/* ==========================================================================
   RCET shared design system  —  served at /shared/rcet.css
   Every team page loads this so the site reads as one site.
   It is the source of truth for colour, type, spacing and the shared
   header/footer. Team pages override things in their own <style>;
   nobody edits this file from a team folder (CI will reject it).

   Order: tokens → base → layout → components → utilities
   ========================================================================== */
@import url("https://fonts.googleapis.com/css2?family=Azeret+Mono:wght@400;500;600&family=Inter+Tight:wght@600;700;800&family=Inter:wght@400;500;600&display=swap");

/* ------------------------------------------------------------------ tokens */
:root {
  /* Brand colours (from the main RCET site) */
  --rcet-navy: #192e4f;
  --rcet-blue: #1a6aff;
  --rcet-cyan: #1ad7ff;
  --rcet-pale: #d3e4ff;
  --rcet-ink:  #0f172a;

  /* Surfaces — light theme is the default and matches rotmancommercetech.com */
  --rcet-bg:        #ffffff;
  --rcet-bg-alt:    #f3f6fb;
  --rcet-surface:   #ffffff;
  --rcet-line:      #e2e8f0;
  --rcet-fg:        var(--rcet-ink);
  --rcet-muted:     #5b6577;
  --rcet-accent:    var(--rcet-blue);
  --rcet-accent-fg: #ffffff;
  --rcet-link:      var(--rcet-blue);

  /* Type */
  --rcet-font-display: "Inter Tight", Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --rcet-font-body:    Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --rcet-font-mono:    "Azeret Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Shape & rhythm */
  --rcet-radius:    12px;
  --rcet-radius-sm: 8px;
  --rcet-shadow:    0 1px 2px rgba(15, 23, 42, .05), 0 10px 28px -14px rgba(25, 46, 79, .22);
  --rcet-container: 1120px;
  --rcet-gutter:    24px;
  --rcet-section-y: clamp(56px, 8vw, 96px);
}

/* Opt in with <html data-theme="dark"> */
[data-theme="dark"] {
  --rcet-bg:        #0b1220;
  --rcet-bg-alt:    #101a2e;
  --rcet-surface:   #121e33;
  --rcet-line:      #223252;
  --rcet-fg:        #e8eef8;
  --rcet-muted:     #9aa8bd;
  --rcet-accent:    var(--rcet-cyan);
  --rcet-accent-fg: #06101f;
  --rcet-link:      #7cc4ff;
  --rcet-shadow:    0 1px 2px rgba(0, 0, 0, .4), 0 14px 36px -14px rgba(0, 0, 0, .7);
  color-scheme: dark;
}

/* -------------------------------------------------------------------- base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--rcet-bg);
  color: var(--rcet-fg);
  font: 400 17px/1.65 var(--rcet-font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 {
  font-family: var(--rcet-font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 .5em;
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 6vw, 68px); font-weight: 800; }
h2 { font-size: clamp(28px, 3.6vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 22px); letter-spacing: -0.01em; }
h4 { font-size: 17px; }
p  { margin: 0 0 1em; }
a  { color: var(--rcet-link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
img, video { max-width: 100%; height: auto; display: block; }
::selection { background: var(--rcet-cyan); color: var(--rcet-navy); }
:focus-visible { outline: 3px solid var(--rcet-cyan); outline-offset: 2px; }

/* ------------------------------------------------------------------ layout */
.rcet-container { max-width: var(--rcet-container); margin: 0 auto; padding: 0 var(--rcet-gutter); }
.rcet-section   { padding: var(--rcet-section-y) 0; }
.rcet-section--alt  { background: var(--rcet-bg-alt); }
.rcet-section--dark {
  background: var(--rcet-navy); color: #fff;
  --rcet-fg: #fff; --rcet-muted: #b7c5dc;
  --rcet-surface: rgba(255, 255, 255, .06); --rcet-line: rgba(255, 255, 255, .14);
  --rcet-link: var(--rcet-cyan); --rcet-accent: var(--rcet-cyan); --rcet-accent-fg: var(--rcet-navy);
}
.rcet-hero  { padding: clamp(64px, 10vw, 128px) 0 var(--rcet-section-y); }
.rcet-lede  { font-size: clamp(18px, 2vw, 22px); color: var(--rcet-muted); max-width: 60ch; }
.rcet-prose { max-width: 68ch; }
.rcet-grid    { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.rcet-grid--2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); }
.rcet-grid--3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.rcet-grid--4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr)); }
/* Centre the last row of a card grid (five cards in three columns, four in three…) */
.rcet-grid--wrap-center { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; }
.rcet-grid--wrap-center > * { flex: 1 1 260px; max-width: 344px; }
/* Cinematic image treatment: bigger radius, soft cyan-tinted shadow */
.rcet-cinematic { border-radius: 20px; box-shadow: 0 30px 70px -28px rgba(26, 215, 255, .3), 0 16px 40px -18px rgba(15, 23, 42, .45); }
.rcet-section-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 32px; }
.rcet-section-head h2 { margin: 0; }
.rcet-section-head p  { margin: 0; color: var(--rcet-muted); max-width: 48ch; }

