/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem var(--gutter);
  transition: background var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out),
              padding var(--dur-med) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: var(--panel-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--hairline);
  padding-block: 1rem;
}
.nav__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--ivory);
}
.nav__right {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}
.nav__links {
  display: flex;
  gap: 2rem;
}
.nav__links a {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--ivory-2);
  position: relative;
  padding-bottom: 3px;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right var(--dur-fast) var(--ease-out);
}
.nav__links a:hover::after, .nav__links a:focus-visible::after { right: 0; }
.nav__links a:hover, .nav__links a:focus-visible { color: var(--ivory); }

.clock {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ivory-2);
}

.nav__menu-btn { display: none; }

@media (max-width: 820px) {
  .nav__links { display: none; }
  .clock { display: none; }
  .nav__menu-btn {
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
  }
  .nav__menu-btn span {
    width: 22px;
    height: 1px;
    background: var(--ivory);
    transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
  }
  body.menu-open .nav__menu-btn span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  body.menu-open .nav__menu-btn span:nth-child(2) { opacity: 0; }
  body.menu-open .nav__menu-btn span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* ---------- Mobile menu overlay ---------- */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--void);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 6.5rem var(--gutter) 2rem;
  overflow-y: auto;
  transform: translateY(-100%);
  visibility: hidden;
  transition: transform var(--dur-med) var(--ease-in-out), visibility 0s linear var(--dur-med);
}
body.menu-open .menu-overlay { transform: translateY(0); visibility: visible; transition-delay: 0s; }
.menu-overlay__links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.menu-overlay__links a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vh, 2.8rem);
  line-height: 1.2;
  color: var(--ivory);
}
.menu-overlay__links a:hover, .menu-overlay__links a:focus-visible { color: var(--accent); }
.menu-overlay__foot {
  margin-top: 3rem;
  display: flex;
  gap: 1.5rem;
}
.menu-overlay__foot a { font-family: var(--font-mono); font-size: var(--fs-mono); color: var(--ivory-2); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.06em;
  padding: 0.9rem 1.5rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 2px;
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  min-height: 44px;
}
.btn--primary {
  background: var(--accent);
  color: var(--void);
  border-color: var(--accent);
}
.btn--primary:hover, .btn--primary:focus-visible {
  background: var(--accent-hi);
  border-color: var(--accent-hi);
}
.btn--ghost {
  color: var(--ivory);
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Section furniture ---------- */
.section {
  position: relative;
  padding-block: clamp(5rem, 10vw, 9rem);
  padding-inline: var(--gutter);
}
.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}
.section-head .index { color: var(--accent); }
.section-head h2 { font-style: italic; }
.rule {
  height: 1px;
  background: var(--hairline);
  border: none;
}
.rule--strong { background: var(--hairline-strong); }

/* ---------- Experience rows ---------- */
.exp-row {
  border-top: 1px solid var(--hairline);
  padding-block: 2.25rem;
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 1.5rem;
}
.exp-row:last-child { border-bottom: 1px solid var(--hairline); }
.exp-row--edu .exp-row__role { font-size: 1.25rem; }
.exp-row__date { padding-top: 0.3rem; }
.exp-row__role { font-size: 1.5rem; margin-bottom: 0.25rem; }
.exp-row__employer { color: var(--ivory-2); font-size: var(--fs-small); margin-bottom: 1rem; }
.exp-row__bullets { display: flex; flex-direction: column; gap: 0.55rem; max-width: 62ch; }
.exp-row__bullets li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--ivory-2);
  font-size: 0.9725rem;
}
.exp-row__bullets li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.65em;
  width: 5px; height: 1px;
  background: var(--accent);
}

@media (max-width: 700px) {
  .exp-row { grid-template-columns: 1fr; }
}

/* ---------- Project cards ---------- */
.work-feature {
  border: 1px solid var(--hairline);
  padding: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.work-feature > div { max-width: 46rem; }
.work-feature h3 { font-size: clamp(1.8rem, 3vw, 2.5rem); font-style: italic; margin-bottom: 0.75rem; }
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}
.work-card {
  background: var(--void);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  transition: background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.work-card:hover, .work-card:focus-within {
  background: var(--panel);
}
.work-card__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.work-card h4 { font-size: 1.4rem; font-style: italic; }
.work-card h4 a { display: inline-flex; align-items: baseline; gap: 0.5rem; }
.work-card h4 a .ext { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ivory-3); }
.work-card h4 a:hover, .work-card h4 a:focus-visible { color: var(--accent); }
.work-card p { color: var(--ivory-2); font-size: 0.95rem; }
.work-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tag {
  border: 1px solid var(--hairline-strong);
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
  font-size: 0.75rem;
  color: var(--ivory-3);
}
.work-note { margin-top: 2rem; color: var(--ivory-3); font-size: var(--fs-small); }
.work-note a { color: var(--ivory-2); text-decoration: underline; text-underline-offset: 3px; }
.work-note a:hover, .work-note a:focus-visible { color: var(--accent); }

@media (max-width: 900px) {
  .work-grid { grid-template-columns: 1fr; }
}

/* ---------- Capabilities (definition list) ---------- */
.cap-row {
  display: grid;
  grid-template-columns: 14rem 1fr;
  gap: 1.5rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--hairline);
}
.cap-row:last-child { border-bottom: 1px solid var(--hairline); }
.cap-row dt { color: var(--accent); }
.cap-row dd { color: var(--ivory-2); }

@media (max-width: 700px) {
  .cap-row { grid-template-columns: 1fr; gap: 0.5rem; }
}

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: clamp(3rem, 6vw, 5rem);
}
.stat__value {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  color: var(--accent);
  font-style: italic;
}
.stat__label { color: var(--ivory-2); margin-top: 0.4rem; }

@media (max-width: 700px) {
  .stats { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ---------- Contact links ---------- */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
  margin-top: 2.5rem;
}
.contact-links a {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--hairline-strong);
  padding-bottom: 4px;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.contact-links a:hover, .contact-links a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}