/* ============================================================================
 * Kudbee Controls — shared, zero-build control styling.
 * Reuses each page's palette vars (--grad / --cyan / --accent / --accent-glow /
 * --bg-elevated / --text-primary / --border). Drop-in: add class="kbd-slider"
 * to an <input type="range">, wrap it in <span class="kbd-field">, and load
 * kbd-controls.js to get the gradient fill, value bubble, and "throb" glow.
 * ========================================================================== */

.kbd-field { position: relative; display: flex; align-items: center; }
.kbd-field > .kbd-slider { flex: 1 1 auto; }

/* ----- Track + gradient fill (fills cyan→accent up to --val, set by JS) ----- */
.kbd-slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; border-radius: 999px; outline: none; cursor: pointer;
  background-color: rgba(255, 255, 255, 0.14);
  background-image: var(--grad, linear-gradient(90deg, #39e6ff, #6f5bff));
  background-repeat: no-repeat;
  background-size: var(--val, 0%) 100%;
  transition: background-size 0.08s linear;
  --kbd-ring: rgba(57, 230, 255, 0.25);
  --kbd-ring-soft: rgba(57, 230, 255, 0.12);
}
/* A larger invisible hit area for comfortable touch without a fat visual track. */
.kbd-slider { padding: 11px 0; background-clip: content-box; }

/* ----- Thumb (WebKit) ----- */
.kbd-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%; background: #fff; cursor: pointer; border: none;
  box-shadow: 0 0 0 4px var(--kbd-ring), 0 2px 8px rgba(0, 0, 0, 0.5);
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.kbd-slider:hover::-webkit-slider-thumb { box-shadow: 0 0 0 5px var(--kbd-ring), 0 0 14px 3px var(--accent-glow, rgba(111,91,255,0.4)); }
.kbd-slider:active::-webkit-slider-thumb,
.kbd-slider.dragging::-webkit-slider-thumb { transform: scale(1.14); }

/* ----- Thumb + native progress (Firefox) ----- */
.kbd-slider::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%; background: #fff; border: none; cursor: pointer;
  box-shadow: 0 0 0 4px var(--kbd-ring), 0 2px 8px rgba(0, 0, 0, 0.5);
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.kbd-slider:active::-moz-range-thumb, .kbd-slider.dragging::-moz-range-thumb { transform: scale(1.14); }
.kbd-slider::-moz-range-track { height: 6px; border-radius: 999px; background: transparent; }

/* ----- Focus ring (with a plain :focus fallback for older WebKit) ----- */
.kbd-slider:focus::-webkit-slider-thumb,
.kbd-slider:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 5px var(--kbd-ring), 0 0 0 2px var(--accent, #6f5bff), 0 0 16px 4px var(--accent-glow, rgba(111,91,255,0.45)); }
.kbd-slider:focus::-moz-range-thumb,
.kbd-slider:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 5px var(--kbd-ring), 0 0 0 2px var(--accent, #6f5bff); }

/* ----- "Throb" — a gentle breathing glow while focused or dragging ----- */
@media (prefers-reduced-motion: no-preference) {
  .kbd-slider:focus-visible::-webkit-slider-thumb,
  .kbd-slider.dragging::-webkit-slider-thumb { animation: kbdThrob 1.5s ease-in-out infinite; }
  .kbd-slider:focus-visible::-moz-range-thumb,
  .kbd-slider.dragging::-moz-range-thumb { animation: kbdThrob 1.5s ease-in-out infinite; }
  /* A faint gradient sheen travelling along the fill — only while actively dragging. */
  .kbd-slider.dragging { background-image: var(--grad, linear-gradient(90deg, #39e6ff, #6f5bff)), linear-gradient(90deg, transparent, rgba(255,255,255,0.55), transparent); background-size: var(--val, 0%) 100%, 60px 100%; background-position: 0 0, -60px 0; animation: kbdSheen 1.4s linear infinite; }
}
@keyframes kbdThrob {
  0%, 100% { box-shadow: 0 0 0 4px var(--kbd-ring), 0 0 10px 2px var(--accent-glow, rgba(111,91,255,0.4)); }
  50%      { box-shadow: 0 0 0 7px var(--kbd-ring-soft), 0 0 22px 6px var(--accent-glow, rgba(111,91,255,0.4)); }
}
@keyframes kbdSheen {
  from { background-position: 0 0, -60px 0; }
  to   { background-position: 0 0, calc(var(--val, 0%) + 60px) 0; }
}

