/* Ocean journal: one token system, shared across discovery and long-form reading. */
:root {
  --bg:#f8fafd; --card:#fff; --text:#182c46; --muted:#52677d; --blue:#235fd3;
  --line:#dfe8f3; --soft:#edf3fc; --accent:#235fd3; --accent-line:#a8c5f0; --accent-soft:#e9f1ff;
  --code:#142337; --header:rgba(255,255,255,.94); --shadow:0 12px 34px #1e4d870d;
  --header-height:76px; --prose-size:18px; --radius:16px;
  font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  color-scheme:light;
}
:root[data-theme=dark] {
  --bg:#0c1421; --card:#121f30; --text:#e3edf9; --muted:#a4b7ce; --blue:#8db9ff;
  --line:#2a3c54; --soft:#192a40; --accent:#8db9ff; --accent-line:#4a6c98; --accent-soft:#1c3452;
  --code:#08111e; --header:rgba(12,20,33,.94); --shadow:0 14px 40px #0003;
  color-scheme:dark;
}
* {box-sizing:border-box}
[hidden] {display:none!important}
html {scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 24px)}
body {margin:0;background:var(--bg);color:var(--text);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
a {color:inherit;text-decoration:none}
button,input,select {font:inherit;color:inherit}
button {cursor:pointer}
button,a,input,summary,select {-webkit-tap-highlight-color:transparent}
a,button {touch-action:manipulation}
button {border:1px solid var(--line);background:var(--card);border-radius:9px;min-height:44px;padding:7px 14px}
button:hover {background:var(--soft)}
button:disabled {opacity:.45;cursor:default}
:where(a,button,input,select,summary,[tabindex]):focus-visible {outline:3px solid var(--blue);outline-offset:4px}
::selection {background:#cbdfff;color:#122d54}
.wrap {width:min(1240px,calc(100% - 80px));margin-inline:auto}
.sr-only {position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip-path:inset(50%)}
.skip {position:fixed;left:16px;top:-100px;z-index:100;padding:10px 16px;background:var(--card);border:1px solid var(--blue);border-radius:8px}
.skip:focus {top:12px}
.eyebrow {font-size:12px;font-weight:650;letter-spacing:.14em;color:var(--blue);margin:0;line-height:1.6}
.text-link {display:inline-flex;align-items:center;gap:12px;font-size:14px;color:var(--blue);font-weight:550;min-height:44px}
.text-link:hover {text-decoration:underline;text-underline-offset:5px}
.count {font:13px ui-monospace,monospace;vertical-align:super;color:var(--muted);margin-left:12px;letter-spacing:0}
.keep {white-space:nowrap}
.header {height:var(--header-height);position:sticky;top:0;z-index:40;background:var(--header);border-bottom:1px solid var(--line);backdrop-filter:blur(18px)}
.header-inner {width:min(1340px,calc(100% - 64px));height:100%;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:20px}
.brand {display:flex;align-items:center;gap:12px;font-size:23px;line-height:1.25;font-weight:750;letter-spacing:-.8px}
.brand-icon {width:38px;height:40px;border:1px solid var(--accent-line);background:var(--accent-soft);color:var(--blue);border-radius:13px 13px 13px 3px;display:grid;place-content:center;font-size:24px;font-family:Georgia,serif}
.brand-icon>span {display:none}
.brand-caption {display:block;font-size:11px;letter-spacing:.09em;font-weight:400;color:var(--muted);margin-top:5px}
.header nav {display:flex;align-items:center;gap:7px;font-size:14px}
.header nav>a {min-height:44px;padding:9px 14px;display:inline-flex;align-items:center;border-radius:9px;white-space:nowrap}
.header nav>a:hover,.header nav>a[aria-current] {color:var(--blue);background:var(--soft)}
.header .nav-github {color:var(--muted);gap:6px}
.search-trigger {display:flex;align-items:center;gap:10px;min-width:130px;margin-left:10px;font-size:14px;color:var(--muted);background:var(--soft)}
.search-trigger svg,.icon-button svg,.bookmark-button svg {width:19px;height:19px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round}
kbd {font:12px ui-monospace,monospace;border:1px solid var(--line);background:var(--card);border-radius:4px;padding:0 5px;margin-left:auto;color:var(--muted)}
.icon-button {width:44px;height:44px;min-width:44px;padding:0;display:inline-grid;place-items:center;border:0;background:transparent;font-size:24px}
.sun {display:none}
:root[data-theme=dark] .sun {display:block}
:root[data-theme=dark] .moon {display:none}
.menu-toggle {display:none}
.footer {display:flex;justify-content:space-between;align-items:center;gap:24px;border-top:1px solid var(--line);padding-block:32px;margin-top:24px;font-size:13px;color:var(--muted)}
.footer-brand {font-size:18px;font-weight:650;display:flex;flex-direction:column;color:var(--text)}
.footer-brand span {font-size:12px;font-weight:400;color:var(--muted)}
.footer>div {display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px 20px;max-width:750px}
.footer a {min-height:36px;display:inline-flex;align-items:center}
.footer a:hover {color:var(--blue)}
.footer>div>span {flex-basis:100%;text-align:right;font-size:12px}
/* Home: an illustrated masthead followed by a practical journal and topic shelf. */
.hero {position:relative;isolation:isolate;overflow:hidden;margin-top:30px;min-height:488px;border:1px solid var(--line);border-radius:26px;background:var(--card);box-shadow:0 18px 50px #1e4d8712}
.hero-copy {position:relative;z-index:2;width:49%;padding:47px 0 43px 48px}
.hero h1 {font-size:clamp(38px,4.2vw,57px);letter-spacing:-1.5px;line-height:1.22;font-weight:760;margin:22px 0}
.hero h1>span {display:block;color:var(--blue)}
.hero-description {font-size:16px;line-height:1.85;color:var(--muted);margin:0}
.hero-actions {display:flex;align-items:center;flex-wrap:wrap;gap:24px;margin-top:26px}
.button-primary {display:inline-flex;justify-content:center;align-items:center;gap:25px;min-height:48px;padding:11px 22px;background:#235fd3;color:#fff;border:1px solid #235fd3;border-radius:10px;font-size:14px;font-weight:600;box-shadow:0 6px 16px #235fd321}
.button-primary:hover {background:#194eb6;transform:translateY(-1px)}
.hero-stats {display:flex;align-items:center;gap:23px;margin-top:29px;font-size:12px;color:var(--muted)}
.hero-stats strong {font:600 18px ui-monospace,monospace;margin-right:5px;color:var(--text)}
.hero-stats a {border-left:1px solid var(--line);padding-left:23px;min-height:32px;display:flex;align-items:center}
.hero-art {position:absolute;inset:0;z-index:0}
.hero-art img {width:100%;height:100%;object-fit:cover;object-position:70% top;display:block}
.hero-art:after {content:'';position:absolute;inset:0;background:linear-gradient(90deg,#fff 0%,#fffffff5 22%,#ffffffd9 33%,#ffffff85 44%,#ffffff18 54%,transparent 62%)}
.hero-caption {position:absolute;bottom:20px;right:25px;z-index:2;font:10px ui-monospace,monospace;letter-spacing:.12em;color:#274e77;background:#ffffffbf;padding:5px 10px;border-radius:5px}
:root[data-theme=dark] .hero-art img {filter:brightness(.82) saturate(.92)}
:root[data-theme=dark] .hero-art:after {background:linear-gradient(90deg,#121f30 0%,#121f30f5 23%,#121f30d9 34%,#121f3085 45%,#121f3018 58%,transparent 68%)}
