* { box-sizing: border-box; }
html { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
body {
  margin: 0;
  min-height: 100vh;
  background: #f5f6f8;
  color: #17191d;
}
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: min(100%, 420px);
  background: white;
  border: 1px solid #dfe3e8;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.08);
}
.eyebrow {
  display: block;
  margin-bottom: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #5e6470;
}
h1 { margin: 0 0 8px; font-size: 1.7rem; }
p { color: #5e6470; line-height: 1.5; }
form { display: grid; gap: 16px; margin-top: 24px; }
label { display: grid; gap: 6px; font-weight: 600; }
input {
  width: 100%;
  border: 1px solid #b9c0ca;
  border-radius: 10px;
  padding: 12px;
  font: inherit;
}
input:focus { outline: 3px solid rgba(49, 91, 211, 0.2); border-color: #315bd3; }
button {
  border: 0;
  border-radius: 10px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  background: #17191d;
  color: white;
}
button:disabled { cursor: wait; opacity: 0.65; }
.feedback {
  margin: 16px 0 0;
  color: #a32626;
  font-weight: 600;
}