:root {
  --color-bg: #f7faff;
  --color-surface: #ffffff;
  --color-surface-raised: #ffffff;
  --color-text: #10213a;
  --color-muted: #5f7088;
  --color-primary: #0c63ce;
  --color-primary-hover: #084d9f;
  --color-secondary: #6558d6;
  --color-border: #cbd8e8;
  --color-focus: #0c63ce;
  --color-success: #197048;
  --color-warning: #825500;
  --color-danger: #b42332;
  --color-danger-surface: #fff1f2;
  --shadow-card: 0 1rem 2.5rem rgb(16 33 58 / 9%);
  --font-display: ui-rounded, "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-body: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-utility: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --radius-sm: 0.5rem;
  --radius-md: 0.9rem;
  --radius-lg: 1.35rem;
  --shell: 76rem;
  --transition: 160ms ease;
}

:root[data-theme="dark"] {
  --color-bg: #071426;
  --color-surface: #0e2038;
  --color-surface-raised: #132a48;
  --color-text: #f3f8ff;
  --color-muted: #a9bad0;
  --color-primary: #44d7ff;
  --color-primary-hover: #8be8ff;
  --color-secondary: #9b8cff;
  --color-border: #294361;
  --color-focus: #44d7ff;
  --color-success: #66d19e;
  --color-warning: #ffd276;
  --color-danger: #ff9ba8;
  --color-danger-surface: #3b1722;
  --shadow-card: 0 1rem 3rem rgb(0 0 0 / 28%);
}

*, *::before, *::after { box-sizing: border-box; }

html { min-width: 20rem; scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: var(--color-primary); text-underline-offset: 0.2em; }
a:hover { color: var(--color-primary-hover); }

h1, h2, h3 {
  margin: 0 0 0.75em;
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.025em;
}
h1 { font-size: clamp(2rem, 6vw, 3.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
p { margin: 0 0 1rem; }

.shell { width: min(100% - 2rem, var(--shell)); margin-inline: auto; }
.stack > * + * { margin-top: 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; inset: 0.5rem auto auto 0.5rem; padding: 0.65rem 1rem; background: var(--color-surface); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }

.site-header {
  position: relative;
  z-index: 20;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 94%, transparent);
  backdrop-filter: blur(0.8rem);
}
.header-inner { min-height: 4.75rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: 0.7rem; color: var(--color-text); text-decoration: none; font-family: var(--font-display); font-weight: 750; letter-spacing: 0.01em; }
.brand-mark-wrap { display: grid; place-items: center; width: 2.6rem; aspect-ratio: 1; overflow: hidden; border: 1px solid var(--color-border); border-radius: 50%; background: #071426; }
.brand-mark { width: 2.2rem; height: 2.2rem; object-fit: cover; }
.brand-name { white-space: nowrap; }

.nav-toggle { display: inline-grid; place-content: center; gap: 0.27rem; width: 2.75rem; height: 2.75rem; padding: 0; border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); background: var(--color-surface); }
.nav-toggle > span:not(.sr-only) { display: block; width: 1.15rem; height: 2px; background: currentColor; }
.primary-nav { display: none; position: absolute; inset: calc(100% + 1px) 0 auto; padding: 1rem; border-bottom: 1px solid var(--color-border); background: var(--color-surface); box-shadow: var(--shadow-card); }
.primary-nav[data-open="true"] { display: grid; gap: 0.25rem; }
.primary-nav > a { min-height: 2.75rem; display: flex; align-items: center; padding-inline: 0.75rem; color: var(--color-text); text-decoration: none; border-radius: var(--radius-sm); }
.primary-nav > a:hover { background: var(--color-bg); color: var(--color-primary); }
.orbit-trace { display: none; }
.nav-preferences { display: flex; flex-wrap: wrap; gap: 0.6rem; padding: 0.5rem 0.75rem 0; border-top: 1px solid var(--color-border); }
.compact-form { margin: 0; }
.compact-form select { min-height: 2.5rem; padding: 0.35rem 2rem 0.35rem 0.65rem; font-size: 0.875rem; }

main { min-height: 62vh; }
.message-region { padding-top: 1rem; }
.message { padding: 0.85rem 1rem; border: 1px solid var(--color-border); border-inline-start: 0.3rem solid var(--color-primary); border-radius: var(--radius-sm); background: var(--color-surface); }
.message--error { border-inline-start-color: var(--color-danger); }
.message--success { border-inline-start-color: var(--color-success); }

