/* =========================================================
   Screen-specific styles — Home, Article, Projects, Tools
   ========================================================= */

/* ----- Shared screen frame ----- */
.screen {
    width: 100%;
    background: var(--paper);
    color: var(--ink);
    border: 1px solid var(--rule);
    border-radius: 12px;
    overflow: hidden;
    font-family: var(--font-serif);
}

.scroll {
    max-width: 100vw;
    max-height: calc(100vh - 4.1rem);
    overflow: auto;
}

.profile {
    display: flex;
    position: relative;
    width: 4.5rem;
    height: 4.5rem;
    flex-shrink: 0;
    user-select: none;
}

.bubble {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    animation: spin infinite 15s linear;
    -webkit-user-drag: none;
    filter: var(--bubble-filter);
    transition: filter 0.3s ease;
}

.portrait {
    position: absolute;
    top: 10%;
    left: 10%;
    width: 80%;
    border-radius: 100%;
    -webkit-user-drag: none;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* =========================================================
   HOME — two-column editorial
   ========================================================= */
.home {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 0;
    padding: 0;
}
.home .main {
    padding: 2rem;
    border-right: 1px solid var(--rule);
}
.home .side {
    padding: 48px 32px 64px;
    background: var(--paper-2);
}

.hero {
    padding: 0 0 48px;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 40px;
    position: relative;
}
.hero .tagline {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}
.pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--marker-green);
    box-shadow: 0 0 0 4px
        color-mix(in oklab, var(--marker-green) 22%, transparent);
    animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
    50% {
        box-shadow: 0 0 0 7px
            color-mix(in oklab, var(--marker-green) 0%, transparent);
    }
}

.hero h1 {
    margin: 12px 0 20px;
}
.hero p.lead {
    font-family: var(--font-serif);
    font-size: 19px;
    line-height: 1.6;
    color: var(--ink-2);
    max-width: 58ch;
}
.hero p.lead em {
    color: var(--accent);
    font-style: italic;
}

.hero .meta-row {
    display: flex;
    gap: 24px;
    margin-top: 28px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ink-3);
}
.hero .meta-row span b {
    color: var(--ink);
    font-weight: 500;
}

/* Post list */
.post-list {
    display: flex;
    flex-direction: column;
    background-color: var(--paper);
    padding: 24px;
    padding-top: 0;
}
.post-item {
    display: grid;
    grid-template-columns: 96px 1fr auto;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--rule);
    text-decoration: none;
    color: inherit;
    transition: background 0.15s;
    cursor: pointer;
}
.post-item:hover {
    background: linear-gradient(
        to right,
        transparent,
        var(--paper-2) 30%,
        var(--paper-2) 70%,
        transparent
    );
}
.post-item .date {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-4);
    padding-top: 6px;
    letter-spacing: 0.02em;
}
.post-item .title {
    font-family: var(--font-serif);
    font-size: 21px;
    font-weight: 500;
    line-height: 1.3;
    margin: 0 0 6px;
    color: var(--ink);
    letter-spacing: -0.01em;
}
.post-item .desc {
    font-size: 14.5px;
    color: var(--ink-3);
    margin: 0 0 10px;
    line-height: 1.55;
}
.post-item .meta {
    display: flex;
    gap: 10px;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-4);
}
.post-item .meta .dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--ink-4);
}
.post-item .reading {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-4);
    padding-top: 6px;
    align-self: start;
    white-space: nowrap;
}

/* Side column */
.side-card {
    padding-bottom: 32px;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 32px;
}
.side-card:last-child {
    border-bottom: 0;
}
.side-card h3 {
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-3);
    margin: 0 0 16px;
}