/* -------------------------------------------------------------- components */
/* Small mono label above a heading: <p class="rcet-eyebrow">What we do</p> */
.rcet-eyebrow {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 14px;
  font-family: var(--rcet-font-mono); font-size: 12px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--rcet-accent);
}
.rcet-eyebrow::before { content: ""; width: 22px; height: 2px; background: currentColor; border-radius: 2px; }

/* Card. Use <a class="rcet-card"> for a clickable one. */
.rcet-card {
  background: var(--rcet-surface); border: 1px solid var(--rcet-line);
  border-radius: var(--rcet-radius); padding: 24px; box-shadow: var(--rcet-shadow);
}
.rcet-card h3 { margin-top: 0; }
.rcet-card > :last-child { margin-bottom: 0; }
a.rcet-card { display: block; color: inherit; text-decoration: none; transition: transform .15s ease, border-color .15s ease; }
a.rcet-card:hover { transform: translateY(-2px); border-color: var(--rcet-accent); }

/* Buttons: .rcet-btn (outline) .rcet-btn--primary (filled) .rcet-btn--ghost (quiet) */
.rcet-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: 600 15px/1 var(--rcet-font-body); padding: 14px 22px; border-radius: 999px;
  border: 1.5px solid var(--rcet-accent); color: var(--rcet-accent); background: transparent;
  text-decoration: none; cursor: pointer; transition: background .15s, color .15s, transform .15s, filter .15s;
}
.rcet-btn:hover { transform: translateY(-1px); text-decoration: none; }
.rcet-btn--primary { background: var(--rcet-accent); color: var(--rcet-accent-fg); }
.rcet-btn--primary:hover { filter: brightness(1.08); }
.rcet-btn--ghost { border-color: var(--rcet-line); color: var(--rcet-fg); }
.rcet-btn--ghost:hover { border-color: var(--rcet-accent); }
.rcet-btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* Pill tag: <span class="rcet-tag">Data & AI</span> */
.rcet-tag {
  display: inline-block; font-family: var(--rcet-font-mono); font-size: 12px; letter-spacing: .04em;
  padding: 4px 10px; border-radius: 999px; background: var(--rcet-pale); color: var(--rcet-navy);
}
[data-theme="dark"] .rcet-tag, .rcet-section--dark .rcet-tag { background: rgba(26, 215, 255, .14); color: var(--rcet-cyan); }

/* Big number: <div class="rcet-stat"><b>27</b><span>events</span></div> */
.rcet-stat { display: grid; gap: 4px; }
.rcet-stat b    { font: 800 clamp(40px, 5vw, 56px)/1 var(--rcet-font-display); letter-spacing: -.03em; color: var(--rcet-accent); }
.rcet-stat span { font-family: var(--rcet-font-mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--rcet-muted); }

/* Person row: avatar (initials or <img>) + name + role */
.rcet-person { display: flex; gap: 16px; align-items: center; }
.rcet-avatar {
  flex: none; width: 56px; height: 56px; border-radius: 50%; object-fit: cover;
  display: grid; place-items: center; background: var(--rcet-navy); color: #fff;
  font: 700 18px/1 var(--rcet-font-display); letter-spacing: -.02em;
}
.rcet-person b    { display: block; font-weight: 600; }
.rcet-person span { color: var(--rcet-muted); font-size: 15px; }

/* Site header — rendered by <rcet-header> from /shared/rcet.js */
.rcet-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--rcet-bg);
  background: color-mix(in srgb, var(--rcet-bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px); -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--rcet-line);
}
.rcet-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 64px; }
.rcet-brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.rcet-brand__logo { flex: none; width: 36px; height: 36px; object-fit: contain; }
.rcet-brand__text   { font: 600 13px/1.15 var(--rcet-font-body); letter-spacing: .01em; color: var(--rcet-muted); }
.rcet-brand__text b { display: block; font-weight: 700; color: var(--rcet-fg); }
.rcet-header__nav { display: flex; align-items: center; gap: 20px; font-size: 14px; font-weight: 500; }
.rcet-header__nav a { color: var(--rcet-fg); text-decoration: none; opacity: .85; }
.rcet-header__nav a:hover { opacity: 1; color: var(--rcet-accent); }
.rcet-header__nav a[aria-current="page"] { opacity: 1; color: var(--rcet-accent); }
.rcet-header__current {
  font-family: var(--rcet-font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--rcet-accent); padding-left: 20px; border-left: 1px solid var(--rcet-line);
}
@media (max-width: 560px) {
  .rcet-header__current { display: none; }
  .rcet-header .rcet-brand__text { display: none; }
  .rcet-header__nav { gap: 16px; }
}

