:root {
  --gm-purple: #7C29ED;
  --gm-purple-dark: #5C18B9;
  --gm-purple-soft: #F3EBFD;
  --gm-lilac: #B88CF3;
  --ink: #241D2F;
  --muted: #625B6B;
  --line: #E6DFF0;
  --paper: #FFFFFF;
  --panel: #FAF8FC;
  --focus: #2F6FED;
  --success: #186A3B;
  --max-width: 1020px;
  --radius: 14px;
  --shadow: 0 8px 28px rgba(54, 31, 73, .07);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--gm-purple-dark); }
a:hover { color: var(--gm-purple); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: .7rem 1rem;
  background: var(--ink);
  color: white;
}
.skip-link:focus { left: .75rem; top: .75rem; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.97);
}
.header-inner,
main,
.footer-inner {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: .85rem 0;
}
.brand { text-decoration: none; color: var(--ink); min-width: max-content; }
.brand-name { display: block; font-weight: 800; letter-spacing: -.02em; }
.brand-parent { display: block; margin-top: .02rem; font-size: .72rem; color: var(--muted); }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .25rem .4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  display: block;
  padding: .45rem .58rem;
  border-radius: 8px;
  color: var(--ink);
  text-decoration: none;
  font-size: .94rem;
  font-weight: 650;
}
.nav-list a:hover { background: var(--gm-purple-soft); color: var(--gm-purple-dark); }
.nav-list a[aria-current="page"] { color: var(--gm-purple-dark); background: var(--gm-purple-soft); }

main { padding: 2rem 0 2.5rem; }
section { margin-top: 1.55rem; }
section:first-child { margin-top: 0; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.025em; }
h1 { margin: 0; font-size: clamp(2rem, 5vw, 3.6rem); }
h2 { margin: 0 0 .65rem; font-size: clamp(1.45rem, 3vw, 2rem); }
h3 { margin: 0 0 .35rem; font-size: 1.08rem; }
p { margin: .55rem 0; }
.lead { font-size: clamp(1.06rem, 2.3vw, 1.25rem); color: var(--muted); }
.kicker { margin: 0 0 .4rem; color: var(--gm-purple-dark); font-weight: 800; font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; }

.hero {
  padding: clamp(1.15rem, 3vw, 2rem) 0 1rem;
  border-bottom: 1px solid var(--line);
}
.hero-date {
  display: inline-block;
  margin: .9rem 0 .3rem;
  padding: .4rem .7rem;
  border-radius: 999px;
  background: var(--gm-purple-soft);
  color: var(--gm-purple-dark);
  font-weight: 800;
}
.challenge-line {
  margin: .8rem 0;
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 850;
  color: var(--gm-purple-dark);
}
.tagline { font-weight: 850; letter-spacing: .03em; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .8rem;
}
.card,
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}
.card { padding: 1rem; }
.card p:last-child { margin-bottom: 0; }
.panel { padding: 1.1rem; background: var(--panel); }
.card-number {
  display: inline-flex;
  width: 1.8rem;
  height: 1.8rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gm-purple);
  color: white;
  font-weight: 800;
  font-size: .86rem;
  margin-bottom: .55rem;
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  padding: .68rem 1rem;
  background: var(--gm-purple);
  color: white;
  text-decoration: none;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.button:hover,
button:hover { background: var(--gm-purple-dark); color: white; }
.button.secondary { background: white; color: var(--gm-purple-dark); border: 1px solid var(--gm-lilac); }
.button.secondary:hover { background: var(--gm-purple-soft); }
.cta-row { margin-top: .85rem; }

.example-list,
.prompt-list,
.feature-list { margin: .65rem 0 0; padding-left: 1.2rem; }
.example-list li,
.feature-list li { margin: .3rem 0; }
.prompt-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .45rem .8rem;
}
.prompt-list li {
  border-left: 3px solid var(--gm-lilac);
  padding: .25rem 0 .25rem .65rem;
}

.form-card form { margin-top: .65rem; }
.field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.field { margin-bottom: .7rem; }
label { display: block; margin-bottom: .28rem; font-size: .9rem; font-weight: 750; }
input,
select {
  width: 100%;
  min-height: 44px;
  padding: .62rem .7rem;
  border: 1px solid #BDB5C6;
  border-radius: 9px;
  background: white;
  color: var(--ink);
  font: inherit;
}
.checkbox-row { display: flex; gap: .6rem; align-items: flex-start; }
.checkbox-row input { width: 1.15rem; min-height: 1.15rem; margin-top: .2rem; flex: 0 0 auto; }
.form-note,
.consent,
.status { font-size: .88rem; color: var(--muted); }
.status { min-height: 1.25rem; margin-top: .55rem; }
.status.success { color: var(--success); font-weight: 700; }
.prototype-note {
  margin-top: 1rem;
  padding: .7rem .85rem;
  border-left: 4px solid var(--gm-lilac);
  background: var(--gm-purple-soft);
  font-size: .88rem;
}

.tool-card .question { color: var(--muted); font-weight: 700; }
.tool-card .button { margin-top: .5rem; }
.divider { border: 0; border-top: 1px solid var(--line); margin: 1.5rem 0; }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
}
.footer-inner { padding: 1.25rem 0 1.4rem; text-align: center; }
.footer-links,
.social-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: .35rem .8rem;
  margin: .35rem 0;
}
.footer-links a,
.social-links a { color: var(--ink); text-decoration: none; }
.footer-links a:hover,
.social-links a:hover { color: var(--gm-purple-dark); text-decoration: underline; }
.social-link { display: inline-flex; align-items: center; gap: .3rem; }
.social-link svg { width: 18px; height: 18px; fill: currentColor; }
.copyright { margin-top: .55rem; color: var(--muted); font-size: .84rem; }

@media (max-width: 760px) {
  .header-inner { align-items: flex-start; flex-direction: column; gap: .6rem; }
  .nav-list { justify-content: flex-start; }
  .card-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .prompt-list { grid-template-columns: 1fr; }
  main { padding-top: 1.45rem; }
}

@media (max-width: 430px) {
  .header-inner, main, .footer-inner { width: min(calc(100% - 1.2rem), var(--max-width)); }
  .nav-list { gap: .15rem; }
  .nav-list a { padding: .42rem .46rem; font-size: .88rem; }
  .card, .panel { padding: .9rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}