:root {
     --contrast: 100%;
     --brightness: 100%;
     --hue-rotate: 0deg;
     --sepia: 0%;
     --accent: #4a90e2;
     --dark-accent: #3f7ac0;
     --gray: #e6e7f0;
     --dark-gray: #4e5056;
}

 .drop-it-hot {
     text-align: center;
     background-color: white;
     border-radius: 15px;

     /* width: 100%; */
     height: 400px;
     position: relative;
     display: flex;
     align-items: center;
     justify-content: center;
     box-shadow: 0 8px 15px 0 rgb(0 0 0 / 10%);
     overflow: hidden;
     margin: 20px;
}

 .drop-it-hot::after {
     content: '';
     position: absolute;
     width: calc(100% - 20px);
     height: calc(100% - 20px);
     border: 2px dashed var(--gray);
     border-radius: 5px;
     z-index: 0;
}

 .circle {
     transition: transform 150ms ease-in;
     z-index: 10;
}

 .drop-it-hot .circle {
     display: flex;
     align-items: center;
     justify-content: center;
     border-radius: 50%;
     position: absolute;
     color: var(--accent);
     background-color: white;
     border: 3px solid var(--gray);
     width: 100px;
     height: 100px;
}

 .circle svg {
     width: 40px;
     height: 40px;
}

 .circle::before {
     content: '';
     background-color: var(--accent);
     width: 130px;
     height: 130px;
     border-radius: 50%;
     position: absolute;
     opacity: 0;
     transition: transform 250ms ease-in, opacity 200ms ease-in;
     z-index: 0;
}

 .circle::after {
     content: '';
     position: absolute;
     width: 100px;
     height: 100px;
     border-radius: 50%;
}

 .circle:hover {
     transform: scale(1.2);
     opacity: 0.9;
}

 .circle:hover::before {
     transform: scale(8);
     opacity: 1;
}

 .circle:hover::after {
     border: 3px solid white;
}

 .highlight svg {
     color: white;
     z-index: 1;
}

 .circle:hover svg {
     color: white;
     z-index: 1;
}

 .highlight::before {
     transform: scale(8);
     opacity: 1;
}

 .highlight::after {
     border: 3px solid white;
}

 .choose-files {
     align-self: flex-end;
     z-index: 10;
}

.btn {
    border: none;
    padding: 10px 20px;
    border-radius: 50px;
    background-color: var(--accent);
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 200ms ease-in;
}

 .button-wrapper {
     display: flex;
     flex-direction: column;
     align-items: center;
     margin-bottom: 40px;
     position: relative;
     overflow: hidden;
     cursor: pointer;
}

 .button-wrapper:hover .btn {
     background-color: var(--dark-accent);
}

 .label {
     margin-bottom: 20px;
     color: var(--dark-gray);
     font-size: 18px;
}

 .button-wrapper input[type="file"] {
     font-size: 100px;
     position: absolute;
     left: 0;
     top: 0;
     opacity: 0;
}



 #gallery {
     position: absolute;
     height: 100%;
     top: 0;
     left: 0;
     z-index: 100;
}

 #gallery img {
     width: 100%;
     height: 100%;
     object-fit: cover;
     filter: contrast(var(--contrast)) brightness(var(--brightness)) sepia(var(--sepia)) hue-rotate(var(--hue-rotate));
}

 .editor {
     display: flex;
     flex-wrap: wrap;
     justify-content: space-between;
     width: 700px;
     padding: 20px;
     box-sizing: border-box;
     background-color: white;
     margin-top: -10px;
     z-index: 100;
     opacity: 0;
     transform: translateY(50px);
}

 .is-visible {
     transition: transform 500ms ease-in-out, opacity 500ms ease-in-out;
     opacity: 1;
     transform: translateY(0);
}

 .range-wrapper {
     display: flex;
     flex-direction: column;
     width: 20%;
}

 .range {
     appearance: none;
     height: 2px;
     border-radius: 5px;
     background: var(--gray);
     outline: none;
     padding: 0;
     margin: 10px 0;
}

 ::-moz-range-track {
     background: var(--gray);
     border: 0;
}

 input::-moz-focus-inner, input::-moz-focus-outer {
     border: 0;
}

 input[type="range"]::-webkit-slider-thumb {
     appearance: none;
     height: 12px;
     width: 12px;
     border-radius: 8px;
     background-color: var(--accent);
     cursor: pointer;
}

 input[type="range"]::-moz-range-thumb {
     appearance: none;
     height: 12px;
     width: 12px;
     border-radius: 8px;
     background-color: var(--accent);
     cursor: pointer;
}

 input[type="range"]::-ms-thumb {
     appearance: none;
     height: 12px;
     width: 12px;
     border-radius: 8px;
     background-color: var(--accent);
     cursor: pointer;
}