*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body{
    width: 100%;
    height: 100%;
}

html{
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto;
    background-color: var(--bg-primary-color);
    color: var(--text-primary-color);
}

main{
    width: 100%;
    height: 100%;
}


section{
    width: 100%;
    padding: var(--padding-2xl);
    display: flex;
    gap: var(--gutter-lg);
    height: 100vh;
    align-items: stretch;
}


main section .left{
    display: flex;
    flex-direction: column;
    gap: var(--gutter-lg);
    width: 70%;
    align-items: center;
    height: 100%;
}


main section .top{
    display: flex;
    align-items: center;
    gap: var(--gutter-md);
}


.btn{
    padding: var(--padding-sm);
    border: none;
    outline: none;
    border-radius: var(--border-radius-md);
    background-color: var(--bg-active-color);
    cursor: pointer;
    color: var(--text-active-color);
    transition: 0.2s ease;
}

.btn:hover{
    opacity: 0.9;
    transform: translateY(-1px);
}

#reset-btn{
    background-color: var(--bg-danger-color);
    color: var(--text-primary-color);
    padding: 0.73rem;
}

#download-btn{
    background-color: var(--bg-success-color);
    color: var(--text-primary-color);
    padding: 0.73rem;
}


main section .bottom{
    background-color: var(--bg-secondary-color);
    width: 100%;
    padding: var(--padding-2xl);
    border-radius: var(--border-radius-xl);

    flex: 1;

    display: flex;
    justify-content: center;
    align-items: center;

    overflow: hidden;

    border: 1px solid rgba(255,255,255,0.05);
}


main section .bottom .placeholder{
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.6;
}

main section .bottom .placeholder i{
    font-size: 8rem;
}

main section .bottom .placeholder p{
    font-size: var(--font-size-lg);
    color: var(--text-secondary-color);
}


main section .right{
    width: 30%;
    background-color: var(--bg-secondary-color);
    padding: var(--padding-lg);
    border-radius: var(--border-radius-xl);

    display: flex;
    flex-direction: column;
    gap: var(--gutter-md);

    overflow-y: auto;
    min-height: 0;

    border: 1px solid rgba(255,255,255,0.05);
}


main section .right .filters{
    display: flex;
    flex-direction: column;
    gap: var(--gutter-md);
}

main section .right .filter{
    width: 100%;
}

main section .right .filter input{
    width: 100%;
    outline: none;
    margin-top: var(--margin-sm);
    appearance: none;
    background: transparent;
}

main section .right .filter input::-webkit-slider-thumb{
    appearance: none;
    cursor: pointer;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: red;
    margin-top: -6px;
}

main section .right .filter input::-webkit-slider-runnable-track{
    height: 3px;
    background-color: rgba(255,255,255,0.3);
}

canvas{
    max-width: 100%;
    max-height: 100%;
    object-fit: contain; 
    display: none;
}

.presets{
    display: flex;
    flex-wrap: wrap;
    gap: var(--gutter-md);
}


@media (max-width: 900px){
    section{
        flex-direction: column;
        height: auto;
    }

    main section .left{
        width: 100%;
        height: auto;
    }

    main section .right{
        width: 100%;
        max-height: 300px;
    }

    main section .bottom{
        min-height: 300px;
    }
}

@media (max-width: 500px){
    main section .top{
        flex-direction: column;
        width: 100%;
    }

    .btn{
        width: 100%;
        text-align: center;
    }
}