/* ==========================================================================
   DDS-4 · Industrial Instrument
   Fourth dani design system, additive. Every name is .dds4-* so it compiles
   beside dot.css (DDS-2) and dds3.css (DDS-3) with no collision.
   Values: dds4-tokens.yaml. Rules: DDS4.md. Drawn: gallery/index.html.

   Usage:  <body class="dds4 dds4-tools dds4-light">
           .dds4            faces, motion, base variables
           .dds4-<product>  the accent (one rule per mode)
           .dds4-light | .dds4-dark
   ========================================================================== */

@font-face { font-family: 'Space Grotesk'; src: url('fonts/SpaceGrotesk-Regular.ttf') format('truetype'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Space Grotesk'; src: url('fonts/SpaceGrotesk-Medium.ttf') format('truetype'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Space Grotesk'; src: url('fonts/SpaceGrotesk-SemiBold.ttf') format('truetype'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Space Grotesk'; src: url('fonts/SpaceGrotesk-Bold.ttf') format('truetype'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Space Mono'; src: url('fonts/SpaceMono-Regular.ttf') format('truetype'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Space Mono'; src: url('fonts/SpaceMono-Bold.ttf') format('truetype'); font-weight: 700; font-display: swap; }

/* ── Base ─────────────────────────────────────────────────────────────── */
.dds4 {
  --sans: 'Space Grotesk', system-ui, sans-serif;
  --mono: 'Space Mono', ui-monospace, monospace;

  /* instrument — fixed, never per product */
  --lcd-glass: #1F1F1B; --lcd-text: #F2B33D; --lcd-dim: #C9A45A;
  --lcd-label: #8F8B80; --lcd-off: #3A3934; --lcd-ok: #7BC34E;
  --led-ok: #5E9E3A; --led-ok-glow: #7BC34E; --led-warn: #E0A100;
  --led-error: #D23C2C; --done-edge: #3F6F25;

  /* radii */
  --r-seg: 2px; --r-thumb: 6px; --r-chip: 7px; --r-tip: 8px; --r-card: 10px;
  --r-field: 12px; --r-key: 14px; --r-panel: 16px; --r-grille: 18px;
  --r-unit: 22px; --r-pill: 28px;

  /* space */
  --g-xs: 4px; --g-sm: 8px; --g-md: 12px; --g-lg: 16px; --g-xl: 24px; --g-xxl: 32px;

  /* motion */
  --t-press: 90ms; --t-quick: 180ms; --t-normal: 320ms; --t-slow: 600ms;
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --spring-strong: cubic-bezier(0.34, 1.8, 0.5, 1);
  --out: cubic-bezier(0.2, 0.8, 0.2, 1);

  font-family: var(--sans);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.dds4-light, .dds4.dds4-light {
  --page: #DEDCD6; --body: #F1F0EB; --key: #F7F6F2; --key-edge: #C9C6BD;
  --well: #E4E2DC; --well-shadow: rgba(40, 36, 30, 0.18); --hairline: #D6D3CB;
  --text: #2A2A28; --text-2: #5A5750; --text-3: #7A776F;
  --led-off: #C9C6BD; --grille-dot: #3A3934;
  --unit-shadow: 0 30px 60px -30px rgba(40, 36, 30, 0.25), 0 2px 6px rgba(40, 36, 30, 0.12);
  --unit-border: transparent;
  --key-drop: rgba(40, 36, 30, 0.10);
  color-scheme: light;
}
.dds4-dark, .dds4.dds4-dark {
  --page: #111110; --body: #1C1C1A; --key: #262624; --key-edge: #0B0B0A;
  --well: #151513; --well-shadow: rgba(0, 0, 0, 0.5); --hairline: #2E2E2B;
  --text: #EDECE6; --text-2: #B5B2A9; --text-3: #8C8980;
  --led-off: #3A3A36; --grille-dot: #4A4945;
  --unit-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.6), 0 2px 6px rgba(0, 0, 0, 0.4);
  --unit-border: #2E2E2B;
  --key-drop: rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

