:root {
  color-scheme: light;
  font-family: Arial, Helvetica, ui-sans-serif, system-ui, sans-serif;
  background: #1d1d1d;
  color: #262626;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(227, 6, 19, .34), transparent 24rem),
    radial-gradient(circle at 92% 88%, rgba(227, 6, 19, .13), transparent 28rem),
    linear-gradient(145deg, #121212, #292929);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 430px);
  padding: 38px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-top: 5px solid #e30613;
  border-radius: 7px;
  background: rgba(255, 255, 255, .98);
  box-shadow: 0 25px 75px rgba(0, 0, 0, .32);
}

.brand-logo {
  display: block;
  width: 225px;
  height: 92px;
  margin: -23px 0 -20px -28px;
  object-fit: contain;
}

.brand-rule {
  width: 42px;
  height: 3px;
  margin-top: 20px;
  background: #e30613;
}

.eyebrow {
  margin: 15px 0 8px;
  color: #bd0010;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .14em;
}

h1 {
  margin: 0;
  color: #222;
  font-size: 30px;
  line-height: 1.15;
}

.intro {
  margin: 13px 0 26px;
  color: #696969;
  line-height: 1.55;
}

form { display: grid; gap: 9px; }

label {
  margin-top: 9px;
  font-size: 13px;
  font-weight: 750;
}

input {
  width: 100%;
  min-height: 46px;
  border: 1px solid #c9c9c9;
  border-radius: 4px;
  padding: 10px 12px;
  background: #fafafa;
  color: #222;
  font: inherit;
}

input:focus {
  outline: 3px solid rgba(227, 6, 19, .14);
  border-color: #e30613;
}

button {
  min-height: 48px;
  margin-top: 18px;
  border: 0;
  border-radius: 4px;
  background: #e30613;
  color: white;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

button:hover { background: #bd0010; }

.error {
  margin: -8px 0 14px;
  padding: 11px 13px;
  border-left: 4px solid #f05252;
  background: #fff0f0;
  color: #9a2929;
  font-size: 13px;
}

small {
  display: block;
  margin-top: 24px;
  color: #777;
  text-align: center;
}

@media (max-width: 520px) {
  .login-shell { padding: 12px; }
  .login-card { padding: 28px 22px; }
}