/* Environment landing page (/auth/signin), served before sign-in. */
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: #08111c; color: #eaf1fa; line-height: 1.5;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif; }
.top { max-width: 1040px; margin: 0 auto; padding: 20px 16px; font-weight: 750; font-size: 17px; }
.mark { color: #4388fb; }
.landing { max-width: 1040px; margin: 0 auto; padding: 32px 16px 48px; display: grid; gap: 32px;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 1fr); align-items: start; }
@media (max-width: 760px) { .landing { grid-template-columns: 1fr; } }
.intro h1 { margin: 12px 0 16px; font-size: clamp(28px, 5vw, 40px); line-height: 1.15; letter-spacing: -.02em; }
.intro p { margin: 0; color: #a6bdce; font-size: 17px; }
.badge { display: inline-block; font-size: 11px; font-weight: 750; letter-spacing: .06em; padding: 4px 8px; border-radius: 6px; text-transform: uppercase; }
.badge.dev { background: #1f3a2a; color: #7ee0a1; }
.badge.test { background: #1f2f3a; color: #7ec8e0; }
.badge.prod { background: #3a2a1f; color: #f2b277; }
.signin { display: grid; gap: 12px; padding: 28px; background: #0f1b2a; border: 1px solid #263b52; border-radius: 14px; }
.signin h2 { margin: 0; font-size: 20px; }
.signin p { margin: 0 0 4px; color: #a6bdce; font-size: 14px; }
.signin a { display: block; text-align: center; padding: 12px 16px; border-radius: 9px; text-decoration: none; font-size: 14px; font-weight: 650; }
.signin .primary { background: #286ce3; color: #fff; border: 1px solid #4388fb; }
.signin .primary:hover { background: #3781f4; }
.signin .quiet { color: #83b9ff; padding: 6px; font-weight: 600; }