/*! Feel rig v0.2 · MIT
 *
 * The figure follows Exploded: a borderless card with mono corner labels and
 * the controls in a margin on the right. The controls follow Fluid
 * Functionalism (fluidfunctionalism.com, MIT). Nothing here has a transition:
 * whatever moves is a Feel spring in rig.js.
 */
:root, .fl {
  /* Canvas colours: plain values, a 2D context can't read color-mix(). */
  --fl-card: #fbfbfa;
  --fl-text: #1b1b1a;
  --fl-muted: #8d8c88;
  --fl-faint: rgba(0, 0, 0, 0.08);
  --fl-line: rgba(0, 0, 0, 0.16);
  --fl-lit: #e8590c;
  --fl-band: rgba(232, 89, 12, 0.09);
  --fl-ghost: rgba(0, 0, 0, 0.4);
  --fl-bench: #f3f3f1;
  --fl-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  --fl-sans: Inter, system-ui, sans-serif;

  /* Fluid Functionalism tokens */
  --ff-fg: #1b1b1a;
  --ff-muted: #737373;
  --ff-faint: #a3a3a3;
  --ff-surface: #ffffff;
  --ff-border: rgba(0, 0, 0, 0.1);
  --ff-hover: rgba(0, 0, 0, 0.045);
  --ff-active: rgba(0, 0, 0, 0.07);
  --ff-code: #f4f4f2;
  --ff-ring: #6b97ff;
  --ff-ring-soft: rgba(107, 151, 255, 0.22);
  --ff-red: #e5484d;
  --ff-normal: "wght" 400, "opsz" 14;
  --ff-semibold: "wght" 550, "opsz" 18;
}
.fl {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 236px;
  grid-template-areas: "card margin" "foot margin";
  column-gap: 28px;
  row-gap: 6px;
  align-items: start;
  color: var(--fl-text);
  font-family: var(--fl-sans);
  font-variation-settings: var(--ff-normal);
}
.fl[data-theme="dark"] {
  --fl-card: #0e0e0f;
  --fl-text: #ececea;
  --fl-muted: #7c7b78;
  --fl-faint: rgba(255, 255, 255, 0.1);
  --fl-line: rgba(255, 255, 255, 0.16);
  --fl-lit: #ff8a3d;
  --fl-band: rgba(255, 138, 61, 0.1);
  --fl-ghost: rgba(255, 255, 255, 0.45);
  --fl-bench: #141416;
  --ff-fg: #ececea;
  --ff-muted: #a1a1a1;
  --ff-faint: #6b6b6b;
  --ff-surface: #18181a;
  --ff-border: rgba(255, 255, 255, 0.12);
  --ff-hover: rgba(255, 255, 255, 0.05);
  --ff-active: rgba(255, 255, 255, 0.09);
  --ff-code: #18181a;
}

/* ── card */
/* The corners sit in the card's own grid, so a long hint or readout wraps instead of covering the bench. */
.fl-card {
  grid-area: card; position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  grid-template-areas: "tl tr" "grid grid" "bl br"; gap: 12px 16px; padding: 16px 18px; background: var(--fl-card); border-radius: 10px; outline: none;
}
.fl-card:focus-visible { outline: 1px solid var(--fl-muted); outline-offset: 6px; }
.fl-corner { font: 11px/1.4 var(--fl-mono); letter-spacing: 0.01em; color: var(--fl-muted); pointer-events: none; }
.fl-tl { grid-area: tl; color: var(--fl-text); }
.fl-tr { grid-area: tr; text-align: right; }
.fl-bl, .fl-br { min-height: 2.8em; }
.fl-bl { grid-area: bl; }
.fl-br { grid-area: br; text-align: right; color: var(--fl-text); font-variant-numeric: tabular-nums; }

.fl-grid { grid-area: grid; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 12px; min-height: 380px; }
.fl-grid.fl-plane { min-height: 500px; }
.fl-bench {
  position: relative; display: grid; place-items: center; min-height: 380px; padding: 24px 16px 36px; box-sizing: border-box; overflow: hidden; border-radius: 10px;
  background: var(--fl-bench) radial-gradient(var(--fl-faint) 1px, transparent 1px) 0 0 / 16px 16px;
}
.fl-stage { display: grid; place-items: center; width: 100%; height: 100%; }
.fl-live { position: absolute; left: 12px; bottom: 10px; font: 10.5px/1 var(--fl-mono); color: var(--fl-muted); font-variant-numeric: tabular-nums; }
.fl-plots { display: grid; grid-template-rows: 1.3fr 1fr 1fr; gap: 10px; }
.fl-plots.fl-plane { grid-template-rows: 1.5fr 0.7fr 1.5fr; }
.fl-plot { position: relative; min-height: 100px; border-radius: 8px; box-shadow: inset 0 0 0 1px var(--fl-faint); }
.fl-plot canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.fl-plot-label { position: absolute; top: 7px; right: 10px; z-index: 1; font: 10px/1 var(--fl-mono); color: var(--fl-muted); }
.fl-plot-label i { font-style: normal; color: var(--fl-lit); }
.fl-plot-label i.fl-dash { color: var(--fl-ghost); }

