body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: #1f2a3f;
  background:
    radial-gradient(circle at top, rgba(60, 95, 160, 0.16), transparent 38%),
    linear-gradient(160deg, #eef3fb 0%, #dfe8f5 55%, #edf2f8 100%);
}

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

.login-card {
  width: min(100%, 440px);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(33, 47, 74, 0.08);
  box-shadow: 0 24px 80px rgba(25, 42, 68, 0.18);
  border-radius: 22px;
  padding: 28px;
  box-sizing: border-box;
  backdrop-filter: blur(8px);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.login-mark {
  width: 68px;
  height: 68px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #1d2d4c, #355b9b);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: 0 12px 30px rgba(29, 45, 76, 0.25);
}

.login-brand h1 {
  margin: 0;
  font-size: 24px;
}

.login-brand p {
  margin: 4px 0 0;
  color: #6b7d98;
}

.login-copy {
  color: #5e6f89;
  line-height: 1.5;
  margin-bottom: 18px;
}

.login-error {
  background: #fde8ec;
  color: #b2243d;
  border: 1px solid #f4b9c6;
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 16px;
  font-weight: 700;
}

.login-form {
  display: grid;
  gap: 10px;
}

.login-form label {
  font-size: 13px;
  font-weight: 700;
  color: #40506b;
  margin-top: 4px;
}

.login-form input {
  appearance: none;
  border: 1px solid #cdd7e6;
  background: #fff;
  color: #1f2a3f;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.login-form input:focus {
  border-color: #355b9b;
  box-shadow: 0 0 0 4px rgba(53, 91, 155, 0.12);
}

.login-form button {
  margin-top: 10px;
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  background: linear-gradient(135deg, #1d2d4c, #2b4d83);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 14px 30px rgba(29, 45, 76, 0.18);
}

.login-form button:hover {
  filter: brightness(1.05);
}

@media (max-width: 520px) {
  .login-card {
    padding: 22px;
    border-radius: 18px;
  }

  .login-mark {
    width: 58px;
    height: 58px;
    border-radius: 16px;
  }

  .login-brand h1 {
    font-size: 21px;
  }
}