:root {
  --bg:           #F6F1E4;
  --surface:      #FFFDF6;
  --ink:          #211E16;
  --ink-soft:     #2C2819;
  --body:         #4C4638;
  --muted:        #7C745F;
  --line:         #E0D8C3;
  --accent:       #2843B0;
  --accent-deep:  #1D3184;
  --accent-wash:  rgba(40, 67, 176, 0.06);
  --accent-edge:  rgba(40, 67, 176, 0.30);
  --grid-line:    rgba(40, 67, 176, 0.055);
  --on-dark:      #D9D2BD;
  --on-dark-dim:  #9A927B;
  --accent-light: #ADB9F1;

  --font-display: "IBM Plex Serif", "Iowan Old Style", Georgia, serif;
  --font-body:    "IBM Plex Sans", "Helvetica Neue", sans-serif;
  --font-mono:    "IBM Plex Mono", "SF Mono", monospace;

  --container:    1100px;
  --section-pad:  60px;
  --radius:       8px;
  --nav-height:   60px;

  --shadow-card:  0 10px 28px -18px rgba(33, 30, 22, 0.35);
}

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

html { -webkit-text-size-adjust: 100%; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  color: var(--body);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg);
}

body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 620px;
  background-image:
    linear-gradient(to right,  var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: linear-gradient(to bottom, #000 40%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 40%, transparent 100%);
  pointer-events: none;
  z-index: -1;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.18;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; text-underline-offset: 3px; }

img, svg { max-width: 100%; height: auto; }

ul { padding-left: 1.2em; margin: 0 0 1em; }
li { margin-bottom: 0.4em; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow { max-width: 720px; }

.section {
  padding: var(--section-pad) 0;
  scroll-margin-top: calc(var(--nav-height) + 16px);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}
.eyebrow::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.section-title {
  font-size: clamp(27px, 4vw, 34px);
  font-weight: 600;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  padding: 11px 20px;
  border-radius: 7px;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease,
              transform 0.2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover { background: var(--accent-deep); }

.btn--ghost {
  border-color: var(--line);
  color: var(--ink);
  background: var(--surface);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn--sm { padding: 6px 13px; font-size: 13px; border-radius: 6px; }

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  background: var(--accent-wash);
  border: 1px solid var(--accent-edge);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}
.tag-row li { margin: 0; }

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-height);
  background: rgba(246, 241, 228, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}
.nav--scrolled { border-bottom-color: var(--line); }

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav__brand {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}
.nav__brand:hover { text-decoration: none; color: var(--accent); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav__links::-webkit-scrollbar { display: none; }

.nav__links a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
  white-space: nowrap;
  padding: 4px 0;
}
.nav__links a:hover { color: var(--accent); text-decoration: none; }

.nav__links a.is-active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}

.nav__links a.btn--primary,
.nav__links a.btn--primary:hover {
  color: #fff;
  border-bottom: none;
}

.hero { padding-top: 64px; padding-bottom: 60px; }

.hero__meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin: 0 0 18px;
}

.hero__name {
  font-size: clamp(42px, 6.5vw, 62px);
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
}

.hero__tagline {
  font-size: clamp(18px, 2.4vw, 20px);
  max-width: 560px;
  margin: 0 0 30px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  align-items: center;
}

.hero__now {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 34px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}
.hero__now-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, border-color 0.25s ease,
              box-shadow 0.25s ease;
}
.project-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-edge);
  box-shadow: var(--shadow-card);
}

.project-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 34px;
  align-items: center;
  padding: 32px 34px;
}

.project-card__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

.project-card__title {
  font-size: 23px;
  font-weight: 600;
  margin: 0 0 10px;
}
.project-card--featured .project-card__title { font-size: 30px; }

.project-card__blurb { flex-grow: 1; margin-bottom: 0; }

.project-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 18px;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 600;
}

.project-card__diagram {
  background-color: var(--bg);
  background-image:
    linear-gradient(to right,  var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 16px;
}

.xp-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.xp-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.xp-item__dates {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  padding-top: 5px;
}