/* ── under the figure */
.fl-foot { grid-area: foot; display: grid; grid-template-columns: minmax(0, 252px) minmax(0, 1fr); gap: 28px; padding: 0 18px; }
.fl-metrics { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; margin: 0; font: 12px/1.5 var(--fl-mono); color: var(--fl-muted); }
.fl-metrics dt, .fl-metrics dd { margin: 0; }
.fl-metrics dd { color: var(--fl-text); text-align: right; font-variant-numeric: tabular-nums; }
.fl-metrics dt { white-space: nowrap; }
.fl-export .ff-tabs { margin: -4px 0 0 -10px; }
.fl-code-wrap { position: relative; }
.fl-code { max-height: 168px; padding-right: 44px; }
.fl-code-wrap .fl-copy { position: absolute; top: 4px; right: 6px; width: 32px; height: 32px; }

/* ── margin */
.fl-margin { grid-area: margin; display: flex; flex-direction: column; gap: 14px; padding-top: 14px; font: 12px/1.45 var(--fl-mono); color: var(--fl-muted); }
.fl-margin .fl-sec + .fl-sec { padding-top: 14px; border-top: 1px solid var(--fl-faint); }
.fl-sec { display: flex; flex-direction: column; gap: 8px; min-width: 0; margin: 0; }
.fl-label { font: 10px/1.4 var(--fl-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--fl-muted); }
.fl-chips { display: flex; flex-wrap: wrap; gap: 2px; margin: 0 -8px; }
.fl-chips .ff-item { padding: 0 8px; }
.fl-words { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; min-height: 24px; }
.fl-note { font: 12px/16px var(--fl-sans); color: var(--ff-muted); }
.fl-dials { display: flex; flex-direction: column; gap: 6px; }
.fl-keys { display: flex; flex-direction: column; margin: 0 -8px; }
.fl-keys .ff-item { display: flex; gap: 10px; padding: 0 8px; }
.fl-run .ff-tabs { margin-left: -10px; }
.fl-bake { margin: 0; min-height: 32px; font: 12px/16px var(--fl-sans); color: var(--ff-muted); }

/* ───────────────────────────── Fluid Functionalism, ported */

/* A label that changes weight without changing width. */
.ff-t { display: inline-grid; justify-items: center; }
.ff-t > * { grid-area: 1 / 1; white-space: nowrap; }
.ff-ghost { visibility: hidden; font-variation-settings: var(--ff-semibold); }
.ff-same .ff-ghost { font-variation-settings: inherit; }

/* Fluid hover: the highlights sit under the items, inside the box. */
.ff-fluid { position: relative; isolation: isolate; }
.ff-hl { position: absolute; left: 0; top: 0; z-index: -1; width: 0; height: 0; border-radius: 8px; background: var(--ff-hover); opacity: 0; pointer-events: none; will-change: transform, width, height, opacity; }
.ff-tabs .ff-hl { background: var(--ff-active); }
.ff-hl-sel { background: var(--ff-active); }

.ff-item {
  all: unset; box-sizing: border-box; display: inline-flex; align-items: center; height: 28px; padding: 0 10px; border-radius: 8px;
  font: 13px/20px var(--fl-sans); font-variation-settings: var(--ff-normal); color: var(--ff-muted); cursor: pointer;
  -webkit-tap-highlight-color: transparent; user-select: none;
}
.ff-item[data-active], .ff-item.is-on { color: var(--ff-fg); }
.ff-item[data-active] .ff-label, .ff-item.is-on .ff-label { font-variation-settings: var(--ff-semibold); }
.ff-item:focus-visible { outline: 2px solid var(--ff-ring); outline-offset: 0; }
.ff-item:disabled { opacity: 0.4; cursor: not-allowed; }
.ff-tabs { display: flex; flex-wrap: wrap; gap: 2px; }

/* Ghost button, with an icon that swaps to a check or a cross. */
.ff-btn {
  all: unset; box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 28px; padding: 0 10px; border-radius: 8px;
  font: 13px/20px var(--fl-sans); font-variation-settings: var(--ff-normal); color: var(--ff-muted); cursor: pointer; flex: none; user-select: none;
}
.ff-btn:hover { background: var(--ff-hover); color: var(--ff-fg); }
.ff-btn:active { background: var(--ff-active); }
.ff-btn:focus-visible { outline: 2px solid var(--ff-ring); outline-offset: 0; }
.ff-btn.ff-square { width: 36px; height: 36px; padding: 0; }
.ff-icons { display: inline-grid; width: 16px; height: 16px; }
.ff-i { grid-area: 1 / 1; width: 16px; height: 16px; stroke-width: 1.75; }
.ff-i-done, .ff-i-fail { display: none; transform: scale(var(--pop, 1)); }
.is-done .ff-i-idle, .is-fail .ff-i-idle { display: none; }
.is-done .ff-i-done, .is-fail .ff-i-fail { display: block; }
.is-done .ff-i-done { color: var(--ff-ring); }
.is-fail .ff-i-fail { color: var(--ff-red); }