.site-footer { padding-block: 2rem; border-top: 1px solid var(--color-border); color: var(--color-muted); }
.footer-inner { display: flex; flex-direction: column; gap: 1rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 1rem; }

.card { border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-card); }
.account-shell { display: grid; place-items: start center; padding-block: clamp(2.5rem, 8vw, 6rem); }
.account-panel { width: min(100%, 39rem); padding: clamp(1.35rem, 5vw, 3rem); }
.account-panel > :last-child { margin-bottom: 0; }
.eyebrow { margin-bottom: 0.55rem; color: var(--color-secondary); font-family: var(--font-utility); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }

form p, form > div { margin: 0 0 1rem; }
label { display: block; margin-bottom: 0.35rem; font-weight: 700; }
input, select, textarea {
  width: 100%;
  min-height: 2.85rem;
  padding: 0.62rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  background: var(--color-surface);
  font: inherit;
}
input:hover, select:hover, textarea:hover { border-color: var(--color-muted); }
input:focus, select:focus, textarea:focus { border-color: var(--color-focus); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-focus) 22%, transparent); outline: none; }
input[type="checkbox"], input[type="radio"] { width: 1.1rem; min-height: 1.1rem; margin-inline: 0 0.4rem; accent-color: var(--color-primary); }
input[aria-invalid="true"], .errorlist + input { border-color: var(--color-danger); }
.errorlist { margin: 0.25rem 0 0.65rem; padding-inline-start: 1.25rem; color: var(--color-danger); font-weight: 650; }
.helptext { display: block; margin-top: 0.3rem; color: var(--color-muted); font-size: 0.875rem; }

.button, button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: #fff;
  background: var(--color-primary);
  font: 700 0.95rem/1.2 var(--font-body);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
}
:root[data-theme="dark"] .button, :root[data-theme="dark"] button:not(.nav-toggle) { color: #071426; }
.button:hover, button:hover { color: #fff; background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
:root[data-theme="dark"] .button:hover, :root[data-theme="dark"] button:not(.nav-toggle):hover { color: #071426; }
.nav-toggle:hover { color: var(--color-primary); background: var(--color-surface-raised); border-color: var(--color-primary); }
.button:active, button:active { transform: translateY(1px); }
.button:disabled, button:disabled, .button[aria-disabled="true"] { opacity: 0.52; cursor: not-allowed; transform: none; }
.button--quiet { color: var(--color-primary); background: transparent; }
.button--quiet:hover { color: var(--color-text); background: var(--color-bg); }
:root[data-theme="dark"] .button--quiet { color: var(--color-primary); background: transparent; }
:root[data-theme="dark"] .button--quiet:hover { color: var(--color-text); background: var(--color-surface-raised); border-color: var(--color-primary); }
.button--danger { border-color: var(--color-danger); color: #fff; background: var(--color-danger); }

.identity-list { margin-block: 1.5rem; }
.identity-list > div { padding-block: 0.8rem; border-bottom: 1px solid var(--color-border); }
.identity-list dt { color: var(--color-muted); font-size: 0.85rem; }
.identity-list dd { margin: 0.2rem 0 0; overflow-wrap: anywhere; font-family: var(--font-utility); }
.preference-grid { display: grid; gap: 1rem; margin-top: 2rem; }
.preference-grid form { padding: 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); }

.status-badge { display: inline-flex; align-items: center; min-height: 1.75rem; padding: 0.2rem 0.6rem; border: 1px solid var(--color-border); border-radius: 99rem; color: var(--color-muted); font: 700 0.75rem/1 var(--font-utility); }
.status-badge--success { color: var(--color-success); border-color: currentColor; }
.status-badge--warning { color: var(--color-warning); border-color: currentColor; }
.status-badge--danger { color: var(--color-danger); border-color: currentColor; }
.pagination { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 0.75rem; margin-block: 2rem; }
.loading-state { display: flex; align-items: center; gap: 0.7rem; color: var(--color-muted); }
.spinner { width: 1.2rem; aspect-ratio: 1; border: 2px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: spin 700ms linear infinite; }
@keyframes spin { to { transform: rotate(1turn); } }
.state-panel { padding: 1.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.state-panel--error { border-inline-start: 0.3rem solid var(--color-danger); background: var(--color-danger-surface); }