:root[data-theme=dark] .hero-caption {color:#c2d7f3;background:#12243edb}
.home-entry {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:22px;gap:16px}
.home-entry>a {border:1px solid var(--line);border-radius:16px;background:var(--card);padding:22px 24px;display:flex;flex-direction:column;gap:6px;position:relative}
.home-entry>a:after {content:"↗";position:absolute;right:21px;top:16px;color:var(--accent-line);font-size:21px}
.home-entry>a:hover {background:var(--soft);border-color:var(--accent-line);transform:translateY(-2px)}
.home-entry>a>span:first-child {font:11px ui-monospace,monospace;color:var(--blue);letter-spacing:.09em}
.home-entry strong {font-size:17px;font-weight:650}
.home-entry>a>span:last-child {font-size:13px;color:var(--muted)}
.home-columns {display:grid;grid-template-columns:minmax(0,1fr) 318px;gap:36px;margin-top:48px;align-items:start}
.section-heading {display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-heading h2 {font-size:27px;letter-spacing:-.65px;line-height:1.4;margin:7px 0 0}
.article-list {display:grid;gap:18px}
.article-card {min-width:0;padding:26px 28px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);position:relative}
.article-card:focus-within,.article-card:hover {border-color:var(--accent-line);box-shadow:var(--shadow)}
.card-content {min-width:0}
.card-meta {display:flex;align-items:center;gap:10px;min-height:34px;font-size:12px;color:var(--muted)}
.card-category {color:var(--blue);font-weight:550}
.card-main {display:block}
.card-main h3 {font-size:22px;line-height:1.6;letter-spacing:-.35px;font-weight:650;margin:13px 0 10px;overflow-wrap:anywhere;text-wrap:pretty}
.card-main:hover h3 {color:var(--blue)}
.card-main p {color:var(--muted);font-size:14px;line-height:1.9;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-bottom {display:flex;align-items:center;gap:14px;font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:18px;flex-wrap:wrap}
.card-bottom>a {margin-left:auto;font-size:13px;color:var(--blue);min-height:32px;display:flex;gap:9px;align-items:center}
.article-tags {display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.content-tag {font-size:12px;line-height:1.5;min-height:28px;display:inline-flex;align-items:center;background:var(--soft);color:var(--muted);padding:4px 9px;border-radius:5px;border:1px solid transparent}
.content-tag:hover {color:var(--blue);border-color:var(--accent-line)}
.bookmark-button {display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:13px;background:transparent;border-color:transparent;min-height:40px;padding:6px 9px;color:var(--muted)}
.card-meta .bookmark-button {margin-left:auto;flex-shrink:0}
.bookmark-button[aria-pressed=true] {color:var(--blue);background:var(--accent-soft)}
.bookmark-button[aria-pressed=true] svg {fill:var(--accent-soft);stroke-width:2}
.read-badge {color:var(--blue);font-size:11px;border:1px solid var(--accent-line);padding:1px 5px;border-radius:4px;white-space:nowrap}
.home-sidebar {display:grid;gap:22px;margin-top:79px}
.sidebar-panel {border:1px solid var(--line);border-radius:var(--radius);padding:25px;background:var(--card)}
.sidebar-panel h2 {font-size:20px;margin:6px 0 18px;letter-spacing:-.4px}
.topic-tiles {display:grid;gap:2px}
.topic-tiles a {display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:45px;font-size:14px;border-bottom:1px solid var(--line)}
.topic-tiles a:last-child {border-bottom:0}
.topic-tiles a>span:last-child {color:var(--muted);font-size:12px;white-space:nowrap}
.topic-tiles b {font-weight:400;margin-left:9px;color:var(--blue)}
.topic-tiles a:hover {color:var(--blue)}
.atlas-teaser {background:linear-gradient(145deg,var(--accent-soft),var(--card));position:relative}
.atlas-teaser .mascot {float:right;width:65px;height:65px;margin:-12px -12px 0 0}
.atlas-teaser>p:not(.eyebrow) {font-size:13px;color:var(--muted);margin:-7px 0 18px}
.route-preview {display:grid;grid-template-columns:1fr auto;gap:5px 12px;padding:15px 0;border-top:1px solid var(--line)}
.route-preview>span:first-child {font-size:11px;color:var(--blue)}
.route-preview strong {grid-column:1;font-size:14px;font-weight:550;line-height:1.7}
.route-preview>span:last-child {grid-column:2;grid-row:1/3;align-self:center;color:var(--blue)}
.saved-entry,.last-reading {padding:20px 24px;border:1px solid var(--accent-line);border-radius:var(--radius);background:var(--card);font-size:15px;display:flex;flex-direction:column;gap:7px}
.saved-entry span,.last-reading>span {font-size:12px;color:var(--muted)}
.last-reading {background:var(--accent-soft)}
.last-reading strong {font-size:15px;font-weight:550;line-height:1.8}
.last-reading>span:first-child {color:var(--blue)}
.home-article-list .article-card:first-child {background:linear-gradient(135deg,var(--card) 35%,var(--soft));border-color:var(--accent-line);padding:30px 32px}
.home-article-list .article-card:first-child .card-main h3 {font-size:26px;line-height:1.55;margin-top:17px}
.journal-more {display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:64px;margin-top:18px;padding:17px 24px;border:1px dashed var(--accent-line);border-radius:14px;color:var(--blue);font-size:14px}
.journal-more span {font-size:12px;color:var(--muted)}
.journal-more:hover {background:var(--soft);border-style:solid}
.home-skills {padding-block:46px 36px;margin-top:48px;border-top:1px solid var(--line)}
.skills-grid {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.skill-card {background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;min-width:0}
.skill-card:hover {border-color:var(--accent-line);box-shadow:var(--shadow)}
.skill-card-top {display:flex;justify-content:space-between;color:var(--blue)}
.tag {font:12px ui-monospace,monospace;color:var(--blue);padding:3px 9px;background:var(--soft);border-radius:5px}
.skill-card h3 {font-size:22px;margin:19px 0 9px;letter-spacing:-.4px;overflow-wrap:anywhere}
.skill-card p {font-size:15px;color:var(--muted);margin:0 0 22px;line-height:1.8}
.skill-card-link {font-size:14px;color:var(--blue);display:flex;justify-content:space-between;margin-top:auto}
/* Catalogue: persistent classification, immediate results, progressive filtering. */
.archive {padding-block:36px 64px;min-height:70vh}
.back-link {display:inline-flex;align-items:center;min-height:40px;font-size:14px;color:var(--muted)}
.archive-heading {display:flex;align-items:center;justify-content:space-between;gap:25px;padding:12px 0 30px}
.archive-heading h1 {font-size:38px;line-height:1.35;letter-spacing:-1px;margin:10px 0 12px}
.archive-heading p:not(.eyebrow) {margin:0;color:var(--muted);font-size:15px;max-width:760px}
.archive-layout {display:grid;grid-template-columns:215px minmax(0,1fr);gap:32px;align-items:start}
.archive-sidebar {position:sticky;top:calc(var(--header-height) + 24px)}