/* ----- Live value bubble (positioned + filled by JS) ----- */
.kbd-bubble {
  position: absolute; bottom: calc(100% + 6px); left: 0; transform: translateX(-50%);
  padding: 3px 8px; border-radius: 7px; font-size: 11px; font-weight: 600; line-height: 1.2;
  background: var(--bg-elevated, #0b0b16); color: var(--text-primary, #fff);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.14));
  box-shadow: 0 6px 18px -6px rgba(0, 0, 0, 0.6);
  white-space: nowrap; pointer-events: none; opacity: 0; transition: opacity 0.18s ease;
  font-variant-numeric: tabular-nums; z-index: 5;
}
.kbd-field:hover .kbd-bubble, .kbd-field.active .kbd-bubble, .kbd-slider:focus-visible ~ .kbd-bubble { opacity: 1; }
.kbd-bubble::after {
  content: ''; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  border: 4px solid transparent; border-top-color: var(--border, rgba(255, 255, 255, 0.14));
}

/* Reduced motion: no throb/sheen, no fill tween, no thumb transitions. */
@media (prefers-reduced-motion: reduce) {
  .kbd-slider, .kbd-slider::-webkit-slider-thumb, .kbd-slider::-moz-range-thumb { transition: none !important; animation: none !important; }
}

/* ============================================================================
 * .kbd-knob — circular drag-to-turn rotary control.
 * Markup:  <div class="kbd-knob" data-min="0" data-max="100" data-value="40"
 *               data-step="1" data-unit="%" data-dp="0" aria-label="Drive"></div>
 * JS (kbd-controls.js) enhances it into role="slider" with an SVG arc that fills
 * as you turn. Themeable via the same vars: --grad / --cyan / --accent /
 * --accent-glow. Pointer drag (vertical or angular), wheel, and keyboard.
 * ========================================================================== */
.kbd-knob {
  --kbd-knob-size: 96px;
  --kbd-ring: rgba(57, 230, 255, 0.25);
  --kbd-ring-soft: rgba(57, 230, 255, 0.12);
  position: relative; display: inline-grid; place-items: center;
  width: var(--kbd-knob-size); height: var(--kbd-knob-size);
  border-radius: 50%; outline: none; cursor: grab;
  touch-action: none; -webkit-user-select: none; user-select: none;
  color: var(--text-primary, #fff);
}
.kbd-knob.dragging { cursor: grabbing; }
/* The SVG arc + track live behind the centred readout. */
.kbd-knob__svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; overflow: visible; pointer-events: none; }
.kbd-knob__track { fill: none; stroke: rgba(255, 255, 255, 0.12); stroke-width: 7; stroke-linecap: round; }
.light .kbd-knob__track { stroke: rgba(15, 23, 42, 0.14); }
.kbd-knob__arc {
  fill: none; stroke: url(#kbdKnobGrad); stroke-width: 7; stroke-linecap: round;
  transition: stroke-dashoffset 0.08s linear;
}
/* The inset "cap" disc, with a pointer notch drawn by ::before. */
.kbd-knob__cap {
  position: relative; display: grid; place-items: center;
  width: calc(var(--kbd-knob-size) - 26px); height: calc(var(--kbd-knob-size) - 26px);
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 30%, rgba(255,255,255,0.10), transparent 60%),
    var(--bg-elevated, #0b0b16);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.12));
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.5), 0 4px 14px -6px rgba(0,0,0,0.6);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}
/* Pointer notch — rotates with --kbd-angle so the disc visibly "turns". */
.kbd-knob__cap::before {
  content: ''; position: absolute; top: 8px; left: 50%;
  width: 3px; height: 22%; border-radius: 999px;
  background: var(--cyan, #39e6ff);
  box-shadow: 0 0 8px 1px var(--accent-glow, rgba(111,91,255,0.45));
  transform-origin: 50% calc(var(--kbd-knob-size) / 2 - 9px);
  transform: translateX(-50%) rotate(var(--kbd-angle, 0deg));
  transition: transform 0.08s linear;
}
.kbd-knob__val { position: relative; z-index: 1; font-size: 18px; font-weight: 700; letter-spacing: -0.5px; font-variant-numeric: tabular-nums; line-height: 1; }
.kbd-knob__label { position: relative; z-index: 1; margin-top: 3px; font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dim, #646c82); font-weight: 600; }
.kbd-knob:hover .kbd-knob__cap { box-shadow: inset 0 2px 6px rgba(0,0,0,0.5), 0 0 16px 2px var(--accent-glow, rgba(111,91,255,0.4)); }
.kbd-knob:focus-visible { box-shadow: 0 0 0 3px var(--accent, #6f5bff), 0 0 18px 4px var(--accent-glow, rgba(111,91,255,0.45)); border-radius: 50%; }
.kbd-knob:focus-visible .kbd-knob__cap { transform: scale(1.03); }
.kbd-knob.dragging .kbd-knob__cap { transform: scale(1.04); }

