body {
  min-height: 100vh;
  background: radial-gradient(circle at 8% 0%, #e5f0ff 0%, #f4f7fb 48%);
}

.login-shell {
  width: min(1040px, 94vw);
  margin: 3rem auto;
  display: grid;
  grid-template-columns: 1fr 430px;
  border: 1px solid #d7e2f5;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 30px 54px rgba(13, 36, 78, 0.12);
}

.login-visual {
  padding: 2rem;
  background: linear-gradient(145deg, #103164, #1d4ea1);
  color: #dce9ff;
  position: relative;
}

.login-visual::after {
  content: "";
  position: absolute;
  inset: auto -90px -90px auto;
  width: 240px;
  height: 240px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(131, 201, 255, 0.5), rgba(14, 45, 94, 0));
}

.login-visual .logo {
  color: #ffffff;
}

.login-visual h1 {
  margin-top: 1.4rem;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.1;
}

.login-visual p {
  margin-top: 0.9rem;
  max-width: 44ch;
  color: #bad2ff;
}

.login-visual ul {
  margin: 1.2rem 0 0;
  padding-left: 1.2rem;
  color: #e4eeff;
}

.login-visual li {
  margin: 0.45rem 0;
}

.login-card {
  padding: 2rem;
  background: #ffffff;
}

.login-card h2 {
  font-size: 1.4rem;
}

.login-card > p {
  margin-top: 0.5rem;
  color: #5e6f88;
}

#googleSignInBtn {
  width: 100%;
  margin-top: 1.3rem;
}

.divider {
  margin: 1rem 0 0.8rem;
  position: relative;
  text-align: center;
}

.divider::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  border-top: 1px solid #d9e3f4;
}

.divider span {
  position: relative;
  z-index: 1;
  padding: 0 0.6rem;
  background: #ffffff;
  color: #60728d;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}

.auth-tabs {
  display: inline-flex;
  width: 100%;
  margin-bottom: 0.75rem;
  border-radius: 12px;
  background: #eef4ff;
  border: 1px solid #d8e3f6;
  padding: 0.2rem;
}

.auth-tab {
  flex: 1;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #4c6387;
  font-weight: 700;
  padding: 0.5rem 0.6rem;
  cursor: pointer;
}

.auth-tab.active {
  background: #ffffff;
  color: #1b3e74;
  box-shadow: 0 6px 12px rgba(13, 38, 81, 0.1);
}

.auth-form {
  display: grid;
  gap: 0.48rem;
}

.auth-form + .auth-form {
  margin-top: 0.7rem;
}

.auth-form .btn {
  margin-top: 0.3rem;
}

.dev-login {
  margin-top: 1.15rem;
  border: 1px solid #d6e2f5;
  border-radius: 14px;
  background: #f6f9ff;
  padding: 0.85rem;
}

.dev-login form {
  margin-top: 0.5rem;
  display: grid;
  gap: 0.5rem;
}

.dev-login .btn {
  margin-top: 0.35rem;
}

.subtle {
  margin-top: 1rem;
}

@media (max-width: 920px) {
  .login-shell {
    grid-template-columns: 1fr;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
  }
}