.catalog-filters {background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.catalog-filters>summary {display:flex;justify-content:space-between;align-items:center;min-height:52px;padding:13px 19px;font-size:14px;font-weight:600;cursor:pointer;list-style:none}
.catalog-filters>summary::-webkit-details-marker {display:none}
.catalog-filter-body {padding:4px 16px 18px;max-height:calc(100vh - var(--header-height) - 200px);overflow:auto;scrollbar-width:thin}
.filter-label {display:block;font-size:12px;color:var(--muted);margin:15px 8px 8px}
.topic-filters,.role-filters {display:flex;flex-direction:column;gap:3px}
.topic-filters a,.role-filters a {display:flex;align-items:center;justify-content:space-between;font-size:14px;min-height:40px;padding:8px 11px;border-radius:7px;color:var(--muted)}
.topic-filters a:hover,.role-filters a:hover {color:var(--blue);background:var(--soft)}
.topic-filters a[aria-current],.role-filters a[aria-current] {color:var(--blue);background:var(--accent-soft);font-weight:600}
.role-filters a span {font:12px ui-monospace,monospace}
.tag-disclosure {margin-top:20px;border-top:1px solid var(--line);padding-top:14px}
.tag-disclosure>summary {font-size:13px;cursor:pointer;color:var(--muted);min-height:34px}
.tag-disclosure>summary span {font:12px ui-monospace,monospace;margin-left:6px}
.tag-disclosure .tag-filters {display:flex;flex-wrap:wrap;gap:6px;padding-top:10px}
.tag-disclosure a {display:inline-flex;align-items:center;gap:7px;padding:4px 7px;border:1px solid var(--line);border-radius:5px;font-size:12px;min-height:30px;color:var(--muted)}
.tag-disclosure a[aria-current],.tag-disclosure a:hover {color:var(--blue);background:var(--accent-soft);border-color:var(--accent-line)}
.tag-disclosure a span {font-size:11px}
.sidebar-map-link {display:flex;flex-direction:column;gap:6px;padding:18px;margin-top:16px;background:var(--accent-soft);border:1px solid var(--accent-line);border-radius:14px;color:var(--blue);font-size:14px}
.sidebar-map-link span {font-size:12px;color:var(--muted)}
.archive-results {min-width:0}
.catalog-tools {display:flex;gap:10px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.catalog-query {flex:1;min-width:90px}
.catalog-query input {width:100%;min-height:44px;border:1px solid var(--line);background:var(--soft);border-radius:8px;font-size:14px;padding:10px 13px}
.catalog-sort-label {min-width:0}
.catalog-tools select {height:44px;font-size:13px;max-width:160px;padding:5px 9px;border:1px solid var(--line);border-radius:8px;background:var(--card)}
.catalog-tools button {font-size:13px;white-space:nowrap;padding-inline:11px}
.saved-filter[aria-pressed=true] {color:var(--blue);background:var(--accent-soft);border-color:var(--accent-line)}
.catalog-reset {color:var(--muted);border-color:transparent}
.catalog-status {display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);min-height:58px;padding-inline:3px}
.archive-search {font-size:13px;color:var(--blue);background:none;border:0}
.archive-list {display:grid;gap:16px}
.archive-list .article-card {padding:24px 28px}
.archive-list .card-main h3 {font-size:22px}
.catalog-empty {padding:40px 20px;text-align:center;border:1px dashed var(--accent-line);border-radius:18px;background:var(--card)}
.catalog-empty h2 {font-size:21px}
.catalog-empty p {font-size:14px;color:var(--muted)}
.catalog-empty a {display:inline-block;font-size:14px;color:var(--blue);margin-left:16px}
/* Reading: restrained chrome, a stable measure and generous line spacing. */
.article-page {overflow-anchor:none;background:var(--card)}
.article-layout {display:grid;grid-template-columns:minmax(0,800px) 220px;justify-content:center;gap:56px;padding-block:32px 64px}
.article-column {min-width:0}
.breadcrumbs {display:flex;align-items:center;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px;margin-bottom:20px}
.breadcrumbs a {display:inline-flex;align-items:center;min-height:32px}
.breadcrumbs a:hover {color:var(--blue)}
.article-header h1 {font-size:36px;line-height:1.5;letter-spacing:-.7px;margin:0 0 22px;text-wrap:pretty;overflow-wrap:anywhere}
.title-sub {display:block;font-size:25px;font-weight:450;line-height:1.6;color:var(--muted);margin-top:10px;letter-spacing:0}
.article-meta {display:flex;flex-wrap:wrap;align-items:center;gap:6px 20px;font-size:13px;color:var(--muted)}
.article-meta a {color:var(--blue)}
.copy-link {font-size:13px;border:0;background:transparent;color:var(--blue);padding:0;min-height:36px}
.header-tags {margin-top:18px}
.source-details {margin-top:17px;color:var(--muted);font-size:12px}
.source-details>summary {cursor:pointer;min-height:32px;display:list-item}
.publication-meta {display:flex;flex-wrap:wrap;gap:9px 20px;font-size:12px;margin:6px 0 16px;overflow-wrap:anywhere}
.publication-meta a {color:var(--blue)}
.reading-toolbar {display:flex;align-items:center;gap:14px;position:sticky;top:var(--header-height);z-index:25;border-block:1px solid var(--line);padding:8px 0;margin:21px 0;background:var(--header);backdrop-filter:blur(16px)}
.reading-toolbar button {font-size:13px;min-height:36px}
.reading-toolbar .bookmark-button {margin-right:auto}
.font-controls {display:flex;align-items:center;gap:4px;color:var(--muted);font-size:12px}
.font-controls>span {margin-right:7px}
.font-controls button {border:0;background:transparent;min-width:36px;padding:4px}
.font-value {min-width:19px;text-align:center;font:12px ui-monospace,monospace}
.focus-toggle {color:var(--muted);border-color:var(--line);background:var(--card)}
.focus-toggle[aria-pressed=true] {color:var(--blue);background:var(--accent-soft);border-color:var(--accent-line)}
.article-series {border:1px solid var(--line);border-radius:12px;margin:20px 0;color:var(--muted);background:var(--bg)}
.article-series>summary {padding:13px 18px;cursor:pointer;font-size:13px;min-height:48px}
.article-series>summary>span {float:right;font-size:12px}
.article-series .series-nav {border:0;margin:0;padding:0 16px 16px;background:transparent}
.series-heading {display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:14px;margin-bottom:12px}
.series-heading h2 {font-size:18px;margin:0}
.series-heading>span {font:12px ui-monospace,monospace;color:var(--muted);white-space:nowrap}
.series-nav ol {display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:0}
.series-nav li {flex:1;min-width:145px}
.series-nav li>a {display:flex;gap:10px;padding:10px;align-items:center;min-height:42px;font-size:13px;border:1px solid transparent;border-radius:7px}
.series-nav li>a:hover {background:var(--soft);color:var(--blue)}
.series-nav li>a[aria-current] {color:var(--blue);border-color:var(--accent-line);background:var(--accent-soft)}
.series-number {font:11px ui-monospace,monospace;color:var(--blue)}
.prose {font-size:var(--prose-size);line-height:1.95;overflow-wrap:break-word}
.prose p {margin:23px 0}
.prose h2 {font-size:1.42em;line-height:1.6;margin:52px 0 22px;letter-spacing:-.4px;padding-top:8px;border-top:1px solid var(--line)}