.about-card {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 14px;
    align-items: start;
    margin-bottom: 18px;
}
.about-card .avatar {
    width: 56px;
    height: 56px;
    border-radius: 10px;
    background: linear-gradient(135deg, #0a6cff 0%, #6b7eff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 600;
    color: white;
    font-size: 20px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}
.about-card .who .name {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 17px;
    color: var(--ink);
}
.about-card .who .role {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
}
.about-text {
    font-size: 14px;
    color: var(--ink-2);
    line-height: 1.6;
    margin: 0 0 14px;
}

.now-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.now-item {
    display: flex;
    gap: 10px;
    align-items: baseline;
    font-size: 13.5px;
    color: var(--ink-2);
}
.now-item .label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-4);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    min-width: 56px;
}

/* Topics cloud */
.topics {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.topics .tag {
    cursor: pointer;
    transition: all 0.15s;
}
.topics .tag:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* Series card */
.series-card {
    border: 1px solid var(--rule);
    border-radius: 10px;
    padding: 16px;
    background: var(--paper);
    transition:
        border-color 0.15s,
        box-shadow 0.15s;
    cursor: pointer;
}
.series-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-2);
}
.series-card .count {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-4);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.series-card .t {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 15.5px;
    color: var(--ink);
    margin: 6px 0 6px;
    line-height: 1.3;
}
.series-card .d {
    font-size: 12.5px;
    color: var(--ink-3);
    line-height: 1.5;
}
.series-card .bar {
    display: flex;
    gap: 3px;
    margin-top: 12px;
}
.series-card .bar span {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: var(--rule);
}
.series-card .bar span.on {
    background: var(--accent);
}

/* =========================================================
   ARTICLE
   ========================================================= */
.article {
    display: grid;
    grid-template-columns: 220px 1fr 200px;
    gap: 0;
    position: relative;
}
.article .progress {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: transparent;
}
.article .progress .fill {
    height: 100%;
    background: var(--accent);
    width: 42%;
}

.toc {
    padding: 48px 16px 48px 28px;
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    font-family: var(--font-sans);
    position: sticky;
    top: 64px;
    align-self: start;
}
.toc .label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-4);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 14px;
}
.toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.toc ul li a {
    display: block;
    padding: 6px 10px;
    border-left: 2px solid var(--rule);
    color: var(--ink-3);
    font-size: 13px;
    text-decoration: none;
    line-height: 1.4;
    transition: all 0.15s;
}
.toc ul li a:hover {
    color: var(--ink);
    border-left-color: var(--ink-4);
}
.toc ul li.sub a {
    padding-left: 22px;
    font-size: 12px;
}
.toc ul li a.active {
    color: var(--accent);
    border-left-color: var(--accent);
    background: var(--accent-soft);
}

.article .main {
    padding: 48px 56px 80px;
    width: 840px;
    margin: 0 auto;
    border: 1px solid var(--rule);
    border-top: 0;
    background-color: var(--paper);
}
.article .margins {
    padding: 48px 24px 48px 0;
    border-left: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
    line-height: 1.5;
}

.article-head {
    margin-bottom: 36px;
}
.article-head .cat {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.article-head h1 {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 38px;
    line-height: 1.12;
    letter-spacing: -0.02em;
    margin: 12px 0 18px;
}
.article-head .sub {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 19px;
    color: var(--ink-3);
    line-height: 1.5;
    margin: 0 0 24px;
}
.article-head .byline {
    display: flex;
    gap: 16px;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--ink-3);
    padding-top: 16px;
    border-top: 1px solid var(--rule);
}
.article-head .byline .dot {
    width: 3px;
    height: 3px;
    background: var(--ink-4);
    border-radius: 50%;
}

