/* ============================================================
   Theme tokens
   ============================================================ */
:root {
  --bg-base: #05070d;
  --bg-elevated: #0b1220;
  --bg-elevated-alpha: rgba(11, 18, 32, 0.72);
  --text-primary: #e8eef8;
  --text-muted: #93a4bd;
  --text-dim: #63748e;
  --accent-blue: #2f80ff;
  --accent-glow: #58b6ff;
  --glow-shadow: 0 0 14px rgba(88, 182, 255, 0.5);
  --border-subtle: rgba(88, 182, 255, 0.16);
  --border-faint: rgba(255, 255, 255, 0.06);
  --nav-height: 68px;
  --maxw: 1140px;
  --radius: 14px;
  --mono: "SFMono-Regular", "Consolas", "Liberation Mono", "Menlo", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

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

img { max-width: 100%; display: block; }

#circuit-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  display: block;
}

.glow { color: var(--accent-glow); }

.card {
  background: var(--bg-elevated-alpha);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius);
  padding: 1.5rem;
  backdrop-filter: blur(6px);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 1100;
  background: var(--accent-blue);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--accent-glow);
  outline-offset: 2px;
}

/* ============================================================
   Navigation
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 7, 13, 0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-faint);
}
.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  height: var(--nav-height);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}
.nav__brand:hover { text-decoration: none; }
.nav__brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent-blue);
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  box-shadow: var(--glow-shadow);
}
.nav__menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
}
.nav__link {
  display: inline-block;
  color: var(--text-muted);
  padding: 0.5rem 0.9rem;
  border-radius: 9px;
  font-size: 0.95rem;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav__link:hover, .nav__link:focus-visible { color: var(--text-primary); text-decoration: none; }
.nav__link.active { color: var(--accent-glow); }
.nav__link--cta {
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}
.nav__link--cta:hover { box-shadow: var(--glow-shadow); border-color: var(--accent-glow); }

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  cursor: pointer;
}
.nav__toggle-bar {
  width: 22px;
  height: 2px;
  background: var(--accent-glow);
  margin: 0 auto;
}

/* ============================================================
   Section scaffolding
   ============================================================ */
.section {
  scroll-margin-top: var(--nav-height);
  padding: 5.5rem 0;
  border-bottom: 1px solid var(--border-faint);
}
.section__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section__head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: end;
  margin-bottom: 2.75rem;
}
.section__index {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin: 0 0 0.75rem;
}
.section__title {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.01em;
}
.section__note {
  color: var(--text-muted);
  margin: 0;
  align-self: end;
  max-width: 42ch;
}

/* ============================================================
   Hero
   ============================================================ */
.section--hero {
  border-bottom: 1px solid var(--border-faint);
  padding: 4rem 0 5.5rem;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.25fr 0.9fr;
  gap: 3rem;
  align-items: center;
  min-height: calc(100vh - var(--nav-height) - 9.5rem);
}
.hero__status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin: 0 0 1.5rem;
}
.hero__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #3ee08a;
  box-shadow: 0 0 10px #3ee08a;
}
.hero__headline {
  font-size: clamp(2.6rem, 6.5vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
  font-weight: 700;
}
.hero__lede {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 46ch;
  margin: 0 0 2rem;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.25rem;
}
.hero__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}
.hero__tags li {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  border: 1px solid var(--border-faint);
  border-radius: 7px;
  padding: 0.35rem 0.7rem;
  background: rgba(255, 255, 255, 0.02);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: box-shadow 0.2s ease, transform 0.1s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary {
  background: var(--accent-blue);
  color: #fff;
  box-shadow: var(--glow-shadow);
}
.btn--primary:hover { box-shadow: 0 0 24px rgba(88, 182, 255, 0.85); }
.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
.btn--ghost:hover { box-shadow: var(--glow-shadow); border-color: var(--accent-glow); }
.btn--lg { padding: 0.95rem 1.8rem; font-size: 1.05rem; }

/* Profile card */
.profile-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 32, 56, 0.5), rgba(11, 18, 32, 0.6));
  backdrop-filter: blur(8px);
  padding: 1.5rem;
}
.profile-card__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-faint);
}
.profile-card__live { color: #3ee08a; }
.profile-card__chip {
  display: grid;
  place-items: center;
  padding: 1.75rem 0 1.5rem;
}
.profile-card__photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-blue);
  box-shadow: 0 0 26px rgba(47, 128, 255, 0.45);
}
.profile-card__specs {
  margin: 0;
  display: grid;
  gap: 0;
}
.profile-card__specs > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border-faint);
}
.profile-card__specs dt {
  color: var(--text-dim);
  font-size: 0.85rem;
}
.profile-card__specs dd {
  margin: 0;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: right;
}

