/**
 * Keyboard Lab - Checker (Laboratory)
 * Scoped to .kl-page--checker.
 */

.kl-page--checker {
    max-width: 1240px;
    margin: 0 auto;
    padding: 1.25rem 1rem 2rem;
    color: var(--lab-text);
}

@media (min-width: 880px) {
    .kl-page--checker {
        padding-inline: 1.5rem;
    }
}

.kl-page--checker .kl-page-header {
    margin-bottom: 1.2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: space-between;
    align-items: flex-start;
}

.kl-page--checker .kl-page-header h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 2.9rem);
    line-height: 1.1;
}

.kl-page--checker .kl-tagline {
    margin: 0.55rem 0 0;
    color: var(--lab-muted);
}

.kl-page--checker .kl-page-badge-slot {
    display: flex;
    justify-content: flex-end;
}

.kl-page--checker .kl-try-also-row {
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem 0.65rem;
    align-items: center;
}

.kl-page--checker .kl-try-also-label {
    color: var(--lab-muted);
    font-size: 0.82rem;
    font-weight: 600;
}

.kl-page--checker .kl-try-also-link {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid var(--lab-border);
    background: var(--theme-surface);
    color: var(--lab-text);
    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    padding: 0.34rem 0.68rem;
    transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.kl-page--checker .kl-try-also-link:hover {
    border-color: var(--theme-border-strong);
    background: var(--theme-surface-soft);
}

.kl-page--checker .kl-try-also-link:focus-visible {
    outline: 3px solid var(--theme-focus);
    outline-offset: 2px;
}

.kl-page--checker .kl-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.4rem;
    align-items: center;
    margin-bottom: 1.6rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--lab-border);
    background: var(--theme-surface-elevated);
    padding: 0.85rem 1rem;
}

.kl-page--checker .kl-layout-tabs {
    display: flex;
    gap: 0.45rem;
}

.kl-page--checker .kl-tab-btn {
    appearance: none;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.4rem 0.8rem;
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    background: transparent;
    color: var(--lab-muted);
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.kl-page--checker .kl-tab-btn[aria-selected="true"] {
    border-color: rgba(26, 34, 49, 0.28);
    background: var(--theme-surface);
    color: var(--lab-text);
}

.kl-page--checker .kl-settings-group {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.88rem;
}

.kl-page--checker .kl-input-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.kl-page--checker .kl-input-number {
    width: 88px;
    padding: 0.38rem 0.45rem;
    border: 1px solid var(--lab-border);
    border-radius: var(--radius-sm);
    font: inherit;
    font-family: var(--font-mono);
}

.kl-page--checker .kl-help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    border: 1px solid var(--lab-border);
    color: var(--lab-muted);
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.kl-page--checker .kl-checker-grid {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: 1fr;
}

@media (min-width: 1060px) {
    .kl-page--checker .kl-checker-grid {
        grid-template-columns: minmax(0, 1fr) 330px;
        align-items: start;
    }
}

.kl-page--checker .kl-map-section {
    position: relative;
    border-radius: var(--radius-md);
    border: 1px solid var(--lab-border);
    background: var(--lab-surface);
    padding: 1rem;
    overflow-x: auto;
    box-shadow: var(--shadow-soft);
}

.kl-page--checker .kl-keyboard-map {
    min-width: 860px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.kl-page--checker .kl-key-row {
    display: flex;
    gap: 6px;
    min-height: 46px;
}

.kl-page--checker .kbd-key {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 7px;
    border: 1px solid #cfd5df;
    background: #eef1f5;
    color: #262f40;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.01em;
    user-select: none;
    box-shadow: 0 2px 0 rgba(11, 14, 20, 0.12);
    transition: transform 0.06s ease, filter 0.06s ease, background-color 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

.kl-page--checker .kbd-key.is-tested {
    background: #eaf7f0;
    border-color: #9eddbe;
    color: #176f46;
}

.kl-page--checker .kbd-key.is-pressed {
    background: var(--lab-accent);
    border-color: #00b45a;
    color: #072116;
    transform: scale(0.95);
    filter: brightness(1.12);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.32);
}

.kl-page--checker .kbd-key.is-chatter {
    background: var(--lab-warn);
    border-color: #e13228;
    color: #fff;
    animation: kl-chatter-pulse 250ms linear infinite;
}

.kl-page--checker .kbd-key.is-chatter::after {
    content: "!";
    position: absolute;
    top: -6px;
    right: -6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid #b11f19;
    background: #fff;
    color: #b11f19;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 700;
}

.kl-page--checker .kbd-key.is-suspected-stuck {
    border-color: #b98700;
    background: #ffd65c;
    color: #2f2400;
}

.kl-page--checker .kl-map-legend {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    justify-content: center;
    color: var(--lab-muted);
    font-size: 0.82rem;
}

.kl-page--checker .legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.kl-page--checker .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.kl-page--checker .dot--active {
    background: var(--lab-accent);
}

.kl-page--checker .dot--history {
    background: #eaf7f0;
    border: 1px solid #9eddbe;
}

