:root {
  color-scheme: light;
  font-family: Inter, Aptos, "Segoe UI", sans-serif;
  color: #163330;
  background: #eef4f3;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at top, #dbeceb, #eef4f3 42%, #f7f9f8); }
.shell { min-height: 100vh; display: grid; place-content: center; gap: 18px; padding: 28px 16px; }
.card { width: min(440px, calc(100vw - 32px)); padding: 38px; background: #fff; border: 1px solid #d5e2e0; border-radius: 24px; box-shadow: 0 24px 80px rgba(10, 65, 60, .13); }
.brand { display: flex; align-items: center; gap: 10px; color: #075b58; font-weight: 800; letter-spacing: .13em; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 12px; color: #fff; background: #0c7771; letter-spacing: 0; }
.eyebrow { margin: 34px 0 8px; color: #0c7771; font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
h1 { margin: 0; color: #102c2a; font-size: clamp(28px, 7vw, 38px); line-height: 1.08; }
.lead { margin: 14px 0 26px; color: #5b716f; line-height: 1.55; }
form { display: grid; gap: 9px; }
label { margin-top: 8px; color: #294744; font-size: 14px; font-weight: 700; }
input { width: 100%; min-height: 48px; padding: 11px 13px; border: 1px solid #bdcfcc; border-radius: 12px; color: #163330; background: #fbfdfc; font: inherit; }
input:focus { outline: 3px solid rgba(12, 119, 113, .16); border-color: #0c7771; }
button { min-height: 50px; margin-top: 16px; border: 0; border-radius: 13px; color: #fff; background: #0c7771; font: inherit; font-weight: 800; cursor: pointer; }
button:hover { background: #075b58; }
.validation { color: #a03030; font-size: 13px; line-height: 1.4; }
.validation:empty { display: none; }
.notice, .setup-callout { margin: 18px 0; padding: 14px 16px; border-radius: 14px; background: #e8f5f2; color: #185d58; line-height: 1.45; }
.setup-callout { display: grid; gap: 5px; margin-top: 26px; background: #f1f5f4; color: #526966; }
.setup-callout a { margin-top: 5px; color: #0c7771; font-weight: 800; }
.prototype-note { margin: 0; color: #6a7c7a; text-align: center; font-size: 12px; }
@media (max-width: 480px) { .card { padding: 28px 22px; border-radius: 20px; } }