/* ============================================================
   Projects
   ============================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}
.project-card {
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, transform 0.2s ease, border-color 0.25s ease;
}
.project-card:hover {
  box-shadow: var(--glow-shadow);
  border-color: var(--border-subtle);
  transform: translateY(-4px);
}
.project-card__kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin: 0 0 0.6rem;
}
.project-card__title {
  margin: 0 0 0.7rem;
  font-size: 1.3rem;
  color: var(--text-primary);
  line-height: 1.2;
}
.project-card__desc {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  flex: 1;
}
.project-card__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}
.project-card__tags li {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px solid var(--border-faint);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
}

/* ============================================================
   Skills / capabilities
   ============================================================ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.skills__group { position: relative; }
.skills__num {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}
.skills__category {
  margin: 1.5rem 0 0.6rem;
  color: var(--text-primary);
  font-size: 1.35rem;
}
.skills__blurb {
  color: var(--text-muted);
  margin: 0 0 1.25rem;
}
.skills__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skills__list li {
  font-family: var(--mono);
  font-size: 0.78rem;
  background: rgba(47, 128, 255, 0.1);
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  padding: 0.32rem 0.7rem;
  color: var(--text-primary);
}
.skills__footer {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.skills__facts-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-glow);
}
.skills__facts p {
  margin: 0.6rem 0 0;
  color: var(--text-muted);
}

/* ============================================================
   About
   ============================================================ */
.about__lead p { margin: 0 0 1rem; max-width: 52ch; }
.about__lead p:last-child { margin-bottom: 0; }
.about__muted { color: var(--text-muted); }
.about__gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 0 0 2.75rem;
}
.about__photo {
  margin: 0;
  border: 1px solid var(--border-faint);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
}
.about__photo img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}
.about__photo figcaption {
  padding: 0.85rem 1.1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-faint);
}

/* Experience */
.experience {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.experience__when {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin: 0 0 1.5rem;
}
.experience__org {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin: 0 0 0.35rem;
}
.experience__role {
  margin: 0 0 0.75rem;
  font-size: 1.3rem;
  color: var(--text-primary);
}
.experience__item p:last-child { margin-bottom: 0; color: var(--text-muted); }

/* ============================================================
   AI
   ============================================================ */
.ai__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.ai__heading {
  margin: 0 0 0.6rem;
  color: var(--text-primary);
  font-size: 1.2rem;
}
.ai__block p { margin: 0; color: var(--text-muted); }

/* ============================================================
   Contact
   ============================================================ */
.section--contact { border-bottom: none; }
.contact__wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.contact__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.4rem;
}
.contact__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.4rem 0;
  font-size: 1.1rem;
  color: var(--text-primary);
}
.contact__link:hover { color: var(--accent-glow); }
.contact__label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  min-width: 4.5rem;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  padding: 2.5rem 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}
.site-footer__inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.site-footer p { margin: 0; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; gap: 2.5rem; min-height: 0; }
  .profile-card { max-width: 420px; }
  .section__head { grid-template-columns: 1fr; gap: 1rem; align-items: start; }
  .section__note { align-self: start; }
  .about__gallery { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav__toggle { display: flex; }
  .nav__menu {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.5rem 1rem 1rem;
    display: none;
  }
  .nav__menu.open { display: flex; }
  .nav__link { display: block; padding: 0.85rem 0.75rem; min-height: 44px; }
  .nav__link--cta { text-align: center; margin-top: 0.4rem; }
  .section { padding: 4rem 0; }
  .contact__wrap { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   Ethics / essays
   ============================================================ */
.essays__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}
.essay-card {
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, transform 0.2s ease, border-color 0.25s ease;
}
.essay-card:hover {
  box-shadow: var(--glow-shadow);
  border-color: var(--border-subtle);
  transform: translateY(-4px);
}
.essay-card__kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin: 0 0 0.6rem;
}
.essay-card__title {
  margin: 0 0 0.7rem;
  font-size: 1.25rem;
  color: var(--text-primary);
  line-height: 1.25;
}
.essay-card__desc {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  flex: 1;
}
.essay-card__link {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent-glow);
  align-self: flex-start;
}
.essay-card__link:hover { text-decoration: none; text-shadow: var(--glow-shadow); }

/* Project card report/read link (matches essay link) */
.project-card__link {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent-glow);
  align-self: flex-start;
  margin-top: 1rem;
}
.project-card__link:hover { text-decoration: none; text-shadow: var(--glow-shadow); }