html, body, * {
    background-color: #000;
    margin: 0 auto;
    text-align: center;
    overflow: hidden;
    font-family: 'Courier New', Courier, monospace;
}
#main {
    display: grid;
    width: 95vw;
    height: 95vh;
    gap: 0.2vw;
    justify-items: stretch;
    align-items: stretch;
    border: 1px solid #333;
    margin: 1vw auto;
}
canvas {
    border: 1px ridge #7a7265;
    border-radius: 5px;
    margin: 0.5vw;
}
aside#help {
    position: fixed;
    left: 50%;
    top: 8vh;
    transform: translateX(-50%);
    padding: 1.2rem;
    background: rgba(10, 12, 20, 0.75);
    color: #fdf6e3;
    border: 1px solid rgba(0, 204, 255, 0.25);
    border-radius: 12px;
    width: min(48rem, 90vw);
    max-height: 70vh;
    overflow: auto;
    display: none;
    box-shadow: 0 8px 30px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,204,255,0.05) inset;
    backdrop-filter: blur(6px) saturate(1.1);
    transition: transform 180ms ease, opacity 180ms ease;
    font-size: 0.95rem;
    line-height: 1.4;
}

aside#help h4 { 
    margin: 0 0 0.4rem 0;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

aside#help h4::before {
    content: '';
    width: 14px;
    height: 14px;
    background: linear-gradient(45deg, #00ccff, #7a5cff);
    border-radius: 3px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

aside#help p { 
    margin: 0 0 0.5rem 0; 
    color: #cfefff; 
}

aside#help ul { 
    text-align: left; 
    padding-left: 1.2rem; 
    margin: 0; 
}

/* Align key label and description into two columns so multi-line descriptions line up */
aside#help li { 
    display: grid; 
    grid-template-columns: auto 1fr; 
    gap: 0.6rem; 
    margin: 0.35rem 0; 
    align-items: start; 
}

aside#help strong { 
    /* Make key look like a compact keycap */
    width: 2.1rem;
    display: inline-grid;
    place-items: center;
    text-align: center; 
    background: linear-gradient(180deg,#111,#222);
    color: #fff; 
    padding: 0.18rem 0.36rem; 
    border-radius: 6px; 
    font-weight: 700; 
    box-shadow: 0 1px 0 rgba(255,255,255,0.02) inset; 
}

aside#help * {
    background: transparent;
}

.close {
    position: absolute;
    right: 0.6rem;
    top: 0.5rem;
    width: 1.6rem;
    height: 1.6rem;
    display: inline-grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    color: #fda;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 120ms ease, background 120ms ease;
}

.close:hover {
    transform: rotate(90deg) scale(1.05);
    background: rgba(255,255,255,0.12);
}