.guest-page { background: #0e1522; }
.guest-shell { display: grid; min-height: 100vh; grid-template-columns: minmax(360px, 1.08fr) minmax(440px, .92fr); }
.brand-panel { position: relative; display: flex; flex-direction: column; justify-content: space-between; overflow: hidden; padding: clamp(38px, 6vw, 84px); color: #fff; background: radial-gradient(circle at 20% 20%, rgba(119, 120, 245, .35), transparent 36%), radial-gradient(circle at 88% 76%, rgba(65, 178, 188, .18), transparent 30%), linear-gradient(145deg, #171d31 0%, #0f1522 75%); }
.brand-panel::after { position: absolute; right: -120px; bottom: -170px; width: 420px; height: 420px; border: 1px solid rgba(255,255,255,.08); border-radius: 50%; box-shadow: 0 0 0 60px rgba(255,255,255,.02), 0 0 0 120px rgba(255,255,255,.015); content: ""; }
.brand-panel .brand-mark { position: relative; z-index: 1; }
.brand-panel .brand-mark small { color: rgba(255,255,255,.55); }
.brand-copy { position: relative; z-index: 1; max-width: 620px; margin: auto 0; padding: 80px 0; }
.brand-copy h1 { margin-bottom: 24px; font-size: clamp(46px, 5.7vw, 82px); line-height: .98; }
.brand-copy p { max-width: 570px; margin: 0; color: rgba(255,255,255,.65); font-size: clamp(17px, 1.5vw, 21px); line-height: 1.7; }
.brand-panel .eyebrow { color: #a9aafc; }
.feature-list { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 12px 24px; margin: 0; padding: 0; color: rgba(255,255,255,.6); list-style: none; font-size: 13px; }
.feature-list li::before { margin-right: 8px; color: #8ce0c3; content: "✓"; }
.security-note { position: relative; z-index: 1; display: flex; align-items: center; gap: 9px; color: rgba(255,255,255,.55); font-size: 13px; }
.security-note span { display: grid; width: 24px; height: 24px; place-items: center; color: #8ce0c3; background: rgba(140,224,195,.09); border-radius: 8px; }
.guest-card { display: flex; width: min(100%, 620px); min-height: 100vh; flex-direction: column; justify-content: center; padding: clamp(42px, 7vw, 96px); background: var(--surface); }
.guest-card h2 { margin-bottom: 10px; font-size: clamp(30px, 3vw, 42px); letter-spacing: -.04em; }
.guest-card > .muted { margin-bottom: 26px; }
.login-card { width: 100%; max-width: none; }
.login-card form { max-width: 440px; }
.installer-card { width: 100%; max-width: none; justify-content: flex-start; overflow: auto; }
.installer-card > * { width: min(100%, 560px); margin-left: auto; margin-right: auto; }
.step-label { margin-bottom: 18px; color: var(--primary); font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.fine-print { margin-top: 18px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.mobile-brand { display: none; margin-bottom: 44px; }
.guest-footer { display: flex; gap: 10px; margin-top: 36px; color: var(--muted); font-size: 12px; }
.system-page { min-height: 100vh; padding: 28px; }
.system-header { display: flex; max-width: 960px; align-items: center; justify-content: space-between; margin: 0 auto 24px; }
.system-card { max-width: 960px; margin: 0 auto; padding: 40px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.requirements.large .requirement-row { padding: 14px 16px; }

@media (max-width: 900px) {
  .guest-shell { grid-template-columns: 1fr; background: var(--surface); }
  .brand-panel { display: none; }
  .guest-card { width: 100%; min-height: 100vh; padding: 34px 24px; }
  .login-card { justify-content: center; }
  .mobile-brand { display: inline-flex; }
}

@media (max-width: 520px) {
  .form-grid { grid-template-columns: 1fr; }
  .system-page { padding: 14px; }
  .system-card { padding: 24px; }
}