/* ========================================
   CSS Variables / Design Tokens
   ======================================== */
:root {
  --accent: #1F77B4;
  --text: #0f172a;
  --muted: #6b7280;
  --panel: #ffffff;
  --panel-border: #e5e7eb;
  --shadow: 0 12px 36px rgba(15, 23, 42, 0.12);

  /* Control-specific colors */
  --track-bg: #d8dce3;
  --track-fill: var(--accent);
  --thumb-bg: #ffffff;
  --thumb-border: var(--accent);
  --button-border: #1F77B4;
  --button-hover: #566573;
  --toggle-bg-active: rgba(31, 119, 180, 0.2);
  --error-color: #900C3F;
  --error-bg: #900C3F;
}

/* Dark mode color overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --text: #e2e8f0;
    --muted: #94a3b8;
    --panel: #1e293b;
    --panel-border: #334155;
    --track-bg: #475569;
    --thumb-bg: #1e293b;
    --button-border: #60a5fa;
    --button-hover: #93c5fd;
    --toggle-bg-active: rgba(96, 165, 250, 0.3);
    --error-color: #f87171;
    --error-bg: #450a0a;
  }
}

/* ========================================
   Control Panel Container
   ======================================== */
.control-panel {
  position: absolute;
  top: 0px;
  left: 10px;
  width: 100%;
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: flex-start;
}

/* Layout variants */
.control-panel--horizontal {
  flex-direction: row;
}

.control-panel--vertical {
  flex-direction: column;
  align-items: stretch;
}

.control-panel--grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

/* ========================================
   Slider Component
   ======================================== */
.control-slider {
  display: grid;
  gap: 6px;
  min-width: 140px;
}

.control-slider__label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 14px;
  color: var(--muted);
}

.control-slider__value {
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.control-slider__input {
  --percent: 0%;
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--track-fill) 0%,
    var(--track-fill) var(--percent),
    var(--track-bg) var(--percent),
    var(--track-bg) 100%
  );
  outline: none;
  cursor: pointer;
}

/* Keyboard focus style for slider */
.control-slider__input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Remove focus styling when showFocus is disabled */
.control-slider.control--no-focus .control-slider__input:focus {
  outline: none;
}

/* Disabled state for slider */
.control-slider__input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Error state for slider */
.control-slider--error .control-slider__input {
  border: 2px solid var(--error-color);
}

.control-slider--error .control-slider__label {
  color: var(--error-color);
}

/* Webkit/Blink slider thumb */
.control-slider__input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--thumb-bg);
  border: 2px solid var(--thumb-border);
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.15);
}

/* Firefox slider thumb */
.control-slider__input::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--thumb-bg);
  border: 2px solid var(--thumb-border);
  box-shadow: 0 4px 8px rgba(15, 23, 42, 0.15);
}

/* ========================================
   Toggle Component
   ======================================== */
.control-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  min-width: 120px;
}

.control-toggle__label {
  font-size: 14px;
}

.control-toggle__switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 46px;
  height: 15px;
}

.control-toggle__input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.control-toggle__track {
  width: 100%;
  height: 100%;
  background: var(--track-bg);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  padding: 4px;
  transition: background 160ms ease;
}

.control-toggle__thumb {
  width: 15px;
  height: 15px;
  background: var(--thumb-bg);
  border-radius: 50%;
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.18);
  transform: translateX(0);
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

/* Checked state */
.control-toggle__input:checked + .control-toggle__track {
  background: var(--toggle-bg-active);
}

.control-toggle__input:checked + .control-toggle__track .control-toggle__thumb {
  transform: translateX(22px);
  background: var(--accent);
  box-shadow: 0 3px 12px rgba(31, 119, 180, 0.35);
}

/* Keyboard focus style for toggle */
.control-toggle__input:focus + .control-toggle__track {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Remove focus styling when showFocus is disabled */
.control-toggle.control--no-focus .control-toggle__input:focus + .control-toggle__track {
  outline: none;
}

/* Disabled state for toggle */
.control-toggle__input:disabled + .control-toggle__track {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Error state for toggle */
.control-toggle--error .control-toggle__label {
  color: var(--error-color);
}

.control-toggle--error .control-toggle__track {
  border: 2px solid var(--error-color);
}

/* ========================================
   Button Component
   ======================================== */
.control-button {
  border: 2px solid var(--button-border);
  color: var(--button-border);
  padding: 5px 10px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  background-color: transparent;
  font-family: 'EB Garamond', Georgia, serif;
  letter-spacing: 0.25em;
  cursor: pointer;
}

.control-button:hover {
  color: var(--button-hover);
  border: 2px solid var(--button-hover);
}

.control-button:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Remove focus styling when showFocus is disabled */
.control-button.control--no-focus:focus {
  outline: none;
}

.control-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transition: opacity 200ms ease;
}

/* Error state for button */
.control-button--error {
  border-color: var(--error-color);
  color: var(--error-color);
}

.control-button--error:hover {
  border-color: var(--error-color);
  color: var(--error-color);
}

/* Stretch buttons in vertical control panels */
.control-panel--vertical .control-button {
  width: 100%;
  min-width: max-content;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

/* ========================================
   Mobile / Touch Device Optimizations
   ======================================== */
@media (pointer: coarse) {
  /* Larger slider thumb for touch */
  .control-slider__input::-webkit-slider-thumb {
    width: 20px;
    height: 20px;
  }

  .control-slider__input::-moz-range-thumb {
    width: 20px;
    height: 20px;
  }

  /* Larger toggle for touch */
  .control-toggle__switch {
    width: 54px;
    height: 24px;
  }

  .control-toggle__thumb {
    width: 20px;
    height: 20px;
  }

  .control-toggle__input:checked + .control-toggle__track .control-toggle__thumb {
    transform: translateX(26px);
  }

  /* Larger buttons for touch */
  .control-button {
    padding: 10px 16px;
    font-size: 18px;
  }
}