:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  --bg: #f3f5f7;
  --surface: #fff;
  --line: #d8dde3;
  --text: #20242a;
  --muted: #69727e;
  --blue: #1769e0;
  --red: #b42318;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 14px; letter-spacing: 0; }

.login-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
  min-height: 100svh;
  padding: 24px;
  background: linear-gradient(135deg, #f8f9fb 0 48%, #eef2f5 48% 100%);
}

.login-panel {
  width: min(400px, 100%);
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 55px rgba(23, 32, 43, .1);
}

.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 28px; border-radius: 7px; background: #1d242c; color: #fff; font-weight: 800; }
.eyebrow { margin: 0 0 6px; color: var(--muted); font-size: 10px; font-weight: 800; text-transform: uppercase; }
h1 { margin: 0 0 25px; font-size: 23px; line-height: 1.25; letter-spacing: 0; }
form { display: grid; gap: 16px; }
label { display: grid; gap: 7px; }
label span { color: #4c5560; font-size: 12px; font-weight: 700; }
input { width: 100%; height: 44px; border: 1px solid #bcc4ce; border-radius: 6px; outline: 0; padding: 0 12px; color: var(--text); font: inherit; letter-spacing: 0; }
input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(23, 105, 224, .12); }
button { height: 44px; border: 0; border-radius: 6px; background: var(--blue); color: #fff; font: inherit; font-weight: 800; letter-spacing: 0; cursor: pointer; }
button:hover { background: #0e54bc; }
.feedback { min-height: 18px; margin: -3px 0 -2px; color: var(--muted); font-size: 12px; }
.feedback.error { color: var(--red); }
.security { display: flex; align-items: center; gap: 7px; margin: 24px 0 0; padding-top: 18px; border-top: 1px solid #e4e7eb; color: var(--muted); font-size: 11px; }
.security i { width: 7px; height: 7px; border-radius: 50%; background: #2ca46d; box-shadow: 0 0 0 4px #e3f5ec; }

@media (max-width: 480px) {
  .login-shell { align-items: end; padding: 14px; }
  .login-panel { padding: 26px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}