body {
    margin: 0;
    padding: 0;
    font-family: "Inter", system-ui, sans-serif;
    background: linear-gradient(135deg, #111827, #1f2937);
    color: white;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.center-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.login-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(16px);
    padding: 40px;
    border-radius: 20px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
    animation: fadeIn 0.4s ease;
}

.title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
}

.subtitle {
    font-size: 15px;
    opacity: 0.8;
    margin-bottom: 30px;
    text-align: center;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    font-size: 14px;
    opacity: 0.85;
}

.input-group input {
    margin-top: 6px;
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: white;
    font-size: 15px;
    outline: none;
    transition: 0.2s;
}

.input-group input:focus {
    background: rgba(255,255,255,0.2);
    box-shadow: 0 0 0 2px #3b82f6;
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: #3b82f6;
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
    margin-top: 10px;
}

.login-btn:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.error-message {
  background-color: #fee2e2;
  color: #b91c1c;
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 16px;
  font-size: 14px;
  border: 1px solid #fecaca;
}