:root {
  --bg: #f1f3f5; --surface: #fff; --ink: #333; --navy: #004b77;
  --accent: #008cdd; --muted: #60788a; --line: rgba(0,75,119,.2); --sidebar: 19rem;
}
*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 2rem; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 "Open Sans",sans-serif; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
h1,h2,h3,p,ul { margin-top: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
a:focus-visible,[role="button"]:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 100; top: 1rem; left: 1rem; padding: .75rem 1rem; transform: translateY(-180%); background: var(--navy); color: #fff; font-weight: bold; }
.skip-link:focus { transform: none; }

.sidebar { position: fixed; inset: 0 auto 0 0; z-index: 10; display: flex; flex-direction: column; width: var(--sidebar); padding: 3rem 2.25rem; background: var(--surface); border-right: 1px solid var(--line); }
.profile-card { width: 100%; max-width: 14.5rem; aspect-ratio: 1; perspective: 800px; cursor: pointer; }
.profile-card-inner { position: relative; width: 100%; height: 100%; transform-style: preserve-3d; transition: transform 500ms ease-in-out; }
.profile-card.flipped .profile-card-inner { transform: rotateY(-180deg); }
.profile-card-face { position: absolute; inset: 0; overflow: hidden; border: 1px solid var(--navy); border-radius: 4px; background: var(--surface); backface-visibility: hidden; box-shadow: 0 1px 1px rgba(0,0,0,.05); }
.profile-card-front { z-index: 2; }
.profile-card-front img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.profile-card-label { position: absolute; right: 0; bottom: 0; left: 0; padding: .75rem; background: linear-gradient(transparent,rgba(0,0,0,.62)); color: #fff; }
.profile-card-label h2 { margin: 0; color: #fff; font-size: 1rem; line-height: 1.35; letter-spacing: 0; }
.profile-card-label p { margin: .15rem 0 0; font-size: .65rem; opacity: .85; }
.profile-card-back { z-index: 1; display: flex; flex-direction: column; justify-content: center; padding: 1.25rem; transform: rotateY(-180deg); }
.profile-card-back h2 { margin: 0 0 .8rem; font-size: 1rem; line-height: 1.4; letter-spacing: 0; }
.profile-card-back ul { margin: 0; color: var(--navy); font-size: .78rem; line-height: 1.8; }
.profile-card-back a { display: block; width: 100%; margin-top: .75rem; color: var(--navy); font-size: .8125rem; font-weight: bold; }
@media (hover:hover) and (pointer:fine) { .profile-card:hover .profile-card-inner { transform: rotateY(-180deg); } }

.primary-navigation { display: block; margin-top: 2.5em; }
.primary-navigation a { position: relative; display: block; margin: .2rem 0; padding: .7rem 0; color: var(--muted); font-size: .9rem; font-weight: bold; text-align: center; }
.primary-navigation a::after { content: ""; position: absolute; right: -2.25rem; width: 3px; height: 0; background: var(--accent); }
.primary-navigation a:hover,.primary-navigation a.active { color: var(--accent); }
.primary-navigation a.active::after { height: 1.5rem; }

main { width: calc(100% - var(--sidebar)); margin-left: var(--sidebar); padding: 0 clamp(2rem,4vw,5rem); }
main>section { min-height: 70vh; padding: clamp(5rem,10vw,8rem) 0; border-bottom: 1px solid var(--line); }
.about-section { display: flex; min-height: 100vh; flex-direction: column; justify-content: center; }
.section-label { margin-bottom: 1rem; color: var(--accent); font-size: .72rem; font-weight: bold; letter-spacing: .14em; text-transform: uppercase; }
h1,main h2 { margin-bottom: 1.5rem; color: var(--ink); font-size: clamp(2.4rem,5vw,4.2rem); line-height: 1.05; letter-spacing: -.04em; }
.about-copy>p:not(.section-label) { width: min(100%,70rem); color: var(--muted); font-size: 1.05rem; line-height: 1.8; }
.about-copy .about-lead { color: var(--ink); font-size: clamp(1.15rem,2vw,1.35rem); }
.section-heading { display: grid; grid-template-columns: minmax(13rem,.7fr) 1fr; gap: 3rem; align-items: end; margin-bottom: 2.5rem; }
.section-heading h2 { margin: 0; }
.section-heading>p { margin: 0; color: var(--muted); line-height: 1.7; }
.widget-status { margin-bottom: 1.25rem; color: var(--muted); font-size: .85rem; }
.widget-status:empty { display: none; }

