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

button {
    cursor: pointer;
}

body {
    background-color: black;
    position: relative;
}

canvas {
    display: block;
}

aside {
    position: fixed;
    top: 0;
    right: 0;
    padding: 1em;
    backdrop-filter: blur(10px);
    background-color: rgb(32 32 32 / 32%);
    max-height: 100vh;
    overflow: scroll;
    scrollbar-width: none;
}

aside > nav {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: end;
    gap: 1em;
    margin-bottom: 1em;
}

#matrix-nav,
#controls {
    z-index: -1;
}

aside > nav button {
    border-radius: 8px;
}

aside > nav button:hover {
    opacity: .9;
}

#open-controls-btn span[role=img] {
    display: block;
    padding-block: .75rem;
    padding-inline: .75rem;
}

#open-controls-btn span[role=img] > span {
    display: block;
    width: 2.5rem;
    height: 3px;
    border-radius: 3px;
    background-color: grey;
    margin-bottom: 1em;
    position: relative;
}

#open-controls-btn span[role=img] > span:last-child {
    margin-bottom: 0;
}

#open-controls-btn span[role=img] > span::after {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    
    width: 10px;
    aspect-ratio: 1;
    border-radius: 100%;
    background-color: darkred;
}

#open-controls-btn span[role=img] > span:nth-child(2):after {
    left: 50%;
}
#open-controls-btn span[role=img] > span:last-child::after {
    left: 15%;
}

#open-matrix-nav-btn {
    padding: .25em;
}

#open-matrix-nav-btn span[role=img] {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

#open-matrix-nav-btn span[role=img] .left-bracket,
#open-matrix-nav-btn span[role=img] .right-bracket {
    width: .5em;
    height: 2.5em;
    border-top: 2px solid black;
    border-bottom: 2px solid black;
}

#open-matrix-nav-btn span[role=img] .left-bracket {
    border-top-left-radius: 8px;
    border-bottom-left-radius: 8px;
    border-left: 2px solid black;
}

#open-matrix-nav-btn span[role=img] .right-bracket {
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    border-right: 2px solid black;
}

#open-matrix-nav-btn span[role=img] .center {
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

aside input {
    font: inherit;
}

/* 
  Controls */

#controls {
    color: whitesmoke;
    font-size: 1.2rem;
}

#controls form > fieldset {
    padding: 1em;
    padding-top: 0;
}

#custom-matrix > button {
    display: block;
    margin-left: auto;
    margin-top: .25em;
    margin-bottom: 1em;
}

#custom-matrix > fieldset > fieldset {
    padding: .5em;
    padding-top: .25em;
}

#custom-matrix > fieldset > fieldset,
#scalars div {
    margin-top: .5em;
}

/* 
  Matrix Nav */

#matrix-nav .card {
    margin-bottom: .5em;
}

.card {
    --text-line-length: 70ch;
    --padding: 1em;
    --border-thickness: 1px;
    --card-max-width: calc(var(--text-line-length) + var(--padding)*2 + var(--border-thickness)*2);

    font-size: 1rem;
    padding: var(--padding);
    border: 1px solid #ccc;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: var(--card-max-width);
    background-color: hsl(220, 10%, 11%);
    color: rgb(236, 239, 242);
}

.card h2 {
    margin-top: 0;
    margin-bottom: .5em;
}

.card p {
    color: var(--clr-txt);
    line-height: 1.4;
}

.card ul,
.card ol {
    list-style-position: inside;
    line-height: 1.5;
    margin-block: .5em;
}

.external-link {
    color: rgb(115, 122, 222);
}

.external-link:hover {
    color: rgb(88, 95, 222);
}

.card footer {
    margin-top: 1em;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media (min-width: 500px) {
    .card {
        font-size: 1.2rem;
    }

    .card time,
    .card a {
        font-size: 1.2rem;
    }
}

.card-btn {
    font-size: 1.1rem;
    padding: .25em .5em;
    border-radius: 8px;
    border: 1px solid #ababab;
    transition: all 0.035s ease;
    user-select: none;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.card-btn:hover {
    border-color: #999;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.card-btn:active {
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    transform: translateY(1px);
}

@media (min-width: 500px) {
    .card-btn {
        font-size: 1.2rem;
    }
}

/*
  States */

.hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.display-block {
    display: block;
}

.display-inline-block {
    display: inline-block;
}

.display-none {
    display: none;
}

.display-opaque {
    opacity: .5;
}
/* Not used. Thought about it. Left here just in case. */
canvas.display-opaque {
    pointer-events: none;
}