:root {
  --color-bg: #f2ebd9;
  --color-surface: #3a3a3a;
  --color-surface-inset: #2e2e2e;
  --color-border: #1f1f1f;
  --color-border-light: #5c5c5c;
  --color-text: #1a1a1a;
  --color-text-on-dark: #f2ebd9;
  --color-muted-on-dark: #b8b0a0;
  --color-accent: #ff7a1a;
  --color-accent-muted: #d9620a;
  --color-grid-line: #d9d0bc;
  --font: "Silkscreen", "Courier New", monospace;
  --shadow: 4px 4px 0 #1f1f1f;
  --shadow-sm: 2px 2px 0 #1f1f1f;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: var(--color-text-on-dark);
  font-family: var(--font);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 12px,
    rgba(217, 208, 188, 0.35) 12px,
    rgba(217, 208, 188, 0.35) 13px
  );
}

.bar, .stage { position: relative; z-index: 1; }

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.75rem 1.25rem;
  background: var(--color-surface);
  border-bottom: 3px solid var(--color-border);
  box-shadow: var(--shadow);
}

.bar--done {
  background: var(--color-accent);
  color: var(--color-text);
}

.status {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.status:empty { display: none; }

.range-field {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1 1 18rem;
  min-width: 16rem;
}

.label {
  color: var(--color-muted-on-dark);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
}

.bar--done .label { color: var(--color-text); }

.range-num {
  width: 4.5ch;
  padding: 0.35rem 0.15rem;
  border: 3px solid var(--color-border);
  border-radius: 2px;
  background: var(--color-surface-inset);
  box-shadow: var(--shadow-sm);
  color: var(--color-accent);
  font-family: inherit;
  font-size: 16px;
  text-align: center;
}

.range-num:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 1px;
}

.bar--done .range-num {
  color: var(--color-text);
  background: var(--color-bg);
}

.track {
  position: relative;
  flex: 1;
  height: 2.25rem;
  background: var(--color-surface-inset);
  border: 3px solid var(--color-border);
  border-radius: 2px;
  box-shadow: inset 0 2px 0 var(--color-border-light), inset 0 -2px 0 var(--color-border);
  touch-action: none;
}

.fill {
  position: absolute;
  top: 0;
  bottom: 0;
  background: var(--color-accent);
}

.bar--done .fill { background: var(--color-text); }

.thumb {
  position: absolute;
  top: 50%;
  width: 16px;
  height: 1.6rem;
  padding: 0;
  transform: translate(-50%, -50%);
  border: 3px solid var(--color-border);
  border-radius: 2px;
  background: var(--color-accent);
  box-shadow: var(--shadow-sm);
  cursor: grab;
}

.thumb:active { cursor: grabbing; }
#thumb-low { z-index: 2; }
#thumb-high { z-index: 3; }

.actions {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}

button {
  font-family: inherit;
  color: var(--color-text-on-dark);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 13px;
}

.actions button {
  height: 2.75rem;
  padding: 0 0.8rem;
  border: 3px solid var(--color-border);
  border-radius: 2px;
  background: var(--color-surface-inset);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.actions button:hover { border-color: var(--color-accent); color: var(--color-accent); }

.actions button:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.actions button:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
  box-shadow: var(--shadow-sm);
  color: var(--color-text-on-dark);
  border-color: var(--color-border);
}

.thumb:focus-visible,
.actions button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 1px;
}

.bar--done .actions button:focus-visible { outline-color: var(--color-text); }

.stage {
  flex: 1;
  width: 100%;
  min-height: 0;
  display: block;
  touch-action: none;
}