Control Center · Deep Dive
deep diveThe full version of the Control Center: density, digest frequency, avatar shape and a focus goal with history. Eight states and every action, binding and history function in one stylesheet.
source
preview · runtimelocal state · nothing saved
trace
Interact with the preview to see how state flows through CSS. Every value here is observed in the running preview.
/* Layout and typography live in base.css, shared by both versions. */
/* ── State ───────────────────────────────── */
.control-center {
--theme: state(light);
--accent: state(ember);
--density: state(comfortable);
--notify: state(true);
--digest: state("Daily");
--name: state("Alex Rivera");
--round: state(true);
--goal: state(4);
--goal-was: previous(--goal);
}
/* ── Appearance controls ─────────────────── */
.theme-option.light:on(click) { --theme: set(light); }
.theme-option.dark:on(click) { --theme: set(dark); }
.theme-option.system:on(click) { --theme: set(system); }
.swatch.ember:on(click) { --accent: set(ember); }
.swatch.moss:on(click) { --accent: set(moss); }
.swatch.slate:on(click) { --accent: set(slate); }
.density-button:on(click) {
--density: cycle(comfortable, compact);
}
/* ── Theme and accent ────────────────────── */
.control-center {
--bg: #fbfaf7;
--fg: #1c1917;
--tint: #c8462c;
background: var(--bg);
color: var(--fg);
transition: background 200ms, color 200ms;
}
.control-center:when(--theme == dark) {
--bg: #1c1917;
--fg: #f5f5f4;
}
@media (prefers-color-scheme: dark) {
.control-center:when(--theme == system) {
--bg: #1c1917;
--fg: #f5f5f4;
}
}
.control-center:when(--accent == moss) { --tint: #3f7a5a; }
.control-center:when(--accent == slate) { --tint: #4d6284; }
.theme-option.light:when(--theme == light),
.theme-option.dark:when(--theme == dark),
.theme-option.system:when(--theme == system) {
background: var(--fg);
color: var(--bg);
}
.swatch.ember:when(--accent == ember),
.swatch.moss:when(--accent == moss),
.swatch.slate:when(--accent == slate) {
outline: 2px solid var(--fg);
}
/* ── Density ─────────────────────────────── */
.control-center {
--gap: when(--density == compact, 8px, 16px);
--row: when(--density == compact, 36px, 48px);
}
.panel { padding: var(--gap); }
.setting { min-height: var(--row); }
.density-button::after {
content: when(--density == compact, "Compact", "Comfortable");
}
/* ── Notifications ───────────────────────── */
.notify-switch:on(click) {
--notify: toggle();
}
.notify-switch {
background: when(--notify, var(--tint), #d9d5cf);
}
.notify-switch::after {
translate: when(--notify, 18px, 0);
}
.status::after {
content: when(--notify, "On", "Muted");
}
.digest input:on(change) { --digest: set(event(value)); }
.digest {
opacity: when(--notify, 1, 0.4);
pointer-events: when(--notify, auto, none);
}
/* ── Profile fields ──────────────────────── */
/* Each field copies its value into the panel's state when it changes. */
.profile input[type="text"]:on(input) { --name: set(event(value)); }
.profile input[type="checkbox"]:on(change) { --round: set(event(checked)); }
.avatar {
background: var(--tint);
border-radius: when(--round, 50%, 6px);
}
/* ── Focus goal and history ──────────────── */
.goal .plus:on(click) { --goal: increment(1); }
.goal .minus:on(click) { --goal: decrement(1); }
.goal .minus:when(--goal <= 1),
.goal .plus:when(--goal >= 10) {
opacity: 0.35;
pointer-events: none;
}
.goal output::before {
counter-reset: n var(--goal);
content: counter(n);
}
.goal .was::before {
counter-reset: w var(--goal-was);
content: "was " counter(w);
}
.goal:changed(--goal) output {
animation: when(direction(--goal) > 0, rise, fall) 240ms;
}
.goal .trend::after {
content: when(direction(--goal) > 0, "↑ up", "↓ down");
}
.goal:when(direction(--goal) == 0) .history {
visibility: hidden;
}
/* ── Live preview ────────────────────────── */
.preview .name::after { content: var(--name); }
.preview .schedule::after { content: var(--digest); }
.preview .bell {
opacity: when(--notify, 1, 0.35);
}
.preview .badge:when(--notify) {
display: inline-grid;
}
.preview .meter {
width: calc(var(--goal) * 10%);
background: var(--tint);
}
inspector
Select any red expression or state name in style.css, a step in the trace, or a row in the state panel. Hover previews it, a click pins it.
Keyboard: Tab reaches each expression; Enter pins it, Escape clears it.
stateowned by .control-center
statevalueprevious
Appearance
Notifications
Profile
Focus goal
Caution · Visual behavior
This stylesheet changes styles only. Here the switch, theme buttons and swatches never expose aria-checked or aria-pressed. The vanilla version does. The experimental --attr-* properties can write both, for example --attr-aria-checked: var(--notify). For production, prefer native checkboxes and radios, as the Control Center does.