/* articles.css - list + article page styling, layers on top of blog.css */

.article-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.article-item:not(:last-child) {
    border-bottom: 1px solid var(--border-soft);
}

.article-link {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 1.75rem 0;
    text-decoration: none;
}

.article-title {
    font-size: 1.25rem;
    color: var(--accent2);
    font-weight: 500;
}

.article-link:hover .article-title {
    color: var(--text-strong);
}

.article-date {
    font-size: 0.85rem;
    color: var(--text-faint2);
}

.article-excerpt {
    font-size: 1rem;
    line-height: 1.55;
    color: var(--text-soft);
    margin-top: 0.25rem;
}

/* Single article page */
.article-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.article-header h1 {
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--accent2);
    margin: 0 0 0.5rem;
    line-height: 1.3;
}

.article-header .article-meta {
    font-size: 0.9rem;
    color: var(--text-faint2);
}

.article-body {
    font-size: 1.12rem;
    line-height: 1.8;
    color: var(--text-soft);
}

.article-body p {
    margin: 0 0 1.1rem;
}

.article-body h2 {
    font-size: 1.2rem;
    color: var(--accent);
    font-weight: 500;
    margin: 2.25rem 0 0.9rem;
}

.article-body strong {
    color: var(--text-strong);
    font-weight: 600;
}

.article-body .katex-display {
    margin: 1.75rem auto;
    overflow-x: auto;
    overflow-y: hidden;
    text-align: center;
}

.article-body .katex-display > .katex {
    display: inline-block;
    text-align: initial;
}

/* Build-up concept diagrams, one per point in the model */
.concept-diagram {
    margin: 1.75rem 0;
    padding: 1rem 1rem 0.75rem;
    border-left: 2px solid var(--border);
}

.concept-diagram figcaption {
    margin-top: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-faint);
    font-style: italic;
    text-align: center;
}

/* Interactive projection diagram */
.diagram-block {
    margin: 2.5rem 0;
    padding: 1.5rem 1.25rem;
    border: 1px solid var(--border-soft);
    border-radius: 10px;
    background: color-mix(in srgb, var(--text) 3%, transparent);
}

.diagram-svg-wrap {
    width: 100%;
    overflow-x: auto;
}

.diagram-svg-wrap svg {
    width: 100%;
    height: auto;
    display: block;
}

#scene-svg #l-line,
#scene-svg #l-glow {
    transition: x2 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

#scene-svg #win-badge {
    transition: r 0.3s ease, cx 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

#scene-svg #l-label {
    transition: x 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

#scene-svg #k-line,
#scene-svg #k-drop {
    transition: x2 0.35s cubic-bezier(0.22, 1, 0.36, 1), y2 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

#scene-svg #k-label {
    transition: x 0.35s cubic-bezier(0.22, 1, 0.36, 1), y 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes diagram-pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.85; }
}

.diagram-pulse {
    animation: diagram-pulse 1.6s ease-in-out infinite;
}

@keyframes diagram-pop {
    0% { transform: scale(0.4); opacity: 0; }
    60% { transform: scale(1.15); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

#scene-svg #win-tag {
    transform-origin: center;
    transition: fill 0.2s ease;
}

#scene-svg.diagram-winning #win-tag {
    animation: diagram-pop 0.35s ease-out;
}

.diagram-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--text-soft);
}

.diagram-controls label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.diagram-var {
    font-style: italic;
    color: var(--diag-you);
    font-weight: 600;
}

.diagram-controls input[type="range"] {
    width: 160px;
    accent-color: var(--diag-you);
}

.diagram-readout-val {
    font-weight: 600;
    color: var(--diag-you);
    min-width: 2.5rem;
    display: inline-block;
}

.diagram-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-soft);
    border-radius: 6px;
    padding: 0.45rem 0.9rem;
    font-family: 'Inconsolata', monospace;
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease;
}

.diagram-btn:hover {
    border-color: var(--diag-you);
    color: var(--diag-you);
}

.diagram-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-faint);
}

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

.swatch {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.swatch-pos {
    background: var(--diag-pos);
}

.swatch-neg {
    background: var(--diag-neg);
}

.swatch-you {
    background: var(--diag-you);
    outline: 2px solid var(--diag-you);
    outline-offset: 1px;
}

.diagram-title {
    font-size: 0.95rem;
    color: var(--text-faint);
    margin: 0 0 0.75rem;
    text-align: center;
}

.diagram-summary {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin: 0.5rem 0 1.25rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border);
    font-size: 0.95rem;
    color: var(--text-soft);
}

.diagram-summary-item {
    white-space: nowrap;
}

.diagram-caption {
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--text-faint);
    font-style: italic;
}

@media (max-width: 480px) {
    .diagram-block {
        padding: 1.1rem 0.85rem;
    }

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

.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    color: var(--text-faint);
    text-decoration: none;
    font-size: 0.95rem;
}

.back-link:hover {
    color: var(--accent);
}

@media (max-width: 480px) {
    .article-header h1 {
        font-size: 1.4rem;
    }

    .article-body {
        font-size: 1rem;
    }
}