/* ── Accents · one rule per product per mode ──────────────────────────── */
.dds4-tools.dds4-light, .dds4-light .dds4-tools, .dds4-light.dds4-tools {
  --accent: #D6249F; --on-accent: #FFFFFF; --accent-edge: #141896; --tile: #D6249F;
}
.dds4-tools.dds4-dark, .dds4-dark .dds4-tools, .dds4-dark.dds4-tools {
  --accent: #FF5CC8; --on-accent: #0B0B0B; --accent-edge: #3B40C4; --tile: #D6249F;
}
/* Any other product: two rules, never a new token.
   .dds4-subs.dds4-light { --accent:#007504; --on-accent:#FFF; --accent-edge:color-mix(in srgb,#007504 45%,#000); } */
.dds4 { --accent-wash: color-mix(in srgb, var(--accent) 8%, transparent); }

/* ── Type ─────────────────────────────────────────────────────────────── */
.dds4-display { font: 600 44px/1.0 var(--sans); letter-spacing: -1.5px; }
.dds4-title   { font: 600 26px/1.1 var(--sans); letter-spacing: -0.6px; }
.dds4-heading { font: 600 17px/1.25 var(--sans); }
.dds4-body    { font: 400 15px/1.5 var(--sans); }
.dds4-body-sm { font: 500 13px/1.4 var(--sans); color: var(--text-3); }
.dds4-mono    { font: 400 14px/1.4 var(--mono); }
.dds4-label   { font: 400 11px/1.3 var(--mono); letter-spacing: 1.3px; text-transform: uppercase; color: var(--text-3); }

/* ── Surfaces · the four layers ───────────────────────────────────────── */
.dds4-page  { background: var(--page); }
.dds4-unit  {
  background: var(--body); border-radius: var(--r-unit);
  padding: 24px 28px 32px; box-shadow: var(--unit-shadow);
  border: 1px solid var(--unit-border);
}
.dds4-panel {
  background: var(--key); border-radius: var(--r-panel); padding: 16px;
  box-shadow: 0 3px 0 var(--key-edge), 0 4px 10px var(--key-drop);
}
.dds4-well {
  background: var(--well); border-radius: var(--r-panel); padding: 14px;
  box-shadow: inset 0 2px 5px var(--well-shadow);
  border-top: 1.5px solid var(--well-shadow);
}
.dds4-hdr { display: flex; align-items: center; gap: 12px; min-height: 28px; }
.dds4-hdr > .dds4-label:first-child { flex: 1; }
.dds4-hdr .dds4-hdr-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.dds4-labelrow { display: flex; justify-content: space-between; gap: 12px; }

/* ── Keys ─────────────────────────────────────────────────────────────── */
.dds4-key {
  appearance: none; border: 0; cursor: pointer; color: var(--text);
  font: 600 15px/1.2 var(--sans); padding: 14px 16px; border-radius: var(--r-key);
  background: var(--key); display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  box-shadow: 0 3px 0 var(--key-edge), 0 4px 10px var(--key-drop);
  transition: transform var(--t-press) ease-out, box-shadow var(--t-press) ease-out, background var(--t-press);
}
.dds4-key:hover { transform: translateY(-1px); box-shadow: 0 4px 0 var(--key-edge), 0 5px 12px var(--key-drop); }
.dds4-key:active, .dds4-key.is-on {
  transform: translateY(3px);
  box-shadow: 0 1px 6px var(--well-shadow);
  background: color-mix(in srgb, var(--key) 55%, var(--well));
}
.dds4-key.is-on { color: var(--accent); }
.dds4-key:disabled { opacity: .5; cursor: default; transform: none; }
.dds4-key:focus-visible, .dds4-action:focus-visible, .dds4-mini:focus-visible,
.dds4-toggle:focus-visible, .dds4-check:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px;
}
.dds4-key--sm   { padding: 8px 12px; font-size: 13px; border-radius: 10px; }
.dds4-key--icon { width: 44px; height: 44px; padding: 0; }
.dds4-key--icon.dds4-key--sm { width: 32px; height: 32px; border-radius: 9px; }
.dds4-key svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* The accent key that starts a job. */
.dds4-action {
  appearance: none; border: 0; cursor: pointer; position: relative; overflow: hidden;
  height: 56px; min-width: 170px; padding: 0 28px; border-radius: var(--r-pill);
  background: var(--accent); color: var(--on-accent); font: 600 16px/1 var(--sans);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  box-shadow: 0 3px 0 var(--accent-edge), 0 6px 14px color-mix(in srgb, var(--accent) 35%, transparent);
  transition: transform var(--t-press), box-shadow var(--t-press), background var(--t-quick);
}
.dds4-action:active, .dds4-action.is-busy {
  transform: translateY(2px); box-shadow: 0 1px 0 var(--accent-edge);
}
.dds4-action.is-busy { animation: dds4-hum 120ms linear infinite alternate; }
.dds4-action.is-done { background: var(--led-ok); color: #fff; box-shadow: 0 3px 0 var(--done-edge), 0 6px 14px rgba(94, 158, 58, .35); }
.dds4-action:disabled { opacity: .45; cursor: default; }
.dds4-action--block { width: 100%; }
.dds4-action svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.dds4-action .dds4-ripple {
  position: absolute; left: 50%; top: 50%; width: 10px; height: 10px; margin: -5px;
  border-radius: 50%; background: rgba(255, 255, 255, .45); pointer-events: none;
  animation: dds4-ripple 700ms ease-out forwards;
}
@keyframes dds4-hum { from { translate: -0.8px 0; } to { translate: 0.8px 0; } }
@keyframes dds4-ripple { to { transform: scale(40); opacity: 0; } }