.prose h3 {font-size:1.17em;line-height:1.6;margin:34px 0 16px}
.prose h4 {font-size:1em;margin-top:26px}
.prose :is(h2,h3,h4) {scroll-margin-top:75px;position:relative}
.prose :is(h2,h3):target {color:var(--blue)}
.prose .heading-anchor {font-size:.65em;display:inline-flex;margin-left:10px;vertical-align:middle;text-decoration:none;opacity:0;color:var(--blue);min-width:28px;justify-content:center}
.prose :is(h2,h3):hover .heading-anchor,.heading-anchor:focus-visible {opacity:1}
.prose a {color:var(--blue);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--blue) 35%,transparent);text-underline-offset:4px}
.prose strong {font-weight:650}
.prose li {margin:8px 0}
.prose :is(ul,ol) {padding-left:1.6em}
.prose blockquote {padding:2px 22px;border-left:3px solid var(--blue);border-radius:0 10px 10px 0;background:var(--soft);margin:27px 0;font-size:.93em;color:var(--muted)}
.prose blockquote p {margin:15px 0}
.prose code {font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.84em;background:var(--soft);color:var(--blue);padding:2px 5px;border-radius:4px;overflow-wrap:anywhere}
.prose pre {background:var(--code);color:#dce6fb;padding:44px 20px 22px;border-radius:12px;overflow:auto;position:relative;line-height:1.8;margin:26px 0;overscroll-behavior-inline:contain}
.prose pre code,.prose pre code.hljs {background:transparent;color:#dce6fb;padding:0;font-size:13px;overflow-wrap:normal}
.prose pre.numbered-code {--code-row:24px;--code-pad:44px;padding:var(--code-pad) 20px 22px 62px;line-height:var(--code-row)}
.prose pre.numbered-code code {display:block;font-size:13px;line-height:var(--code-row);white-space:pre}
.copy-code {position:absolute;right:9px;top:7px;border:0;background:transparent;color:#bdd0ec;font-size:12px;min-height:31px;padding:4px 9px}
.copy-code:hover {background:#253b55}
.code-gutter {position:absolute;left:0;top:var(--code-pad);width:48px;text-align:right;padding-right:12px;user-select:none}
.code-gutter a {display:block;height:var(--code-row);font:12px/var(--code-row) monospace;color:#91a5c0;border:0;text-decoration:none}
.code-gutter a:hover,.code-gutter a[aria-current] {color:#c2e7ff}
.numbered-code[style*="--selected-line"] {background-image:linear-gradient(#76b7ed29,#76b7ed29);background-repeat:no-repeat;background-size:100% var(--code-row);background-position:0 calc(var(--code-pad) + var(--selected-line)*var(--code-row))}
.table-scroll {overflow-x:auto;overscroll-behavior-x:contain;border:1px solid var(--line);border-radius:10px;margin:27px 0}
.prose table {border-collapse:collapse;width:100%;min-width:500px;font-size:14px;line-height:1.8}
@media (max-width:640px) {
  .prose table:not(:has(tr > :nth-child(4))) {min-width:0;table-layout:fixed}
  .prose table:not(:has(tr > :nth-child(4))) :is(th,td) {overflow-wrap:anywhere}
}
.prose th,.prose td {text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}
.prose th {background:var(--soft);font-weight:600}
.prose tr:last-child td {border-bottom:0}
.prose img {max-width:100%;height:auto;border-radius:10px}
.prose hr {border:0;border-top:1px solid var(--line);margin:38px 0}
.math-block {overflow-x:auto;padding:14px 4px;white-space:pre-wrap;font-family:ui-monospace,monospace}
.math-block .katex-display {margin:.5em 0}
.toc-panel {position:sticky;top:calc(var(--header-height) + 32px);align-self:start;max-height:calc(100vh - var(--header-height) - 60px);overflow:auto;scrollbar-width:thin;padding-left:8px}
.toc-label {font-size:13px;font-weight:650;letter-spacing:.04em}
.toc ul {list-style:none;padding:0;margin:18px 0}
.toc ul ul {margin:0 0 0 10px}
.toc a {display:block;font-size:12px;line-height:1.8;color:var(--muted);padding:8px 0 8px 12px;border-left:2px solid var(--line)}
.toc a:hover,.toc a.current {color:var(--blue);border-color:var(--blue)}
.toc a.current {background:linear-gradient(90deg,var(--soft),transparent)}
.back-top {display:block;font-size:13px;color:var(--blue);margin:18px 0;min-height:36px}
.mobile-toc {display:none}
.reading-progress {height:3px;position:fixed;left:0;top:calc(var(--header-height) - 2px);width:0;background:var(--blue);z-index:45}
.resume-reading {display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:12px 15px;background:var(--accent-soft);border-radius:10px;margin:18px 0;font-size:12px;color:var(--muted)}
.resume-reading button {color:var(--blue);font-size:13px;border:0;background:transparent;padding:4px 7px;min-height:36px}
.diagram {position:relative;background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:48px 18px 20px;margin:28px 0;overflow:auto}
.prose .mermaid {background:transparent;color:var(--text);padding:0;margin:0;text-align:center;font-size:13px}
.mermaid svg {max-width:100%;height:auto;display:block;margin:auto}
.expand-diagram {position:absolute;right:8px;top:8px;min-height:32px;padding:3px 10px;font-size:12px;background:var(--card);color:var(--blue)}
.diagram-error {font-size:14px;color:var(--muted)}
.reading-actions {display:flex;align-items:center;gap:16px;border-top:1px solid var(--line);padding-top:24px;margin-top:46px}
.reading-actions .mascot {width:64px;height:64px}
.reading-actions>.text-link {margin-left:auto}
.reading-complete {color:var(--blue);background:var(--accent-soft);border-color:var(--accent-line);font-size:14px}
.series-pager {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:27px}
.series-page-link {padding:23px;border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;gap:7px;background:var(--bg)}
.series-page-link:hover {background:var(--soft);border-color:var(--accent-line)}
.series-page-link.next:only-child {grid-column:2}
.pager-label {font-size:12px;color:var(--blue)}
.series-page-link strong {font-size:17px;font-weight:600}
.pager-title {font-size:13px;color:var(--muted);line-height:1.8}
.reading-shortcuts {font-size:12px;color:var(--muted)}
.related-articles {margin-top:40px}
.related-articles h2 {font-size:20px}
.related-articles>div {display:grid;gap:10px}
.related-articles a {display:flex;flex-direction:column;gap:6px;padding:17px 20px;border:1px solid var(--line);border-radius:10px}
.related-articles a:hover {background:var(--soft);border-color:var(--accent-line)}
.related-articles span {font-size:12px;color:var(--muted)}
.related-articles strong {font-size:15px;font-weight:550}
.article-end {display:flex;justify-content:space-between;align-items:center;gap:20px;border-top:1px solid var(--line);padding-top:27px;margin-top:35px}
.article-end p {font-size:15px;margin:7px 0;color:var(--muted)}
.focus-reading .article-layout {grid-template-columns:minmax(0,800px)}
.focus-reading :is(.toc-panel,.article-series,.header-tags,.source-details) {display:none}
/* Atlas and reusable skills retain a shared visual vocabulary. */
.reading-map {border:1px solid var(--line);border-radius:var(--radius);background:var(--card);padding:28px;margin-bottom:25px;scroll-margin-top:100px}
