style.css

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

:root {
    color-scheme: light dark;

    --bg: #F9DC43;
    --col: #121313;

    --window-bg: #1D1E1F;
    --window-title: #A0A0A0;
    --window-frg: #ffffff6b;
}

body {
    background: var(--bg);
    color: var(--col);
    min-width: 100vw;
    min-height: 100vh;
}

.window {
    width: 100vw;
    height: 32px;
    background: var(--window-bg);
    color: var(--window-title);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    left: 0;
    border-bottom: 1px solid var(--window-frg);
    z-index: 9999;
    -webkit-app-region: drag;
    -webkit-user-drag: none;
    user-select: none;
    -webkit-user-select: none;
}

.title-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-left: 8px;
}

.title-bar-text {
    font-size: 14px;
    padding-bottom: 1px;
}

.window img {
    width: 16px;
    height: 16px;
}

.window-commands {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-right: 8px;
    pointer-events: auto;
    -webkit-app-region: no-drag;
    user-select: none;
    -webkit-user-select: none;
    cursor: pointer;
}

.window-commands div {
    width: 16px;
    height: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.window-commands div:hover {
    transform: scale(1.1);
    filter: invert(1);
}

.window-content {
    width: 100vw;
    height: calc(100vh - 32px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.window-bottom {
    width: 100vw;
    height: 32px;
    background: var(--window-bg);
    color: var(--window-title);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    bottom: 0;
    left: 0;
}