body {
  background-color: #1a1a2e;
  font-family: system-ui, -apple-system, sans-serif;
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-box {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  width: 100%;
  max-width: 360px;
}
.login-box h1 {
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  text-align: center;
}
.login-box p {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  margin-bottom: 24px;
  text-align: center;
}
.login-box label {
  display: block;
  color: rgba(255,255,255,0.9);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.login-box input {
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: background 0.2s;
  margin-bottom: 20px;
}
.login-box input::placeholder {
  color: rgba(255,255,255,0.4);
}
.login-box input:focus {
  background: rgba(255,255,255,0.25);
}
.login-box button {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: #1a1a2e;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  letter-spacing: 0.3px;
}
.login-box button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}
.error {
  background: rgba(255,80,80,0.2);
  color: #ff6b6b;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  text-align: center;
  margin-bottom: 16px;
}