:root {
    --window-bg: #fff;
    --window-border: #5f5f5f;
    --window-text: #000000;
    --window-button-hover: #e81123;
    --window-button-hover-text: #fff;
    --progress-bg: #f3f3f3;
    --progress-border: #ccc;
    --progress-color: #14af37;
    --progress-highlight: #6fdf7b;
    --button-bg: #e1e1e1;
    --button-border: #ccc;
    --button-hover-bg: #e5f1fb;
    --button-hover-border: #0078d7;
    --button-disabled-bg: #cccccc;
    --button-disabled-border: #bfbfbf;
    --button-disabled-text: #7e859c;
}

.window {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: auto;
    background-color: var(--window-bg);
    border: 1px solid var(--window-border);
    color: var(--window-text);
    z-index: 1000;
    font-family: 'Segoe UI', sans-serif;
    box-sizing: border-box;
    animation: window-appear 0.2s steps(5);
    transform-origin: center;
}

@keyframes window-appear {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.97);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

.window-header {
    background-color: var(--window-bg);
    display: flex;
    font-size: 0.75em;
    justify-content: space-between;
    align-items: center;
    padding-left: calc(0.75em + 1px);
    user-select: none;
}

.window-close,
.window-minimize {
    background-color: transparent;
    border: none;
    color: var(--window-text);
    padding: 5px;
    cursor: pointer;
    width: 2.5em;
    transition: background-color 0.2s;
}

.window-close:hover,
.window-close:active {
    background-color: var(--window-button-hover);
    color: var(--window-button-hover-text);
}

.window-close::before {
    content: "✕";
    position: relative;
    top: -2px;
    font-family: 'Segoe UI', sans-serif;
    font-weight: 400;
}

.window-minimize::before {
    content: "−";
    position: relative;
    top: -2px;
    font-family: 'Segoe UI', sans-serif;
    font-weight: 400;
}

.window-content {
    padding: 0.75em;
    min-height: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1em;
}

#bottom-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    width: 100%;
}

#estimate {
    font-size: 0.75em;
    color: var(--window-text);
    font-weight: 400;
}

#window-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#download-bar {
    background-color: var(--progress-bg);
    border: 1px solid var(--progress-border);
    height: 20px;
    width: 100%;
    overflow: hidden;
}

#download-progress {
    position: relative;
    background: var(--progress-color);
    height: 100%;
    width: 0%;
    transition: width 0.4s linear;
    overflow: hidden;
}

#download-progress::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 300px;
    height: 100%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0),
        var(--progress-highlight),
        rgba(255, 255, 255, 0)
    );
    animation: scroll 1s linear infinite;
}

@keyframes scroll {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

#download-open {
    background-color: var(--button-bg);
    color: var(--window-text);
    border: var(--button-border) 1px solid;
    padding: 0.2em 1.7em;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 0.75em;
}

#download-open:disabled {
    background-color: var(--button-disabled-bg);
    border: var(--button-disabled-border) 1px solid;
    color: var(--button-disabled-text);
    cursor: default;
}

#download-open:hover:not(:disabled) {
    background-color: var(--button-hover-bg);
    border: var(--button-hover-border) 1px solid;
}