.hero-shell { position: relative; isolation: isolate; min-height: 31rem; display: grid; align-items: center; overflow: hidden; }
.hero-art, .hero-art img, .hero-overlay { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-art img { object-fit: cover; object-position: 64% center; }
.hero-art-dark { display: none; }
:root[data-theme="dark"] .hero-art-light { display: none; }
:root[data-theme="dark"] .hero-art-dark { display: block; }
.hero-overlay { background: color-mix(in srgb, var(--color-bg) 58%, transparent); }
.hero-content { position: relative; z-index: 1; padding-block: 5rem; }

.public-hero { min-height: clamp(35rem, 72vh, 45rem); }
.public-hero .hero-overlay { background: linear-gradient(90deg, color-mix(in srgb, var(--color-bg) 96%, transparent) 0%, color-mix(in srgb, var(--color-bg) 84%, transparent) 52%, color-mix(in srgb, var(--color-bg) 24%, transparent) 100%); }
.hero-copy { width: min(100%, 48rem); }
.hero-copy h1 { max-width: 11ch; margin-bottom: 0.35em; font-size: clamp(3.2rem, 9vw, 6.8rem); }
.hero-mission { max-width: 46rem; color: var(--color-text); font-size: clamp(1.05rem, 2vw, 1.3rem); line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.75rem; }

.section-block { padding-block: clamp(4rem, 8vw, 7rem); }
.section-heading { max-width: 46rem; margin-bottom: 2rem; }
.section-heading > :last-child { margin-bottom: 0; }
.section-heading--row { max-width: none; display: flex; justify-content: space-between; gap: 1rem; }
.collection-section--tint { border-block: 1px solid var(--color-border); background: color-mix(in srgb, var(--color-surface) 65%, var(--color-bg)); }

.service-trace { display: grid; gap: 0; margin: 2.5rem 0 0; padding: 0; list-style: none; }
.service-trace li { position: relative; min-height: 7rem; display: grid; grid-template-columns: 3.5rem 1fr; align-items: center; gap: 0.75rem; border-inline-start: 1px solid var(--color-border); }
.service-trace li::before { content: ""; position: absolute; inset-inline-start: -0.45rem; width: 0.8rem; aspect-ratio: 1; border: 2px solid var(--color-secondary); border-radius: 50%; background: var(--color-bg); }
.service-trace li::after { content: ""; position: absolute; inset-inline-start: 0.35rem; width: 2rem; border-top: 1px solid var(--color-border); }
.service-trace li span { padding-inline-start: 1rem; color: var(--color-muted); font: 700 0.75rem/1 var(--font-utility); }
.service-trace li strong { font-family: var(--font-display); font-size: clamp(1.15rem, 2vw, 1.45rem); }

.empty-collection { min-height: 12rem; display: grid; place-items: center; align-content: center; gap: 0.8rem; padding: 2rem; border: 1px dashed var(--color-border); border-radius: var(--radius-lg); color: var(--color-muted); text-align: center; }
.empty-collection p { margin: 0; }
.empty-collection__orbit { position: relative; width: 2.8rem; aspect-ratio: 1; border: 1px solid var(--color-border); border-radius: 50%; }
.empty-collection__orbit::after { content: ""; position: absolute; inset: 50% auto auto 50%; width: 0.5rem; aspect-ratio: 1; border-radius: 50%; background: var(--color-secondary); transform: translate(45%, -50%); }
.collection-grid { display: grid; gap: 1rem; }

