/**
 * Hybrid Retriever Interactive
 * Architecture Explorer + RRF Calculator
 * Uses site design tokens (dark theme, white opacity layers)
 */

/* --- Container --- */

.hr-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));
    font-family: inherit;
}

.hr-title {
    font-size: var(--font-size-base, 1rem);
    font-weight: 700;
    color: var(--color-text-primary, #ffffff);
    margin: 0 0 var(--spacing-xs, 0.5rem);
}

.hr-subtitle {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    margin: 0 0 var(--spacing-md, 1.5rem);
    line-height: 1.5;
}

/* --- Architecture Flow --- */

.hr-flow {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-bottom: var(--spacing-md, 1.5rem);
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.25rem;
}

.hr-flow-step {
    flex: 1 1 0;
    min-width: 80px;
    padding: 0.75rem;
    background: var(--color-bg-surface, #1a1a1a);
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    cursor: pointer;
    transition: background var(--transition-fast, 150ms ease),
                border-color var(--transition-fast, 150ms ease);
}

.hr-flow-step:first-child {
    border-radius: var(--radius-sm, 8px) 0 0 var(--radius-sm, 8px);
}

.hr-flow-step:last-child {
    border-radius: 0 var(--radius-sm, 8px) var(--radius-sm, 8px) 0;
}

.hr-flow-step:hover {
    background: var(--color-bg-hover, #222222);
    border-color: var(--color-border-hover, rgba(255, 255, 255, 0.2));
}

.hr-flow-step.hr-active {
    background: var(--color-bg-hover, #222222);
    border-color: var(--color-border-hover, rgba(255, 255, 255, 0.2));
    z-index: 1;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.15);
}

.hr-flow-step:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

.hr-flow-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.hr-flow-name {
    font-weight: 700;
    font-size: var(--font-size-sm, 0.875rem);
    color: var(--color-text-primary, #ffffff);
}

.hr-flow-stat {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    margin-top: 0.25rem;
}

.hr-flow-arrow {
    display: flex;
    align-items: center;
    padding: 0 0.25rem;
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* --- Detail Panel --- */

.hr-detail {
    background: var(--color-bg-surface, #1a1a1a);
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    border-radius: var(--radius-sm, 8px);
    padding: var(--spacing-sm, 1rem);
    margin-bottom: var(--spacing-md, 1.5rem);
    display: none;
}

.hr-detail.hr-visible {
    display: block;
}

.hr-detail-title {
    font-weight: 700;
    font-size: var(--font-size-sm, 0.875rem);
    color: var(--color-text-primary, #ffffff);
    margin-bottom: 0.75rem;
}

.hr-detail-text {
    font-size: var(--font-size-sm, 0.875rem);
    line-height: 1.6;
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
}

.hr-detail-code {
    background: rgba(255, 255, 255, 0.04);
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
    padding: var(--spacing-sm, 1rem);
    border-radius: var(--radius-sm, 8px);
    font-family: var(--font-mono, 'SF Mono', Monaco, 'Cascadia Code', monospace);
    font-size: var(--font-size-xs, 0.75rem);
    line-height: 1.5;
    overflow-x: auto;
    margin-top: 0.75rem;
    white-space: pre;
}

/* --- RRF Calculator --- */

.hr-calc {
    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));
}

.hr-calc-title {
    font-size: var(--font-size-base, 1rem);
    font-weight: 700;
    color: var(--color-text-primary, #ffffff);
    margin: 0 0 var(--spacing-xs, 0.5rem);
}

.hr-calc-desc {
    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;
}

/* --- Scenario Buttons --- */

.hr-scenarios {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm, 1rem);
    flex-wrap: wrap;
}

.hr-scenario-label {
    font-size: var(--font-size-xs, 0.75rem);
    font-weight: 600;
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.hr-scenario-btn {
    padding: 0.35rem 0.75rem;
    font-size: var(--font-size-xs, 0.75rem);
    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));
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition-fast, 150ms ease);
}

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

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

.hr-scenario-btn.hr-scenario-active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary, #ffffff);
    border-color: rgba(255, 255, 255, 0.3);
}

/* --- Controls --- */

.hr-controls {
    display: flex;
    gap: var(--spacing-sm, 1rem);
    align-items: center;
    margin-bottom: var(--spacing-sm, 1rem);
    flex-wrap: wrap;
}

.hr-control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hr-control-label {
    font-size: var(--font-size-xs, 0.75rem);
    font-weight: 600;
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.hr-k-input {
    width: 4rem;
    padding: 0.25rem 0.4rem;
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    border-radius: 6px;
    font-size: var(--font-size-sm, 0.875rem);
    text-align: center;
    font-family: var(--font-mono, 'SF Mono', Monaco, 'Cascadia Code', monospace);
    color: var(--color-text-primary, #ffffff);
    background: var(--color-bg-surface, #1a1a1a);
    transition: border-color var(--transition-fast, 150ms ease);
}

.hr-k-input:focus {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
    border-color: var(--color-border-hover, rgba(255, 255, 255, 0.2));
}