.card-grid { display: grid; margin: 0; padding: 0; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .9rem; }
.card-item { min-width: 0; }
.portfolio-card { display: flex; height: 100%; min-height: 20rem; overflow: hidden; flex-direction: column; border: 1px solid var(--navy); border-radius: 4px; background: var(--surface); box-shadow: 0 1px 1px rgba(0,0,0,.05); transition: transform .18s ease,box-shadow .18s ease; }
.portfolio-card:hover { color: inherit; transform: translateY(-3px); box-shadow: 0 7px 18px rgba(0,75,119,.12); }
.card-content { min-width: 0; flex: 1; padding: .99rem; }
.card-title { margin-bottom: 0; overflow: hidden; color: var(--ink); font-size: .99rem; line-height: 1.45; text-overflow: ellipsis; white-space: nowrap; }
.portfolio-card:hover .card-title { color: var(--accent); }
.card-url { display: block; margin-top: .2rem; overflow: hidden; color: var(--accent); font-size: .75rem; text-overflow: ellipsis; white-space: nowrap; }
.card-description { display: -webkit-box; margin: .75rem 0 0; overflow: hidden; color: var(--navy); font-size: .88rem; line-height: 1.65; -webkit-box-orient: vertical; -webkit-line-clamp: 6; line-clamp: 6; }
.card-date { display: block; margin-top: .75rem; color: var(--navy); font-size: .69rem; }
.card-meta { display: flex; min-height: 2.5rem; align-items: center; gap: .85rem; padding: 0 .99rem; border-top: 1px solid var(--navy); background: var(--bg); color: var(--navy); font-size: .7425rem; }
.meta-stat { display: inline-flex; align-items: center; gap: .3rem; margin-left: auto; }
.meta-stat+.meta-stat { margin-left: 0; }
.repo-meta-icon { width: 1rem; height: 1rem; flex: none; }
.repo-star-icon { fill: #f5c518; }
.repo-fork-icon { fill: var(--surface); stroke: var(--navy); stroke-width: 2; stroke-linecap: round; }
.article-source { display: block; margin-bottom: .5rem; color: var(--navy); font-size: .69rem; font-weight: bold; text-transform: uppercase; }
.article-tags { display: flex; flex-wrap: wrap; gap: .33rem; margin: .7425rem 0 0; }
.article-tags li { padding: .15rem .4rem; border: 1px solid var(--line); color: var(--navy); font-size: .6875rem; }
.article-footer { font-weight: bold; }

.contact-section { min-height: auto; }
.collaboration-copy {
  width: min(100%,70rem);
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
}
.contact-section>p:not(.section-label) { max-width: 47rem; color: var(--muted); font-size: 1.05rem; line-height: 1.8; }
.contact-links { display: flex; gap: .75rem; margin-top: 2rem; }
.contact-links a { padding: .75rem 1rem; border: 1px solid var(--navy); color: var(--navy); font-size: .82rem; font-weight: bold; }
.contact-links a:hover { background: var(--navy); color: #fff; }
.site-footer { display: flex; justify-content: space-between; padding: 2rem 0; color: var(--muted); font-size: .72rem; }
.site-footer p { margin: 0; }

@media (max-width:64rem) {
  :root { --sidebar: 16rem; }
  .sidebar { padding-inline: 1.6rem; }
  .primary-navigation a::after { right: -1.6rem; }
  main { padding-inline: 2.5rem; }
  .card-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width:48rem) {
  html { scroll-padding-top: 13rem; }
  .sidebar { position: sticky; inset: 0 0 auto; display: block; width: 100%; padding: 1rem; border-right: 0; border-bottom: 1px solid var(--line); }
  .profile-card { width: clamp(7rem,24vw,8.5rem); margin-bottom: .65rem; }
  .profile-card-back { padding: .7rem; }
  .profile-card-back h2 { margin-bottom: .35rem; font-size: .8rem; }
  .profile-card-back ul { font-size: .58rem; line-height: 1.55; }
  .profile-card-back a { margin-top: .35rem; font-size: .6rem; }
  .primary-navigation { display: flex; gap: 1rem; margin: 0; overflow-x: auto; }
  .primary-navigation a { flex: none; padding: .5rem 0; font-size: .75rem; }
  .primary-navigation a::after { right: 0; bottom: 0; width: 100%; height: 2px; transform: scaleX(0); }
  .primary-navigation a.active::after { height: 2px; transform: scaleX(1); }
  main { width: 100%; margin: 0; padding-inline: 1rem; }
  main>section { min-height: auto; padding: 6.5rem 0; }
  .about-section { min-height: calc(100vh - 12rem); }
  .section-heading { grid-template-columns: 1fr; gap: 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  .portfolio-card { min-height: 19rem; }
  .site-footer { flex-direction: column; gap: .25rem; }
}
@media (max-width:24rem) { h1,main h2 { font-size: 2.35rem; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior: auto; } .profile-card-inner,.portfolio-card { transition: none; } }