/* Prose */
.prose p {
    font-family: var(--font-serif);
    font-size: 17.5px;
    line-height: 1.75;
    margin: 0 0 18px;
    color: var(--ink-2);
}
.prose p.lead {
    font-size: 19px;
    color: var(--ink);
}
.prose h2 {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 24px;
    line-height: 1.2;
    margin: 44px 0 14px;
    letter-spacing: -0.01em;
    display: flex;
    align-items: baseline;
    gap: 14px;
}
.prose h2::before {
    content: attr(data-num);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ink-4);
    font-weight: 400;
    min-width: 22px;
}
.prose h3 {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 18.5px;
    margin: 26px 0 10px;
}
.prose a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid color-mix(in oklab, var(--accent) 40%, transparent);
}
.prose a:hover {
    border-bottom-color: var(--accent);
}
.prose em {
    font-style: italic;
}
.prose strong {
    font-weight: 600;
    color: var(--ink);
}
.prose .footnote-ref {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--accent);
    vertical-align: super;
    border: 0;
    padding: 0 2px;
}

/* Code block */
.codeblock {
    background: var(--code-bg);
    border-radius: 10px;
    margin: 22px -12px;
    overflow: hidden;
    box-shadow: var(--shadow-2);
    font-family: var(--font-mono);
}
.codeblock .cb-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--code-line);
    font-size: 11px;
    color: var(--code-dim);
}
.codeblock .cb-head .file {
    color: #94a3b8;
}
.codeblock .cb-head .lang {
    color: var(--accent-2);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 10px;
}
.codeblock pre {
    margin: 0;
    padding: 16px 18px 18px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.65;
    color: var(--code-fg);
    overflow-x: auto;
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 16px;
}
.codeblock pre .ln {
    color: var(--code-dim);
    text-align: right;
    user-select: none;
}
.codeblock pre code {
    white-space: pre;
}

/* math display */
.math {
    display: block;
    font-family: "Latin Modern Math", "Cambria Math", serif;
    font-style: italic;
    font-size: 19px;
    text-align: center;
    color: var(--ink);
    padding: 16px 0;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    margin: 20px 0;
    background: var(--paper-2);
    position: relative;
}
.math .eq-num {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: 11px;
    font-style: normal;
    color: var(--ink-4);
}
.math sup {
    font-size: 0.7em;
    vertical-align: super;
}
.math sub {
    font-size: 0.7em;
    vertical-align: sub;
}

/* blockquote */
.prose blockquote {
    border-left: 3px solid var(--accent);
    padding: 4px 0 4px 20px;
    margin: 22px 0;
    color: var(--ink-2);
    font-style: italic;
    font-size: 17px;
    line-height: 1.6;
}

/* SVG diagram frame */
.diagram {
    margin: 28px -12px;
    padding: 18px 20px 12px;
    border: 1px solid var(--rule);
    border-radius: 10px;
    background:
        linear-gradient(to right, var(--rule-2) 1px, transparent 1px),
        linear-gradient(to bottom, var(--rule-2) 1px, transparent 1px);
    background-size: 20px 20px;
    background-color: var(--paper);
}
.diagram .cap {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: 0.04em;
    margin-top: 10px;
    text-align: center;
}
.diagram .cap b {
    color: var(--ink);
    font-weight: 600;
    margin-right: 6px;
}

/* References */
.refs {
    margin-top: 60px;
    padding-top: 28px;
    border-top: 2px solid var(--ink);
}
.refs h3 {
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-3);
    margin: 0 0 14px;
}
.refs ol {
    margin: 0;
    padding-left: 24px;
    font-family: var(--font-serif);
    font-size: 14px;
    color: var(--ink-2);
    line-height: 1.55;
}
.refs ol li {
    margin-bottom: 8px;
    counter-increment: ref;
}
.refs ol li a {
    color: var(--accent);
    text-decoration: none;
}

/* margin notes */
.margin-note {
    margin-bottom: 32px;
    padding-left: 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
    line-height: 1.55;
}
.margin-note .tag-n {
    display: inline-block;
    font-size: 9px;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 3px;
    padding: 1px 5px;
    margin-bottom: 6px;
    letter-spacing: 0.06em;
}
.margin-note b {
    color: var(--ink);
    font-weight: 500;
}

