/* ============================================================
   .uk-stepper — unified canonical numeric stepper (loaded only on /docs/ui-kit)
   ============================================================
   Replaces two near-identical declarations on /pricing:
     .pages-stepper + .stepper-btn + .stepper-value + .stepper-value.pulse
        (read-only display flavor)
     .notifications-stepper + .stepper-btn + .stepper-input
        (editable input flavor)

   Distinct from .uk-input-number (Forms) — that's a number input with hold-
   to-repeat chevrons baked INTO the field. The stepper is a separate-element
   row: a minus button, a value display, a plus button — all visible siblings.

   Slots:
     .uk-stepper                  flex row, owns the layout
       .uk-stepper-btn            − or + button (use data-action="dec"|"inc"
                                    when opting into the auto-wired JS; or
                                    leave plain for consumer JS)
       .uk-stepper-value          read-only display variant (a <div>),
                                    supports a pulse-on-change animation when
                                    .is-pulsing is added by JS
       .uk-stepper-input          editable variant (an <input type="number">)

   Sizes — driven by --stepper-size, no per-size duplication:
     --sm        36px square
     default     48px square (matches the production /pricing stepper)
     --lg        56px square

   JS contract (public/js/uk-stepper.js):
     - Auto-wiring is OPT-IN. Add data-stepper-auto="true" to the root and the
       JS will: read min/max/step from the inner <input>, or from data-min /
       data-max / data-step / data-value on the root for the read-only flavor;
       wire clicks on .uk-stepper-btn[data-action="dec"|"inc"] (or by
       position if data-action is absent — first btn = dec, last = inc); clamp
       to bounds; toggle :disabled at boundaries; trigger .is-pulsing on
       .uk-stepper-value for 400ms after a successful change; dispatch a
       'stepper:change' CustomEvent on the root with detail = { value, container }.
     - Without data-stepper-auto, only the CSS applies. Consumer JS handles
       the rest (this is how /pricing keeps its variable-step-by-magnitude
       logic on the notifications stepper).
   ============================================================ */

@keyframes stepperNextPulse {
    0%   { transform: scale(1);    color: var(--color-text); }
    40%  { transform: scale(1.15); color: var(--color-primary-light); }
    100% { transform: scale(1);    color: var(--color-text); }
}

.uk-stepper {
    --stepper-size: 48px;

    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* ---------- Buttons ---------- */
.uk-stepper-btn {
    width: var(--stepper-size);
    height: var(--stepper-size);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: var(--font-xl);
    font-family: inherit;
    line-height: 1;
    transition:
        background var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
}

.uk-stepper-btn:hover {
    background: rgba(var(--color-primary-rgb), 0.1);
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    transform: scale(1.05);
}

.uk-stepper-btn:active {
    transform: scale(0.95);
}

.uk-stepper-btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.uk-stepper-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

/* ---------- Value (read-only flavor) ---------- */
.uk-stepper-value {
    flex: 1;
    text-align: center;
    height: var(--stepper-size);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 12px;
    min-width: var(--stepper-size);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--color-text);
    font-family: var(--font-mono);
    transition: color var(--transition-base), transform var(--transition-base);
}

.uk-stepper-value.is-pulsing {
    animation: stepperNextPulse 0.4s ease-out;
}

/* ---------- Input (editable flavor) ---------- */
.uk-stepper-input {
    flex: 1;
    text-align: center;
    height: var(--stepper-size);
    padding: 0 12px;
    min-width: var(--stepper-size);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--color-text);
    font-family: var(--font-mono);
    outline: 2px solid transparent;
    outline-offset: 2px;
    -moz-appearance: textfield;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        outline-color var(--transition-fast);
}

.uk-stepper-input::-webkit-outer-spin-button,
.uk-stepper-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.uk-stepper-input:focus-visible {
    outline-color: var(--color-primary);
}

.uk-stepper-input:focus {
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
    outline: none;
}

/* ---------- Sizes ---------- */
.uk-stepper--sm {
    --stepper-size: 36px;
    gap: 6px;
}

.uk-stepper--sm .uk-stepper-btn {
    font-size: var(--font-lg);
}

.uk-stepper--sm .uk-stepper-value,
.uk-stepper--sm .uk-stepper-input {
    font-size: var(--font-sm);
    padding: 0 8px;
}

.uk-stepper--lg {
    --stepper-size: 56px;
    gap: 10px;
}

.uk-stepper--lg .uk-stepper-btn {
    font-size: var(--font-xxl);
}

.uk-stepper--lg .uk-stepper-value,
.uk-stepper--lg .uk-stepper-input {
    font-size: var(--font-lg);
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .uk-stepper-btn,
    .uk-stepper-value,
    .uk-stepper-input {
        transition: none;
    }
    .uk-stepper-btn:hover,
    .uk-stepper-btn:active {
        transform: none;
    }
    .uk-stepper-value.is-pulsing {
        animation: none;
    }
}