* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px;
  font-family: system-ui, -apple-system, "Segoe UI", Inter, sans-serif; background: #0e1013; color: #e7e9ec; }
.card { width: 100%; max-width: 400px; background: #16191e; border: 1px solid #262a31; border-radius: 12px; padding: 32px; }
h1 { font-size: 22px; font-weight: 600; margin: 0 0 4px; color: #e7e9ec; }
p { margin: 0 0 20px; color: #8d939c; font-size: 14px; }
ol { padding-left: 18px; margin: 0 0 16px; color: #c9cdd3; font-size: 13px; line-height: 1.6; }
label { display: block; font-size: 13px; font-weight: 600; color: #c9cdd3; margin: 16px 0 6px; }
input { width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid #262a31; background: #0e1013; color: #e7e9ec; font-size: 15px; }
input:focus { outline: 2px solid #2563eb; border-color: transparent; }
#code, #enroll-code { letter-spacing: 6px; font-size: 20px; text-align: center; }
button { width: 100%; margin-top: 24px; padding: 13px; border: 0; border-radius: 10px; background: #2563eb; color: #fff;
  font-weight: 600; font-size: 15px; cursor: pointer; }
button:disabled { opacity: .6; cursor: wait; }
#qr { display: block; margin: 8px auto 12px; background: #fff; padding: 8px; border-radius: 10px; }
details { font-size: 13px; color: #8d939c; }
code { display: block; margin-top: 6px; padding: 8px; background: #1e2128; border-radius: 8px; color: #e7e9ec; word-break: break-all; letter-spacing: 2px; }
.error { margin-top: 16px; color: #f87171; font-size: 14px; min-height: 20px; }

/* App instalado no iPhone */
body { padding-top: max(16px, env(safe-area-inset-top)); padding-bottom: max(16px, env(safe-area-inset-bottom)); }