.project-grid { gap: clamp(1rem, 2.5vw, 1.5rem); }
.project-card { position: relative; min-width: 0; overflow: hidden; }
.project-card__cover { position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden; border-bottom: 1px solid var(--color-border); background: var(--color-surface-raised); }
.project-card__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 320ms ease; }
.project-card__cover:hover img, .project-card__cover:focus-visible img { transform: scale(1.025); }
.project-card__signal { position: absolute; inset: auto 1.1rem -0.42rem auto; width: 3.5rem; border-top: 1px solid var(--color-secondary); }
.project-card__signal::before, .project-card__signal::after { content: ""; position: absolute; top: -0.33rem; width: 0.55rem; aspect-ratio: 1; border: 1px solid var(--color-secondary); border-radius: 50%; background: var(--color-surface); }
.project-card__signal::before { left: 0; }
.project-card__signal::after { right: 0; background: var(--color-secondary); }
.project-card__body { padding: clamp(1.15rem, 3vw, 1.5rem); }
.project-card__body h3 { margin: 0.8rem 0 0.45rem; font-size: clamp(1.25rem, 2vw, 1.55rem); }
.project-card__body h3 a { color: var(--color-text); text-decoration: none; }
.project-card__body h3 a:hover { color: var(--color-primary); }
.project-card__body > p { color: var(--color-muted); }
.project-card__action { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 750; text-decoration: none; }
.tag-list { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0; padding: 0; list-style: none; }
.tag-list li { padding: 0.2rem 0.55rem; border: 1px solid var(--color-border); border-radius: 99rem; color: var(--color-muted); background: var(--color-bg); font: 700 0.7rem/1.35 var(--font-utility); }

.project-index { min-height: 65vh; }
.project-index__heading { position: relative; padding-bottom: 1.25rem; border-bottom: 1px solid var(--color-border); }
.project-index__heading::after { content: ""; position: absolute; inset: auto auto -0.35rem 0; width: 0.65rem; aspect-ratio: 1; border-radius: 50%; background: var(--color-secondary); }
.project-page__shell { width: min(100% - 2rem, 68rem); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 2rem; color: var(--color-muted); font-size: 0.875rem; }
.project-page__header { display: grid; gap: clamp(2rem, 6vw, 4rem); align-items: center; }
.project-page__summary { max-width: 42rem; color: var(--color-muted); font-size: clamp(1.08rem, 2vw, 1.3rem); }
.project-page__copy .tag-list { margin-top: 1.5rem; }
.project-page__cover { position: relative; overflow: visible; }
.project-page__cover img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); }
.project-page__orbit { position: absolute; z-index: -1; inset: -1rem -1rem auto auto; width: 5rem; aspect-ratio: 1; border: 1px solid color-mix(in srgb, var(--color-secondary) 70%, transparent); border-radius: 50%; }
.project-page__orbit::after { content: ""; position: absolute; inset: 50% auto auto -2.2rem; width: 2.2rem; border-top: 1px solid var(--color-secondary); }
.markdown-body { margin-top: clamp(3rem, 8vw, 6rem); padding: clamp(1.25rem, 5vw, 3rem); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-card); overflow-wrap: anywhere; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body > :last-child { margin-bottom: 0; }
.markdown-body h2, .markdown-body h3, .markdown-body h4 { margin-top: 1.6em; }
.markdown-body blockquote { margin-inline: 0; padding: 0.7rem 1rem; border-inline-start: 0.25rem solid var(--color-secondary); color: var(--color-muted); background: var(--color-bg); }
.markdown-body pre { max-width: 100%; overflow-x: auto; padding: 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); background: var(--color-bg); }
.markdown-body code { font-family: var(--font-utility); }
.markdown-body table { width: 100%; display: block; overflow-x: auto; border-collapse: collapse; }
.markdown-body th, .markdown-body td { padding: 0.65rem 0.8rem; border: 1px solid var(--color-border); text-align: start; }
.markdown-body th { background: var(--color-bg); }
.project-page__footer { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }

.comment-trace {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  padding: clamp(1.25rem, 4vw, 2.25rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-surface) 88%, var(--color-bg));
  scroll-margin-top: 2rem;
}
.comment-trace::before { content: ""; position: absolute; inset: 0 auto 0 1.55rem; border-inline-start: 1px solid color-mix(in srgb, var(--color-secondary) 48%, var(--color-border)); }
.comment-trace__heading { position: relative; display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; padding-inline-start: 1.5rem; }
.comment-trace__heading::before { content: ""; position: absolute; inset: 0 auto auto -0.18rem; width: 0.75rem; aspect-ratio: 1; border: 2px solid var(--color-secondary); border-radius: 50%; background: var(--color-surface); }
.comment-trace__heading h2 { margin-bottom: 0; }
.comment-trace__count { color: var(--color-muted); font: 700 0.75rem/1.4 var(--font-utility); }
.comment-composer, .comment-private { position: relative; margin: 1.25rem 0 1.75rem 1.5rem; padding: clamp(1rem, 3vw, 1.5rem); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.comment-composer h3, .comment-private h3 { margin-bottom: 0.45rem; font-size: 1.2rem; }
.comment-composer__note, .comment-private > p { color: var(--color-muted); }
.comment-composer form > button { margin-top: 0.85rem; }
.comment-list { display: grid; gap: 0.9rem; margin-inline-start: 1.5rem; }
.comment-private .comment-list { margin-inline-start: 0; }
.comment-private__pagination { margin-block: 1.25rem 0; padding-top: 1rem; border-top: 1px solid var(--color-border); }
.comment-card { position: relative; min-width: 0; padding: 1.1rem 1.15rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.comment-card::before { content: ""; position: absolute; inset: 1.4rem auto auto -1.95rem; width: 0.7rem; aspect-ratio: 1; border: 1px solid var(--color-secondary); border-radius: 50%; background: var(--color-bg); }
.comment-card--private { border-inline-start: 0.25rem solid var(--color-warning); background: color-mix(in srgb, var(--color-surface) 92%, var(--color-warning)); }
.comment-private .comment-card::before { display: none; }
.comment-card__header { display: flex; align-items: start; justify-content: space-between; gap: 1rem; color: var(--color-muted); font-size: 0.82rem; }
.comment-card__header > div { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
.comment-card__header strong { color: var(--color-text); font-size: 0.95rem; }
.comment-card__header time { flex: none; font-family: var(--font-utility); }
.comment-card__body { margin: 0.9rem 0 0; overflow-wrap: anywhere; white-space: pre-wrap; }
.comment-card__actions { display: flex; flex-wrap: wrap; align-items: start; gap: 0.65rem; margin-top: 1rem; padding-top: 0.85rem; border-top: 1px solid var(--color-border); }
.comment-card__actions details { flex: 1 1 18rem; }
.comment-card__actions summary { width: fit-content; list-style: none; }
.comment-card__actions summary::-webkit-details-marker { display: none; }
.comment-edit-form { margin-top: 0.8rem; padding: 1rem; border-radius: var(--radius-sm); background: var(--color-bg); }
.comment-edit-form button { margin-top: 0.75rem; }
.comment-delete-form { margin: 0; }
.comment-empty { margin-inline-start: 1.5rem; background: var(--color-surface); }
.comment-history-hidden { margin-inline-start: 1.5rem; color: var(--color-muted); }

