:root {
  color-scheme: light;
  font-family: Inter, Aptos, "Segoe UI", sans-serif;
  color: #17211b;
  background: #f5f7f2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
}

.page-shell {
  width: min(100% - 32px, 940px);
  margin: 0 auto;
  padding: clamp(48px, 10vw, 104px) 0;
}

.intro { max-width: 650px; }

.eyebrow,
.class,
.subject {
  display: block;
  font-size: .82rem;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.eyebrow { color: #347244; margin: 0 0 12px; }

h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 18px;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.05;
  letter-spacing: -.045em;
}

.intro > p:last-child {
  color: #506057;
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.65;
}

.quiz-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 42px;
}

.quiz-card {
  display: flex;
  min-height: 275px;
  flex-direction: column;
  padding: 30px;
  border: 1px solid #d5ddd2;
  border-radius: 22px;
  color: inherit;
  text-decoration: none;
  box-shadow: 0 5px 18px rgb(30 52 34 / 6%);
  transition: transform .16s ease, box-shadow .16s ease;
}

.biology { background: #e6f3df; }
.geography { background: #dfeff2; }
.class { color: #536158; }
.subject { margin-top: 6px; color: #347244; }
.geography .subject { color: #166777; }

h2 {
  margin: 24px 0 10px;
  font-size: 1.7rem;
  letter-spacing: -.025em;
}

.quiz-card p { color: #45574e; line-height: 1.55; }

.start {
  margin-top: auto;
  padding-top: 20px;
  font-weight: 750;
}

.quiz-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgb(30 52 34 / 13%); }
.quiz-card:focus-visible { outline: 4px solid #17211b; outline-offset: 3px; }

@media (max-width: 640px) {
  .quiz-list { grid-template-columns: 1fr; }
  .quiz-card { min-height: 230px; }
}