.kl-page--checker .dot--chatter {
    background: var(--lab-warn);
}

.kl-page--checker .kl-sidebar {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.kl-page--checker .kl-panel {
    border-radius: var(--radius-md);
    border: 1px solid var(--lab-border);
    background: var(--theme-surface-elevated);
    padding: 0.88rem;
}

.kl-page--checker .kl-panel h3 {
    margin: 0 0 0.72rem;
    font-size: 0.93rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.kl-page--checker .kl-data-list {
    margin: 0;
    display: grid;
    gap: 0.45rem;
    font-size: 0.86rem;
}

.kl-page--checker .data-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.kl-page--checker .data-row dt {
    color: var(--lab-muted);
}

.kl-page--checker .data-row dd {
    margin: 0;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.81rem;
}

.kl-page--checker .kl-held-list {
    min-height: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.kl-page--checker .kl-key-badge {
    border-radius: 999px;
    border: 1px solid var(--theme-border);
    background: var(--theme-surface-soft);
    padding: 0.2rem 0.48rem;
    font-family: var(--font-mono);
    font-size: 0.76rem;
}

.kl-page--checker .kl-log-container {
    min-height: 220px;
    max-height: 260px;
    overflow-y: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--theme-border);
    background: var(--theme-surface-soft);
    padding: 0.45rem 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.76rem;
}

.kl-page--checker .log-entry {
    display: grid;
    grid-template-columns: 74px 1fr;
    gap: 0.45rem;
    align-items: start;
    border-bottom: 1px solid var(--theme-border);
    padding: 0.18rem 0;
    color: #253046;
}

.kl-page--checker .log-time {
    color: var(--theme-muted);
}

.kl-page--checker .log-entry--down {
    color: #1e3a66;
}

.kl-page--checker .log-entry--up {
    color: #3d4a62;
}

.kl-page--checker .log-entry--chatter,
.kl-page--checker .log-entry.is-chatter {
    color: #991b1b;
    font-weight: 700;
    background: rgba(255, 59, 48, 0.08);
}

.kl-page--checker .log-entry[data-severity="warning"] {
    border-left: 3px solid rgba(255, 59, 48, 0.72);
    padding-left: 0.3rem;
}

.kl-page--checker .kl-btn {
    appearance: none;
    border: 1px solid var(--theme-accent);
    border-radius: 8px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    padding: 0.58rem 0.82rem;
}

.kl-page--checker .kl-btn--primary {
    background: var(--theme-accent);
    color: #fff;
}

.kl-page--checker .kl-btn--block {
    width: 100%;
}

.kl-page--checker .kl-loading-state {
    color: var(--lab-muted);
    text-align: center;
    padding: 2.2rem 0;
    font-style: italic;
}

.kl-page--checker .kl-empty-state {
    color: var(--lab-muted);
    font-size: 0.85rem;
    font-style: italic;
}

.kl-page--checker .kl-checker-info {
    margin-top: 1.85rem;
    margin-bottom: 1.65rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--lab-border);
    background: var(--theme-surface-elevated);
    box-shadow: var(--shadow-soft);
    padding: 1rem;
}

.kl-page--checker .kl-checker-info h2 {
    margin: 0;
    font-size: clamp(1.35rem, 2.8vw, 1.75rem);
    line-height: 1.2;
}

.kl-page--checker .kl-checker-info > p {
    margin: 0.78rem 0 0;
    color: var(--theme-muted-strong);
    line-height: 1.6;
}

.kl-page--checker .kbdlab-info-grid {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.85rem;
}

@media (min-width: 900px) {
    .kl-page--checker .kbdlab-info-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.kl-page--checker .kl-info-card {
    border-radius: var(--radius-md);
    border: 1px solid var(--theme-border);
    background: var(--theme-surface);
    padding: 0.9rem 0.95rem;
}

.kl-page--checker .kl-info-card h3 {
    margin: 0;
    font-size: 1rem;
    line-height: 1.35;
}

.kl-page--checker .kl-info-card ol,
.kl-page--checker .kl-info-card ul {
    margin: 0.65rem 0 0;
    padding-left: 1.15rem;
    display: grid;
    gap: 0.45rem;
    color: var(--theme-muted-strong);
    line-height: 1.45;
}

.kl-page--checker .kl-info-card li {
    font-size: 0.92rem;
}

.kl-page--checker .kl-instructions-links {
    margin-top: 0.95rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.kl-page--checker .kl-instructions-links a {
    color: var(--theme-link);
    font-weight: 600;
}

.kl-page--checker .kl-instructions-links a:focus-visible {
    outline: 3px solid var(--theme-focus);
    outline-offset: 2px;
}

@keyframes kl-chatter-pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 59, 48, 0.35);
    }

    50% {
        transform: scale(0.98);
        box-shadow: 0 0 0 5px rgba(255, 59, 48, 0);
    }

    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 59, 48, 0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .kl-page--checker .kbd-key,
    .kl-page--checker .kl-tab-btn {
        transition: none;
    }

    .kl-page--checker .kbd-key.is-chatter {
        animation: none;
        outline: 3px solid var(--lab-warn);
        outline-offset: -3px;
    }
}