/* Round mini key (− / + on a dial). */
.dds4-mini {
  appearance: none; border: 0; cursor: pointer; width: 36px; height: 36px; border-radius: 50%;
  background: var(--well); color: var(--text); font: 400 18px/1 var(--mono);
  box-shadow: 0 2px 0 var(--key-edge); transition: transform var(--t-press), box-shadow var(--t-press);
}
.dds4-mini:active { transform: translateY(2px); box-shadow: none; }

/* ── LEDs ─────────────────────────────────────────────────────────────── */
.dds4-led {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--led-off); flex: none; transition: background var(--t-quick), box-shadow var(--t-quick);
}
.dds4-led--lg { width: 12px; height: 12px; }
.dds4-led.is-on, .dds4-led.is-busy { background: var(--accent); box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 70%, transparent); animation: dds4-pop var(--t-normal) var(--spring-strong); }
.dds4-led.is-ok    { background: var(--led-ok-glow); box-shadow: 0 0 8px rgba(123, 195, 78, .7); animation: dds4-pop var(--t-normal) var(--spring-strong); }
.dds4-led.is-warn  { background: var(--led-warn);    box-shadow: 0 0 8px rgba(224, 161, 0, .7); }
.dds4-led.is-error { background: var(--led-error);   box-shadow: 0 0 8px rgba(210, 60, 44, .7); }
.dds4-led.is-busy  { animation: dds4-blink 320ms ease-in-out infinite alternate; }
@keyframes dds4-pop { from { transform: scale(2); } to { transform: scale(1); } }
@keyframes dds4-blink { from { opacity: .35; } to { opacity: 1; } }

.dds4-chase { display: flex; gap: 10px; }
.dds4-chase i { width: 8px; height: 8px; border-radius: 50%; background: var(--led-off); }
.dds4-chase.is-active i { animation: dds4-chase 900ms linear infinite; animation-delay: calc(var(--i) * 56ms); }
.dds4-chase.is-done i { animation: dds4-flash 1100ms steps(1) 1; }
@keyframes dds4-chase {
  0%   { background: var(--accent); box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 70%, transparent); }
  30%  { background: color-mix(in srgb, var(--accent) 25%, var(--led-off)); box-shadow: none; }
  100% { background: var(--led-off); }
}
@keyframes dds4-flash { 0%,34%,67% { background: var(--led-ok-glow); box-shadow: 0 0 8px rgba(123,195,78,.7); } 17%,50%,84% { background: var(--led-off); } }

