body {
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #0b1220, #0e1628);
  color: #e6e6e6;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 460px;
  margin: 80px auto;
  padding: 28px 28px 24px;
  background: #121a2a;
  border-radius: 14px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.6);
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

.header h2 {
  margin: 0;
  font-size: 22px;
}

.header .subtitle {
  margin-top: 6px;
  font-size: 14px;
  color: #9fb0d9;
  line-height: 1.4;
}

.form-group {
  margin-top: 16px;
}

label {
  display: block;
  font-size: 14px;
  margin-bottom: 6px;
}

label small {
  color: #9fb0d9;
  font-size: 12px;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #1f2a44;
  background: #0f172a;
  color: #e6e6e6;
  font-size: 14px;
}

input:focus {
  outline: none;
  border-color: #3b82f6;
}

.hint {
  font-size: 12px;
  color: #9fb0d9;
  line-height: 1.5;
  margin-top: 6px;
}

button {
  margin-top: 22px;
  padding: 12px;
  width: 100%;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  cursor: pointer;
}

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

.error {
  color: #ef4444;
  margin-top: 14px;
  text-align: center;
  font-size: 14px;
}

.footer {
  margin-top: 22px;
  text-align: center;
  font-size: 13px;
  color: #9fb0d9;
  line-height: 1.5;
}

.footer-en {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  opacity: 0.65;
}