.ff-code {
  margin: 0; padding: 12px 14px; overflow: auto; border-radius: 10px; background: var(--ff-code); box-shadow: inset 0 0 0 1px var(--fl-faint);
  font: 12px/1.6 var(--fl-mono); color: var(--fl-text); white-space: pre-wrap; overflow-wrap: anywhere; outline: none;
}
.ff-code:focus-visible { box-shadow: inset 0 0 0 1px var(--ff-ring), 0 0 0 3px var(--ff-ring-soft); }

.ff-input {
  display: flex; align-items: center; height: 36px; padding: 0 12px; border-radius: 8px; box-sizing: border-box;
  background: var(--ff-surface); box-shadow: inset 0 0 0 1px var(--ff-border), 0 1px 2px rgba(16, 16, 20, 0.04); cursor: text;
}
.ff-input:hover { box-shadow: inset 0 0 0 1px var(--fl-line), 0 1px 2px rgba(16, 16, 20, 0.04); }
.ff-input:focus-within { box-shadow: inset 0 0 0 1px var(--ff-ring), 0 0 0 3px var(--ff-ring-soft); }
.ff-input input { all: unset; flex: 1; min-width: 0; font: 13px/20px var(--fl-sans); color: var(--ff-fg); }
.ff-input input::placeholder { color: var(--ff-faint); }

.ff-badge {
  display: inline-flex; align-items: center; height: 22px; padding: 0 8px; border-radius: 6px;
  background: var(--ff-active); color: var(--ff-fg); font: 12px/16px var(--fl-sans); font-variation-settings: var(--ff-semibold);
}
.ff-badge.is-red { background: color-mix(in oklab, var(--ff-red) 14%, var(--fl-card)); color: color-mix(in oklab, var(--ff-red) 82%, black); }

.ff-kbd {
  display: inline-grid; place-items: center; min-width: 20px; height: 20px; padding: 0 5px; box-sizing: border-box; border-radius: 5px;
  background: var(--ff-surface); box-shadow: inset 0 0 0 1px var(--ff-border), 0 1px 0 var(--ff-border);
  font: 500 11px/1 var(--fl-mono); color: var(--ff-fg);
}

/* The scrubber slider: the row is the track, its fill is the value. */
.ff-slider {
  --p: 0;
  position: relative; display: flex; align-items: center; justify-content: space-between; gap: 8px; height: 32px; padding: 0 10px;
  overflow: hidden; border-radius: 8px; user-select: none;
  font: 13px/20px var(--fl-sans); color: var(--ff-muted);
}
/* The border rides above the fill. */
.ff-slider::after { content: ""; position: absolute; inset: 0; border-radius: inherit; box-shadow: inset 0 0 0 1px var(--ff-border); pointer-events: none; }
.ff-slider-fill { position: absolute; inset: 0 auto 0 0; width: calc(var(--p) * 100%); background: var(--ff-hover); pointer-events: none; }
.ff-slider-preview { position: absolute; top: 0; bottom: 0; left: calc(var(--hl, 0) * 100%); width: calc(var(--hw, 0) * 100%); background: var(--ff-hover); opacity: 0; pointer-events: none; }
.ff-slider.is-hover .ff-slider-preview { opacity: 1; }
.ff-slider-line {
  position: absolute; top: 7px; bottom: 7px; left: clamp(2px, calc(var(--p) * 100% - 1px), calc(100% - 4px)); width: 2px; border-radius: 1px;
  background: var(--ff-fg); opacity: 0.25; pointer-events: none;
}
.ff-slider:hover .ff-slider-line { opacity: 0.5; }
.ff-slider:active .ff-slider-line { opacity: 1; }
.ff-slider-label, .ff-slider-value { position: relative; white-space: nowrap; pointer-events: none; }
.ff-slider:hover .ff-slider-label, .ff-slider:focus-within .ff-slider-label { color: var(--ff-fg); }
.ff-slider-value { color: var(--ff-fg); font-variant-numeric: tabular-nums; }
.ff-slider-value em { margin-left: 3px; font-style: normal; color: var(--ff-muted); }
.ff-slider input { -webkit-appearance: none; appearance: none; position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; margin: 0; background: transparent; opacity: 0; cursor: pointer; }
.ff-slider input::-webkit-slider-thumb { -webkit-appearance: none; width: 2px; height: 32px; }
.ff-slider input::-moz-range-thumb { width: 2px; height: 32px; border: 0; }
.ff-slider:has(input:focus-visible) { box-shadow: 0 0 0 3px var(--ff-ring-soft); }
.ff-slider:has(input:focus-visible)::after { box-shadow: inset 0 0 0 1px var(--ff-ring); }

@media (max-width: 900px) {
  .fl { grid-template-columns: minmax(0, 1fr); grid-template-areas: "card" "margin" "foot"; row-gap: 22px; }
  .fl-grid { grid-template-columns: minmax(0, 1fr); }
  .fl-margin { padding: 0 18px; }
  .fl-foot { grid-template-columns: minmax(0, 1fr); }
}