/**
 * Bottleneck Checker - app-specific styles.
 *
 * Uses design tokens from main.css only (no hard-coded colors, spacing or
 * radii). The app container is centered with `margin: 0 auto`; interactive
 * elements keep the shared form-select/btn states and get focus-visible
 * treatment here.
 */

/* Visually hidden (screen-reader only). main.css does not define .sr-only
   globally; this app scopes its own copy so .sr-only elements (live region)
   behave identically to the other benchmark apps. */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.bnc-container {
    width: 100%;
    max-width: var(--app-container-max);
    margin: 0 auto;
    padding: var(--space-6) var(--space-4);
}

.bnc-panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-6);
}

.bnc-panel + .bnc-panel {
    margin-top: var(--space-4);
}

/* (2) Intro */
.bnc-intro__title {
    margin: 0 0 var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.bnc-intro__text {
    margin: 0;
    color: var(--color-text);
    line-height: var(--line-height-relaxed);
}

.bnc-intro__privacy {
    margin: var(--space-3) 0 0;
    font-weight: 600;
    color: var(--color-success-text);
}

/* (3) Controls grid */
.bnc-controls__grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-4);
}

@media (max-width: 720px) {
    .bnc-controls__grid {
        grid-template-columns: 1fr;
    }
}

/* (4) Verdict panel - state color comes from data-verdict */
.bnc-verdict {
    border-left: 4px solid var(--color-border-dark);
}

.bnc-verdict[data-verdict="cpu-bound"] {
    border-left-color: var(--color-error);
}

.bnc-verdict[data-verdict="balanced"] {
    border-left-color: var(--color-success);
}

.bnc-verdict[data-verdict="gpu-bound"] {
    border-left-color: var(--color-warning);
}

.bnc-verdict__head {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.bnc-verdict__title {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.bnc-verdict__word {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

.bnc-verdict[data-verdict="cpu-bound"] .bnc-verdict__word {
    color: var(--color-error-text);
}

.bnc-verdict[data-verdict="balanced"] .bnc-verdict__word {
    color: var(--color-success-text);
}

.bnc-verdict[data-verdict="gpu-bound"] .bnc-verdict__word {
    color: var(--color-warning-text);
}

.bnc-verdict__reading {
    margin: var(--space-3) 0 0;
    line-height: var(--line-height-relaxed);
    color: var(--color-text);
}

.bnc-verdict__margin {
    margin: var(--space-3) 0 0;
    font-weight: 600;
    color: var(--color-text);
}

.bnc-verdict__note {
    margin: var(--space-2) 0 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* (5) Honesty block */
.bnc-honest__title {
    margin: 0 0 var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.bnc-honest__text {
    margin: 0 0 var(--space-3);
    line-height: var(--line-height-relaxed);
    color: var(--color-text);
}

.bnc-honest__related-title {
    margin: var(--space-4) 0 var(--space-2);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}

.related-tools-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.related-tools-list a {
    display: inline-block;
    color: var(--color-primary-text);
    font-weight: 600;
    text-decoration: underline;
    border-radius: var(--radius-sm);
}

.related-tools-list a:hover {
    color: var(--color-primary-text-hover);
}

.related-tools-list a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Catalog error fail-safe */
.bnc-error {
    border-color: var(--color-error);
}

.bnc-error__title {
    margin: 0 0 var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-error-text);
}

.bnc-error__text {
    margin: 0;
    color: var(--color-text);
    line-height: var(--line-height-relaxed);
}

/* Section spacing after the tool (use-cases / FAQ are shared main.css
   classes; the gap from the tool section is app-owned) */
#bottleneck-checker + .use-cases {
    margin-top: var(--space-8);
}