body {
  background-color: #0f172a;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: #e2e8f0; 
}

.login-container {
  background: #1e293b; 
  padding: 40px 50px;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
  width: 400px;
  max-width: 90%;
  text-align: center;
}

.login-container h1 {
  margin-bottom: 24px;
  font-weight: 700;
  font-size: 2rem;
  color: #f8fafc;
}

form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

input[type="email"],
input[type="text"],
input[type="password"] {
  padding: 14px 16px;
  border: 1.5px solid #334155;
  border-radius: 8px;
  font-size: 1rem;
  background-color: #0f172a;
  color: #f1f5f9;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input[type="email"]:focus,
input[type="text"]:focus,
input[type="password"]:focus {
  border-color: #60a5fa;
  outline: none;
  box-shadow: 0 0 8px rgba(96, 165, 250, 0.4);
}

button[type="submit"] {
  padding: 14px 16px;
  background-color: #3b82f6; 
  color: white;
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.25s ease;
}

button[type="submit"]:hover {
  background-color: #2563eb; 
}

button[type="submit"]:active {
  background-color: #1d4ed8; 
}

input::placeholder {
  color: #94a3b8; 
  font-weight: 400;
}

.flash-container {
  margin-bottom: 20px;
  text-align: left;
}

.flash-message {
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 1.4rem;
  margin-bottom: 10px;
  text-align: center;
}

.flash-message.error {
  background-color: #2d3d57;
  color: #ee0606;
  border-radius: 5px;
}

.flash-message.success {
  background-color: #2d3d57;
  color: #1b6e3f;
  border-radius: 5px;
}