/* Public article index and reading view. */
.article-list {
    list-style: none;
}

.article-list-item {
    position: relative;
    padding: 28px 0;
    border-bottom: 1px solid var(--color-rule);
}

.article-list-item:first-child {
    border-top: none;
}

.article-list-item a {
    display: block;
}

.article-list-item>a:hover {
    opacity: 1;
}

.article-list-preview {
    display: flow-root;
}

.article-list-image {
    display: block;
    height: auto;
    margin-top: 0.35em;
    margin-bottom: 1em;
    border: 1px solid var(--color-image-border);
    border-radius: 9px;
}

.article-list-image-align-left {
    float: left;
    max-width: min(44%, 260px);
    margin-right: 1.25em;
}

.article-list-image-align-right {
    float: right;
    max-width: min(44%, 260px);
    margin-left: 1.25em;
}

.article-list-image-align-center {
    clear: both;
    max-width: 100%;
    margin-right: auto;
    margin-left: auto;
}

.article-list-image-wide {
    max-width: 100%;
}

.article-list-image-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    margin-top: 0;
    margin-bottom: 20px;
    object-fit: cover;
}

.article-read-tooltip {
    position: fixed;
    z-index: 200;
    top: 0;
    left: 0;
    padding: 11px 16px 10px;
    color: var(--color-date-badge-text);
    background: var(--color-date-badge-bg);
    border: 1px solid var(--color-date-badge-border);
    font-family: var(--font-ui);
    font-size: 0.65rem;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transform: translateY(5px) scale(0.97);
    transform-origin: bottom center;
    transition:
        opacity 140ms ease-out,
        transform 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.article-read-tooltip.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    animation: article-tooltip-bounce-up 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.article-read-tooltip::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 8px;
    height: 8px;
    margin-left: -4px;
    background: var(--color-date-badge-bg);
    border-right: 1px solid var(--color-date-badge-border);
    border-bottom: 1px solid var(--color-date-badge-border);
    transform: rotate(45deg);
}

@keyframes article-tooltip-bounce-up {
    0% {
        transform: translateY(9px) scale(0.97);
    }

    68% {
        transform: translateY(-3px) scale(1.01);
    }

    100% {
        transform: translateY(0) scale(1);
    }
}

.article-list-title {
    font-family: var(--font-post);
    font-size: 1.8rem;
    font-weight: 300;
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-bottom: 6px;
    color: var(--color-preview-title);
}

.article-list-subtitle {
    font-family: var(--font-post);
    font-size: 1.15rem;
    font-weight: 300;
    font-style: italic;
    line-height: 1.4;
    color: var(--color-text-secondary);
    margin-top: -2px;
    margin-bottom: 8px;
}

.article-list-excerpt {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    font-family: var(--font-post);
    font-size: 1.18rem;
    font-weight: var(--font-weight-article, 400);
    line-height: 1.6;
    color: var(--color-article-list-excerpt);
}

.article-list-excerpt-with-image {
    display: block;
    max-height: 12.8em;
    overflow: hidden;
}

.article-list-read-more {
    display: inline-block;
    margin-top: 6px;
    font-family: var(--font-post);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--color-text-secondary);
    white-space: nowrap;
    transition: color 0.15s ease;
}

.article-list-item>a:hover .article-list-read-more {
    color: var(--color-text);
}

.article-header {
    margin-bottom: 40px;
}

.article-layout {
    position: relative;
}

.article-date-badge {
    position: absolute;
    top: 0;
    right: calc(100% + 28px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 66px;
    height: 66px;
    padding: 9px 8px 8px;
    color: var(--color-date-badge-text);
    background: var(--color-date-badge-bg);
    border: 1px solid var(--color-date-badge-border);
    font-family: var(--font-ui);
    font-variant-numeric: tabular-nums;
    line-height: 1;
    text-align: center;
}

.article-list-date-badge {
    top: 28px;
}

.date-badge-primary {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.06em;
}

.date-badge-rule {
    width: 100%;
    height: 1px;
    margin: 9px 0 7px;
    background: var(--color-date-badge-rule);
}

.date-badge-year {
    color: var(--color-date-badge-secondary);
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.12em;
}

.article-title {
    font-family: var(--font-post);
    font-size: 2.6rem;
    font-weight: 300;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.article-subtitle {
    font-family: var(--font-post);
    font-size: 1.35rem;
    font-weight: 300;
    font-style: italic;
    line-height: 1.4;
    color: var(--color-text-secondary);
    margin-top: 4px;
    margin-bottom: 0;
}

.article-body {
    display: flow-root;
    font-family: var(--font-post);
    font-size: 1.18rem;
    font-weight: var(--font-weight-article, 400);
    line-height: 1.75;
    color: var(--color-text);
}

.article-body .article-image,
.article-image {
    display: block;
    height: auto;
    margin-top: 0.5em;
    margin-bottom: 0.6em;
    border: 1px solid var(--color-image-border);
    border-radius: 9px;
}

.article-body .article-image-align-center {
    clear: both;
    margin-right: auto;
    margin-left: auto;
}

.article-body .article-image-wide {
    position: relative;
    left: 50%;
    max-width: min(960px, calc(100vw - (2 * var(--page-padding))));
    transform: translateX(-50%);
}

.article-body .article-image-align-left {
    float: left;
    max-width: min(48%, 320px);
    margin-right: 1.5em;
}