.xp-item__role { font-size: 19px; font-weight: 600; margin: 0 0 2px; }

.xp-item__org {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 8px;
}

.xp-item ul { margin-bottom: 0; }
.xp-item li:last-child { margin-bottom: 0; }

.skills-grid {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.skill-group {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 18px 24px;
  align-items: start;
}
.skill-group + .skill-group { border-top: 1px solid var(--line); }

.skill-group__name {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
  padding-top: 5px;
}

.skill-group .tag-row { margin-top: 0; }

.edu-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 30px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  column-gap: 36px;
}

.edu-card__school { font-size: 22px; font-weight: 600; margin: 0 0 4px; }

.edu-card__degree { font-size: 16px; margin: 0 0 4px; }

.edu-card__meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

.honors {
  grid-column: 2;
  grid-row: 1 / span 3;
  border-left: 1px solid var(--line);
  padding-left: 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 9px;
  align-content: center;
  list-style: none;
  margin: 0;
}
.honors li {
  padding-left: 18px;
  position: relative;
  margin: 0;
}
.honors li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 7px;
  height: 7px;
  background: var(--accent-wash);
  border: 1.5px solid var(--accent);
  border-radius: 2px;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.cert-card__name { font-size: 17px; font-weight: 600; margin: 0 0 4px; }

.cert-card__issuer {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

.contact {
  background: var(--ink);
  color: var(--on-dark);
  padding: 72px 0 0;
}

.contact .eyebrow { color: var(--accent-light); }
.contact .eyebrow::after { background: #3B3524; }

.contact .section-title { color: var(--bg); }

.contact__lede { max-width: 520px; margin-bottom: 30px; }

.contact__email {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.5vw, 32px);
  font-weight: 600;
  color: var(--bg);
  margin-bottom: 32px;
}
.contact__email:hover { color: var(--accent-light); text-decoration: none; }

.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.contact__links a {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--on-dark);
  border: 1px solid #443E2C;
  border-radius: 7px;
  padding: 9px 16px;
}
.contact__links a:hover {
  border-color: var(--accent-light);
  color: var(--bg);
  text-decoration: none;
  background: var(--ink-soft);
}

.footer {
  margin-top: 56px;
  border-top: 1px solid #35301F;
  padding: 22px 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--on-dark-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
}
.footer a { color: var(--on-dark-dim); }
.footer a:hover { color: var(--bg); }

.case-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--line);
}

.case-hero__title {
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 600;
  margin: 0 0 14px;
}

.case-hero__lede {
  font-size: 18.5px;
  max-width: 640px;
  margin-bottom: 22px;
}

.case-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  list-style: none;
  margin: 0;
  padding: 0;
}
.case-hero__facts li { margin: 0; }

.case-body {
  max-width: 720px;
  padding-top: 48px;
  padding-bottom: 72px;
}

.case-body h2 {
  font-size: 24px;
  margin: 40px 0 12px;
}
.case-body h2:first-child { margin-top: 0; }

.case-body .project-card__diagram { margin: 10px 0 20px; }

.case-back {
  display: inline-block;
  margin-top: 36px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
}

.footer--light {
  margin-top: 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.footer--light .container { width: 100%; }
.footer--light a { color: var(--muted); }
.footer--light a:hover { color: var(--accent); }

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn:hover, .project-card:hover { transform: none; }
}

@media (max-width: 900px) {
  .project-card--featured {
    grid-template-columns: 1fr;
    gap: 26px;
  }
}

@media (max-width: 760px) {
  :root { --section-pad: 48px; }

  .hero { padding-top: 52px; padding-bottom: 60px; }

  .project-grid,
  .cert-grid { grid-template-columns: 1fr; }

  .skill-group {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 16px 20px;
  }
  .skill-group__name { padding-top: 0; }

  .edu-card { grid-template-columns: 1fr; }
  .honors {
    grid-column: 1;
    grid-row: auto;
    border-left: none;
    padding-left: 0;
    margin-top: 20px;
  }

  .xp-item {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 20px 0;
  }
}

@media (max-width: 560px) {
  .nav__brand { display: none; }
  .nav__inner { justify-content: center; }

  .nav__inner { padding: 0 16px; }
  .nav__links { gap: 13px; }
  .nav__links a { font-size: 11px; }
  .nav__links .btn { display: none; }

  .project-card,
  .project-card--featured { padding: 24px 20px; }

  .edu-card { padding: 24px 20px; }
}