/* ---- Tokens ---- */
:root {
  --paper: #E9EEF0;
  --paper-raised: #F4F7F7;
  --ink: #14202B;
  --ink-soft: #3C4C58;
  --blue: #1F4E79;
  --brass: #B8873A;
  --grid-line: #C7D4D6;
  --grid-overlay: rgba(31, 78, 121, 0.05);
  --moss: #4C7A5E;

  --font-display: "Newsreader", "Iowan Old Style", serif;
  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --max-width: 1080px;
  --edge: clamp(1.25rem, 4vw, 3rem);
}

/* ---- Reset ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 118.75%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.55;
  background-image:
    linear-gradient(var(--grid-overlay) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-overlay) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
}
h1, h2, h3, h4 { margin: 0; font-weight: 600; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75em 1.25em;
  z-index: 100;
  font-family: var(--font-mono);
}
.skip-link:focus { left: var(--edge); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--grid-line);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem var(--edge);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mark {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.06em;
  font-size: 0.95rem;
}
.nav-list {
  display: flex;
  gap: 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.nav-list a {
  position: relative;
  padding-bottom: 3px;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1.5px;
  background: var(--brass);
  transition: right 0.25s ease;
}
.nav-list a:hover::after,
.nav-list a:focus-visible::after { right: 0; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 32px; height: 32px;
  background: none;
  border: 1px solid var(--ink);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  margin: 0 6px;
  background: var(--ink);
}

/* ---- Hero ---- */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6rem) var(--edge) clamp(2.5rem, 6vw, 4rem);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.25rem;
}
.headline {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.subhead {
  margin-top: 1.5rem;
  max-width: 46ch;
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.6;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.25rem;
}
.btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.75em 1.25em;
  border: 1px solid var(--ink);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--blue); border-color: var(--blue); transform: translateY(-1px); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); transform: translateY(-1px); }

.hero-figure {
  border: 1px solid var(--grid-line);
  background: var(--paper-raised);
  padding: 1rem;
}
.hero-figure canvas { width: 100%; height: auto; }
.hero-figure figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

/* ---- Sections ---- */
.section {
  border-top: 1px solid var(--grid-line);
}
.section-alt { background: var(--paper-raised); }
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 4.5rem) var(--edge);
}
.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--brass);
  margin-bottom: 2.5rem;
}

/* ---- Reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Timeline / entries ---- */
.timeline { display: flex; flex-direction: column; gap: 2.5rem; }
.entry, .edu-entry {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--grid-line);
}
.timeline .entry:last-child { border-bottom: none; padding-bottom: 0; }
.entry-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1rem;
  margin-bottom: 0.9rem;
}
.entry-head h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
}
.entry-role {
  color: var(--blue);
  font-weight: 500;
  font-size: 0.95rem;
}
.entry-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-left: auto;
}
.entry-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 62ch;
}
.entry-body li {
  position: relative;
  padding-left: 1.1rem;
}
.entry-body li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--brass);
}
.entry-tools {
  margin-top: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.edu-entry { display: flex; flex-direction: column; gap: 0.9rem; margin-bottom: 2rem; }
#education .edu-entry:last-child { border-bottom: none; margin-bottom: 0; }

/* ---- Projects ---- */
.project-card {
  border: 1px solid var(--ink);
  background: var(--paper-raised);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}
.project-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}
.project-head h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.tag-live {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--moss);
  padding: 0.25em 0.6em;
}
.project-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue);
  border-bottom: 1px solid var(--blue);
}
.project-role {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-top: 0.6rem;
}
.project-desc {
  margin-top: 1.25rem;
  max-width: 68ch;
  line-height: 1.65;
}
.project-footnote {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
}
.inline-link {
  color: var(--blue);
  border-bottom: 1px solid var(--blue);
}
.inline-link:hover { color: var(--ink); border-color: var(--ink); }

.chip-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.25rem; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border: 1px solid var(--grid-line);
  padding: 0.4em 0.75em;
  color: var(--ink-soft);
}

/* ---- Skills ---- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem 2.5rem;
}
.skill-group h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ---- Record ---- */
.record-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  align-items: start;
}
.chess-award {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.chess-icon {
  width: 40px; height: 40px;
  flex-shrink: 0;
  color: var(--brass);
  margin-top: 0.2rem;
}
.chess-award h3 { font-family: var(--font-display); font-size: 1.1rem; }

/* ---- Contact ---- */
.contact-headline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  max-width: 20ch;
  margin-bottom: 1.5rem;
}
.contact-meta {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.contact-meta a { border-bottom: 1px solid var(--grid-line); }
.contact-meta a:hover { border-color: var(--ink); }
.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.social-row a { border-bottom: 1px solid var(--ink); padding-bottom: 2px; }
.social-row a:hover { color: var(--blue); border-color: var(--blue); }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--grid-line);
  padding: 1.5rem var(--edge);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
}

/* ---- Responsive ---- */
@media (max-width: 880px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-figure { order: -1; max-width: 420px; }
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-list {
    position: absolute;
    top: 100%;
    right: var(--edge);
    left: var(--edge);
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    border: 1px solid var(--grid-line);
    display: none;
  }
  .nav-list.is-open { display: flex; }
  .nav-list li { border-bottom: 1px solid var(--grid-line); }
  .nav-list li:last-child { border-bottom: none; }
  .nav-list a { display: block; padding: 0.9rem 1rem; }
  .entry-meta { margin-left: 0; }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn, .nav-list a::after {
    transition: none;
  }
}