/* =========================================================
   PROJECTS
   ========================================================= */
.projects {
    max-height: calc(100vh - 8.1rem);
    overflow: scroll;
    padding: 2rem;
}
.projects-head {
    margin-bottom: 36px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 28px;
}
.projects-head .t h1 {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 42px;
    margin: 8px 0 10px;
    letter-spacing: -0.02em;
}
.projects-head .t p {
    font-family: var(--font-serif);
    font-size: 16.5px;
    color: var(--ink-3);
    max-width: 52ch;
    margin: 0;
}
.projects-head .stats {
    display: flex;
    gap: 28px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
}
.projects-head .stats .num {
    font-family: var(--font-serif);
    font-size: 28px;
    color: var(--ink);
    font-weight: 400;
    display: block;
    line-height: 1;
    margin-bottom: 4px;
}

.repo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.repo-card {
    border: 1px solid var(--rule);
    border-radius: 10px;
    padding: 20px;
    background: var(--paper);
    transition: all 0.15s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    min-height: 170px;
}
.repo-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-2);
    transform: translateY(-1px);
}
.repo-card .row-top {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 8px;
}
.repo-card .name {
    font-family: var(--font-mono);
    font-size: 14.5px;
    color: var(--accent);
    font-weight: 500;
}
.repo-card .docs {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-4);
    padding: 2px 8px;
    border: 1px solid var(--rule);
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.repo-card .view {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-4);
    padding: 2px 8px;
    border: 1px solid var(--rule);
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.repo-card .vis {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-4);
    padding: 2px 8px;
    border: 1px solid var(--rule);
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.repo-card .desc {
    font-family: var(--font-serif);
    font-size: 14.5px;
    color: var(--ink-2);
    line-height: 1.5;
    flex: 1;
    margin: 0 0 16px;
}
.repo-card .foot {
    display: flex;
    gap: 16px;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
}
.repo-card .lang-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

/* Featured project card */
.featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 0;
    padding: 0;
    overflow: hidden;
    min-height: 260px;
}
.featured .info {
    padding: 28px 28px 24px;
    display: flex;
    flex-direction: column;
}
.featured .preview {
    background: var(--paper-2);
    border-left: 1px solid var(--rule);
    padding: 24px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.featured .star {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
    display: flex;
    align-items: center;
    gap: 4px;
}
.featured .tag-row {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: 12px;
}

/* Contribution graph */
.contribution-graph {
    margin-bottom: 28px;
    padding: 16px 18px;
    border: 1px solid var(--rule);
    border-radius: 10px;
}
.contribution-graph .header {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
}
.contribution-graph .legend {
    display: inline-flex;
    gap: 2px;
}
.contribution-graph .legend span {
    width: 9px;
    height: 9px;
    border-radius: 2px;
}
.graph-grid {
    display: grid;
    grid-template-columns: repeat(52, 1fr);
    grid-template-rows: repeat(7, 11px);
    gap: 2px;
}
.graph-grid span {
    border-radius: 2px;
}

/* =========================================================
   TOOL / DS DEMO
   ========================================================= */
.tool {
    padding: 2rem;
    max-height: calc(100vh - 8.1rem);
    overflow: scroll;
}
.tool-head {
    margin-bottom: 24px;
}
.tool-head h1 {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 32px;
    margin: 4px 0 8px;
}
.tool-head p {
    font-family: var(--font-serif);
    font-size: 15.5px;
    color: var(--ink-3);
    margin: 0;
    max-width: 64ch;
}

.tool-grid {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 20px;
}

.stage {
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 12px;
    padding: 22px;
    min-height: 440px;
    position: relative;
    background-image:
        linear-gradient(to right, var(--rule-2) 1px, transparent 1px),
        linear-gradient(to bottom, var(--rule-2) 1px, transparent 1px);
    background-size: 24px 24px;
}
.stage .stage-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
}
.stage .stage-head .badge {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 3px 8px;
    border-radius: 4px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.side-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.panel {
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 10px;
    padding: 16px;
}
.panel h4 {
    font-family: var(--font-sans);
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-3);
    margin: 0 0 12px;
}
.panel .row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-family: var(--font-mono);
    font-size: 12px;
}
.panel .row + .row {
    border-top: 1px dashed var(--rule);
}
.panel .row .k {
    color: var(--ink-3);
}
.panel .row .v {
    color: var(--ink);
    font-weight: 500;
}
.panel .row .v.hi {
    color: var(--accent);
}