.map-heading {display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:25px}
.map-heading h2 {font-size:24px;margin:7px 0;letter-spacing:-.5px}
.map-heading p:last-child,.map-note {font-size:13px;color:var(--muted);margin:0}
.map-steps {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;list-style:none;padding:0;margin:0}
.map-step {min-width:0}
.map-step a {display:flex;flex-direction:column;height:100%;padding:20px 17px;border:1px solid var(--line);border-top:3px solid var(--accent-line);border-radius:10px;background:var(--bg)}
.map-step a:hover {background:var(--soft);border-color:var(--accent-line)}
.map-number {font:13px ui-monospace,monospace;color:var(--blue)}
.map-step h3 {font-size:17px;line-height:1.6;margin:14px 0 8px}
.map-step p {font-size:13px;color:var(--muted);line-height:1.8;margin:0 0 22px}
.map-meta {margin-top:auto;display:flex;gap:10px;justify-content:space-between;font-size:12px;color:var(--muted)}
.map-step.is-read a {border-top-color:var(--blue)}
.map-step.is-read [data-reading-status] {color:var(--blue)}
.map-footer {display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:12px;color:var(--muted);margin-top:15px}
.map-progress {height:4px;background:var(--line);border-radius:9px;overflow:hidden;margin-top:23px}
.map-progress-fill {height:100%;background:var(--blue);transform:scaleX(0);transform-origin:left}
.skill-header>.eyebrow {margin-bottom:12px}
.skill-page .prose>p:first-child {font-size:21px;color:var(--text)}
/* Dialogs and utility illustrations. */
dialog {width:min(710px,calc(100% - 32px));max-height:88dvh;padding:24px;border:1px solid var(--line);border-radius:20px;color:var(--text);background:var(--card);box-shadow:0 32px 100px #0004;overscroll-behavior:contain}
dialog::backdrop {background:#0e203477;backdrop-filter:blur(6px)}
body:has(dialog[open]) {overflow:hidden}
.dialog-top {display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}
.dialog-top h2 {font-size:19px;margin:0;display:flex;align-items:center;gap:10px}
.dialog-top .mascot {width:45px;height:45px}
#search-input {width:100%;min-height:52px;border:1px solid var(--accent-line);background:var(--soft);padding:12px 16px;border-radius:10px;font-size:16px}
.search-suggestions {display:flex;gap:6px;flex-wrap:wrap;margin:12px 0}
.search-suggestions button {font-size:12px;min-height:30px;padding:3px 9px;color:var(--muted);border-color:var(--line);background:var(--card)}
#search-results {overflow:auto;max-height:48dvh;min-height:55px;scrollbar-width:thin}
.search-count {font-size:12px;color:var(--muted);margin:12px 8px}
.search-result {display:block;padding:18px 12px;border-bottom:1px solid var(--line);border-radius:8px}
.search-result:hover,.search-result:focus {background:var(--soft);outline-offset:-3px}
.search-result strong {font-size:15px;line-height:1.7;font-weight:600;display:block}
.result-heading {display:block;font-size:12px;color:var(--blue);margin:6px 0}
.result-excerpt {display:block;font-size:13px;line-height:1.8;color:var(--muted)}
.search-empty {text-align:center;padding:20px;font-size:14px;color:var(--muted)}
mark {background:#cfe2ff;color:#194278;border-radius:3px;padding:0 2px}
:root[data-theme=dark] mark {background:#304c70;color:#e2efff}
.dialog-hint {font-size:12px;color:var(--muted);margin:16px 0 0}
#diagram-dialog {width:min(1200px,calc(100% - 24px))}
.diagram-controls {display:flex;gap:4px;align-items:center}
.zoom-reset {font-size:12px;min-height:38px;padding:5px 10px}
#diagram-view {overflow:auto;max-height:68dvh;min-height:150px;border-radius:10px;padding:20px;background:var(--soft);overscroll-behavior:contain}
#diagram-view svg,#diagram-view img {max-width:none!important;height:auto!important;display:block;margin:auto}
.prose .image-zoom {display:inline-block;max-width:100%;cursor:zoom-in}
.prose .image-zoom:focus-visible {outline:2px solid var(--blue);outline-offset:4px;border-radius:10px}
#menu-dialog {max-width:440px}
#menu-dialog nav {display:grid;grid-template-columns:1fr 1fr;gap:10px}
#menu-dialog nav a {padding:15px;background:var(--soft);border-radius:9px;font-size:15px;min-height:50px}
#menu-dialog nav a:hover {color:var(--blue);background:var(--accent-soft)}
.toast {position:fixed;left:50%;bottom:25px;transform:translate(-50%,12px);background:var(--text);color:var(--bg);padding:12px 20px;border-radius:12px;font-size:14px;max-width:90vw;z-index:90;opacity:0;pointer-events:none;box-shadow:var(--shadow)}
.toast.show {opacity:1;transform:translate(-50%,0)}
.mascot {display:inline-block;width:96px;height:96px;background-image:url('whale-states.webp');background-size:200% 200%;background-repeat:no-repeat;flex-shrink:0}
.mascot-reading {background-position:0 0}.mascot-search {background-position:100% 0}.mascot-complete {background-position:0 100%}.mascot-lost {background-position:100% 100%}
.credits {max-width:800px;padding-block:36px 64px;min-height:65vh}
.credits h1,.error-page h1 {font-size:34px;line-height:1.5}
.credits h2 {font-size:23px;margin-top:32px}
.credits p {font-size:16px;line-height:1.95;color:var(--muted)}
.credits a:not(.back-link) {color:var(--blue);text-decoration:underline;text-underline-offset:4px}
.credits-note {border-top:1px solid var(--line);padding-top:20px;margin-top:28px}
.error-page {padding-block:70px;min-height:65vh;text-align:center}
.error-page>.mascot {display:block;margin:auto}
.error-page p {color:var(--muted);margin-bottom:24px}
/* Motion never gates content visibility. */
a,button,.article-card,.skill-card {transition:background-color .18s,border-color .18s,color .18s,box-shadow .18s,transform .18s}
.toast {transition:opacity .2s,transform .2s}
@keyframes dialog-arrive {from{transform:translateY(8px)}to{transform:translateY(0)}}
@media(prefers-reduced-motion:no-preference) {dialog[open]{animation:dialog-arrive .18s ease-out}.map-progress-fill{transition:transform .3s ease-out}}
@media(hover:hover) {.home-entry>a:hover strong{color:var(--blue)}.skill-card:hover{transform:translateY(-2px)}}
/* Blue-white editorial refinement: illustration leads, typography carries the journal. */
.header {border-bottom-color:color-mix(in srgb,var(--line) 65%,transparent)}
.brand-icon {box-shadow:inset 0 1px 0 #fff6}
.hero {margin-top:36px;border-radius:24px;box-shadow:0 16px 48px #235fd30a}
.hero-copy {padding:50px 0 44px 48px}
.hero h1 {font-weight:720;letter-spacing:-1.8px;line-height:1.27}
.hero .eyebrow {font-size:11px;letter-spacing:.18em}
.hero-description {line-height:2}
.hero-stats {border-top:1px solid var(--line);padding-top:20px;width:fit-content}
.hero-caption {border:1px solid #ffffff80;backdrop-filter:blur(8px);border-radius:20px;padding:6px 12px}
.home-entry {gap:0;border-block:1px solid var(--line);margin-top:28px;padding-block:8px}
.home-entry>a {background:transparent;border:0;border-radius:8px;padding:20px 26px}
.home-entry>a+a {border-left:1px solid var(--line)}
