:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
    "Noto Sans KR", "Noto Sans Arabic", sans-serif;
  background: #f5f5f8;
  color: #1c1d24;
}

* { box-sizing: border-box; }

body { margin: 0; min-height: 100vh; }

.shell { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 64px; }

header { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 34px; }

.brand { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 800; }

.mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; background: linear-gradient(145deg, #6f7280, #3f424c); color: white; box-shadow: 0 8px 24px #40434f2e; }

select { border: 1px solid #d8d8e0; border-radius: 12px; background: #fff; color: #24252c; padding: 10px 32px 10px 12px; font: inherit; }

main { background: #fff; border: 1px solid #e4e4ea; border-radius: 28px; padding: clamp(24px, 6vw, 54px); box-shadow: 0 20px 60px #34374112; }

h1 { margin: 0 0 14px; font-size: clamp(34px, 7vw, 56px); line-height: 1.08; letter-spacing: -0.04em; }
h2 { margin-top: 34px; font-size: 20px; }
p, li { line-height: 1.7; }
.lead { color: #686a76; font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; min-height: 46px; padding: 0 18px; border-radius: 14px; background: #454852; color: white; text-decoration: none; font-weight: 700; }
.button.secondary { background: #eeeff3; color: #31323a; }
.locale[hidden] { display: none; }
footer { color: #777985; font-size: 13px; text-align: center; margin-top: 24px; }

@media (prefers-color-scheme: dark) {
  :root { background: #111216; color: #f3f3f7; }
  main { background: #191a20; border-color: #303139; }
  .lead, footer { color: #b4b5c0; }
  select { background: #22232a; border-color: #3a3b44; color: #f3f3f7; }
  .button.secondary { background: #2b2c34; color: #f3f3f7; }
}