.hr-formula {
    font-family: var(--font-mono, 'SF Mono', Monaco, 'Cascadia Code', monospace);
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    padding: 0.35rem 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 6px;
}

/* --- K-value Hint --- */

.hr-k-hint {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    font-style: italic;
    flex-basis: 100%;
    line-height: 1.5;
}

/* --- Table --- */

.hr-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
}

/* Scroll fade hint — only visible when table overflows */
.hr-table-wrap.hr-overflows::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 2rem;
    background: linear-gradient(to right, transparent, var(--color-bg-elevated, #111111));
    pointer-events: none;
    opacity: 1;
    transition: opacity 200ms ease;
}

.hr-table-wrap.hr-scrolled-end::after {
    opacity: 0;
}

/* Chunk name column */
.hr-table td:first-child {
    font-size: var(--font-size-xs, 0.75rem);
    font-family: var(--font-mono, 'SF Mono', Monaco, 'Cascadia Code', monospace);
    line-height: 1.4;
    max-width: 140px;
    color: var(--color-text-primary, #ffffff);
}

.hr-table {
    width: 100%;
    min-width: 520px;
    border-collapse: collapse;
    font-size: var(--font-size-sm, 0.875rem);
}

.hr-table th {
    text-align: left;
    padding: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    font-weight: 600;
    font-size: 0.65rem;
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.hr-table td {
    padding: 0.5rem;
    border-bottom: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    vertical-align: middle;
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
}

.hr-table tr:last-child td {
    border-bottom: none;
}

.hr-table tr.hr-highlight {
    background: rgba(255, 255, 255, 0.06);
}

.hr-rank-input {
    width: 3rem;
    padding: 0.2rem 0.3rem;
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    border-radius: 4px;
    font-size: var(--font-size-xs, 0.75rem);
    text-align: center;
    font-family: var(--font-mono, 'SF Mono', Monaco, 'Cascadia Code', monospace);
    color: var(--color-text-primary, #ffffff);
    background: var(--color-bg-surface, #1a1a1a);
    transition: border-color var(--transition-fast, 150ms ease);
}

.hr-rank-input:focus {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
    border-color: var(--color-border-hover, rgba(255, 255, 255, 0.2));
}

.hr-score {
    font-family: var(--font-mono, 'SF Mono', Monaco, 'Cascadia Code', monospace);
    font-weight: 600;
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-primary, #ffffff);
    white-space: nowrap;
}

.hr-rank-none {
    color: var(--color-text-tertiary, rgba(255, 255, 255, 0.55));
    font-style: italic;
    font-size: var(--font-size-xs, 0.75rem);
}

/* --- Winner Badge --- */

.hr-winner {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.15);
    color: var(--color-text-primary, #ffffff);
    margin-left: 0.5rem;
    vertical-align: middle;
}

/* --- Insight Annotation --- */

.hr-insight {
    font-size: var(--font-size-sm, 0.875rem);
    line-height: 1.6;
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.65));
    padding: 0.75rem var(--spacing-sm, 1rem);
    margin-top: var(--spacing-sm, 1rem);
    background: var(--color-bg-surface, #1a1a1a);
    border-left: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 0 var(--radius-sm, 8px) var(--radius-sm, 8px) 0;
    min-height: 1.5em;
}

.hr-insight:empty {
    display: none;
}

/* --- Jargon Tooltips --- */

.hr-viz abbr[title] {
    text-decoration: underline dotted rgba(255, 255, 255, 0.4);
    text-underline-offset: 2px;
    cursor: help;
}

/* --- Noscript Fallback --- */

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

/* --- Responsive --- */

@media (max-width: 600px) {
    .hr-viz {
        padding: var(--spacing-sm, 1rem);
        margin: var(--spacing-sm, 1rem) auto;
        border-radius: var(--radius-sm, 8px);
    }

    .hr-flow {
        flex-direction: column;
        overflow-x: visible;
    }

    .hr-flow-step {
        min-width: 0;
    }

    .hr-flow-step:first-child {
        border-radius: var(--radius-sm, 8px) var(--radius-sm, 8px) 0 0;
    }

    .hr-flow-step:last-child {
        border-radius: 0 0 var(--radius-sm, 8px) var(--radius-sm, 8px);
    }

    .hr-flow-arrow {
        justify-content: center;
        transform: rotate(90deg);
        padding: 0.25rem 0;
    }

    .hr-controls {
        flex-direction: column;
        align-items: flex-start;
    }

    .hr-scenarios {
        flex-direction: column;
        align-items: flex-start;
    }

    .hr-table {
        font-size: var(--font-size-xs, 0.75rem);
    }

    .hr-table td:first-child {
        font-size: 0.65rem;
        max-width: 90px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .hr-score {
        font-size: var(--font-size-xs, 0.75rem);
    }
}

/* --- Reduced Motion --- */

@media (prefers-reduced-motion: reduce) {
    .hr-flow-step,
    .hr-scenario-btn,
    .hr-k-input,
    .hr-rank-input {
        transition: none;
    }
}