.home-entry>a:after {top:23px;right:24px;color:var(--blue);font-size:17px}
.home-entry>a:hover {transform:none;background:var(--soft)}
.home-entry strong {font-size:16px}
.home-entry>a>span:first-child {font-size:10px;letter-spacing:.13em;margin-bottom:4px}
.home-columns {gap:48px;margin-top:56px;grid-template-columns:minmax(0,1fr) 288px}
.section-heading {padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:10px}
.section-heading h2 {font-size:26px;font-weight:650}
.section-heading .eyebrow {font-size:10px;letter-spacing:.16em}
.home-article-list {gap:0}
.home-article-list .article-card {padding:27px 4px 28px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent}
.home-article-list .article-card:hover,.home-article-list .article-card:focus-within {box-shadow:none}
.home-article-list .article-card:hover .card-main h3 {color:var(--blue)}
.home-article-list .article-card:first-child {margin-top:16px;margin-bottom:8px;padding:28px 30px;border:1px solid var(--accent-line);border-radius:18px;background:linear-gradient(125deg,var(--card),var(--accent-soft));box-shadow:0 8px 30px #235fd306}
.home-article-list .card-main h3 {font-size:22px;line-height:1.6;margin:10px 0 12px;font-weight:650}
.home-article-list .article-card:first-child .card-main h3 {font-size:26px;line-height:1.5}
.home-article-list .card-main p {-webkit-line-clamp:2;line-height:1.95}
.home-article-list .card-bottom {border-top:0;padding-top:0;margin-top:16px}
.card-category {font-size:12px;letter-spacing:.02em}
.content-tag {border-radius:6px;background:color-mix(in srgb,var(--soft) 65%,var(--card));color:var(--muted)}
.home-sidebar {margin-top:88px;gap:24px}
.sidebar-panel {padding:24px;border-color:var(--line);box-shadow:0 4px 20px #235fd303}
.sidebar-panel .eyebrow {font-size:10px;letter-spacing:.14em}
.sidebar-panel h2 {font-size:18px;margin-top:8px}
.topic-tiles a {min-height:48px;font-size:13px}
.journal-more {border-style:solid;border-radius:10px;background:var(--card);margin-top:24px}
.home-skills {margin-top:56px}
.home-skills .section-heading {border:0}
.article-header h1 {letter-spacing:-.8px;line-height:1.5;text-wrap:pretty}
.prose {line-height:2}
.prose h2 {padding-top:24px;margin-top:56px}
.prose blockquote {border-radius:0 10px 10px 0}
.toc-panel {border-left:1px solid var(--line);padding-left:20px}
.footer {margin-top:40px;padding-block:36px}
@media(min-width:1101px) {.article-layout{grid-template-columns:minmax(0,760px) 220px;gap:64px;padding-top:44px}}

/* Tablet and phone use the same content order without horizontal page overflow. */
@media(max-width:1100px) {
  .wrap{width:calc(100% - 48px)}.header-inner{width:calc(100% - 40px)}.header nav>a{padding-inline:9px}.header .nav-github{display:none}
  .home-columns{grid-template-columns:minmax(0,1fr) 275px;gap:24px}.sidebar-panel{padding:22px}.hero-copy{width:60%;padding-left:32px}
  .article-layout{grid-template-columns:minmax(0,1fr) 185px;gap:30px}.article-header h1{font-size:32px}.title-sub{font-size:23px}
  .archive-layout{grid-template-columns:190px minmax(0,1fr);gap:22px}.catalog-tools{flex-wrap:wrap}.catalog-query{flex-basis:100%}.catalog-sort-label{margin-right:auto}
  .map-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:800px) {
  :root{--header-height:68px}.header-inner{width:calc(100% - 28px);gap:10px}.brand{font-size:20px;gap:9px}.brand-icon{width:32px;height:34px;font-size:21px}.brand-caption{font-size:10px}
  .header nav{gap:3px}.header nav>a{display:none}.header .search-trigger{min-width:44px;width:44px;padding:0;justify-content:center;margin:0;background:transparent;border:0}.search-trigger>span,.search-trigger kbd{display:none}.menu-toggle{display:inline-flex;align-items:center;justify-content:center;font-size:13px;min-width:44px;padding:5px 8px;border:0;background:transparent}
  .header:not(:has(.menu-toggle:not([hidden]))) nav>a{display:inline-flex;font-size:12px;padding-inline:5px}.header:not(:has(.menu-toggle:not([hidden]))) .brand-caption{display:none}
  .home-columns{grid-template-columns:1fr}.home-sidebar{grid-template-columns:1fr 1fr;margin-top:0}.last-reading,.saved-entry{grid-column:1/-1}.hero{min-height:430px}.hero-copy{width:65%;padding:34px 0 29px 29px}.hero h1{font-size:42px}
  .home-entry{gap:0}.home-entry>a{padding:18px}.home-entry>a:after{display:none}.home-entry strong{font-size:15px}.home-entry>a>span:last-child{font-size:12px}.home-entry>a>span:first-child{font-size:10px}
  .article-layout{display:block;max-width:820px}.toc-panel{display:none}.mobile-toc{display:block;border:1px solid var(--line);border-radius:10px;margin:20px 0;background:var(--bg)}.mobile-toc>summary{cursor:pointer;min-height:46px;padding:10px 16px;font-size:14px;display:flex;justify-content:space-between;align-items:center}.mobile-toc .toc{padding:0 16px 12px}.mobile-toc .toc a{font-size:14px;min-height:40px}
  .archive-layout{display:block}.archive-sidebar{position:static;margin-bottom:20px}.catalog-filters>summary{min-height:48px}.catalog-filter-body{max-height:320px}.topic-filters,.role-filters{flex-direction:row;flex-wrap:wrap}.role-filters a{gap:12px}.filter-label{margin-top:12px}.sidebar-map-link{display:none}
  .catalog-tools{flex-wrap:nowrap}.catalog-query{flex-basis:auto}.catalog-sort-label{margin-right:0}.archive-heading h1{font-size:32px}.archive-heading p:not(.eyebrow){font-size:14px}
  .footer{align-items:flex-start}.footer>div{max-width:500px}
}
@media(max-width:560px) {
  .wrap{width:calc(100% - 32px)}.brand-caption{display:none}.brand{font-size:19px}.brand-icon{width:30px;height:32px;font-size:20px}.header nav{gap:0}
  .hero{margin-top:16px;border-radius:18px;min-height:0;display:flex;flex-direction:column}.hero-copy{width:100%;padding:26px 24px 18px}.hero h1{font-size:39px;margin:16px 0}.hero-description{font-size:14px;line-height:1.8}.hero-actions{margin-top:20px;gap:17px}.hero-actions .text-link{font-size:13px}.button-primary{padding:10px 16px;gap:16px}.hero-stats{margin-top:20px;gap:12px;padding-top:16px;flex-wrap:wrap}.hero-stats a{padding-left:12px;font-size:12px}.hero-stats strong{font-size:16px}.hero-art{position:relative;height:248px;flex-shrink:0}.hero-art img{object-position:78% top}.hero-art:after{background:linear-gradient(180deg,var(--card),transparent 12%)}:root[data-theme=dark] .hero-art:after{background:linear-gradient(180deg,var(--card),transparent 12%)}.hero-caption{display:none}
  .home-entry{grid-template-columns:1fr;margin-top:16px;gap:9px}.home-entry>a{padding:14px 18px;display:grid;grid-template-columns:80px 1fr;gap:2px 12px}.home-entry>a>span:first-child{grid-row:1/3;align-self:center}.home-entry>a>span:last-child{grid-column:2}.home-entry>a{border-radius:8px}.home-entry>a+a{border-left:0;border-top:1px solid var(--line)}
  .home-columns{margin-top:30px;gap:25px}.section-heading{margin-bottom:17px}.section-heading h2{font-size:25px}.section-heading .text-link{font-size:13px}.home-sidebar{grid-template-columns:1fr}.home-skills{padding-top:32px;margin-top:32px}.skills-grid{grid-template-columns:1fr;gap:15px}.skill-card{padding:23px}.skill-card h3{font-size:21px}
