/* Public site. Tokens live in brand.css; no raw colours here. Spec: docs/brand/BRAND_BOOK.md */
*, *::before, *::after { box-sizing: border-box; }
/* Public site is light only (html[data-theme=light] opts out of the dark tokens in brand.css). */
html[data-theme="light"] { color-scheme: light; }
/* Public site only: a step smaller on the large type, more air between sections. */
:root { --rada-text-hero: clamp(2.25rem, 1.3rem + 4vw, 3.75rem); --rada-text-h2: clamp(1.375rem, 1.1rem + 1vw, 1.875rem); }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background-color: var(--rada-bg); background-image: var(--rada-grain); color: var(--rada-ink);
  font: 400 var(--rada-text-base)/var(--rada-leading-body) var(--rada-font);
  font-optical-sizing: auto; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration-color: var(--rada-accent); text-underline-offset: 0.25em; text-decoration-thickness: 1px; }
a:hover { color: var(--rada-accent); }
:focus-visible { outline: 2px solid var(--rada-accent); outline-offset: 3px; border-radius: var(--rada-radius-sm); }
h1, h2, h3, p { margin: 0; }
.skip { position: absolute; left: var(--rada-space-3); top: -4rem; background: var(--rada-ink); color: var(--rada-bg); padding: var(--rada-space-2) var(--rada-space-3); border-radius: var(--rada-radius-sm); z-index: 30; }
.skip:focus { top: var(--rada-space-3); }
.wrap { max-width: 64rem; margin-inline: auto; padding-inline: var(--rada-space-4); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--rada-bg) 88%, transparent); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid var(--rada-line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--rada-space-4); min-height: 3.5rem; }
.mark { display: inline-flex; align-items: center; gap: var(--rada-space-2); font-weight: 600; font-size: var(--rada-text-sm); letter-spacing: var(--rada-track-mark); text-decoration: none; color: var(--rada-ink); }
.mark:hover { color: var(--rada-ink); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--rada-accent); margin-top: -1px; }
.nav { display: flex; align-items: center; gap: var(--rada-space-4); font-size: var(--rada-text-sm); }
.nav a { color: var(--rada-muted); text-decoration: none; padding-block: var(--rada-space-1); border-bottom: 1px solid transparent; transition: color var(--rada-fast) var(--rada-ease); white-space: nowrap; }
.nav a:hover { color: var(--rada-ink); }
.nav a[aria-current="page"] { color: var(--rada-ink); border-bottom-color: var(--rada-accent); }
.nav a.cta { color: var(--rada-on-accent); background: var(--rada-accent); padding: var(--rada-space-1) var(--rada-space-3); border-radius: var(--rada-radius-pill); border: 0; font-weight: 500; }
.nav a.cta:hover { opacity: 0.88; color: var(--rada-on-accent); }
.nav a.cta[aria-current="page"] { outline: 2px solid var(--rada-ink); outline-offset: 2px; }

/* Buttons and pills */
.button { display: inline-block; background: var(--rada-accent); color: var(--rada-on-accent); text-decoration: none; font-weight: 500; font-size: var(--rada-text-base); padding: var(--rada-space-2) var(--rada-space-3); border-radius: var(--rada-radius-md); transition: transform var(--rada-fast) var(--rada-ease), opacity var(--rada-fast) var(--rada-ease); }
.button:hover { color: var(--rada-on-accent); opacity: 0.88; }
.button:active { transform: scale(0.97); }
.more { font-weight: 500; text-decoration: none; display: inline-flex; gap: var(--rada-space-2); align-items: center; }
.more::after { content: "\2192"; color: var(--rada-accent); transition: transform var(--rada-fast) var(--rada-ease); }
.more:hover::after { transform: translateX(3px); }
.pill { display: inline-flex; align-items: center; gap: var(--rada-space-2); font-size: var(--rada-text-xs); letter-spacing: var(--rada-track-label); text-transform: uppercase; color: var(--rada-muted); background: var(--rada-surface); border: 1px solid var(--rada-line); padding: var(--rada-space-1) var(--rada-space-3); border-radius: var(--rada-radius-pill); }
.pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--rada-accent); }