@media (prefers-reduced-motion: no-preference) {
  .kbd-knob:focus-visible .kbd-knob__cap,
  .kbd-knob.dragging .kbd-knob__cap { animation: kbdThrob 1.5s ease-in-out infinite; }
}
@media (prefers-reduced-motion: reduce) {
  .kbd-knob__arc, .kbd-knob__cap, .kbd-knob__cap::before { transition: none !important; animation: none !important; }
}

/* ============================================================================
 * .kbd-stepper — number input flanked by −/+ buttons.
 * Markup:  <div class="kbd-stepper" data-min="0" data-max="100" data-step="1"
 *               data-value="20" data-unit="%" data-dp="0"
 *               data-label="Quantity"></div>
 * JS builds the −/+ buttons and input; pair with a slider/knob via a shared
 * data-kbd-name (see kbd-controls.js). Degrades to a labelled number input.
 * ========================================================================== */
.kbd-stepper {
  display: inline-flex; align-items: stretch;
  border: 1px solid var(--border, rgba(255, 255, 255, 0.12));
  border-radius: 11px; overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.light .kbd-stepper { background: var(--bg-elevated, #fff); }
.kbd-stepper:focus-within { border-color: var(--cyan, #39e6ff); box-shadow: 0 0 0 3px rgba(57, 230, 255, 0.14); }
.kbd-stepper__btn {
  flex: 0 0 auto; width: 40px; border: none; cursor: pointer;
  background: transparent; color: var(--text-secondary, #e6e8f0);
  font-size: 20px; font-weight: 600; line-height: 1; font-family: inherit;
  display: grid; place-items: center;
  transition: background 0.15s ease, color 0.15s ease;
}
.kbd-stepper__btn:hover:not(:disabled) { background: rgba(255, 255, 255, 0.07); color: var(--cyan, #39e6ff); }
.kbd-stepper__btn:active:not(:disabled) { background: rgba(255, 255, 255, 0.12); }
.kbd-stepper__btn:focus-visible { outline: 2px solid var(--accent, #6f5bff); outline-offset: -2px; }
.kbd-stepper__btn:disabled { opacity: 0.32; cursor: not-allowed; }
.kbd-stepper__input {
  flex: 1 1 auto; width: 64px; min-width: 0; text-align: center;
  border: none; outline: none; background: transparent;
  color: var(--text-primary, #fff); font-family: inherit; font-size: 14px; font-weight: 600;
  padding: 9px 4px; font-variant-numeric: tabular-nums;
  border-left: 1px solid var(--border, rgba(255,255,255,0.10));
  border-right: 1px solid var(--border, rgba(255,255,255,0.10));
}
.kbd-stepper__input::-webkit-outer-spin-button,
.kbd-stepper__input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
@media (prefers-reduced-motion: reduce) {
  .kbd-stepper, .kbd-stepper__btn { transition: none !important; }
}