.knowledge-index { min-height: 65vh; }
.knowledge-index__layout { display: grid; gap: clamp(2rem, 6vw, 5rem); }
.knowledge-index__header { align-self: start; padding-bottom: 1.25rem; border-bottom: 1px solid var(--color-border); }
.knowledge-index__header > p:not(.eyebrow) { max-width: 35rem; color: var(--color-muted); }
.knowledge-grid { display: grid; gap: clamp(1rem, 2.5vw, 1.5rem); }
.article-card { min-width: 0; overflow: hidden; }
.article-card__cover { display: block; aspect-ratio: 16 / 9; overflow: hidden; border-bottom: 1px solid var(--color-border); background: var(--color-surface-raised); }
.article-card__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 320ms ease; }
.article-card__cover:hover img, .article-card__cover:focus-visible img { transform: scale(1.025); }
.article-card__body { padding: clamp(1.15rem, 3vw, 1.55rem); }
.article-card--text-only .article-card__body { padding-top: clamp(1.5rem, 4vw, 2.15rem); }
.article-card__body h3 { margin: 1rem 0 0.45rem; font-size: clamp(1.3rem, 2vw, 1.6rem); }
.article-card__body h3 a { color: var(--color-text); text-decoration: none; }
.article-card__body h3 a:hover { color: var(--color-primary); }
.article-card__body > p { color: var(--color-muted); }
.article-card__body .tag-list { margin-block: 1rem; }
.article-card__action { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 750; text-decoration: none; }
.tag-list a { color: inherit; text-decoration: none; }
.tag-list a:hover { color: var(--color-primary); }
.knowledge-trace { position: relative; display: flex; flex-wrap: wrap; gap: 0.7rem 1.3rem; margin: 0; padding-inline-start: 0.8rem; color: var(--color-muted); font: 700 0.7rem/1.4 var(--font-utility); }
.knowledge-trace::before { content: ""; position: absolute; inset: 0.48rem auto auto 0; width: 100%; border-top: 1px solid var(--color-border); }
.knowledge-trace__node { position: relative; z-index: 1; padding-inline: 0.35rem; color: inherit; background: var(--color-surface); text-decoration: none; }
.knowledge-trace__node::before { content: ""; display: inline-block; width: 0.5rem; aspect-ratio: 1; margin-inline-end: 0.4rem; border: 1px solid var(--color-secondary); border-radius: 50%; background: var(--color-surface); }
.knowledge-trace__node:nth-child(2)::before { background: var(--color-secondary); }
.knowledge-page__shell { width: min(100% - 2rem, 72rem); }
.knowledge-page__header { display: grid; gap: clamp(2rem, 6vw, 4rem); align-items: center; }
.knowledge-page__header--text-only { display: block; max-width: 54rem; }
.knowledge-page__excerpt { max-width: 44rem; color: var(--color-muted); font-size: clamp(1.08rem, 2vw, 1.3rem); }
.knowledge-page__copy .knowledge-trace { margin-block: 1.5rem 1rem; }
.knowledge-page__byline { color: var(--color-muted); font-size: 0.875rem; }
.knowledge-page__copy .tag-list { margin-top: 1rem; }
.knowledge-page__cover img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); }
.knowledge-body { width: min(100%, 48rem); margin-inline: auto; font-size: 1.04rem; line-height: 1.8; }
.knowledge-body img { width: auto; max-width: 100%; height: auto; margin-inline: auto; border-radius: var(--radius-sm); }
.knowledge-page__footer { width: min(100%, 48rem); margin: 2rem auto 0; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }
.knowledge-search-quick { margin-top: 1.5rem; }
.knowledge-search-quick > div { display: flex; gap: 0.55rem; }
.knowledge-search-quick input { min-width: 0; }
.knowledge-search-quick button { flex: 0 0 auto; }
.knowledge-search__shell { width: min(100% - 2rem, 68rem); }
.knowledge-search__header { max-width: 46rem; }
.knowledge-search__header > p:last-child { color: var(--color-muted); }
.knowledge-search__form { display: grid; gap: 1rem; margin-block: 2rem 1.25rem; padding: clamp(1rem, 3vw, 1.5rem); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-card); }
.knowledge-search__form > div, .knowledge-search__form p { margin: 0; }
.knowledge-search__form button { align-self: end; }
.knowledge-search__summary { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.25rem; color: var(--color-muted); }
.knowledge-search__results { display: grid; gap: 1rem; }
.search-result { min-width: 0; padding: clamp(1rem, 3vw, 1.5rem); }
.search-result h2 { margin: 1rem 0 0.5rem; font-size: clamp(1.3rem, 2.6vw, 1.7rem); }
.search-result h2 a { color: var(--color-text); text-decoration: none; }
.search-result h2 a:hover { color: var(--color-primary); }
.search-result__excerpt { color: var(--color-text); font-weight: 650; }
.search-result__snippet { color: var(--color-muted); }
.search-result mark { padding-inline: 0.1em; color: var(--color-text); background: color-mix(in srgb, var(--color-secondary) 30%, transparent); }
.search-result__action { display: inline-flex; gap: 0.45rem; font-weight: 750; text-decoration: none; }
.knowledge-attachments { width: min(100%, 48rem); margin: 2.5rem auto 0; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }
.knowledge-attachments h2 { margin-top: 0.25rem; }
.knowledge-attachments ul { display: grid; gap: 0.7rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.knowledge-attachments li { min-width: 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; padding: 0.85rem 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); }
.knowledge-attachments li > div { min-width: 0; }
.knowledge-attachments strong, .knowledge-attachments span { display: block; overflow-wrap: anywhere; }
.knowledge-attachments span { margin-top: 0.25rem; color: var(--color-muted); font: 0.75rem/1.4 var(--font-utility); }

