:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #222;
  background: #f4f1ec;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 15% 15%, rgba(255,255,255,.9), transparent 34%),
    linear-gradient(135deg, #f7f4ef 0%, #ebe4db 100%);
}
.login-card {
  width: min(100%, 420px);
  padding: 42px 38px 38px;
  border-radius: 22px;
  background: rgba(255,255,255,.94);
  box-shadow: 0 24px 70px rgba(43,36,28,.13);
  border: 1px solid rgba(70,56,43,.08);
}
.brand-mark {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  margin-bottom: 26px;
  border-radius: 50%;
  background: #25211d;
  color: #fff;
  font-family: Georgia, serif;
  font-size: 16px;
  letter-spacing: .08em;
}
.eyebrow {
  margin: 0 0 7px;
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: 11px;
  font-weight: 700;
  color: #83776b;
}
h1 { margin: 0; font-family: Georgia, serif; font-size: clamp(30px, 7vw, 42px); font-weight: 500; }
.intro { margin: 12px 0 30px; color: #756b62; line-height: 1.5; }
label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 700; }
input {
  width: 100%;
  height: 50px;
  border: 1px solid #d7cec5;
  border-radius: 12px;
  padding: 0 14px;
  font: inherit;
  background: #fff;
  outline: none;
}
input:focus { border-color: #675b50; box-shadow: 0 0 0 3px rgba(103,91,80,.1); }
button {
  width: 100%;
  height: 50px;
  margin-top: 16px;
  border: 0;
  border-radius: 12px;
  background: #25211d;
  color: #fff;
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}
button:disabled { opacity: .55; cursor: wait; }
.message { min-height: 22px; margin: 14px 0 0; font-size: 13px; color: #a03131; }
@media (max-width: 520px) {
  .login-shell { padding: 14px; }
  .login-card { padding: 34px 24px 28px; border-radius: 18px; }
}