:root {
  color-scheme: light dark;
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #eef3f9;
  color: #172033;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 15% 10%, rgba(37, 99, 235, 0.16), transparent 35%),
    radial-gradient(circle at 85% 90%, rgba(15, 118, 110, 0.14), transparent 40%),
    #eef3f9;
}

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

.login-card {
  width: min(100%, 430px);
  padding: 44px 40px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.13);
}

.eyebrow {
  margin: 0 0 12px;
  color: #2563eb;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0;
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -0.04em;
  word-break: keep-all;
}

.description {
  margin: 14px 0 28px;
  color: #64748b;
  line-height: 1.65;
}

label {
  display: block;
  margin-bottom: 9px;
  font-weight: 700;
}

input[type="password"] {
  width: 100%;
  height: 50px;
  padding: 0 14px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #fff;
  color: #172033;
  font: inherit;
}

input[type="password"]:focus {
  border-color: #2563eb;
  outline: 3px solid rgba(37, 99, 235, 0.14);
}

.remember {
  margin: 12px 0 22px;
  color: #64748b;
  font-size: 0.86rem;
}

button {
  width: 100%;
  height: 50px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(120deg, #2563eb, #0f766e);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

button:hover {
  filter: brightness(1.05);
}

.message {
  margin: 0 0 20px;
  padding: 11px 13px;
  border-radius: 9px;
  font-size: 0.9rem;
}

.message.error {
  background: #fee2e2;
  color: #991b1b;
}

.message.success {
  background: #dcfce7;
  color: #166534;
}

@media (max-width: 520px) {
  .login-card {
    padding: 34px 24px;
  }
}