.tool-index { min-height: 65vh; }
.tool-index__layout { display: grid; gap: clamp(2rem, 6vw, 5rem); }
.tool-index__header { position: relative; align-self: start; padding-bottom: 1.25rem; border-bottom: 1px solid var(--color-border); }
.tool-index__header::after { content: ""; position: absolute; inset: auto auto -0.35rem 0; width: 0.65rem; aspect-ratio: 1; border-radius: 50%; background: var(--color-secondary); }
.tool-index__header > p:not(.eyebrow) { max-width: 34rem; color: var(--color-muted); }
.tool-index__legend { display: flex; flex-wrap: wrap; gap: 0.65rem 1rem; margin-top: 1.4rem; color: var(--color-muted); font: 700 0.72rem/1.4 var(--font-utility); }
.tool-index__legend span { display: inline-flex; align-items: center; gap: 0.4rem; }
.legend-dot { width: 0.5rem; aspect-ratio: 1; border: 1px solid currentColor; border-radius: 50%; }
.legend-dot--available { color: var(--color-success); background: var(--color-success); }
.legend-dot--maintenance { color: var(--color-warning); background: var(--color-warning); }
.legend-dot--coming-soon { color: var(--color-muted); }
.tool-grid { display: grid; gap: 1rem; }
.tool-card { position: relative; min-width: 0; overflow: hidden; }
.tool-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 0.18rem; background: var(--color-secondary); opacity: 0.7; }
.tool-card--maintenance::before { background: var(--color-warning); }
.tool-card--coming_soon::before { background: var(--color-muted); }
.tool-card__launch { display: grid; grid-template-columns: 4.75rem minmax(0, 1fr); gap: 1.1rem; min-height: 100%; padding: 1.25rem; color: var(--color-text); text-decoration: none; }
a.tool-card__launch:hover, a.tool-card__launch:focus-visible { background: color-mix(in srgb, var(--color-secondary) 7%, transparent); }
.tool-card__launch--inactive { cursor: default; }
.tool-card__icon { position: relative; display: grid; width: 4.75rem; aspect-ratio: 1; place-items: center; align-self: start; }
.tool-card__icon img { width: 3.8rem; height: 3.8rem; object-fit: cover; border: 1px solid var(--color-border); border-radius: 1rem; box-shadow: var(--shadow-card); }
.tool-card__orbit { position: absolute; inset: 0; border: 1px solid color-mix(in srgb, var(--color-secondary) 55%, transparent); border-radius: 50%; pointer-events: none; }
.tool-card__orbit::after { content: ""; position: absolute; inset: 50% -0.35rem auto auto; width: 0.55rem; aspect-ratio: 1; border-radius: 50%; background: var(--color-secondary); transform: translateY(-50%); }
.tool-card__body { min-width: 0; display: flex; flex-direction: column; align-items: start; }
.tool-card__signal { margin-bottom: 0.35rem; color: var(--color-muted); font: 700 0.66rem/1.2 var(--font-utility); letter-spacing: 0.09em; }
.tool-card__body > strong { font-family: var(--font-display); font-size: 1.25rem; line-height: 1.25; }
.tool-card__summary { margin-top: 0.45rem; color: var(--color-muted); line-height: 1.55; }
.tool-card__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.7rem; margin-top: 0.85rem; color: var(--color-muted); font: 700 0.7rem/1.4 var(--font-utility); }
.tool-card__action { display: inline-flex; align-items: center; gap: 0.4rem; margin-top: auto; padding-top: 1rem; color: var(--color-primary); font-weight: 750; }
.status-badge--available { color: var(--color-success); }
.status-badge--maintenance { color: var(--color-warning); }
.status-badge--coming_soon { color: var(--color-muted); }

.contact-section { padding-top: 1rem; }
.contact-panel { display: flex; flex-direction: column; gap: 1.5rem; justify-content: space-between; padding: clamp(1.5rem, 5vw, 3rem); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-card); }
.contact-panel h2 { margin-bottom: 0.35rem; }
.contact-email { overflow-wrap: anywhere; align-self: flex-start; font: 700 clamp(1rem, 3vw, 1.35rem)/1.4 var(--font-utility); }