/* Hero, home */
.hero { position: relative; overflow: hidden; text-align: center; padding-block: var(--rada-space-9) var(--rada-space-8);
  background-image: radial-gradient(ellipse 70% 60% at 50% 0%, var(--rada-glow), transparent 70%); }
.hero::before, .page-head::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: var(--rada-contour);
  -webkit-mask: url("/contours.svg") center / cover no-repeat, linear-gradient(#000 35%, transparent 95%); -webkit-mask-composite: source-in;
  mask: url("/contours.svg") center / cover no-repeat, linear-gradient(#000 35%, transparent 95%); mask-composite: intersect; }
.hero .wrap { position: relative; }
.rings { position: absolute; left: 50%; top: 50%; width: min(64rem, 150vw); height: auto; transform: translate(-50%, -50%); pointer-events: none; color: var(--rada-line); }
.rings .ping { color: var(--rada-accent); }
.hero h1, .page-head h1 { font-weight: 500; letter-spacing: -0.035em; line-height: 1.04; text-wrap: balance; }
.hero h1 { font-size: var(--rada-text-hero); margin: var(--rada-space-4) auto var(--rada-space-3); max-width: 13em; }
.hero h1 span, .page-head h1 span { color: var(--rada-accent); display: block; }
.lead { color: var(--rada-muted); font-size: 1.0625rem; line-height: 1.55; max-width: 31em; text-wrap: pretty; }
.hero .lead { margin-inline: auto; }
.hero .lead em { font-style: normal; color: var(--rada-ink); }
.actions { display: flex; flex-wrap: wrap; gap: var(--rada-space-4); justify-content: center; align-items: center; margin-top: var(--rada-space-5); }

/* Stat strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--rada-line); border-radius: var(--rada-radius-lg); background: var(--rada-surface); overflow: hidden; }
.stats div { padding: var(--rada-space-4) var(--rada-space-3); text-align: center; border-left: 1px solid var(--rada-line); }
.stats div:first-child { border-left: 0; }
.stats b { display: block; font-weight: 500; font-size: var(--rada-text-h2); letter-spacing: -0.03em; line-height: 1.1; }
.stats span { color: var(--rada-muted); font-size: var(--rada-text-sm); }

/* Sections */
.section { padding-block: var(--rada-space-8); }
.section.tight { padding-block: var(--rada-space-6) var(--rada-space-8); }
.eyebrow { font-size: var(--rada-text-xs); letter-spacing: var(--rada-track-label); text-transform: uppercase; color: var(--rada-muted); }
h2 { font-weight: 500; font-size: var(--rada-text-h2); letter-spacing: -0.025em; line-height: 1.15; text-wrap: balance; }
h3 { font-weight: 500; font-size: var(--rada-text-lg); letter-spacing: -0.01em; line-height: 1.3; }
.sec-head { max-width: 36rem; margin-bottom: var(--rada-space-5); display: grid; gap: var(--rada-space-2); }
.sec-head p { color: var(--rada-muted); text-wrap: pretty; }
.muted { color: var(--rada-muted); }
.small { font-size: var(--rada-text-sm); }