/* ── LCD ──────────────────────────────────────────────────────────────── */
.dds4-lcd {
  position: relative; overflow: hidden; background: var(--lcd-glass); color: var(--lcd-text);
  border-radius: var(--r-panel); padding: 16px 20px 18px; box-shadow: 0 2px 8px rgba(0, 0, 0, .5);
  font-family: var(--mono);
}
.dds4-lcd::after {
  content: ''; position: absolute; left: 0; right: 0; top: -26px; height: 26px; pointer-events: none;
  background: linear-gradient(rgba(242,179,61,0), rgba(242,179,61,.08), rgba(242,179,61,0));
  animation: dds4-scan 3200ms linear infinite;
}
@keyframes dds4-scan { to { top: 100%; } }
.dds4-lcd.is-flicker > * { animation: dds4-flicker 550ms steps(6) 1; }
@keyframes dds4-flicker { 0% { opacity: 0; } 17% { opacity: .8; } 33% { opacity: .2; } 50% { opacity: 1; } 67% { opacity: .4; } 100% { opacity: 1; } }
.dds4-lcd-label { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 12px;
  font: 400 11px/1.3 var(--mono); letter-spacing: 1.3px; text-transform: uppercase; color: var(--lcd-label); }
.dds4-lcd-text { font: 400 26px/1.25 var(--mono); color: var(--lcd-text); text-shadow: 0 0 12px rgba(242, 179, 61, .4); word-break: break-all; }
.dds4-lcd-text.is-sm { font-size: 15px; }
.dds4-lcd-dim { color: var(--lcd-dim); }
.dds4-lcd-ok  { color: var(--lcd-ok); text-shadow: 0 0 12px rgba(123, 195, 78, .4); }
.dds4-caret { animation: dds4-caret 1s steps(1) infinite; }
@keyframes dds4-caret { 50% { opacity: 0; } }
.dds4-segs { display: flex; gap: 3px; }
.dds4-segs i { flex: 1; height: 14px; border-radius: var(--r-seg); background: var(--lcd-off); transition: background var(--t-quick), box-shadow var(--t-quick); }
.dds4-segs i.on { background: var(--lcd-text); box-shadow: 0 0 6px rgba(242, 179, 61, .55); }
.dds4-segs.is-done i.on { background: var(--lcd-ok); box-shadow: 0 0 6px rgba(123, 195, 78, .55); }

/* ── Segmented ────────────────────────────────────────────────────────── */
.dds4-seg { position: relative; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 4px;
  padding: 4px; background: var(--well); border-radius: var(--r-field); }
.dds4-seg--v { grid-auto-flow: row; }
.dds4-seg button { position: relative; z-index: 1; appearance: none; border: 0; background: none; cursor: pointer;
  height: 38px; font: 400 13px/1 var(--mono); color: var(--text); transition: color var(--t-normal); white-space: nowrap; }
.dds4-seg button[aria-pressed="true"] { color: var(--body); }
.dds4-seg .dds4-seg-ind { position: absolute; z-index: 0; border-radius: 9px; background: var(--text);
  box-shadow: 0 2px 6px rgba(0, 0, 0, .25); transition: all 450ms var(--spring); }

/* ── Toggle ───────────────────────────────────────────────────────────── */
.dds4-toggle { appearance: none; border: 0; cursor: pointer; width: 56px; height: 32px; padding: 3px; flex: none;
  border-radius: 16px; background: var(--led-off); box-shadow: 0 1px 4px rgba(40, 36, 30, .25);
  transition: background var(--t-normal); position: relative; }
.dds4-toggle::after { content: ''; position: absolute; top: 3px; left: 3px; width: 26px; height: 26px; border-radius: 50%;
  background: #F7F6F2; box-shadow: 0 2px 4px rgba(0, 0, 0, .25); transition: transform 420ms var(--spring-strong); }
.dds4-toggle[aria-checked="true"] { background: var(--accent); }
.dds4-toggle[aria-checked="true"]::after { transform: translateX(24px); }
.dds4-togglerow { display: flex; align-items: center; gap: 12px; padding: 12px 16px; }
.dds4-togglerow > div { flex: 1; }
.dds4-togglerow .dds4-heading { font-size: 15px; }

/* ── Checkbox & radio — small keys ────────────────────────────────────── */
.dds4-check, .dds4-radio { appearance: none; margin: 0; cursor: pointer; flex: none; width: 24px; height: 24px;
  background: var(--key); border-radius: 7px; box-shadow: 0 2px 0 var(--key-edge);
  display: inline-grid; place-content: center; transition: transform var(--t-press), box-shadow var(--t-press), background var(--t-quick); }
.dds4-radio { border-radius: 50%; }
.dds4-check:checked, .dds4-radio:checked { transform: translateY(2px); box-shadow: inset 0 1px 3px var(--well-shadow); background: var(--well); }
.dds4-check::before { content: ''; width: 12px; height: 7px; border: solid var(--accent); border-width: 0 0 2.5px 2.5px;
  transform: rotate(-45deg) scale(0); margin-top: -3px; transition: transform var(--t-normal) var(--spring-strong); }
.dds4-check:checked::before { transform: rotate(-45deg) scale(1); }
.dds4-radio::before { content: ''; width: 10px; height: 10px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 6px color-mix(in srgb, var(--accent) 60%, transparent); transform: scale(0); transition: transform var(--t-normal) var(--spring-strong); }
.dds4-radio:checked::before { transform: scale(1); }
.dds4-choice { display: flex; align-items: center; gap: 10px; font: 500 14px/1.3 var(--sans); cursor: pointer; }