  .article-card,.archive-list .article-card,.home-article-list .article-card:first-child{padding:19px 20px;border-radius:14px}.home-article-list .article-card:not(:first-child){padding:22px 2px;border-radius:0}.card-main h3,.archive-list .card-main h3,.home-article-list .article-card:first-child .card-main h3{font-size:19px;line-height:1.7}.card-main p{font-size:14px}.card-meta{font-size:11px;gap:6px}.card-meta .bookmark-button{padding-inline:5px;min-height:40px}.card-meta .bookmark-button span{display:none}.card-meta .bookmark-button svg{width:18px}.card-category{flex:1}.card-bottom{gap:8px 13px;font-size:11px}.card-bottom>a{font-size:12px}.card-bottom time{flex-basis:auto}.article-tags{gap:6px}.content-tag{font-size:11px;min-height:30px}
  .archive{padding-top:20px}.archive-heading{padding:8px 0 21px;align-items:flex-start;gap:10px}.archive-heading h1{font-size:29px}.archive-heading>.text-link{font-size:12px;white-space:nowrap}.archive-heading p:not(.eyebrow){line-height:1.8}.catalog-tools{padding:12px;gap:8px;flex-wrap:wrap}.catalog-query{flex-basis:100%}.catalog-sort-label{margin-right:auto}.catalog-tools select{max-width:150px}.catalog-tools button{padding-inline:10px}.catalog-empty{padding-inline:14px}.catalog-empty h2{font-size:19px}
  .article-layout{padding-top:22px}.article-header h1{font-size:28px;line-height:1.55}.title-sub{font-size:21px;line-height:1.65}.article-meta{font-size:12px;gap:5px 13px}.article-meta a{min-height:32px}.reading-toolbar{gap:6px}.reading-toolbar .bookmark-button{padding-inline:5px;font-size:12px}.reading-toolbar .bookmark-button svg{width:16px}.reading-toolbar .focus-toggle{font-size:12px;padding-inline:9px}.font-controls>span{display:none}.font-controls button{min-width:32px}.font-controls{gap:0}.prose{font-size:var(--prose-size)}.prose .keep{white-space:normal}.prose h2{font-size:1.25em;margin-top:38px}.prose h3{font-size:1.1em}.prose .heading-anchor{opacity:.65}.prose blockquote{padding-inline:16px}.prose pre.numbered-code{padding-right:16px}.prose :is(ul,ol){padding-left:1.25em}.article-series>summary{padding:12px 13px}.article-series>summary>span{display:none}.series-nav li{flex-basis:100%}.diagram{padding:47px 8px 15px}.reading-actions{flex-wrap:wrap;gap:12px}.reading-actions .mascot{width:50px;height:50px}.reading-actions>.text-link{font-size:13px}.series-pager{grid-template-columns:1fr}.series-page-link.next:only-child{grid-column:auto}.reading-shortcuts{display:none}.article-end{flex-direction:column;align-items:flex-start;gap:8px}.related-articles strong{font-size:14px}
  .reading-map{padding:20px 18px}.map-heading{flex-direction:column;align-items:flex-start;gap:6px;margin-bottom:18px}.map-heading h2{font-size:22px}.map-steps{grid-template-columns:1fr;gap:10px}.map-step a{padding:16px}.map-step h3{margin-top:8px}.map-step p{margin-bottom:15px}.map-footer{font-size:11px}
  .footer{flex-direction:column;gap:18px;padding-block:26px}.footer>div{justify-content:flex-start;gap:9px 17px}.footer>div>span{text-align:left}.footer-brand{font-size:17px;flex-direction:row;gap:14px;align-items:center}
  dialog{padding:18px;border-radius:15px;width:calc(100% - 20px)}.dialog-top{gap:8px}.dialog-top h2{font-size:17px}.dialog-top .mascot{width:36px;height:36px}.dialog-hint{font-size:11px}#search-results{max-height:47dvh}.search-result{padding:15px 7px}#diagram-dialog{padding:12px}.diagram-controls{gap:0}.diagram-controls .icon-button{width:35px;min-width:35px}.zoom-reset{font-size:11px;padding-inline:6px}#diagram-view{padding:10px}.credits h1,.error-page h1{font-size:29px}
}
@media(prefers-reduced-motion:reduce) {html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print {
  body{color:#111;background:#fff}.wrap{width:100%;max-width:none}.article-layout{display:block;padding:0}.prose{font-size:11pt}
  .header,.footer,.toc-panel,.mobile-toc,.reading-toolbar,.reading-progress,.copy-code,.code-gutter,.expand-diagram,.article-series,.series-pager,.reading-actions,.related-articles,.article-end,.resume-reading,.reading-shortcuts,.bookmark-button,dialog,.toast{display:none!important}
  .prose pre.numbered-code{padding-left:16px}.prose pre,.diagram,.table-scroll{break-inside:avoid}.hero,.article-card,.skill-card{box-shadow:none}
}

/* Optional implementation depth stays visible as a reading choice. */
.prose details {margin:24px 0;border:1px solid var(--line);border-radius:10px;padding:0 18px;background:var(--card)}
.prose details>summary {padding:14px 0;cursor:pointer;font-weight:600;line-height:1.65;overflow-wrap:anywhere}
.prose details[open]>summary {border-bottom:1px solid var(--line);margin-bottom:18px}
.prose details>:last-child {margin-bottom:18px}

/* Discovery, technical reading and local rendering share the same palette. */
.problem-entries {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:20px}
.problem-entries>a {position:relative;display:flex;flex-direction:column;gap:8px;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
.problem-entries>a:hover {border-color:var(--accent-line);background:var(--soft)}
.problem-entries>a>span:first-child {font:12px ui-monospace,monospace;color:var(--blue)}
.problem-entries strong {font-size:16px;line-height:1.6;padding-right:8px}
.problem-entries>a>span:last-of-type {font-size:13px;color:var(--muted);line-height:1.8}
.problem-entries b {position:absolute;right:18px;top:17px;color:var(--blue);font-weight:400}
.featured-section {margin-top:44px}
.featured-grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.featured-grid .article-card {padding:24px;box-shadow:none}
.featured-grid .card-main h3 {font-size:19px;line-height:1.65}
.featured-grid .card-meta {align-items:flex-start;flex-wrap:wrap}
.featured-grid .card-main p {-webkit-line-clamp:3}
.featured-grid .article-tags {display:none}
.featured-grid .card-bottom {margin-top:16px;gap:8px}
.featured-grid .card-bottom time {display:none}
.guide-jumps {display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.guide-jumps a {padding:9px 14px;border:1px solid var(--line);border-radius:8px;background:var(--card);font-size:14px}
.guide-jumps a:hover {border-color:var(--accent-line);color:var(--blue)}
.problem-guide {display:grid;grid-template-columns:260px minmax(0,1fr);gap:40px;padding:36px 0;border-top:1px solid var(--line);scroll-margin-top:calc(var(--header-height) + 24px)}
.guide-intro h2 {font-size:25px;line-height:1.5;margin:0 0 14px}
.guide-intro p {font-size:15px;color:var(--muted);line-height:1.85}
.guide-intro>span,.guide-meta {font-size:12px;color:var(--muted)}
.problem-guide ol {list-style:none;padding:0;margin:0;display:grid;gap:12px}
.problem-guide li>a {display:grid;grid-template-columns:30px minmax(0,1fr) 18px;gap:16px;padding:21px 24px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.problem-guide li>a:hover {border-color:var(--accent-line)}
