:root {
  --paper: #f3efe5;
  --ink: #172027;
  --muted: #59636b;
  --navy: #18394a;
  --rust: #b74b2d;
  --white: #fffdf8;
  --serif: "Newsreader", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

.landing {
  width: min(980px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(52px, 10vh, 110px) 0;
}

.landing-header { margin-bottom: 34px; }

.landing-header p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.landing-header h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
}

.model-choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.model-choice {
  display: grid;
  min-height: 260px;
  grid-template-columns: 1fr auto;
  align-content: end;
  gap: 10px 24px;
  padding: clamp(26px, 5vw, 46px);
  border: 1px solid var(--ink);
  color: var(--ink);
  background: var(--white);
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.model-choice--afl { border-top: 7px solid var(--navy); }
.model-choice--books { border-top: 7px solid var(--rust); }

.model-choice:hover {
  box-shadow: 8px 8px 0 rgba(23, 32, 39, 0.14);
  transform: translate(-3px, -3px);
}

.model-choice:focus-visible {
  outline: 4px solid var(--rust);
  outline-offset: 5px;
}

.choice-name {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
}

.choice-description {
  grid-column: 1;
  color: var(--muted);
  font-size: 0.82rem;
}

.choice-arrow {
  grid-row: 1 / 3;
  grid-column: 2;
  align-self: center;
  font-size: 1.6rem;
}

@media (max-width: 700px) {
  .landing { width: min(100% - 32px, 980px); }
  .model-choices { grid-template-columns: 1fr; }
  .model-choice { min-height: 190px; }
}

@media (prefers-reduced-motion: reduce) {
  .model-choice { transition: none; }
}