/* ── Fields ───────────────────────────────────────────────────────────── */
.dds4-field { width: 100%; box-sizing: border-box; border: 0; outline: 0; background: var(--well); color: var(--text);
  font: 400 15px/1.4 var(--sans); padding: 14px; border-radius: var(--r-field);
  box-shadow: inset 0 2px 5px var(--well-shadow); transition: box-shadow var(--t-quick); }
.dds4-field::placeholder { color: var(--text-3); }
.dds4-field:focus { box-shadow: inset 0 2px 5px var(--well-shadow), 0 0 0 2px var(--accent); }
.dds4-field.is-mono { font-family: var(--mono); font-size: 14px; }
textarea.dds4-field { resize: vertical; min-height: 96px; }
.dds4-field.is-error { box-shadow: inset 0 2px 5px var(--well-shadow), 0 0 0 2px var(--led-error); }
.dds4-fieldnote { font: 400 11px/1.3 var(--mono); letter-spacing: 1.3px; text-transform: uppercase; color: var(--text-3); margin-top: 6px; }
.dds4-fieldnote.is-error { color: var(--led-error); }
.dds4-search { position: relative; }
.dds4-search svg { position: absolute; left: 14px; top: 50%; translate: 0 -50%; width: 18px; height: 18px; stroke: var(--text-3); fill: none; stroke-width: 2; }
.dds4-search .dds4-field { padding-left: 42px; }
.dds4-copyfield { display: flex; gap: 8px; align-items: stretch; }
.dds4-copyfield .dds4-field { flex: 1; }

/* ── Slider & fader ───────────────────────────────────────────────────── */
.dds4-slider { display: grid; gap: 4px; }
.dds4-slider input[type=range] { appearance: none; width: 100%; height: 32px; background: none; margin: 0; cursor: pointer;
  --pct: 50%; }
.dds4-slider input[type=range]::-webkit-slider-runnable-track { height: 4px; border-radius: 2px;
  background: linear-gradient(to right, var(--accent) var(--pct), var(--hairline) var(--pct)); }
.dds4-slider input[type=range]::-moz-range-track { height: 4px; border-radius: 2px; background: var(--hairline); }
.dds4-slider input[type=range]::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--accent); }
.dds4-slider input[type=range]::-webkit-slider-thumb { appearance: none; width: 20px; height: 20px; margin-top: -8px; border-radius: 50%;
  background: var(--key); box-shadow: 0 2px 0 var(--key-edge), 0 2px 6px var(--key-drop); }
.dds4-slider input[type=range]::-moz-range-thumb { width: 20px; height: 20px; border: 0; border-radius: 50%;
  background: var(--key); box-shadow: 0 2px 0 var(--key-edge), 0 2px 6px var(--key-drop); }
.dds4-slider output { font: 400 13px/1 var(--mono); color: var(--text); }

.dds4-fader { display: grid; justify-items: center; gap: 8px; width: 56px; }
.dds4-fader-track { position: relative; width: 8px; height: 160px; border-radius: 4px; background: var(--well);
  box-shadow: inset 0 1px 3px var(--well-shadow); cursor: ns-resize; touch-action: none; }
.dds4-fader-fill { position: absolute; left: 0; right: 0; bottom: 0; border-radius: 4px; background: var(--accent); }
.dds4-fader-cap { position: absolute; left: 50%; width: 40px; height: 22px; translate: -50% 50%; border-radius: 6px;
  background: var(--key); box-shadow: 0 3px 0 var(--key-edge), 0 4px 8px var(--key-drop);
  background-image: linear-gradient(var(--text-3), var(--text-3)); background-size: 24px 2px; background-repeat: no-repeat; background-position: center; }
.dds4-fader-ticks { position: absolute; left: -14px; top: 0; bottom: 0; width: 6px;
  background: repeating-linear-gradient(to bottom, var(--hairline) 0 1.5px, transparent 1.5px 16px); }

/* ── Stepper ──────────────────────────────────────────────────────────── */
.dds4-stepper { display: inline-flex; align-items: center; gap: 4px; padding: 4px; background: var(--well);
  border-radius: 22px; box-shadow: inset 0 1px 3px var(--well-shadow); }
.dds4-stepper output { min-width: 56px; text-align: center; font: 400 16px/1 var(--mono); }

