs { margin-top: var(--space-10); }
.tablist { display: flex; flex-wrap: wrap; gap: var(--space-8); border-bottom: 1px solid var(--rule-default); }
.tab {
  background: none; border: 0; border-bottom: 1px solid transparent; margin-bottom: -1px;
  padding: var(--space-3) 0; cursor: pointer; font-family: var(--font-sans);
  font-size: var(--fs-small); letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-muted); font-weight: 600;
}
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tabpanel { padding-top: var(--space-10); }
.tabpanel[hidden] { display: none; }

/* ---------- Definition / spec lists ---------- */
.spec-list { margin-top: var(--space-10); }
.spec-list > div {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: var(--col-gap);
  padding-block: var(--space-6); border-top: 1px solid var(--rule-default);
}
.spec-list > div:last-child { border-bottom: 1px solid var(--rule-default); }
.spec-list dt { font-family: var(--font-serif); font-size: 1.125rem; color: var(--ink); }
.spec-list dd { margin: 0; font-size: var(--fs-body); }
@media (max-width: 760px) { .spec-list > div { grid-template-columns: 1fr; gap: var(--space-3); } }

/* ---------- Journal / article cards ---------- */
.article-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--col-gap); margin-top: var(--space-12); }
@media (max-width: 900px) { .article-row { grid-template-columns: 1fr; } }
.article { border-top: 1px solid var(--rule-default); padding-top: var(--space-6); }
.article .meta { font-size: var(--fs-kicker); letter-spacing: .16em; text-transform: uppercase; color: var(--text-muted); }
.article h3 { margin-top: var(--space-4); font-size: var(--fs-h4); }
.article h3 a { color: var(--ink); text-decoration: none; }
.article h3 a:hover { color: var(--accent); }
.article p { margin-top: var(--space-4); font-size: var(--fs-body); }

/* ---------- Forms ---------- */
.form { margin-top: var(--space-12); max-width: 640px; }
.field + .field { margin-top: var(--space-8); }
.field label { display: block; font-size: var(--fs-kicker); letter-spacing: .16em; text-transform: uppercase; color: var(--text-muted); font-weight: 600; }
.field input, .field select, .field textarea {
  width: 100%; margin-top: var(--space-3); background: transparent;
  border: 0; border-bottom: 1px solid var(--rule-default); padding: var(--space-3) 0;
  font-family: var(--font-body); font-size: var(--fs-body); color: var(--ink); min-height: 44px;
}
.field input:focus, .field select:focus, .field textarea:focus { border-bottom-color: var(--ink); }
.field textarea { min-height: 132px; resize: vertical; }

/* ---------- Footer ---------- */
.site-footer { background: var(--paper-bone); padding-block: var(--section-y) var(--space-16); }
.footer-top { border-top: 1px solid var(--rule-default); padding-top: var(--space-12);
  display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr)); gap: var(--col-gap); }
@media (max-width: 1000px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-top { grid-template-columns: 1fr; } }
.footer-brand p { margin-top: var(--space-5); font-size: var(--fs-small); max-width: 34ch; color: var(--text-muted); }
.footer-col h4 { font-family: var(--font-sans); font-size: var(--fs-kicker); letter-spacing: .16em;
  text-transform: uppercase; color: var(--text-muted); font-weight: 600; }
.footer-col ul { margin-top: var(--space-4); display: flex; flex-direction: column; gap: 0; }
.footer-col a { font-size: var(--fs-small); color: var(--text-primary); text-decoration: none;
  display: inline-block; padding-block: var(--space-2); }
.footer-col a:hover { color: var(--accent); }
.footer-fine {
  margin-top: var(--space-16); padding-top: var(--space-6); border-top: 1px solid var(--rule-subtle);
  display: flex; flex-wrap: wrap; gap: var(--space-6); justify-content: space-between;
  font-size: var(--fs-small); color: var(--text-muted); font-variant-numeric: oldstyle-nums;
  align-items: center;
}
.footer-fine a { color: var(--text-muted); text-decoration: none; display: inline-flex;
  align-items: center; min-height: 44px; }
.footer-fine a:hover { color: var(--accent); }

/* ---------- Motion ----------
   Progressive enhancement: content is visible by default. Only when JavaScript
   has run (html.js) is it clipped ahead of its reveal. Reveals wipe, never
   fade: nothing on the page is ever partly transparent. */
.js [data-reveal] {
  visibility: hidden; transform: translateY(24px);
  transition: visibility var(--dur-slow), transform var(--dur-slow) var(--ease-out);
}
.js [data-reveal].in { visibility: visible; transform: none; }
.js [data-lines] .line {
  display: block; clip-path: inset(0 0 100% 0); transform: translateY(0.4em);
  transition: clip-path var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
[data-lines] .line { display: block; }
/* On narrow screens let the display type wrap naturally rather than on the
   art-directed desktop line breaks. */
@media (max-width: 720px) {
  [data-lines] .line, .js [data-lines] .line { display: inline; }
  [data-lines] .line::after { content: " "; }
}
.js [data-lines].in .line { clip-path: inset(0 0 0 0); transform: none; }
.js .plate img, .js .plate svg {
  clip-path: inset(0 0 100% 0); transform: scale(1.04);
  transition: clip-path var(--dur-slower) var(--ease-editorial), transform var(--dur-slower) var(--ease-editorial);
}
.js .plate.in img, .js .plate.in svg { clip-path: inset(0 0 0 0); transform: scale(1); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important; scroll-behavior: auto !important;
  }
  .js [data-reveal] { visibility: visible; transform: none; }
  .js [data-lines] .line { clip-path: none; transform: none; }
  .js .plate img, .js .plate svg { clip-path: none; transform: none; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .mobile-menu, .nav-toggle { display: none; }
  body { background: #fff; color: #000; }
}