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

body {
    font-family: system-ui, sans-serif;
}

#app {
    --panel-size: min(50vw, 60vh);   /* the largest square that fits */
    display: flex;
    height: var(--panel-size);
}

#canvas-container {
    position: relative;
    flex: 0 0 var(--panel-size);
    border-right: 2px solid black;
}

#canvas {
    display: block;
}

#sidebar {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

#inputs {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    margin: 12px 0;
}

.input-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.input-title {
    font-family: 'Times New Roman', serif;
    font-size: 20px;
}

.matrix-inputs {
    display: grid;
    grid-template-columns: repeat(3, 60px);
    gap: 6px;
}

.vector-inputs {
    display: grid;
    grid-template-columns: 60px;
    gap: 6px;
}

.entry {
    width: 100%;
    padding: 4px;
    text-align: center;
    box-sizing: border-box;
}

#formula {
    display: flex;
    flex-direction: column;
    gap: 16px 12px;
    align-items: center;
}

#controls {
    display: flex;
    gap: 16px;
    align-items: center;
}

.label {
    font-size: 14px;
    font-weight: 600;
    text-shadow: 0 0 3px white, 0 0 3px white;
}

#calculation-container {
    display: flex;
    justify-content: space-evenly;
    gap: 16px;
    border-top: 2px solid black;
}

.equation {
    font-size: 0.9em;
}

.calc-cont {
    padding: 20px;
}