.guide-number {color:var(--blue);font:14px/2 ui-monospace,monospace}
.problem-guide h3 {font-size:17px;line-height:1.7;margin:0 0 7px;overflow-wrap:anywhere}
.problem-guide li p {font-size:14px;line-height:1.85;color:var(--muted);margin:0 0 9px}
.source-status {font-size:12px;color:var(--muted);margin-top:15px;line-height:1.8}
.source-status>span {margin:0 5px}
.table-wrap {min-width:0;margin:27px 0}
.table-wrap .table-scroll {margin:0}
.prose .table-hint {font-size:12px;color:var(--muted);margin:0 0 8px}
.toc-fab {display:none}
#toc-dialog {max-width:620px;max-height:80dvh}
#toc-dialog .toc {overflow:auto;max-height:60dvh;overscroll-behavior:contain}
#toc-dialog .toc ul {padding-left:20px;list-style:none}
#toc-dialog .toc>ul {padding-left:0}
#toc-dialog .toc a {display:block;padding:8px 4px;font-size:14px;line-height:1.7;color:var(--muted)}
#toc-dialog .toc a.current {color:var(--blue);font-weight:600}
.search-more {display:block;width:100%;margin:12px 0 4px;background:var(--soft);color:var(--blue)}
.prose .hljs-keyword,.prose .hljs-selector-tag,.prose .hljs-literal {color:#ff9d9d}
.prose .hljs-string,.prose .hljs-regexp,.prose .hljs-addition {color:#a7d8ff}
.prose .hljs-number,.prose .hljs-attr,.prose .hljs-built_in {color:#b8caff}
.prose .hljs-title,.prose .hljs-function .hljs-title {color:#dfc0ff}
.prose .hljs-comment,.prose .hljs-quote {color:#96abc4}
.prose .hljs-meta,.prose .hljs-deletion {color:#f6bb8a}
.math-rendered {overflow-x:auto;overscroll-behavior-inline:contain}
.math-rendered .katex-display {margin:0;padding:10px 0}
.math-rendered .katex {font-size:1.08em}
.math-rendered .katex-html {white-space:nowrap}
@media(max-width:1100px) {
  .problem-entries {grid-template-columns:repeat(2,minmax(0,1fr))}
  .featured-grid .article-card {padding:20px}
  .featured-grid .card-main h3 {font-size:18px}
}
@media(max-width:800px) {
  .featured-grid {grid-template-columns:1fr}
  .featured-grid .article-card {padding:22px 24px}
  .featured-grid .card-main p {-webkit-line-clamp:2}
  .problem-guide {grid-template-columns:1fr;gap:16px}
  .guide-intro p {margin:8px 0}
  .toc-fab {display:block;position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:25;background:var(--card);color:var(--blue);border:1px solid var(--accent-line);box-shadow:0 4px 22px #102a4926;font-size:13px;padding:9px 15px}
  body:has(.toc-fab) .footer {padding-bottom:85px}
  .focus-reading .toc-fab {display:block}
}
@media(max-width:560px) {
  .problem-entries {gap:8px;margin-top:12px}
  .problem-entries>a {padding:14px 13px;gap:6px;border-radius:10px}
  .problem-entries strong {font-size:14px;padding-right:0}
  .problem-entries>a>span:last-of-type {display:none}
  .problem-entries b {right:12px;top:10px;font-size:13px}
  .featured-section {margin-top:28px}
  .featured-grid {gap:10px}
  .featured-grid .article-card {padding:17px 19px;border-radius:12px}
  .featured-grid .card-main h3 {font-size:17px;margin:8px 0}
  .featured-grid .card-main p {font-size:13px;line-height:1.8}
  .featured-grid .card-bottom {padding-top:10px;margin-top:12px}
  .guide-jumps {gap:8px}
  .guide-jumps a {font-size:12px;padding:8px 10px}
  .problem-guide {padding:25px 0}
  .guide-intro h2 {font-size:22px}
  .problem-guide li>a {padding:16px 14px;grid-template-columns:23px minmax(0,1fr) 12px;gap:10px}
  .problem-guide h3 {font-size:16px}
  .problem-guide li p {font-size:13px}
  #search-dialog {max-height:calc(100dvh - 20px);margin:10px auto}
  #search-results {max-height:min(52dvh,calc(100dvh - 230px));overscroll-behavior:contain}
}
@media print {.toc-fab,.table-hint {display:none!important}}


/* Owner-selected standing illustration and a separate, controllable chibi vignette. */
.hero-user-art {background:var(--card);min-height:440px}
.hero-user-art .hero-copy {width:55%}
.hero-user-art .hero-copy {padding-top:32px;padding-bottom:28px}
.hero-user-art h1 {margin-block:16px}
.hero-user-art .hero-actions {margin-top:20px}
.hero-user-art .hero-stats {margin-top:20px}
.hero-user-art .hero-art {inset:0 0 0 auto;width:43%;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at center,#fff 25%,var(--soft) 95%);border-left:1px solid var(--line)}
.hero-user-art .hero-art img {width:236px;height:420px;max-width:100%;object-fit:contain;object-position:center;filter:none;mix-blend-mode:multiply}
.hero-user-art .hero-art:after {display:none}
:root[data-theme=dark] .hero-user-art .hero-art {background:linear-gradient(145deg,#9fb3ce,#d7e2f0)}
:root[data-theme=dark] .hero-user-art .hero-art img {filter:none;mix-blend-mode:multiply}
.hero-user-art .hero-caption {color:#52677d;background:#fdfdfde8;border-color:#dfe8f3;bottom:12px;right:18px;font-size:9px}
.whale-companion {overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
.companion-heading {display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 14px;font-size:12px;color:var(--muted)}
.whale-motion-toggle {font-size:11px;min-height:32px;padding:3px 8px;border-radius:7px;background:var(--soft);white-space:nowrap}
.whale-loop {display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:contain;background:#4d60f5}
.companion-credit {display:block;padding:7px 14px;font-size:10px;color:var(--muted);text-align:right}
.companion-credit:hover {color:var(--blue)}
@media(max-width:1100px) {.hero-user-art .hero-copy{width:57%}.hero-user-art .hero-art{width:40%}}
@media(max-width:800px) {.hero-user-art{min-height:440px}.hero-user-art .hero-copy{width:57%;padding-left:28px}.hero-user-art .hero-art{width:40%}.hero-user-art .hero-art img{width:225px;height:400px}.whale-companion{align-self:start}}
@media(max-width:560px) {.hero-user-art{min-height:0;display:grid;grid-template-columns:minmax(0,1fr) 100px;align-items:stretch}.hero-user-art .hero-copy{width:auto;padding:22px 0 22px 19px;min-width:0}.hero-user-art h1{font-size:clamp(27px,7.3vw,36px);line-height:1.3;margin:12px 0}.hero-user-art .hero-description{font-size:12px;line-height:1.85}.hero-user-art .eyebrow{font-size:9px;letter-spacing:.03em}.hero-user-art .hero-actions{gap:5px;margin-top:15px;align-items:flex-start;flex-direction:column}.hero-user-art .button-primary{min-height:42px;padding:8px 12px;font-size:12px;gap:10px}.hero-user-art .hero-actions .text-link{font-size:12px;min-height:32px}.hero-user-art .hero-stats{gap:5px 12px;margin-top:10px;padding-top:10px;font-size:10px}.hero-user-art .hero-stats strong{font-size:14px}.hero-user-art .hero-stats a{display:none}.hero-user-art .hero-art{position:relative;inset:auto;width:100%;height:auto;min-height:260px;border-left:0;border-top:0;background:transparent}.hero-user-art .hero-art img{width:100px;height:auto;max-height:300px;object-fit:contain}.hero-user-art .hero-caption{display:none}:root[data-theme=dark] .hero-user-art .hero-art{background:linear-gradient(145deg,#9fb3ce,#d7e2f0)}}