.article-body .article-image-align-right {
    float: right;
    max-width: min(48%, 320px);
    margin-left: 1.5em;
}

.preview-article .article-image-wide {
    max-width: min(840px, calc(100vw - 80px));
}

.article-body .article-image-openable,
.preview-article .article-image-openable {
    cursor: zoom-in;
    transition: opacity 0.15s ease;
}

.article-body .article-image-openable:hover,
.preview-article .article-image-openable:hover {
    opacity: 0.95;
}

.article-body .article-image-openable:focus-visible,
.preview-article .article-image-openable:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

.image-zoom-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 10000;
    pointer-events: none;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.image-zoom-img {
    pointer-events: auto;
    max-width: calc(100vw - 10px);
    max-height: calc(100vh - 10px);
    width: auto;
    height: auto;
    object-fit: contain;
    border: 5px solid var(--color-accent);
    box-sizing: border-box;
    cursor: zoom-out;
    outline: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
    will-change: transform, opacity;
}

.article-reveal {
    clear: both;
    margin: 1.6em 0;
    text-align: center;
}

.article-reveal>summary {
    display: inline-block;
    padding: 0.45em 0.8em;
    color: var(--color-text);
    background: transparent;
    border: 1px solid currentColor;
    font-family: var(--font-ui);
    font-size: 0.76rem;
    font-weight: 500;
    line-height: 1.35;
    letter-spacing: 0.02em;
    list-style: none;
    cursor: pointer;
    transition: opacity 0.15s ease;
}

.article-reveal>summary::-webkit-details-marker {
    display: none;
}

.article-reveal>summary::marker {
    content: '';
}

.article-reveal>summary:hover {
    opacity: 0.62;
}

.article-reveal>summary:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

.article-reveal-content>:last-child {
    margin-bottom: 0;
}

.article-reveal-content {
    text-align: left;
}

.article-reveal-content::before {
    display: block;
    height: 1.15em;
    content: '';
}

.article-reveal.is-tweening>.article-reveal-content {
    overflow: hidden;
    will-change: height, opacity;
}

.article-body p {
    margin-bottom: 1.4em;
}

.article-body>.article-dropcap::first-letter {
    float: left;
    margin: -0.05em 0.05em 0 0;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 2em;
    font-weight: 600;
    line-height: 0.72;
}

.article-body h2 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-top: 2.2em;
    margin-bottom: 0.6em;
    letter-spacing: -0.01em;
}

.article-body h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-top: 1.8em;
    margin-bottom: 0.5em;
}

.article-body blockquote {
    border-left: 2px solid var(--color-rule);
    padding-left: 20px;
    margin: 1.6em 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.article-body ul,
.article-body ol {
    padding-left: 1.4em;
    margin-bottom: 1.4em;
}

.article-body li {
    margin-bottom: 0.4em;
}

.article-body a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.article-body em {
    font-style: italic;
}

.article-body strong {
    font-weight: 600;
}

.article-body pre {
    background: var(--color-input-bg);
    border: 1px solid var(--color-rule);
    padding: 16px 20px;
    overflow-x: auto;
    margin-bottom: 1.4em;
    font-size: 0.9rem;
    line-height: 1.5;
}

.article-body code {
    font-size: 0.9em;
}

.article-body hr {
    border: none;
    border-top: 1px solid var(--color-rule);
    margin: 2.4em 0;
}

/* KaTeX math typography and responsiveness */
.article-body .katex-display,
.preview-article .katex-display,
.article-list .katex-display,
.preview-article-list .katex-display {
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0.5em 0;
    margin: 1.6em 0;
    max-width: 100%;
    -webkit-overflow-scrolling: touch;
}

.article-list .katex-display,
.preview-article-list .katex-display {
    padding: 0.25em 0;
    margin: 0.6em 0;
}

.article-body .katex,
.preview-article .katex,
.article-list .katex,
.preview-article-list .katex {
    font-size: 1.05em;
    text-rendering: auto;
}

[data-theme="dark"] .katex {
    color: var(--color-text);
}

.article-back {
    display: inline-block;
    margin-bottom: 32px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.02em;
}

.article-back::before {
    content: '←';
    margin-right: 6px;
}

@media (max-width: 840px) {
    .article-date-badge {
        position: static;
        margin-bottom: 24px;
    }
}

@media (max-width: 1100px) {
    [data-content-width="wide"] .article-date-badge {
        position: static;
        margin-bottom: 24px;
    }
}

@media (max-width: 1380px) {
    [data-content-width="full"] .article-date-badge {
        position: static;
        margin-bottom: 24px;
    }
}

@media (max-width: 720px) {
    .article-title {
        font-size: 2rem;
    }

    .article-subtitle {
        font-size: 1.15rem;
    }

    .article-body {
        font-size: 1.08rem;
    }

    .article-list-title {
        font-size: 1.25rem;
    }

    .article-list-subtitle {
        font-size: 1rem;
    }

    .article-body .article-image-align-left,
    .article-body .article-image-align-right {
        float: none;
        max-width: 100%;
        margin-right: auto;
        margin-left: auto;
    }

    .article-body .article-image-wide,
    .preview-article .article-image-wide {
        left: auto;
        max-width: 100%;
        transform: none;
    }
}

@media (hover: none),
(pointer: coarse) {
    .article-read-tooltip {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {

    .article-read-tooltip,
    .article-read-tooltip.is-visible {
        animation: none;
        transition: none;
        transform: none;
    }
}