* { box-sizing: border-box; }
:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #080d18;
  color: #e8eefb;
}
body { margin: 0; min-height: 100vh; background: #080d18; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-panel { width: min(100%, 420px); padding: 42px 38px 34px; border: 1px solid #22314a; border-radius: 10px; background: #101827; box-shadow: 0 24px 70px rgba(0,0,0,.38); }
.brand-mark { width: 52px; height: 52px; display: grid; place-items: center; margin-bottom: 22px; border: 1px solid #2f8cff; border-radius: 12px; background: #102a52; color: #6bb2ff; font-size: 26px; font-weight: 800; }
.eyebrow { margin: 0 0 8px; color: #64a9ff; font-size: 12px; font-weight: 700; letter-spacing: 1.4px; }
h1 { margin: 0; color: #f5f8ff; font-size: 28px; line-height: 1.2; }
.subheading { margin: 10px 0 28px; color: #91a0b8; font-size: 14px; }
form { display: grid; gap: 10px; }
label { margin-top: 4px; color: #c3cee0; font-size: 13px; font-weight: 600; }
input { width: 100%; height: 46px; padding: 0 13px; border: 1px solid #2a3a55; border-radius: 7px; outline: none; background: #0a1220; color: #f1f5ff; font: inherit; }
input:focus { border-color: #4198ff; box-shadow: 0 0 0 3px rgba(65,152,255,.16); }
button { height: 46px; margin-top: 10px; border: 0; border-radius: 7px; background: #2d7ff0; color: white; font: inherit; font-weight: 700; cursor: pointer; }
button:hover { background: #4392ff; }
button:disabled { opacity: .65; cursor: wait; }
.error { margin: 4px 0 0; padding: 10px 12px; border: 1px solid #713649; border-radius: 6px; background: #321826; color: #ff9eb5; font-size: 13px; }
.security-note { margin: 24px 0 0; color: #74849f; font-size: 12px; line-height: 1.6; }
@media (max-width: 480px) { .login-panel { padding: 32px 24px 28px; } }