/* ── Dial ─────────────────────────────────────────────────────────────── */
.dds4-dial { display: inline-grid; justify-items: center; gap: 6px; padding: 14px 14px 12px; }
.dds4-dial svg { width: 104px; height: 104px; cursor: grab; touch-action: none; }
.dds4-dial-row { display: flex; align-items: center; }
.dds4-dial-row output { width: 54px; text-align: center; font: 400 16px/1 var(--mono); }

/* ── Grille ───────────────────────────────────────────────────────────── */
.dds4-grille { display: grid; grid-template-columns: repeat(var(--cols, 12), 1fr); gap: 0; padding: 18px; border-radius: var(--r-grille); }
.dds4-grille i { aspect-ratio: 1; display: grid; place-items: center; }
.dds4-grille i::before { content: ''; width: 46%; aspect-ratio: 1; border-radius: 50%; background: var(--grille-dot);
  animation: dds4-breathe 2.4s ease-in-out infinite; animation-delay: calc(var(--d) * -1s); }
.dds4-grille.is-working i::before { animation: dds4-work 1s ease-in-out infinite; animation-delay: calc(var(--d) * -.38s); }
.dds4-grille.is-done i::before { animation: dds4-burst 1.2s ease-out 1 both; animation-delay: calc(var(--r) * .5s); }
.dds4-grille.is-error i::before { animation: dds4-burst-err 1.2s ease-out 1 both; animation-delay: calc(var(--r) * .5s); }
@keyframes dds4-breathe { 50% { transform: scale(.72); } }
@keyframes dds4-work { 0%,100% { transform: scale(.55); background: var(--grille-dot); }
  50% { transform: scale(1.3); background: var(--accent); box-shadow: 0 0 6px color-mix(in srgb, var(--accent) 50%, transparent); } }
@keyframes dds4-burst { 40% { transform: scale(1.6); background: var(--led-ok-glow); box-shadow: 0 0 6px rgba(123,195,78,.5); } }
@keyframes dds4-burst-err { 40% { transform: scale(1.6); background: var(--led-error); box-shadow: 0 0 6px rgba(210,60,44,.5); } }

/* ── File input & tray ────────────────────────────────────────────────── */
.dds4-drop { text-align: center; padding: 26px 20px; background: var(--well); border-radius: var(--r-grille);
  border: 1.5px solid var(--hairline); transition: background var(--t-normal), border-color var(--t-normal); }
.dds4-drop:hover, .dds4-drop.is-over { background: color-mix(in srgb, var(--well) 94%, var(--accent)); border-color: color-mix(in srgb, var(--accent) 60%, transparent); }
.dds4-drop.is-over { border: 3px solid var(--accent); }
.dds4-fan { position: relative; width: 120px; height: 62px; margin: 0 auto 14px; }
.dds4-fan i { position: absolute; bottom: 0; left: 40px; width: 40px; height: 52px; border-radius: 7px; background: var(--key);
  box-shadow: 0 2px 0 var(--key-edge); transform-origin: bottom center; transition: transform var(--t-slow) var(--spring); }
.dds4-fan i:nth-child(1) { transform: translateX(-18px) rotate(-12.6deg); }
.dds4-fan i:nth-child(2) { transform: translateX(18px) rotate(12.6deg); }
.dds4-fan i:nth-child(3) { background: var(--accent); }
.dds4-drop:hover .dds4-fan i:nth-child(1) { transform: translate(-29px, -6px) rotate(-20deg); }
.dds4-drop:hover .dds4-fan i:nth-child(2) { transform: translate(29px, -6px) rotate(20deg); }
.dds4-drop:hover .dds4-fan i:nth-child(3) { transform: translateY(-6px); }
.dds4-drop .dds4-heading { margin: 0 0 4px; }
.dds4-drop .dds4-body-sm { margin: 0 0 16px; }

