/**
 * Tool Recommender
 * CSS prefix: .tr-
 * Dark theme, CSS custom properties with fallbacks
 */

/* --- Container --- */

.tr-viz {
    max-width: 640px;
    margin: var(--spacing-lg, 2rem) auto;
    padding: var(--spacing-md, 1.5rem) var(--spacing-lg, 2rem);
    background: var(--color-bg-elevated, #111111);
    border-radius: var(--radius-md, 16px);
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
}

.tr-heading {
    font-size: var(--font-size-base, 1rem);
    font-weight: 600;
    color: var(--color-text-primary, #ffffff);
    margin: 0 0 var(--spacing-xs, 0.5rem);
}

.tr-hint {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    margin: 0 0 var(--spacing-sm, 1rem);
    line-height: 1.5;
}

/* --- Questions --- */

.tr-questions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md, 1.5rem);
}

.tr-question {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.tr-q-text {
    font-size: var(--font-size-sm, 0.875rem);
    font-weight: 500;
    color: var(--color-text-primary, #ffffff);
    margin: 0;
}

/* --- Card Pairs --- */

.tr-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.tr-card {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem;
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    border-radius: var(--radius-sm, 8px);
    background: var(--color-bg-surface, #1a1a1a);
    cursor: pointer;
    transition: border-color var(--transition-fast, 150ms ease);
}

.tr-card:hover {
    border-color: var(--color-border-hover, rgba(255, 255, 255, 0.2));
}

.tr-card-selected {
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.04);
}

.tr-radio {
    appearance: none;
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    flex-shrink: 0;
    position: relative;
    margin-top: 2px;
}

.tr-radio:checked {
    border-color: rgba(255, 255, 255, 0.7);
}

.tr-radio:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.8);
}

.tr-radio:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

.tr-card-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.tr-card-label {
    font-size: var(--font-size-sm, 0.875rem);
    font-weight: 500;
    color: var(--color-text-primary, #ffffff);
}

.tr-card-desc {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    line-height: 1.4;
}

/* --- Button Row --- */

.tr-btn-row {
    display: flex;
    gap: 0.5rem;
    margin-top: var(--spacing-sm, 1rem);
}

.tr-reset-btn {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    border-radius: 6px;
    background: transparent;
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
    font-size: var(--font-size-sm, 0.875rem);
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast, 150ms ease);
}

.tr-reset-btn:hover {
    border-color: var(--color-border-hover, rgba(255, 255, 255, 0.2));
    color: var(--color-text-primary, #ffffff);
}

.tr-reset-btn:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

/* --- Results --- */

.tr-results:not(:empty) {
    margin-top: var(--spacing-md, 1.5rem);
    padding-top: var(--spacing-md, 1.5rem);
    border-top: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
}

.tr-result-card {
    padding: var(--spacing-sm, 1rem);
    border-radius: var(--radius-sm, 8px);
    background: var(--color-bg-surface, #1a1a1a);
}

.tr-rec-heading {
    font-size: var(--font-size-base, 1rem);
    font-weight: 600;
    color: var(--color-text-primary, #ffffff);
    margin: 0 0 var(--spacing-sm, 1rem);
}

.tr-rec-heading:focus:not(:focus-visible) {
    outline: none;
}

/* --- Confidence Bar --- */

.tr-confidence {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-bottom: var(--spacing-sm, 1rem);
}

.tr-confidence-label {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.tr-bar-track {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    overflow: hidden;
}

.tr-bar-fill {
    height: 100%;
    background: rgba(255, 255, 255, 0.45);
    border-radius: 2px;
    transition: width 400ms ease;
}

/* --- Reasons --- */

.tr-reasons {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-sm, 1rem);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.tr-reason {
    font-size: var(--font-size-sm, 0.875rem);
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
    line-height: 1.5;
    padding-left: 1rem;
    position: relative;
}

.tr-reason::before {
    content: '\2022';
    position: absolute;
    left: 0;
    color: rgba(255, 255, 255, 0.35);
}

.tr-also-consider {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    line-height: 1.5;
    margin: 0;
    font-style: italic;
}

/* --- Comparison Table --- */

.tr-table-wrapper {
    margin-top: var(--spacing-md, 1.5rem);
}

.tr-table-heading {
    font-size: var(--font-size-xs, 0.75rem);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    margin: 0 0 var(--spacing-xs, 0.5rem);
    font-weight: 600;
}

.tr-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-xs, 0.75rem);
}

.tr-th {
    text-align: left;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
    font-weight: 600;
}

.tr-td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    line-height: 1.4;
}

.tr-td-feature {
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
    font-weight: 500;
}

.tr-row-relevant .tr-td {
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
    background: rgba(255, 255, 255, 0.02);
}

.tr-row-relevant .tr-td-feature {
    color: var(--color-text-primary, #ffffff);
}

/* --- Noscript --- */

.tr-noscript {
    padding: var(--spacing-sm, 1rem);
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    border-radius: var(--radius-sm, 8px);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    font-size: var(--font-size-sm, 0.875rem);
    text-align: center;
}

/* --- Responsive --- */

@media (max-width: 768px) {
    .tr-viz {
        padding: var(--spacing-sm, 1rem) var(--spacing-md, 1.5rem);
    }

    .tr-table {
        font-size: 0.7rem;
    }

    .tr-th,
    .tr-td {
        padding: 0.4rem 0.5rem;
    }
}

@media (max-width: 480px) {
    .tr-viz {
        padding: var(--spacing-sm, 1rem);
        border-radius: var(--radius-sm, 8px);
    }

    .tr-cards {
        grid-template-columns: 1fr;
    }

    .tr-card {
        min-height: 44px;
    }

    .tr-table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* --- Reduced motion --- */

@media (prefers-reduced-motion: reduce) {
    .tr-card,
    .tr-reset-btn,
    .tr-bar-fill {
        transition: none;
    }
}