:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #111216;
  color: #f7f7fa;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; min-height: 100vh; background: radial-gradient(ellipse at 50% -20%, #292633 0, #111216 58%); }
.shell { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 28px; }
.brand { text-align: center; padding: 24px 20px 30px; }
.robot { display: block; width: clamp(112px, 22vw, 180px); height: clamp(112px, 22vw, 180px); object-fit: contain; margin: 0 auto 12px; }
.eyebrow { margin: 0 0 5px; color: #9ba0ae; font-size: .82rem; letter-spacing: .12em; }
h1 { margin: 0; font-size: clamp(2.8rem, 8vw, 4.4rem); line-height: 1; letter-spacing: -.045em; }
.subtitle { margin: 14px 0 0; color: #d2d2da; font-size: clamp(1.05rem, 3.3vw, 1.4rem); }
.tagline { margin: 20px 0 0; color: #fff; font-weight: 700; font-size: clamp(1.35rem, 4.5vw, 2rem); letter-spacing: .08em; }
.intro { margin: 18px 0 22px; text-align: center; }
.intro h2 { margin: 0 0 10px; font-size: clamp(1.2rem, 4vw, 1.55rem); }
.intro p { margin: 0 auto; max-width: 590px; color: #b9bbc5; line-height: 1.8; }
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.choice { position: relative; display: flex; min-height: 166px; flex-direction: column; justify-content: center; gap: 10px; padding: 22px 48px 22px 22px; border: 1px solid #41414d; border-radius: 16px; color: inherit; text-decoration: none; background: #1b1b23; transition: border-color .15s ease, transform .15s ease, background .15s ease; }
.choice:hover, .choice:focus-visible { border-color: #a66aff; background: #211c2b; transform: translateY(-2px); outline: none; }
.choice-label { color: #aeb0bc; font-size: .9rem; }
.choice strong { font-size: 1.3rem; }
.choice > span:not(.choice-label):not(.arrow) { color: #c2c3cc; font-size: .92rem; line-height: 1.5; }
.choice-trial { border-color: #485c87; }
.arrow { position: absolute; right: 20px; top: calc(50% - 14px); color: #c69aff; font-size: 1.6rem; }
.note { margin: 22px 3px 0; color: #9295a2; font-size: .88rem; line-height: 1.75; text-align: center; }
footer { margin-top: 32px; color: #777a86; font-size: .78rem; text-align: center; }
@media (max-width: 560px) { .shell { padding-top: 24px; } .brand { padding: 14px 4px 20px; } .choices { grid-template-columns: 1fr; gap: 10px; } .choice { min-height: 132px; } .intro { margin-top: 8px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; } }