:root {
    --paper: #f7f5f0;
    --surface: #fffdf9;
    --ink: #20252b;
    --muted: #737a83;
    --faint: #a6adb4;
    --line: #e3e1db;
    --accent: #245b70;
    --accent-soft: #e5eff0;
    --code: #222b33;
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 15% 0%, rgba(225, 236, 233, .55), transparent 27rem),
        var(--paper);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: #153f4e;
}

.site-header {
    border-bottom: 1px solid rgba(227, 225, 219, .8);
    background: rgba(247, 245, 240, .86);
    backdrop-filter: blur(14px);
}

.site-header__inner,
.site-main,
.site-footer__inner {
    width: min(920px, calc(100% - 2.5rem));
    margin: 0 auto;
}

.site-header__inner {
    display: flex;
    min-height: 76px;
    align-items: center;
    justify-content: space-between;
}

.site-brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    color: var(--ink);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -.02em;
}

.site-brand__mark {
    display: grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border-radius: 9px;
    color: #fff;
    background: var(--accent);
    font-family: Georgia, serif;
    font-size: 1.1rem;
}

.site-nav {
    display: flex;
    gap: 1.35rem;
    font-size: .88rem;
    font-weight: 600;
}

.site-nav a {
    color: var(--muted);
}

.site-nav a:hover {
    color: var(--accent);
}

.site-main {
    min-height: calc(100vh - 150px);
    padding: 4.5rem 0 6rem;
}

.home-intro {
    max-width: 680px;
    margin-bottom: 4.25rem;
}

.eyebrow,
.toc-label {
    margin: 0 0 .75rem;
    color: var(--accent);
    font-size: .7rem;
    font-weight: 800;
    letter-spacing: .16em;
}

h1,
h2,
h3 {
    color: var(--ink);
    line-height: 1.2;
    letter-spacing: -.04em;
}

.home-intro h1 {
    max-width: 650px;
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.8rem, 7vw, 5.2rem);
    font-weight: 500;
}

.home-intro__lead {
    max-width: 420px;
    margin: 1.35rem 0 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.intro-link,
.all-posts-link {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    margin-top: 1.4rem;
    padding-bottom: .15rem;
    border-bottom: 1px solid #9ab9bc;
    font-size: .86rem;
    font-weight: 700;
}

.intro-link span,
.all-posts-link span {
    transition: transform .2s ease;
}

.intro-link:hover span,
.all-posts-link:hover span {
    transform: translateX(4px);
}

.section-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 1.1rem;
    border-bottom: 1px solid var(--line);
}

.section-heading h2 {
    margin: 0 0 .8rem;
    font-size: 1.15rem;
}

.section-heading span {
    color: var(--faint);
    font-size: .8rem;
}

.post-list {
    display: grid;
}

.post-card {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 2rem;
    padding: 1.4rem 1rem 1.55rem 0;
    border-bottom: 1px solid var(--line);
    transition: padding-left .2s ease, background-color .2s ease;
}

.post-card:hover {
    padding-left: .8rem;
    background: rgba(255, 253, 249, .7);
}

.post-card__date {
    padding-top: .25rem;
    color: var(--faint);
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: .75rem;
}

.post-card__section {
    display: block;
    width: fit-content;
    margin-top: .45rem;
    padding: .1rem .45rem;
    border-radius: 4px;
    color: var(--accent);
    background: var(--accent-soft);
    font-family: Inter, ui-sans-serif, sans-serif;
    font-size: .68rem;
    letter-spacing: .04em;
}

.post-card h3 {
    margin: 0;
    font-size: 1.35rem;
}

.post-card h3 a {
    color: var(--ink);
}

.post-card h3 a:hover {
    color: var(--accent);
}

.post-card p {
    max-width: 650px;
    margin: .55rem 0 .8rem;
    color: var(--muted);
    font-size: .92rem;
}

.post-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 650px;
    color: var(--faint);
    font-family: Inter, ui-sans-serif, sans-serif;
    font-size: .75rem;
}

.read-more {
    font-size: .8rem;
    font-weight: 700;
}

.read-more span {
    display: inline-block;
    margin-left: .25rem;
    transition: transform .2s ease;
}

.read-more:hover span {
    transform: translate(3px, -3px);
}

.all-posts-link {
    margin-top: 2rem;
}

.archive-intro {
    margin-bottom: 3.7rem;
}

.archive-intro h1 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.8rem, 7vw, 4.8rem);
    font-weight: 500;
}

.archive-intro p:last-child {
    margin: 1rem 0 0;
    color: var(--muted);
}

.archive-list {
    border-top: 1px solid var(--line);
}

.archive-item {
    display: grid;
    grid-template-columns: 120px 1fr 65px;
    gap: 1.5rem;
    align-items: center;
    padding: 1.15rem 0;
    border-bottom: 1px solid var(--line);
}

.archive-item > time,
.archive-item__reading {
    color: var(--faint);
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: .75rem;
}

.archive-item__section {
    color: var(--accent);
    font-family: Inter, ui-sans-serif, sans-serif;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.archive-item h3 {
    margin: .25rem 0 0;
    font-size: 1.08rem;
}

