body {
    font-family: sans-serif;
    margin: 0;
    background: radial-gradient(ellipse at bottom, #1d3a5c 0%, #102a4c 100%);
    color: #fff;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.auth-container {
    position: relative; /* This is needed for the back button */
    width: 100%;
    max-width: 450px;
    padding: 2.5rem;
    background-color: rgba(0, 0, 0, 0.6);
    border: 1px solid #00aaff;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 170, 255, 0.5);
    text-align: center;
    padding-top: 4rem; /* Add padding to make space for the button */
}

/* Back Button Styles */
.back-btn {
    position: absolute;
    top: 15px;
    left: 15px;
    padding: 8px 15px;
    background-color: #c0392b; /* Red background */
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.9rem;
    font-weight: bold;
    transition: background-color 0.3s, transform 0.2s;
    box-shadow: 0 0 8px rgba(220, 50, 50, 0.7);
}

.back-btn:hover {
    background-color: #e74c3c; /* Brighter red on hover */
    transform: scale(1.05);
}

.auth-container h1 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: #00ffaa;
    text-shadow: 0 0 8px #00ffaa;
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.auth-form label {
    display: block;
    margin-bottom: 0.5rem;
    color: #ccc;
    font-weight: bold;
}

.auth-form input {
    width: 100%;
    padding: 0.8rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid #555;
    border-radius: 5px;
    color: #fff;
    font-size: 1rem;
    box-sizing: border-box; /* Ensures padding doesn't affect width */
}

.auth-form input:focus {
    outline: none;
    border-color: #00aaff;
    box-shadow: 0 0 8px rgba(0, 170, 255, 0.7);
}

.auth-form .terms {
    font-size: 0.8rem;
    color: #aaa;
    text-align: left;
    margin-top: 1rem;
}
.auth-form .terms a {
    color: #00aaff;
    text-decoration: none;
}
.auth-form .terms a:hover {
    text-decoration: underline;
}

.submit-btn {
    width: 100%;
    padding: 0.8rem 2rem;
    font-size: 1.2rem;
    font-weight: bold;
    color: gold;
    background: linear-gradient(145deg, #2a2a2a, #4b4b4b);
    text-decoration: none;
    border: 1px solid gold;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s, background 0.3s;
    box-shadow: 0 0 8px rgba(255, 215, 0, 0.7);
    margin-top: 1rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    background: linear-gradient(145deg, #3c3c3c, #5a5a5a);
    box-shadow: 0 0 15px rgba(255, 215, 0, 1);
}
.submit-btn:disabled {
    background: #555;
    cursor: not-allowed;
    color: #888;
    border-color: #888;
    box-shadow: none;
    transform: none;
}

.auth-switch {
    margin-top: 2rem;
    color: #ccc;
}

.auth-switch a {
    color: #00aaff;
    font-weight: bold;
    text-decoration: none;
}
.auth-switch a:hover {
    text-decoration: underline;
}