/* Sequence ribbon */
.sequence-ribbon {
    margin-top: 16px;
    padding: 10px 12px;
    background: var(--paper-2);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
}
.sequence-ribbon .ribbon-label {
    font-size: 10px;
    color: var(--ink-4);
    letter-spacing: 0.1em;
    margin-bottom: 6px;
}
.sequence-ribbon .sequence {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}
.sequence-ribbon .seq-item {
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--rule);
    background: var(--paper);
    color: var(--ink-3);
    transition: all 0.2s;
}
.sequence-ribbon .seq-item.visited {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent-2);
}
.sequence-ribbon .seq-item.current {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    font-weight: 600;
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--rule);
    background: var(--paper);
    color: var(--ink);
    cursor: pointer;
    transition: all 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.btn:hover {
    border-color: var(--ink-4);
    background: var(--paper-2);
}
.btn.primary {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}
.btn.primary:hover {
    background: var(--accent-2);
    border-color: var(--accent-2);
}
.btn.sm {
    font-size: 12px;
    padding: 6px 10px;
}
.btn-group {
    display: inline-flex;
    border: 1px solid var(--rule);
    border-radius: 8px;
    overflow: hidden;
}
.btn-group .btn {
    border: 0;
    border-radius: 0;
    background: var(--paper);
}
.btn-group .btn.on {
    background: var(--ink);
    color: var(--paper);
}
.btn-group .btn + .btn {
    border-left: 1px solid var(--rule);
}

/* =========================================================
   SLIDER
   ========================================================= */
.slider {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.slider input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--rule);
    border-radius: 4px;
    outline: none;
}
.slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 16%, transparent);
}
.slider input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 0;
}
.slider .head {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
}

/* =========================================================
   TWEAKS PANEL
   ========================================================= */
.tweaks {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 2000;
    width: 280px;
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 12px;
    box-shadow: 0 20px 50px -12px rgba(15, 23, 42, 0.25);
    font-family: var(--font-sans);
    overflow: hidden;
}
.tweaks .hd {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-2);
}
.tweaks .hd .t {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
.tweaks .hd .x {
    background: transparent;
    border: 0;
    color: var(--ink-3);
    cursor: pointer;
    padding: 4px;
}
.tweaks .body {
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.tweaks .field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.tweaks .field .lab {
    font-size: 12px;
    color: var(--ink-2);
    display: flex;
    justify-content: space-between;
}
.tweaks .field .lab .val {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
}
.tweaks .seg {
    display: flex;
    border: 1px solid var(--rule);
    border-radius: 7px;
    overflow: hidden;
}
.tweaks .seg button {
    flex: 1;
    padding: 6px 8px;
    background: var(--paper);
    border: 0;
    font-family: var(--font-sans);
    font-size: 11px;
    color: var(--ink-3);
    cursor: pointer;
    border-right: 1px solid var(--rule);
}
.tweaks .seg button:last-child {
    border-right: 0;
}
.tweaks .seg button.on {
    background: var(--ink);
    color: var(--paper);
}

/* Density-driven (overrides) */
[data-density="compact"] .post-item {
    padding: 16px 0;
}
[data-density="compact"] .post-item .title {
    font-size: 18px;
}
[data-density="compact"] .post-item .desc {
    font-size: 13.5px;
    margin-bottom: 6px;
}
[data-density="compact"] .home .main {
    padding: 36px 40px 48px;
}
[data-density="compact"] .home .side {
    padding: 36px 24px 48px;
}
[data-density="compact"] .hero {
    padding: 28px 0 36px;
    margin-bottom: 28px;
}