.archive-item h3 a {
    color: var(--ink);
}

.archive-item h3 a:hover {
    color: var(--accent);
}

.archive-item__reading {
    text-align: right;
}

.post-header {
    max-width: 760px;
    margin-bottom: 2.75rem;
}

.post-header h1 {
    margin: 0 0 1.15rem;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    font-weight: 500;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem 1.25rem;
    color: var(--muted);
    font-size: .8rem;
}

.toc-container {
    width: min(100%, 680px);
    margin: 0 0 3rem;
    padding: 1.15rem 1.35rem;
    border: 1px solid #d6e2e1;
    border-left: 3px solid var(--accent);
    border-radius: 0 10px 10px 0;
    background: var(--accent-soft);
}

.toc-container .toc-label {
    margin-bottom: .35rem;
    color: var(--accent);
}

.toc-container ul {
    margin: 0;
    padding-left: 1.2rem;
    list-style: none;
}

.toc-container ul ul {
    padding-left: 1rem;
}

.toc-container a {
    display: block;
    padding: .12rem 0;
    color: #41646d;
    font-size: .86rem;
}

.article-content {
    max-width: 760px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.08rem;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    margin: 2.8rem 0 1rem;
    font-family: Inter, ui-sans-serif, sans-serif;
}

.article-content h2 {
    padding-top: 1.1rem;
    border-top: 1px solid var(--line);
    font-size: 1.55rem;
}

.article-content h3 {
    font-size: 1.2rem;
}

.article-content p {
    margin: 1.15rem 0;
}

.article-content a {
    text-decoration: underline;
    text-decoration-color: #a8c4c7;
    text-underline-offset: 3px;
}

.article-content img {
    display: block;
    width: auto;
    max-width: 100%;
    height: auto;
    margin: 1.8rem auto;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
    box-shadow: 0 14px 30px rgba(37, 48, 53, .1);
}

.article-content figure {
    margin: 2rem 0;
}

.article-content figcaption {
    color: var(--muted);
    text-align: center;
    font-family: Inter, ui-sans-serif, sans-serif;
    font-size: .8rem;
}

.article-content blockquote {
    margin: 1.8rem 0;
    padding: .8rem 1.3rem;
    border-left: 3px solid #a8c4c7;
    color: var(--muted);
    background: rgba(229, 239, 240, .55);
}

.article-content pre {
    overflow-x: auto;
    margin: 1.8rem 0;
    padding: 1.2rem 1.35rem;
    border-radius: 10px;
    color: #e7edf0;
    background: var(--code);
    font-size: .82rem;
    line-height: 1.65;
}

.article-content code {
    padding: .12rem .3rem;
    border-radius: 4px;
    color: #375964;
    background: #e8eeee;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: .84em;
}

.article-content pre code {
    padding: 0;
    color: inherit;
    background: transparent;
}

.article-content table {
    display: block;
    width: 100%;
    overflow-x: auto;
    border-collapse: collapse;
    margin: 1.8rem 0;
    font-family: Inter, ui-sans-serif, sans-serif;
    font-size: .88rem;
}

.article-content th,
.article-content td {
    min-width: 100px;
    padding: .65rem .8rem;
    border: 1px solid var(--line);
    text-align: left;
}

.article-content th {
    color: var(--ink);
    background: #ecebe5;
}

.site-footer {
    color: var(--faint);
    font-size: .75rem;
}

.site-footer__inner {
    display: flex;
    gap: .6rem;
    padding: 1.4rem 0 2.5rem;
    border-top: 1px solid var(--line);
}

@media (min-width: 1200px) {
    .toc-container {
        position: fixed;
        top: 120px;
        right: max(2rem, calc((100vw - 920px) / 2 - 285px));
        width: 250px;
        max-height: 70vh;
        overflow-y: auto;
    }
}

@media (max-width: 640px) {
    .site-header__inner,
    .site-main,
    .site-footer__inner {
        width: min(100% - 2rem, 920px);
    }

    .site-header__inner {
        min-height: 64px;
    }

    .site-nav {
        gap: .8rem;
    }

    .site-main {
        padding: 3rem 0 4rem;
    }

    .home-intro {
        margin-bottom: 3.5rem;
    }

    .post-card {
        display: block;
        padding: 1.3rem 0 1.45rem;
    }

    .post-card:hover {
        padding-left: 0;
        background: transparent;
    }

    .post-card__date {
        display: flex;
        align-items: center;
        gap: .65rem;
        margin-bottom: .35rem;
    }

    .post-card__section {
        display: inline-block;
        margin-top: 0;
    }

    .post-card h3 {
        font-size: 1.2rem;
    }

    .post-card p {
        margin-top: .45rem;
        font-size: .88rem;
    }

    .archive-item {
        grid-template-columns: 1fr auto;
        gap: .2rem 1rem;
        align-items: start;
    }

    .archive-item > time {
        grid-column: 1;
        grid-row: 1;
    }

    .archive-item__reading {
        grid-column: 2;
        grid-row: 1;
    }

    .archive-item > div {
        grid-column: 1 / -1;
        grid-row: 2;
    }

    .archive-item h3 {
        font-size: 1rem;
    }

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

    .toc-container {
        margin-bottom: 2.3rem;
    }
}