body, html {
    height: 100%;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0f172a;
}

.login-bg {
    /* 50% transparent background image related to buildings/cityscape */
    background:
        linear-gradient(rgba(15, 23, 42, 0.55), rgba(15, 23, 42, 0.55)),
        url('/images/flat-bg.jpg') no-repeat center center fixed;
    background-size: cover;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
}

.login-container {
    background: rgba(255, 255, 255, 0.90);
    padding: 2.2rem 2rem;
    border-radius: 18px;
    border: 1px solid rgba(15, 23, 42, 0.10);
    box-shadow: 0 18px 60px rgba(15, 23, 42, 0.25);
    max-width: 420px;
    width: 100%;
    text-align: left;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.login-container h2 {
    margin: 0;
    color: #0f172a;
}

.form-group {
    margin-bottom: 1rem;
}

input[type="text"], input[type="password"] {
    width: 100%;
    padding: 0.8rem 0.9rem;
    border: 1px solid rgba(15, 23, 42, 0.16);
    border-radius: 12px;
    font-size: 1rem;
    background: rgba(249, 250, 252, 0.95);
}

input[type="text"]:focus, input[type="password"]:focus {
    outline: none;
    border-color: rgba(34, 48, 74, 0.45);
    box-shadow: 0 0 0 4px rgba(34, 48, 74, 0.18);
}