Andy Smith
136 lines
3.4 KiB
CSS
136 lines
3.4 KiB
CSS
.knob {
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--knob-angle-reserve: 120deg;
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--knob-angle: calc((360deg - var(--knob-angle-reserve)) / (var(--knob-options) - 1));
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--knob-button-size: 3ch;
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--knob-chamfer-size: 1ch;
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--knob-color: oklch(var(--lch-ink-light));
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--knob-color-accent: oklch(var(--lch-red-medium));
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--knob-tick-size: 1ch;
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--knob-radius: calc(var(--knob-size) / 2);
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--knob-size: 96px;
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aspect-ratio: 1;
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block-size: calc(var(--knob-size) + var(--knob-button-size) * 2);
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border: none;
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display: grid;
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font-weight: 500;
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inline-size: fit-content;
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place-content: center;
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position: relative;
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}
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.knob__slider {
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appearance: none;
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background-color: transparent;
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block-size: var(--knob-size);
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inline-size: var(--knob-size);
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inset: 50% auto auto 50%;
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position: absolute;
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translate: -50% -50%;
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z-index: 1;
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&::-webkit-slider-runnable-track {
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block-size: var(--knob-size);
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cursor: grab;
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}
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&::-webkit-slider-thumb {
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appearance: none;
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background-color: transparent;
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}
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}
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.knob__option {
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block-size: var(--knob-button-size);
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border-radius: 50%;
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cursor: pointer;
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display: grid;
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inline-size: var(--knob-button-size);
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inset: 50% auto auto 50%;
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place-content: center;
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position: absolute;
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transform:
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translate(-50%, -50%)
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rotate(calc(-1 * var(--knob-angle-reserve) + (var(--knob-angle) * var(--i))))
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translateY(calc(-1 * var(--knob-radius) - 50% - var(--knob-tick-size)));
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z-index: 1;
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&:hover,
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&:has(input:checked) {
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color: var(--knob-color-accent);
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}
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/* Tick marks */
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&:before {
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background-color: var(--knob-color);
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block-size: var(--knob-tick-size);
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content: "";
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inline-size: 2px;
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inset: 100% auto auto 50%;
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position: absolute;
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translate: -50% 0;
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}
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/* The value text */
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span {
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rotate: calc(var(--knob-angle-reserve) - (var(--knob-angle) * var(--i)));
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}
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input {
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opacity: 0;
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position: absolute;
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}
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}
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.knob__knob {
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background: linear-gradient(to top, var(--knob-color), color-mix(in oklch, var(--knob-color) 50%, var(--color-canvas) 50%));
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block-size: var(--knob-size);
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border-radius: 50%;
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box-shadow:
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0 0 2px 1px rgba(0,0,0,0.10),
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0 2px 4px rgba(0,0,0,0.15),
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0 2px 8px rgba(0,0,0,0.20);
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inline-size: var(--knob-size);
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position: relative;
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&:before,
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&:after {
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content: "";
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position: absolute;
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}
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/* Indent */
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&:before {
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background: linear-gradient(to bottom, var(--knob-color), color-mix(in oklch, var(--knob-color) 50%, var(--color-canvas) 50%));
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block-size: calc(var(--knob-size) - var(--knob-chamfer-size));
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border-radius: 50%;
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box-shadow:
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0 -1px 0 rgba(255, 255, 255, 0.25),
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inset 0 -1px 0 rgba(255, 255, 255, 0.25);
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inline-size: calc(var(--knob-size) - var(--knob-chamfer-size));
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inset: 50% auto auto 50%;
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translate: -50% -50%;
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}
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/* Indicator */
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&:after {
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background-color: var(--color-ink);
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block-size: calc(var(--knob-radius) - var(--knob-chamfer-size) / 2);
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border-radius: 50% 50% 2px 2px;
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inline-size: 4px;
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inset: auto auto 50% 50%;
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rotate: calc(-1 * var(--knob-angle-reserve) + (var(--knob-angle) * var(--knob-index)));
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transform-origin: center bottom;
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transition: rotate 100ms;
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translate: -50% 0;
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}
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}
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.knob__label {
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font-weight: bold;
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inset: 50% auto auto 50%;
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position: absolute;
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text-transform: uppercase;
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transform: translate(-50%, calc(var(--knob-radius) + var(--knob-tick-size)));
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}
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