/* Site footer — rendered by <rcet-footer> from /shared/rcet.js */
.rcet-footer {
  border-top: 1px solid var(--rcet-line); margin-top: var(--rcet-section-y);
  padding: 48px 0 40px; font-size: 14px; color: var(--rcet-muted);
}
.rcet-footer__inner { display: grid; gap: 24px; grid-template-columns: 1fr auto; align-items: start; }
.rcet-footer__inner p { margin: 8px 0 0; }
.rcet-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.rcet-footer a   { color: inherit; }
.rcet-footer__note { grid-column: 1 / -1; padding-top: 20px; border-top: 1px dashed var(--rcet-line); font-size: 13px; }
@media (max-width: 640px) { .rcet-footer__inner { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------- utilities */
.rcet-muted  { color: var(--rcet-muted); }
.rcet-accent { color: var(--rcet-accent); }
.rcet-mono   { font-family: var(--rcet-font-mono); }
.rcet-center { text-align: center; }
.rcet-visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ------------------------------------------------------------ icons */
/* <svg class="rcet-icon"><use href="/shared/assets/icons.svg#megaphone"/></svg>  (Lucide, see shared/assets/README.md) */
.rcet-icon { width: 1.25em; height: 1.25em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; vertical-align: -.2em; flex: none; }
.rcet-icon--lg { width: 26px; height: 26px; }
.rcet-icon-badge { display: inline-grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: var(--rcet-pale); color: var(--rcet-navy); }
[data-theme="dark"] .rcet-icon-badge, .rcet-section--dark .rcet-icon-badge { background: rgba(26, 215, 255, .14); color: var(--rcet-cyan); }

/* ------------------------------------------------------- backgrounds */
.rcet-bg-dots { background-image: radial-gradient(var(--rcet-pale) 1.5px, transparent 1.5px); background-size: 22px 22px; }
.rcet-bg-mesh {
  background-image:
    radial-gradient(40% 50% at 15% 20%, rgba(26, 106, 255, .14), transparent),
    radial-gradient(35% 45% at 85% 15%, rgba(26, 215, 255, .18), transparent),
    radial-gradient(50% 60% at 50% 100%, rgba(25, 46, 79, .08), transparent);
}
/* Constellation canvas: <section class="rcet-hero rcet-hero--art" data-constellation> … (rcet.js draws it) */
.rcet-hero--art { position: relative; overflow: hidden; }
.rcet-hero--art > .rcet-container { position: relative; }
.rcet-constellation { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

/* --------------------------------------------------- reveal on scroll */
/* Add data-reveal to an element; optional style="--i: 2" staggers siblings. Hidden only once rcet.js has loaded. */
.rcet-js [data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; transition-delay: calc(var(--i, 0) * 70ms); }
.rcet-js [data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .rcet-js [data-reveal] { opacity: 1; transform: none; transition: none; } }

/* ------------------------------------------------------------ marquee */
/* <div class="rcet-marquee"><div class="rcet-marquee__track"> …logos, then the same logos again… </div></div> */
.rcet-marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.rcet-marquee__track { display: flex; align-items: center; gap: 64px; width: max-content; padding: 8px 0; animation: rcet-marquee 45s linear infinite; }
.rcet-marquee:hover .rcet-marquee__track { animation-play-state: paused; }
.rcet-marquee__track img { height: 34px; width: auto; max-width: 160px; object-fit: contain; opacity: .8; filter: grayscale(1) brightness(.7) contrast(1.15); transition: opacity .2s, filter .2s; }
.rcet-marquee__track img:hover { opacity: 1; filter: none; }
.rcet-marquee__track img.rcet-invert { filter: invert(1) grayscale(1) brightness(.7) contrast(1.15); }
.rcet-marquee__track img.rcet-invert:hover { filter: invert(1); }
@keyframes rcet-marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .rcet-marquee { mask-image: none; -webkit-mask-image: none; } .rcet-marquee__track { animation: none; width: auto; flex-wrap: wrap; justify-content: center; gap: 32px 48px; } }

/* Scroll-lit statement: add data-words to a heading (rcet.js splits it into words) */
.rcet-word { opacity: .22; transition: opacity .35s ease; }
.rcet-word.on { opacity: 1; }
@media (prefers-reduced-motion: reduce) { .rcet-word { opacity: 1; transition: none; } }

/* ------------------------------------------ team cards, partner strip */
.team-card { display: grid; gap: 10px; align-content: start; min-height: 100%; }
.team-card .rcet-icon-badge { margin-bottom: 6px; }
.team-card h3 { margin: 4px 0 0; }
.team-card p { color: var(--rcet-muted); margin: 0; }
.team-card .go { margin-top: auto; padding-top: 12px; font-size: 14px; font-weight: 600; color: var(--rcet-accent); }
.team-card--soon { border-style: dashed; box-shadow: none; background: transparent; }
.team-card--soon .go { color: var(--rcet-muted); font-weight: 500; }
.partners { padding: 28px 0 8px; }
.partners .rcet-eyebrow { margin-bottom: 8px; }

/* -------------------------------------------------- skip link, print */
.rcet-skip { position: absolute; left: 16px; top: -100px; z-index: 100; padding: 10px 16px; border-radius: 999px; background: var(--rcet-navy); color: #fff; font-weight: 600; text-decoration: none; }
.rcet-skip:focus { top: 12px; }
@media print {
  .rcet-header, .rcet-footer nav, .rcet-btn, .rcet-constellation, .rcet-marquee { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: .85em; color: #555; }
}
