:root {
    --border-round: 0.35rem;
    --hover-transition: opacity 0.1s;
    --finishing-transition: opacity 0.5s;
}

* {
    margin: 0 0;
    padding: 0 0;
}

html {
    width: 100vw;
    height: 100vh;

    background-color: var(--background);
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;

    font-family: var(--font-family);
    user-select: none;
    color: var(--text-color);

    transition: background-image 2s;
}

h1 {
    font-weight: 300;
}

h2,
h3,
h4,
h5 {
    font-weight: 400;
}

progress {
    appearance: none;
    overflow: hidden;
    border-radius: 1rem;
}

::-webkit-progress-bar {
    background: var(--shadow-color);
}

::-webkit-progress-value {
    background: var(--primary-color);
}

input[type='range'] {
    appearance: none;

    cursor: pointer;
    border-radius: 1rem;
    background-color: transparent;
    height: 1rem;
}

input[type='range']::-webkit-slider-runnable-track {
    appearance: none;

    height: 0.35rem;

    border-radius: 1rem;
    background: linear-gradient(to right, white, white), var(--secondary-color);
    background-size: var(--value, 0%) 100%;
    background-repeat: no-repeat;
}

input[type='range']::-webkit-slider-thumb {
    appearance: none;

    width: 1rem;
    height: 1rem;
    transform: translateY(calc(0.35rem / 2 - 50%));

    border: 2px solid white;
    border-radius: 1rem;
    background-color: black;
}

.hover {
    opacity: 0.75;
    transition: var(--hover-transition);
}

.hover:hover {
    opacity: 1;
}

#error-wrapper {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translate(-50%);
    max-width: calc(100% - 3.5rem);
    max-height: calc(100% - 3.5rem);

    display: flex;
    flex-direction: column;
    gap: 0.5rem;

    background-color: rgba(0, 0, 0, 0.9);
    color: rgb(250, 250, 250);
    padding: 0.75rem;
    border: 1px solid var(--secondary-color);
    border-radius: var(--border-round);
    z-index: 1;
}

#error-wrapper > header {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

#error-log {
    min-width: calc(100% - 1rem);
    max-width: calc(100% - 1rem);
    height: calc(100% - 1rem);

    background-color: rgb(15, 15, 15);
    color: rgb(225, 225, 225);
    padding: 0.5rem;
    border: none;
    border-radius: var(--border-round);
}

#error-log:focus {
    outline: none;
}

#background-video,
#background-embed {
    position: fixed;
    top: 0;
    left: 0;

    width: 100vw;
    height: 100vh;
    object-fit: cover;
}

#overlay {
    width: 100vw;
    height: 100vh;
}

#logo {
    width: 5rem;
    height: 5rem;
    object-fit: contain;
}

#audio-controls {
    position: fixed;
    left: 50%;
    bottom: 3.5rem;
    transform: translateX(-50%);
    overflow: hidden;
    width: 2.5rem;

    background-color: var(--shadow-color);
    border: 1px solid var(--secondary-color);
    border-radius: var(--border-round);

    transition: 0.25s ease-out;
}

#audio-controls:hover {
    width: 8rem;
}

#audio-mute {
    appearance: none;
    display: flex;
    align-items: center;
    justify-content: center;

    background-color: transparent;
    padding: 0.5rem;

    border: none;
    border-radius: var(--border-round);
}

#audio-mute:hover {
    cursor: pointer;
}

#audio-volume {
    position: absolute;
    left: 2.75rem;
    width: 4.5rem;
    top: 50%;
    transform: translateY(-50%);
}

#loadscreen-wrapper,
#finishing-wrapper {
    transition: var(--finishing-transition);
}

#loadscreen-wrapper,
#finishing-wrapper,
#overlay {
    pointer-events: none;
}