/* ---------- Tokens ---------- */
:root {
  --ink: #17191c;
  --ink-soft: #494d52;
  --paper: #edece7;
  --panel: #f7f6f2;
  --panel-raised: #ffffff;
  --rule: #c7c4ba;
  --rule-soft: #dcdad2;
  --steel: #3c6a86;
  --steel-dim: #6c8fa2;
  --temper: #b0752f;

  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --max: 1080px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  margin: 0;
  color: var(--ink);
}

a {
  color: var(--steel);
  text-decoration: none;
}
a:hover { color: var(--temper); }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--steel);
  outline-offset: 3px;
}

ul { margin: 0; padding: 0; list-style: none; }
p { margin: 0; }

/* ---------- Blueprint grid backdrop ---------- */
.blueprint-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(60,106,134,0.055) 0px, rgba(60,106,134,0.055) 1px, transparent 1px, transparent 88px),
    repeating-linear-gradient(90deg, rgba(60,106,134,0.055) 0px, rgba(60,106,134,0.055) 1px, transparent 1px, transparent 88px);
}

main, .site-nav, .site-footer { position: relative; z-index: 1; }

/* ---------- Nav ---------- */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px var(--gutter) 0;
}

.nav-mark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 6px 10px;
}
.nav-mark:hover { color: var(--ink); border-color: var(--steel); }

.site-nav nav { display: flex; gap: 28px; }
.site-nav nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.site-nav nav a:hover { color: var(--steel); }
.site-nav nav a.active {
  color: var(--steel);
  border-bottom: 1px solid var(--steel);
  padding-bottom: 2px;
}

.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 96px var(--gutter) 60px;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: start;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--steel);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(3rem, 7vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

.hero-lede {
  max-width: 46ch;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 13px 22px;
  border: 1px solid var(--ink);
  display: inline-block;
}
.btn-primary { background: var(--ink); color: var(--panel); }
.btn-primary:hover { background: var(--steel); border-color: var(--steel); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { border-color: var(--steel); color: var(--steel); }

/* ---------- Title block ---------- */
.title-block {
  border: 1px solid var(--ink);
  background: var(--panel-raised);
  margin-top: 8px;
}

.tb-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--ink);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.tb-head { background: var(--panel); }

.tb-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.tb-cell {
  padding: 14px 12px;
  border-bottom: 1px solid var(--rule-soft);
  border-right: 1px solid var(--rule-soft);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tb-cell:nth-child(2n) { border-right: none; }
.tb-cell:nth-last-child(-n+2) { border-bottom: none; }

.tb-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--steel-dim);
}
.tb-value {
  font-size: 0.92rem;
  color: var(--ink);
}

/* ---------- Section shell ---------- */
section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 84px var(--gutter);
  border-top: 1px solid var(--rule);
}

.section-head {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--paper);
  margin-bottom: 44px;
  padding: 18px 0 20px;
  border-bottom: 1px solid transparent;
  box-shadow: 0 0 0 rgba(23,25,28,0);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.section-head.is-stuck {
  border-bottom-color: var(--rule);
  box-shadow: 0 12px 18px -16px rgba(23,25,28,0.4);
}
.section-head-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.section-head h2 {
  font-size: 2rem;
}
.section-head p {
  color: var(--ink-soft);
  max-width: 60ch;
  margin-top: 10px;
}
.section-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--steel-dim);
  white-space: nowrap;
}

/* ---------- Experience: build layers ---------- */
.layers { display: flex; flex-direction: column; gap: 0; }

.layer {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 28px;
  padding: 32px 0;
  border-top: 1px solid var(--rule-soft);
}
.layer:first-child { border-top: none; }

.layer-marker {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 4px;
}
.layer-marker span {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--steel);
  border: 1px solid var(--steel-dim);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.layer-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}
.layer-top h3 { font-size: 1.2rem; }
.layer-dates {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  white-space: nowrap;
}
.layer-org {
  color: var(--steel);
  font-size: 0.95rem;
  margin-bottom: 14px;
}
.layer-content ul { display: flex; flex-direction: column; gap: 9px; }
.layer-content li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 0.97rem;
}
.layer-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 1px;
  background: var(--steel-dim);
}
.layer-content li strong { color: var(--ink); font-weight: 600; }

/* ---------- Projects ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--panel-raised);
  border: 1px solid var(--rule);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.project-card-head h3 { font-size: 1.1rem; margin-bottom: 8px; }
.project-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--temper);
  letter-spacing: 0.03em;
}

.project-card p { color: var(--ink-soft); font-size: 0.95rem; }

.project-outcomes { display: flex; flex-direction: column; gap: 6px; }
.project-outcomes li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}
.project-outcomes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 1px;
  background: var(--steel-dim);
}

.placeholder-card {
  border-style: dashed;
  border-color: var(--steel-dim);
}
.project-video {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--rule);
  background: var(--ink);
  overflow: hidden;
}
.project-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.placeholder-note {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--steel-dim);
}
.project-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--steel);
  align-self: flex-start;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
}
.project-link:hover { color: var(--temper); border-color: var(--temper); }

/* ---------- Skills ---------- */
.skills-table { border-top: 1px solid var(--rule-soft); }
.skills-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.skills-cat {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--steel);
  padding-top: 2px;
}
.skills-items { color: var(--ink-soft); font-size: 0.97rem; }

/* ---------- Education ---------- */
.edu-block {
  border: 1px solid var(--rule);
  background: var(--panel-raised);
  padding: 28px;
}
.edu-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}
.edu-top h3 { font-size: 1.2rem; }
.edu-top span {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.edu-org { color: var(--steel); margin: 6px 0 22px; }

.edu-results {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.edu-result {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 2px solid var(--steel-dim);
  padding-top: 8px;
}
.edu-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
}
.edu-result span:last-child { font-size: 0.95rem; }

/* ---------- Beyond ---------- */
.beyond-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.beyond-item {
  border-top: 1px solid var(--rule-soft);
  padding-top: 14px;
}
.beyond-item h3 { font-size: 1rem; margin-bottom: 6px; }
.beyond-item span { font-size: 0.88rem; color: var(--ink-soft); }

/* ---------- Contact ---------- */
.contact-block {
  border: 1px solid var(--ink);
  background: var(--panel-raised);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 32px;
  padding: 40px;
}
.contact-block h2 { font-size: 1.8rem; margin-bottom: 12px; }
.contact-block .contact-grid > div:first-child p { color: var(--ink-soft); max-width: 34ch; }

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}
.contact-links a {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
}
.contact-links a:hover { color: var(--steel); border-color: var(--steel); }

/* ---------- Footer ---------- */
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px var(--gutter) 48px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .beyond-grid { grid-template-columns: 1fr; }
  .edu-results { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .site-nav nav {
    position: fixed;
    inset: 0 0 auto auto;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(78vw, 300px);
    background: var(--panel);
    flex-direction: column;
    padding: 96px 32px;
    gap: 22px;
    transform: translateX(100%);
    transition: transform 0.25s ease;
    z-index: 5;
    border-left: 1px solid var(--ink);
  }
  .site-nav nav.open { transform: translateX(0); }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
    z-index: 6;
    cursor: pointer;
  }
  .nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--ink);
    display: block;
  }
  .tb-grid { grid-template-columns: 1fr; }
  .tb-cell:nth-child(2n) { border-right: 1px solid var(--rule-soft); }
  .tb-cell:last-child { border-bottom: none; }
  .layer { grid-template-columns: 44px 1fr; gap: 16px; }
  .layer-marker span { width: 32px; height: 32px; font-size: 0.75rem; }
}