.dds4-tray { position: relative; }
.dds4-tray-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; margin-top: 10px; }
.dds4-card { background: var(--key); border-radius: var(--r-card); padding: 10px; border: 2px solid transparent;
  box-shadow: 0 2px 0 var(--key-edge); animation: dds4-flyin 750ms cubic-bezier(.2,.9,.25,1.15) both; animation-delay: calc(var(--i, 0) * 90ms); }
.dds4-card.is-working { border-color: var(--accent); }
.dds4-card-top { display: flex; align-items: center; gap: 8px; }
.dds4-card-top .dds4-mono { flex: 1; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dds4-thumb { width: 28px; height: 28px; border-radius: var(--r-thumb); flex: none; background: linear-gradient(135deg, var(--accent), var(--accent-edge)); }
.dds4-bar { height: 4px; border-radius: 2px; background: var(--well); margin: 10px 0 6px; overflow: hidden; }
.dds4-bar b { display: block; height: 100%; width: var(--p, 0%); background: var(--accent); transition: width var(--t-normal) ease-out; }
.dds4-card.is-done .dds4-bar b { background: var(--led-ok); width: 100%; }
.dds4-card.is-error .dds4-bar b { background: var(--led-error); }
.dds4-card.is-error .dds4-label { color: var(--led-error); }
.dds4-status-ok, .dds4-status-err { width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center; color: #fff;
  font: 700 11px/1 var(--sans); animation: dds4-popspin 500ms var(--spring-strong) both; }
.dds4-status-ok { background: var(--led-ok); }
.dds4-status-err { background: var(--led-error); }
@keyframes dds4-popspin { from { transform: rotate(-40deg) scale(0); } }
@keyframes dds4-flyin { from { opacity: 0; transform: translate(-120px, -60px) rotate(-14deg) scale(.7); } }
.dds4-stamp { position: absolute; right: 18px; top: -16px; padding: 6px 12px; border: 2.5px solid var(--accent); border-radius: 8px;
  color: var(--accent); background: var(--body); font: 700 13px/1 var(--mono); letter-spacing: 2px; text-transform: uppercase;
  transform: rotate(-10deg); animation: dds4-stamp 600ms cubic-bezier(.2,1.2,.4,1) both; }
@keyframes dds4-stamp { from { opacity: 0; transform: rotate(-24deg) scale(2.6); } }

/* ── Tabs & chips ─────────────────────────────────────────────────────── */
.dds4-tabs { display: flex; gap: 6px; padding: 4px; background: var(--well); border-radius: var(--r-field); overflow-x: auto; }
.dds4-tab { appearance: none; border: 0; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
  padding: 8px 12px; border-radius: 9px; background: transparent; color: var(--text-2); font: 400 12px/1 var(--mono); }
.dds4-tab[aria-selected="true"] { background: var(--key); color: var(--text); box-shadow: 0 2px 0 var(--key-edge); }
.dds4-tab .x { opacity: .5; }
.dds4-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 8px; background: var(--key);
  font: 400 12px/1 var(--mono); color: var(--text); box-shadow: 0 2px 0 var(--key-edge); }
.dds4-chip.is-on { background: var(--accent); color: var(--on-accent); box-shadow: 0 2px 0 var(--accent-edge); }
.dds4-iconchip { width: 24px; height: 24px; border-radius: var(--r-chip); display: grid; place-items: center; flex: none;
  background: color-mix(in srgb, var(--accent) 13%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent); color: var(--accent); }
.dds4-iconchip svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; }
.dds4-letter { width: 24px; height: 24px; border-radius: var(--r-chip); display: grid; place-items: center;
  background: var(--accent); color: var(--on-accent); font: 400 12px/1 var(--mono); }
.dds4-badge { min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; background: var(--accent); color: var(--on-accent);
  display: inline-grid; place-items: center; font: 700 10px/1 var(--mono); }
.dds4-kbd { display: inline-block; padding: 3px 7px; border-radius: 6px; background: var(--key); box-shadow: 0 2px 0 var(--key-edge);
  font: 400 11px/1.2 var(--mono); color: var(--text-2); }

/* ── Toast, tooltip, dialog ───────────────────────────────────────────── */
.dds4-toast { display: inline-flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: var(--r-field);
  background: var(--lcd-glass); color: var(--lcd-text); font: 400 14px/1.3 var(--mono); box-shadow: 0 8px 24px rgba(0,0,0,.35);
  animation: dds4-toast 420ms var(--spring) both; }
@keyframes dds4-toast { from { opacity: 0; transform: translateY(16px) scale(.96); } }
.dds4-tip { display: inline-block; padding: 6px 10px; border-radius: var(--r-tip); background: var(--lcd-glass);
  color: var(--lcd-text); font: 400 11px/1.3 var(--mono); letter-spacing: 1.3px; text-transform: uppercase; }
.dds4-scrim { background: rgba(17, 17, 16, .45); backdrop-filter: blur(2px); border-radius: var(--r-unit); padding: 28px; display: grid; place-items: center; }
.dds4-dialog { max-width: 380px; width: 100%; animation: dds4-dialog 420ms var(--spring) both; }
@keyframes dds4-dialog { from { opacity: 0; transform: translateY(24px) scale(.94); } }
.dds4-dialog-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; flex-wrap: wrap; }

