.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.auth-modal {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    max-width: 400px;
    width: 90%;
    text-align: center;
}

.auth-logo {
    width: 80px;
    height: 60px;
    margin: 0 auto 1.5rem;
    background: #2c3e50;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.auth-title {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.auth-subtitle {
    color: #7f8c8d;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.auth-input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 1.5rem;
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

.auth-input:focus {
    outline: none;
    border-color: #3498db;
}

.auth-button {
    width: 100%;
    padding: 1rem;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.auth-button:hover {
    background: #2980b9;
}

.auth-button:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
}

.auth-error {
    color: #e74c3c;
    margin-top: 1rem;
    font-size: 0.9rem;
    padding: 0.75rem;
    background: #fdf2f2;
    border-radius: 6px;
    border-left: 4px solid #e74c3c;
}

.auth-success {
    color: #27ae60;
    margin-top: 1rem;
    font-size: 0.9rem;
    padding: 0.75rem;
    background: #f2fdf2;
    border-radius: 6px;
    border-left: 4px solid #27ae60;
}