/** Responsive four-direction gesture challenge. */
.kt-challenge {
    --kt-challenge-track: 56px;
    --kt-challenge-handle: 44px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
}

.kt-challenge__prompt,
.kt-challenge__status {
    margin: 0;
    font-size: 14px;
    line-height: 1.4;
    color: var(--katomu-text-secondary, #b9c0cc);
}

.kt-challenge__status {
    min-height: 1.4em;
    text-align: center;
}

.kt-challenge__track {
    position: relative;
    width: 100%;
    height: var(--kt-challenge-track);
    min-width: 0;
    padding: 6px;
    box-sizing: border-box;
    border: 1px solid var(--katomu-border, #3a3f4a);
    border-radius: calc(var(--kt-challenge-track) / 2);
    background: var(--katomu-surface-2, #23262e);
    touch-action: none;
    overflow: hidden;
    cursor: pointer;
}

.kt-challenge--vertical .kt-challenge__track {
    width: var(--kt-challenge-track);
    height: clamp(220px, 42vh, 320px);
    margin: 0 auto;
}

.kt-challenge__zone {
    position: absolute;
    top: 6px;
    bottom: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    border: 2px dashed var(--katomu-accent, #7aa2f7);
    border-radius: calc(var(--kt-challenge-track) / 2);
    background: color-mix(in srgb, var(--katomu-accent, #7aa2f7) 12%, transparent);
    color: var(--katomu-text-secondary, #b9c0cc);
    font-size: 11px;
    letter-spacing: .04em;
    text-transform: uppercase;
    pointer-events: none;
    user-select: none;
}

.kt-challenge--vertical .kt-challenge__zone {
    top: auto;
    bottom: auto;
    left: 6px;
    right: 6px;
    min-height: 44px;
    writing-mode: vertical-rl;
}

.kt-challenge__handle {
    position: absolute;
    top: 50%;
    width: var(--kt-challenge-handle);
    height: var(--kt-challenge-handle);
    margin-left: calc(var(--kt-challenge-handle) / -2);
    transform: translateY(-50%);
    display: grid;
    place-items: center;
    border: 2px solid var(--katomu-surface-1, #1a1d23);
    border-radius: 50%;
    background: var(--katomu-accent, #7aa2f7);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .35);
    color: var(--katomu-surface-1, #1a1d23);
    cursor: grab;
    touch-action: none;
    z-index: 2;
}

.kt-challenge--vertical .kt-challenge__handle {
    top: auto;
    left: 50%;
    margin-left: 0;
    margin-top: calc(var(--kt-challenge-handle) / -2);
    transform: translateX(-50%);
}

.kt-challenge__handle::after {
    font-size: 22px;
    font-weight: 800;
    line-height: 1;
}
.kt-challenge--right .kt-challenge__handle::after { content: '→'; }
.kt-challenge--left .kt-challenge__handle::after { content: '←'; }
.kt-challenge--down .kt-challenge__handle::after { content: '↓'; }
.kt-challenge--up .kt-challenge__handle::after { content: '↑'; }

.kt-challenge__handle:active { cursor: grabbing; }
.kt-challenge__handle:focus-visible {
    outline: 3px solid var(--katomu-focus, #ffd166);
    outline-offset: 3px;
}

.kt-challenge--on-target .kt-challenge__zone {
    border-style: solid;
    background: color-mix(in srgb, var(--katomu-success, #5ad69b) 20%, transparent);
}

.kt-challenge--done .kt-challenge__handle {
    background: var(--katomu-success, #5ad69b);
    cursor: default;
}

.kt-challenge:not(.kt-challenge--reduced-motion) .kt-challenge__handle {
    transition: box-shadow 120ms ease, background-color 120ms ease;
}

.kt-turnstile-host {
    display: flex;
    justify-content: center;
    min-height: 0;
    margin-top: 12px;
}

.kt-turnstile-status {
    min-height: 1.4em;
    margin: 8px 0 0;
    color: var(--katomu-text-secondary, #b9c0cc);
    font-size: 13px;
    text-align: center;
}

@media (max-width: 480px) {
    .kt-challenge { max-width: 100%; }
    .kt-challenge--vertical .kt-challenge__track { height: clamp(200px, 36vh, 280px); }
}

@media (prefers-reduced-motion: reduce) {
    .kt-challenge__handle { transition: none !important; }
}