:root {
  --ink: #1a2433;
  --ink-soft: #4a5568;
  --paper: #f7f1e4;
  --card: #fffdf8;
  --lab: #123a46;
  --lab-2: #1c5c6b;
  --bolt: #ef5a24;
  --gold: #f0c14a;
  --mint: #7ec8a3;
  --line: rgba(26, 36, 51, 0.12);
  --shadow: 0 18px 40px rgba(18, 58, 70, 0.16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% -10%, rgba(240, 193, 74, 0.28), transparent 36%),
    radial-gradient(circle at 100% 0%, rgba(239, 90, 36, 0.16), transparent 32%),
    var(--paper);
  font-family: "Nunito", system-ui, sans-serif;
  line-height: 1.55;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--lab-2); }
.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus { left: 12px; background: #fff; padding: 8px 12px; z-index: 20; }

.wrap {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(18, 58, 70, 0.94);
  backdrop-filter: blur(10px);
  color: #fff;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  flex-wrap: wrap;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-family: "Fredoka", sans-serif;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.brand small {
  display: block;
  font-family: "Nunito", sans-serif;
  font-size: 0.75rem;
  opacity: 0.8;
  font-weight: 500;
}
.nav-links {
  display: flex;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.nav-links a {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--gold); }
.nav-links a:focus-visible,
.chip:focus-visible,
.choices button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.hero {
  padding: 56px 0 28px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gold);
  color: var(--ink);
  font-weight: 800;
  border-radius: 999px;
  padding: 6px 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
}
h1, h2, h3 { font-family: "Fredoka", sans-serif; line-height: 1.15; margin: 0 0 12px; }
h1 { font-size: clamp(2.2rem, 6vw, 4.2rem); max-width: 16ch; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
.lede {
  font-size: 1.2rem;
  max-width: 48ch;
  color: var(--ink-soft);
}
.aka {
  margin: 10px 0 18px;
  font-size: 1.35rem;
  font-weight: 800;
}
.aka em {
  font-style: normal;
  background: var(--bolt);
  color: #fff;
  padding: 2px 10px;
  border-radius: 8px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}
.portrait {
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 6px solid #fff;
  transform: rotate(1.5deg);
}
.portrait img { width: 100%; height: 320px; object-fit: cover; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--ink);
  text-decoration: none;
  display: inline-block;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.chip:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(18, 58, 70, 0.14);
  border-color: var(--bolt);
}

section { padding: 36px 0; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease;
}
.card:hover { transform: translateY(-3px); }
.card ol { margin: 0 0 14px; padding-left: 1.2em; }
.card li { margin: 6px 0; }
.section-kicker {
  color: var(--bolt);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin-bottom: 8px;
}

.two, .videos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.video {
  position: relative;
  padding-top: 56.25%;
  border-radius: 18px;
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow);
}
.video iframe,
.video video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #000;
}
.video video { object-fit: contain; }
.caption {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
}
.fact {
  background: var(--lab);
  color: #fff;
  border-radius: 18px;
  padding: 18px;
  transition: transform 0.18s ease;
}
.fact:hover { transform: translateY(-4px); }
.fact b { display: block; font-family: "Fredoka", sans-serif; font-size: 1.2rem; margin-bottom: 6px; }

.photo {
  border-radius: 20px;
  overflow: hidden;
  border: 5px solid #fff;
  box-shadow: var(--shadow);
}
.photo img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.photo:hover img { transform: scale(1.06); }

.timeline {
  display: grid;
  gap: 12px;
}
.step {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 14px;
  background: #fff;
  border-radius: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
}
.step span {
  font-family: "Fredoka", sans-serif;
  color: var(--bolt);
  font-weight: 700;
}

.recap {
  background: var(--lab);
  color: #fff;
  border-radius: 28px;
  padding: 32px;
}
.recap h2 { color: var(--gold); }
.recap p { max-width: 60ch; }
.recap a { color: var(--gold); }

.quiz-score {
  font-weight: 800;
  font-size: 1.15rem;
  margin: 8px 0 18px;
}
.quiz-q {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px 20px;
  margin: 0 0 14px;
  box-shadow: 0 10px 24px rgba(18, 58, 70, 0.08);
}
.quiz-q h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}
.choices {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.choices button {
  font-family: inherit;
  font-weight: 800;
  border-radius: 999px;
  border: 2px solid var(--lab);
  background: #fff;
  color: var(--ink);
  padding: 8px 14px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}
.choices button:hover:not(:disabled) {
  background: var(--gold);
  transform: translateY(-1px);
}
.choices button:disabled { cursor: default; }
.choices button.is-right {
  background: var(--mint);
  border-color: #2f6f55;
}
.choices button.is-wrong {
  background: #f1d0c6;
  border-color: var(--bolt);
  opacity: 0.7;
}
.quiz-msg {
  margin: 12px 0 0;
  font-weight: 800;
}
.quiz-actions { margin: 18px 0 0; }
.quiz-reset {
  font-family: "Fredoka", sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  border: 0;
  border-radius: 999px;
  background: var(--bolt);
  color: #fff;
  padding: 10px 20px;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.quiz-reset:hover { filter: brightness(1.08); }

footer.site {
  padding: 28px 0 48px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

@media (max-width: 800px) {
  .hero-grid, .two, .videos, .facts { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; }
  .portrait img, .photo img { height: 220px; }
}