/* Split: sample answer next to text */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: var(--rada-space-7); align-items: center; }
.split .copy { display: grid; gap: var(--rada-space-3); max-width: 26rem; }
.split .copy p { color: var(--rada-muted); text-wrap: pretty; }
.answer { background: var(--rada-surface); border: 1px solid var(--rada-line); border-radius: var(--rada-radius-lg); padding: var(--rada-space-4); box-shadow: var(--rada-shadow); display: grid; gap: var(--rada-space-3); }
.answer .q { background: var(--rada-bg); border: 1px solid var(--rada-line); border-radius: var(--rada-radius-md); padding: var(--rada-space-2) var(--rada-space-3); width: fit-content; max-width: 90%; margin-left: auto; font-size: var(--rada-text-sm); }
.answer .a { text-wrap: pretty; }
.cite { display: inline-flex; gap: var(--rada-space-2); align-items: center; width: fit-content; font-size: var(--rada-text-sm); background: var(--rada-accent-soft); border-radius: var(--rada-radius-pill); padding: var(--rada-space-1) var(--rada-space-3); }
.cite::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--rada-accent); }
.answer .tag { font-size: var(--rada-text-xs); color: var(--rada-muted); letter-spacing: var(--rada-track-label); text-transform: uppercase; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--rada-space-3); }
.cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cards.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { display: grid; align-content: start; gap: var(--rada-space-2); background: var(--rada-surface); border: 1px solid var(--rada-line); border-radius: var(--rada-radius-lg); padding: var(--rada-space-4); text-decoration: none; color: inherit; transition: transform var(--rada-slow) var(--rada-ease), box-shadow var(--rada-slow) var(--rada-ease), border-color var(--rada-fast) var(--rada-ease); }
a.card:hover { transform: translateY(-3px); box-shadow: var(--rada-shadow); border-color: var(--rada-muted); color: inherit; }
.card p { color: var(--rada-muted); font-size: var(--rada-text-sm); text-wrap: pretty; }
.card .num { font-size: var(--rada-text-xs); letter-spacing: 0.04em; color: var(--rada-accent); font-variant-numeric: tabular-nums; }
.card .more { margin-top: var(--rada-space-2); font-size: var(--rada-text-sm); }
.chips { display: flex; flex-wrap: wrap; gap: var(--rada-space-2); margin-top: var(--rada-space-1); }
.chip { font-size: var(--rada-text-sm); background: var(--rada-bg); border: 1px solid var(--rada-line); border-radius: var(--rada-radius-pill); padding: 2px var(--rada-space-3); }
.avatar { width: 2.5rem; height: 2.5rem; border-radius: 50%; background: var(--rada-accent-soft); display: grid; place-items: center; font-weight: 500; font-size: var(--rada-text-sm); letter-spacing: 0.02em; margin-bottom: var(--rada-space-2); }
.big { font-weight: 500; font-size: clamp(3rem, 2rem + 4vw, 4.5rem); letter-spacing: -0.04em; line-height: 1; color: var(--rada-accent); }

/* Dark panel */
.panel { background: var(--rada-panel); color: var(--rada-on-panel); border: 1px solid var(--rada-line); border-radius: var(--rada-radius-lg); padding: var(--rada-space-6) var(--rada-space-5); display: grid; gap: var(--rada-space-3); position: relative; overflow: hidden; }
.panel h2 { max-width: 16em; }
.panel p { color: var(--rada-on-panel-muted); max-width: 30em; text-wrap: pretty; }
.panel .eyebrow { color: var(--rada-panel-accent); }
.panel a { color: var(--rada-on-panel); text-decoration-color: var(--rada-panel-accent); }
.panel a:hover { color: var(--rada-panel-accent); }
.panel .quote { font-weight: 500; font-size: var(--rada-text-h2); letter-spacing: -0.025em; line-height: 1.15; color: var(--rada-on-panel); max-width: 18em; text-wrap: balance; }

/* Inner page head */
.page-head { position: relative; overflow: hidden; padding-block: var(--rada-space-8) var(--rada-space-6);
  background-image: radial-gradient(ellipse 60% 90% at 0% 0%, var(--rada-glow), transparent 70%); }
.page-head .wrap { position: relative; display: grid; gap: var(--rada-space-3); justify-items: start; }
.page-head h1 { font-size: clamp(2.125rem, 1.4rem + 3.2vw, 3.5rem); max-width: 14em; }
.page-head .rings { left: auto; right: -12rem; top: 40%; width: 44rem; transform: translateY(-50%); }

/* Steps timeline */
.timeline { list-style: none; margin: 0; padding: 0; counter-reset: s; display: grid; gap: var(--rada-space-3); }
.timeline li { counter-increment: s; display: grid; grid-template-columns: 3rem minmax(0, 1fr); column-gap: var(--rada-space-3); padding: var(--rada-space-4); background: var(--rada-surface); border: 1px solid var(--rada-line); border-radius: var(--rada-radius-lg); }
.timeline li::before { content: counter(s, decimal-leading-zero); font-size: var(--rada-text-sm); color: var(--rada-accent); font-variant-numeric: tabular-nums; padding-top: 0.2em; }
.timeline p { color: var(--rada-muted); font-size: var(--rada-text-sm); margin-top: var(--rada-space-1); text-wrap: pretty; }

