:root{
  color-scheme: green;
  --bg: #0b0f15;
  --surface: #111823;
  --surface-2: #172233;
  --text: #e9eef6;
  --muted: #b8c4d6;
  --border: rgba(255,255,255,.12);
  --accent: #61dafb;
  --accent-2: #9be7ff;

  --radius: 16px;
  --shadow: 0 12px 30px rgba(0,0,0,.35);
  --max: 980px;
  --gap: 16px;
  --gap-lg: 24px;
}

/* Light mode override */
@media (prefers-color-scheme: light){
  :root{
    --bg: #f6f8fb;
    --surface: #ffffff;
    --surface-2: #f0f5ff;
    --text: #0b1220;
    --muted: #3b4b66;
    --border: rgba(11,18,32,.14);
    --accent: #0b6ef3;
    --accent-2: #2a86ff;
    --shadow: 0 10px 24px rgba(11,18,32,.10);
  }
}

*{ box-sizing: border-box; }

html:focus-within{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html:focus-within{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height: 1.5;
  background:
    radial-gradient(1200px 500px at 20% -10%, rgba(97,218,251,.18), transparent 55%),
    radial-gradient(1000px 500px at 90% 0%, rgba(11,110,243,.14), transparent 55%),
    var(--bg);
  color: var(--text);
}

a{ color: inherit; text-underline-offset: 3px; }
a:hover{ text-decoration-thickness: 2px; }

/* Skip link */
.skip-link{
  position: absolute;
  left: -999px;
  top: 8px;
  padding: 10px 12px;
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 12px;
  z-index: 9999;
}
.skip-link:focus{ left: 8px; }

/* Focus ring */
:focus-visible{
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 10px;
}

header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 16px;
}

.topbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand{ display: grid; gap: 2px; }
.brand strong{ font-size: 1.5rem; letter-spacing: .3px; }
.brand span{ color: var(--muted); font-size: .92rem; }

.nav{
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}

.nav a{
  display: inline-block;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  color: var(--muted);
}

.nav a[aria-current="page"],
.nav a:hover{
  color: var(--text);
  border-color: var(--border);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
}

.btn{
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 12px;
  font-weight: 600;
  cursor: pointer;
}

.btn.primary{
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 22%, var(--surface)) 0%,
    var(--surface) 80%
  );
}

.btn:active{ transform: translateY(1px); }

main{ padding: 18px 0 48px; }

.hero{ padding: 18px 0 6px; }

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-grid{ display: grid; gap: var(--gap-lg); }

.hero-content{ padding: 18px; }

h1{
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lede{
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 65ch;
}

.meta{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 14px 0 0;
}

.pill{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
  color: var(--text);
  font-size: .95rem;
}
.pill small{ color: var(--muted); }

.hero-actions{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

section{ margin-top: 18px; }

.section-head{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 22px 0 10px;
  padding: 0 2px;
}

.section-head-tight{ margin-top: 18px; }

h2{ margin: 0; font-size: 1.25rem; letter-spacing: -0.01em; }
.hint{ color: var(--muted); margin: 0; font-size: .95rem; }

.grid{ display: grid; gap: var(--gap); }

@media (min-width: 720px){
  .hero-grid{ grid-template-columns: 1.35fr .65fr; align-items: stretch; }
  .grid.cols-3{ grid-template-columns: repeat(3, 1fr); }
  .grid.cols-2{ grid-template-columns: repeat(2, 1fr); }
}

.tile{
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
}
.tile h3{ margin: 0 0 6px; font-size: 1.05rem; }
.tile p{ margin: 0; color: var(--muted); }

.aside{ padding: 16px; }
.aside h2{ font-size: 1.1rem; }
.aside ul{ margin: 10px 0 0; padding-left: 18px; color: var(--muted); }
.aside li{ margin: 6px 0; }

/* Cards inside sections */
.section-card{
  padding: 16px;
}
.section-card p{
  margin: 0;
  color: var(--muted);
}

/* Timeline */
.timeline{ padding: 12px 14px; }
.step{
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 10px;
  padding: 12px 8px;
  border-top: 1px dashed var(--border);
}
.step:first-child{ border-top: 0; }
.dot{
  width: 14px;
  height: 14px;
  border-radius: 999px;
  margin-top: 4px;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}
.step strong{ display: block; }
.step span{ color: var(--muted); }

/* FAQ accordion */
.faq{ overflow: hidden; }
.faq-item{ border-top: 1px solid var(--border); }
.faq-item:first-child{ border-top: 0; }

.faq-q{
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  background: transparent;
  border: 0;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 1rem;
  cursor: pointer;
}
.chev{
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  transition: transform .2s ease;
}
.faq-q[aria-expanded="true"] .chev{ transform: rotate(180deg); }

.faq-a{
  padding: 0 16px 14px;
  color: var(--muted);
}
.faq-a p{ margin: 8px 0 0; }

/* Contact */
.contact-card{
  padding: 16px;
}
.contact-card h3{
  margin: 0 0 8px;
}
.contact-card p{
  margin: 0;
  color: var(--muted);
}
.contact-actions{
  margin-top: 12px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Footer */
footer{
  margin-top: 22px;
  padding: 22px 0 30px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}
.foot-grid{
  display: grid;
  gap: 12px;
}
@media (min-width: 720px){
  .foot-grid{ grid-template-columns: 1.2fr .8fr; align-items: start; }
}
.foot-title{ margin: 0 0 6px; }
.foot-muted{ margin: 0; }

.notice{
  border-left: 4px solid var(--accent);
  padding: 10px 12px;
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
  border-radius: 12px;
  color: var(--muted);
}

.sr-only{
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}