/* =========================================================
   FILTER ROW
   ========================================================= */
.filter-row {
    grid-column: span 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    margin: 8px 0 0;
}
.filter-row .filters {
    display: flex;
    gap: 6px;
}
.filter-row .sort {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
}
.filter-row .sort b {
    color: var(--ink);
}

/* =========================================================
   SEARCH
   ========================================================= */
.search-container {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding-top: 120px;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
}
.search-container.active {
    display: flex;
}
.search-wrapper {
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 12px;
    box-shadow: 0 20px 50px -12px rgba(15, 23, 42, 0.35);
    width: 100%;
    max-width: 580px;
    overflow: hidden;
}
.search-input {
    width: 100%;
    padding: 16px 20px;
    border: 0;
    border-bottom: 1px solid var(--rule);
    font-family: var(--font-serif);
    font-size: 18px;
    background: transparent;
    color: var(--ink);
    outline: none;
}
.search-input::placeholder {
    color: var(--ink-4);
}
.search-close {
    position: absolute;
    right: 20px;
    top: 16px;
    background: transparent;
    border: 0;
    color: var(--ink-3);
    cursor: pointer;
    font-size: 18px;
}
.search-results {
    max-height: 400px;
    overflow-y: auto;
}
.search-results-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.search-result-item {
    border-bottom: 1px solid var(--rule);
}
.search-result-item:last-child {
    border-bottom: 0;
}
.search-result-link {
    display: block;
    padding: 16px 20px;
    text-decoration: none;
    color: inherit;
    transition: background 0.15s;
}
.search-result-link:hover {
    background: var(--paper-2);
}
.search-result-title {
    font-family: var(--font-serif);
    font-size: 16px;
    color: var(--ink);
    display: block;
    margin-bottom: 4px;
}
.search-result-excerpt {
    font-size: 13px;
    color: var(--ink-3);
    display: block;
}
.search-result-categories {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-4);
    display: block;
    margin-top: 4px;
}
.search-no-results {
    padding: 24px 20px;
    text-align: center;
    color: var(--ink-3);
    font-family: var(--font-serif);
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
    border-top: 1px solid var(--rule);
    padding: 32px 0;
    background-color: var(--paper);
    margin-top: 48px;
}
.footer-col {
    margin-bottom: 16px;
}
.footer-col .p-name {
    font-family: var(--font-serif);
    font-weight: 500;
    color: var(--ink);
    text-decoration: none;
}
.footer-col .u-email {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--ink-3);
}
.site-footer > p {
    font-size: 14px;
    color: var(--ink-3);
    margin: 0 0 16px;
}
.social-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.social-links a {
    color: var(--ink-3);
    font-size: 18px;
    transition: color 0.15s;
}
.social-links a:hover {
    color: var(--accent);
}

/* =========================================================
   PAGINATION
   ========================================================= */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 32px 0;
    border-top: 1px solid var(--rule);
    margin-top: 48px;
}
.pagination .page {
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--rule);
    color: var(--ink-3);
    text-decoration: none;
    transition: all 0.15s;
}
.pagination .page:hover {
    border-color: var(--ink-4);
    color: var(--ink);
}
.pagination .page.current {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}
.pagination .page.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.pagination .previous,
.pagination .next {
    padding: 8px 14px;
}

/* =========================================================
   POST CONTAINER (legacy compatibility)
   ========================================================= */
.post-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px 0;
}
.post-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--rule);
}
.post-title {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 400;
    color: var(--ink);
    text-decoration: none;
    display: block;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}
.post-info {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ink-4);
}
.post-content {
    font-size: 17px;
    line-height: 1.75;
    color: var(--ink-2);
}
.post-content p {
    margin: 0 0 18px;
}
.post-footer {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ink-3);
}