/* ── Meters ───────────────────────────────────────────────────────────── */
.dds4-meter { height: 8px; border-radius: 4px; background: var(--well); box-shadow: inset 0 1px 2px var(--well-shadow); overflow: hidden; }
.dds4-meter b { display: block; height: 100%; width: var(--p); border-radius: 4px; background: var(--accent); transition: width var(--t-slow) var(--out); }
.dds4-battery { display: inline-flex; align-items: center; }
.dds4-battery-body { display: flex; gap: 3px; padding: 4px; width: 92px; height: 34px; box-sizing: border-box; border-radius: 8px;
  background: var(--lcd-glass); border: 1.5px solid #4A4943; box-shadow: 0 2px 6px rgba(0,0,0,.4); }
.dds4-battery-body i { flex: 1; border-radius: 2px; background: var(--lcd-off); }
.dds4-battery-body i.on { background: var(--led-ok-glow); box-shadow: 0 0 6px rgba(123,195,78,.45); }
.dds4-battery.is-low .dds4-battery-body i.on { background: var(--led-error); box-shadow: 0 0 6px rgba(210,60,44,.45); }
.dds4-battery-tip { width: 4px; height: 12px; border-radius: 0 2px 2px 0; background: #4A4943; }
.dds4-vu { display: flex; align-items: flex-end; gap: 3px; height: 64px; }
.dds4-vu i { width: 8px; border-radius: 2px; background: linear-gradient(to top, var(--led-ok-glow) 0 60%, var(--led-warn) 60% 85%, var(--led-error) 85%);
  height: 100%; clip-path: inset(calc(100% - var(--h, 20%)) 0 0 0); transition: clip-path 90ms linear; }
.dds4-ring { --p: 60; width: 72px; height: 72px; border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--accent) calc(var(--p) * 1%), var(--well) 0); }
.dds4-ring::before { content: attr(data-v); width: 56px; height: 56px; border-radius: 50%; background: var(--key); display: grid; place-items: center;
  font: 400 14px/1 var(--mono); box-shadow: 0 2px 0 var(--key-edge); }

/* ── Home widget chrome ───────────────────────────────────────────────── */
.dds4-widget { display: grid; grid-template-rows: 30px repeat(4, 28px); row-gap: 0; }
.dds4-widget-hd { display: flex; align-items: center; gap: 9px; margin-bottom: 4px; }
.dds4-widget-hd .dds4-label { flex: 1; color: var(--text); }
.dds4-widget-hd .age { font: 400 11px/1 var(--mono); color: var(--text-3); }
.dds4-row { display: flex; align-items: center; gap: 10px; font: 500 14px/1 var(--sans); }
.dds4-row .k { flex: 1; color: var(--text-2); }
.dds4-row .v { font-family: var(--mono); color: var(--text); }

/* ── Tool keypad ──────────────────────────────────────────────────────── */
.dds4-keypad { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.dds4-toolkey { display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 12px; text-align: left;
  justify-content: stretch; align-items: start; padding: 16px; }
.dds4-toolkey svg { grid-row: span 2; width: 24px; height: 24px; transition: color var(--t-quick); }
.dds4-toolkey:hover svg { color: var(--accent); }
.dds4-toolkey .code { position: absolute; right: 12px; top: 12px; }
.dds4-toolkey { position: relative; }

/* ── Odometer ─────────────────────────────────────────────────────────── */
.dds4-odo { display: inline-flex; font-family: var(--mono); overflow: hidden; height: 1.3em; line-height: 1.3em; }
.dds4-odo span { display: inline-block; }
.dds4-odo .col { display: flex; flex-direction: column; transition: transform 700ms var(--out); }

/* ── Empty state ──────────────────────────────────────────────────────── */
.dds4-empty { text-align: center; padding: 18px; color: var(--text-3); font: 500 13px/1.4 var(--sans); }

/* ── Reduce motion: every animation and spring collapses ──────────────── */
@media (prefers-reduced-motion: reduce) {
  .dds4 *, .dds4 *::before, .dds4 *::after { animation: none !important; transition: none !important; }
  .dds4-lcd::after { display: none; }
}