.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
    overflow-y: auto;
}

.auth-modal {
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 450px;
    overflow: hidden;
    position: relative;
    margin: auto;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #777;
    z-index: 1;
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid #eee;
}

.auth-tab {
    flex: 1;
    text-align: center;
    padding: 1rem;
    background: #f8f9fa;
    font-weight: 600;
    border: none;
    cursor: pointer;
}

.auth-tab.active {
    background: white;
    color: var(--secondary);
    border-bottom: 3px solid var(--secondary);
}

.auth-form {
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    box-sizing: border-box;
}

.form-text {
    color: #6c757d;
    font-size: 12px;
    margin-top: 5px;
}

body.modal-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .modal-overlay {
        padding: 10px;
        align-items: flex-start;
        padding-top: 20px;
    }

    .auth-modal {
        max-width: 100%;
        margin: 0;
        border-radius: 8px;
    }

    .auth-form {
        padding: 1.5rem;
    }

    .auth-tabs {
        flex-direction: column;
    }

    .auth-tab {
        padding: 0.75rem;
    }

    .close-btn {
        top: 10px;
        right: 10px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .auth-form {
        padding: 1rem;
    }

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

    .form-control {
        padding: 10px;
        font-size: 16px;
    }
}