/* Two column text */
.cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--rada-space-6); }
.cols p { color: var(--rada-muted); text-wrap: pretty; }
.cols p + p { margin-top: var(--rada-space-3); }

/* Next page strip */
.next { border-top: 1px solid var(--rada-line); padding-block: var(--rada-space-5); display: flex; justify-content: space-between; align-items: center; gap: var(--rada-space-3); flex-wrap: wrap; }

/* Footer */
.site-footer { border-top: 1px solid var(--rada-line); margin-top: var(--rada-space-7); padding-block: var(--rada-space-6) var(--rada-space-5); color: var(--rada-muted); font-size: var(--rada-text-sm); }
.foot { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--rada-space-5); }
.foot p { margin-top: var(--rada-space-2); max-width: 22em; }
.foot h2 { font-size: var(--rada-text-xs); letter-spacing: var(--rada-track-label); text-transform: uppercase; color: var(--rada-muted); font-weight: 500; margin-bottom: var(--rada-space-2); }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--rada-space-1); }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--rada-accent); }
.legal { margin-top: var(--rada-space-5); padding-top: var(--rada-space-3); border-top: 1px solid var(--rada-line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--rada-space-2); font-size: var(--rada-text-xs); }

/* Responsive */
@media (max-width: 52rem) {
  .cards, .cards.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split, .cols { grid-template-columns: 1fr; gap: var(--rada-space-5); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div:nth-child(3) { border-left: 0; }
  .stats div:nth-child(n+3) { border-top: 1px solid var(--rada-line); }
}
@media (max-width: 40rem) {
  .wrap { padding-inline: var(--rada-space-3); }
  .site-header .wrap { flex-wrap: wrap; row-gap: 0; padding-block: var(--rada-space-2) 0; }
  .nav { order: 3; width: 100%; overflow-x: auto; gap: var(--rada-space-3); padding-block: var(--rada-space-1) var(--rada-space-2); scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .hero { padding-block: var(--rada-space-8) var(--rada-space-7); }
  .section { padding-block: var(--rada-space-7); }
  .cards, .cards.two, .cards.four { grid-template-columns: 1fr; }
  .foot { grid-template-columns: 1fr 1fr; }
  .foot > :first-child { grid-column: 1 / -1; }
  .panel { padding: var(--rada-space-5) var(--rada-space-4); }
  .page-head { padding-block: var(--rada-space-7) var(--rada-space-5); }
  .page-head .rings { right: -22rem; }
}

/* Motion: gentle arrival and scroll reveal, off under reduced motion */
@media (prefers-reduced-motion: no-preference) {
  .hero .wrap > *, .page-head .wrap > * { animation: rise var(--rada-slow) var(--rada-ease) both; }
  .hero .wrap > :nth-child(2), .page-head .wrap > :nth-child(2) { animation-delay: 80ms; }
  .hero .wrap > :nth-child(3), .page-head .wrap > :nth-child(3) { animation-delay: 160ms; }
  .hero .wrap > :nth-child(4) { animation-delay: 240ms; }
  .rings .ping { transform-origin: center; transform-box: fill-box; animation: ping 4.5s var(--rada-ease) infinite; }
  .js .reveal { opacity: 0; transform: translateY(16px); transition: opacity 700ms var(--rada-ease), transform 700ms var(--rada-ease); }
  .js .reveal.in { opacity: 1; transform: none; }
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes ping { 0% { opacity: 0.7; transform: scale(0.6); } 70%, 100% { opacity: 0; transform: scale(1.15); } }

/* Names link to LinkedIn: a faint underline, accent on hover */
a.plain { text-decoration-color: var(--rada-line); text-decoration-thickness: 1px; text-underline-offset: 0.25em; }
a.plain:hover { text-decoration-color: var(--rada-accent); }