.about-shell { min-height: 67vh; display: grid; align-items: center; padding-block: clamp(4rem, 10vw, 8rem); }
.about-grid { display: grid; gap: clamp(2rem, 7vw, 6rem); }
.about-statement > p { max-width: 49rem; font-family: var(--font-display); font-size: clamp(1.35rem, 3vw, 2.15rem); line-height: 1.55; }
.about-contact { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--color-border); }
.about-contact span { display: block; margin-bottom: 0.35rem; color: var(--color-muted); font-size: 0.875rem; }
.about-contact a { overflow-wrap: anywhere; font: 700 1rem/1.5 var(--font-utility); }
.error-page { min-height: 65vh; display: grid; place-items: center; padding-block: 4rem; }
.error-page .state-panel { width: min(100%, 38rem); }

@media (max-width: 35.999rem) {
  .comment-trace { padding-inline: 1rem; }
  .comment-trace::before { inset-inline-start: 1rem; }
  .comment-trace__heading { align-items: start; flex-direction: column; padding-inline-start: 1.1rem; }
  .comment-composer, .comment-private, .comment-list, .comment-empty, .comment-history-hidden { margin-inline-start: 1.1rem; }
  .comment-card::before { inset-inline-start: -1.55rem; }
  .comment-card__header { flex-direction: column; gap: 0.4rem; }
  .comment-card__actions, .comment-card__actions details, .comment-card__actions summary, .comment-delete-form, .comment-delete-form button { width: 100%; }
}

@media (min-width: 48rem) {
  .shell { width: min(100% - 3rem, var(--shell)); }
  .preference-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: row; align-items: center; justify-content: space-between; }
  .hero-art img { object-position: center; }
  .service-trace { grid-template-columns: repeat(4, 1fr); }
  .service-trace li { min-height: 8rem; grid-template-columns: 1fr; align-content: end; padding: 1rem; border-inline-start: 0; border-top: 1px solid var(--color-border); }
  .service-trace li::before { inset: -0.45rem auto auto 1rem; }
  .service-trace li::after { inset: 0.35rem auto auto 1.8rem; width: calc(100% - 0.8rem); }
  .service-trace li:last-child::after { display: none; }
  .service-trace li span { padding: 0; }
  .contact-panel { flex-direction: row; align-items: center; }
  .contact-email { align-self: auto; }
  .about-grid { grid-template-columns: minmax(12rem, 0.7fr) minmax(0, 1.5fr); }
  .project-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project-page__header { grid-template-columns: minmax(0, 0.9fr) minmax(18rem, 1.1fr); }
  .knowledge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .knowledge-page__header:not(.knowledge-page__header--text-only) { grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.9fr); }
  .knowledge-search__form { grid-template-columns: minmax(14rem, 2fr) minmax(9rem, 1fr) minmax(9rem, 1fr) auto; }
  .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .nav-toggle { display: none; }
  .primary-nav, .primary-nav[data-open="true"] { position: relative; inset: auto; display: flex; align-items: center; gap: 0.15rem; padding: 0; border: 0; background: transparent; box-shadow: none; }
  .primary-nav > a { min-height: 2.5rem; padding-inline: 0.65rem; }
  .orbit-trace { display: block; position: absolute; inset: 50% auto auto -0.45rem; width: 0.5rem; height: 0.5rem; border: 1px solid var(--color-secondary); border-radius: 50%; transform: translateY(-50%); }
  .orbit-trace::after { content: ""; position: absolute; left: 0.45rem; top: 50%; width: 1.4rem; border-top: 1px solid color-mix(in srgb, var(--color-secondary) 55%, transparent); }
  .nav-preferences { align-items: center; padding: 0 0 0 0.7rem; border: 0; border-inline-start: 1px solid var(--color-border); }
  .project-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .knowledge-index__layout { grid-template-columns: minmax(14rem, 0.58fr) minmax(0, 1.42fr); }
  .knowledge-index__header { position: sticky; top: 2rem; }
  .knowledge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool-index__layout { grid-template-columns: minmax(14rem, 0.55fr) minmax(0, 1.45fr); }
  .tool-index__header { position: sticky; top: 2rem; }
  .tool-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .tool-grid--featured { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}