*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0a0a0a;
  --white: #f5f5f0;
  --mid: #888;
  --line: 2px solid #0a0a0a;
  --line-thin: 1px solid #0a0a0a;
}

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  background: var(--white);
  color: var(--black);
  font-family: 'Syne', sans-serif;
  overflow-x: hidden;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 3rem;
  height: 64px;
  background: var(--white);
  border-bottom: var(--line);
}
.nav-logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.6rem;
  letter-spacing: .08em;
  text-decoration: none;
  color: var(--black);
}
.nav-links { display: flex; gap: 2.5rem; }
.nav-links a {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--black);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute; bottom: -4px; left: 0; right: 100%;
  height: 2px; background: var(--black);
  transition: right .25s ease;
}
.nav-links a:hover::after { right: 0; }

/* ── HAMBURGER ── */
.nav-hamburger {
  display: none;
  flex-direction: column; justify-content: center; align-items: center;
  gap: 5px;
  width: 40px; height: 40px;
  cursor: pointer;
  background: none; border: none;
  padding: 4px;
  position: relative; z-index: 200;
}
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--black);
  transition: transform .3s ease, opacity .3s ease, width .3s ease;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── MOBILE MENU OVERLAY ── */
.mobile-menu {
  display: none;
  position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--white);
  z-index: 99;
  flex-direction: column;
  border-top: var(--line);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}
.mobile-menu-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.5rem;
  height: calc((100vh - 64px) / 7);
  border-bottom: var(--line-thin);
  text-decoration: none; color: var(--black);
  transition: background .15s;
}
.mobile-menu-item:hover, .mobile-menu-item:active {
  background: var(--black); color: var(--white);
}
.mobile-menu-left {
  display: flex; align-items: baseline; gap: 1.2rem;
}
.mobile-menu-num {
  font-family: 'DM Mono', monospace; font-size: .72rem; color: var(--mid);
}
.mobile-menu-item:hover .mobile-menu-num,
.mobile-menu-item:active .mobile-menu-num { color: #aaa; }
.mobile-menu-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  letter-spacing: .06em;
}
.mobile-menu-arrow {
  font-size: 1.2rem;
}

/* ── HERO ── */
#hero {
  margin-top: 64px;
  min-height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: var(--line);
}
.hero-left {
  padding: 5rem 3rem;
  border-right: var(--line);
  display: flex; flex-direction: column; justify-content: space-between;
  position: relative;
  overflow: hidden;
}
.hero-dot-grid {
  position: absolute; top: 2rem; right: 2rem;
  display: grid; grid-template-columns: repeat(8,1fr); gap: 10px;
}
.hero-dot-grid span {
  width: 6px; height: 6px;
  border-radius: 50%; background: var(--black);
  display: block;
}
.hero-tag {
  font-size: .72rem; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--mid);
}
.hero-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(5rem, 9vw, 9rem);
  line-height: .92;
  letter-spacing: .02em;
}
.hero-name em {
  font-family: 'DM Serif Display', serif;
  font-style: italic;
  color: var(--mid);
}
.hero-title {
  font-size: .88rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  padding-top: 1.5rem;
  border-top: var(--line-thin);
  max-width: 340px;
}
.hero-right {
  padding: 5rem 3rem;
  display: flex; flex-direction: column; justify-content: space-between;
}
.hero-index { display: flex; flex-direction: column; gap: 0; }
.hero-index-item {
  display: flex; align-items: baseline; gap: 1rem;
  padding: 1rem 0;
  border-bottom: var(--line-thin);
  font-size: .8rem;
  font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
}
.hero-index-item span:first-child {
  font-family: 'DM Mono', monospace;
  font-size: .72rem;
  color: var(--mid);
}
.hero-bio {
  font-family: 'DM Serif Display', serif;
  font-size: 1.25rem;
  line-height: 1.6;
  color: #333;
  max-width: 420px;
}
.hero-bio strong { color: var(--black); }
.scroll-indicator {
  font-size: .7rem; letter-spacing: .15em;
  text-transform: uppercase; color: var(--mid);
  display: flex; align-items: center; gap: .75rem;
}
.scroll-indicator::before {
  content: ''; display: block; width: 40px; height: 1px; background: var(--mid);
}

/* ── SECTION COMMONS ── */
section { border-bottom: var(--line); }
.section-header {
  display: flex; align-items: stretch;
  border-bottom: var(--line);
}
.section-number {
  font-family: 'DM Mono', monospace;
  font-size: .72rem;
  color: var(--mid);
  padding: 1.25rem 2rem;
  border-right: var(--line);
  display: flex; align-items: center;
  min-width: 80px;
}
.section-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: .05em;
  padding: .6rem 3rem;
  flex: 1;
}
.section-dots {
  display: flex; align-items: center; gap: 8px;
  padding: 0 2.5rem;
  border-left: var(--line);
}
.section-dots span {
  width: 8px; height: 8px; border-radius: 50%; background: var(--black);
}
.section-dots span:nth-child(2) { background: transparent; border: 2px solid var(--black); }

/* ── ABOUT ── */
#about .about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.about-col { padding: 4rem 3rem; }
.about-col:first-child { border-right: var(--line); }
.about-label {
  font-size: .7rem; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--mid);
  margin-bottom: 1.25rem;
}
.about-body {
  font-family: 'DM Serif Display', serif;
  font-size: 1.15rem; line-height: 1.75; color: #222;
}
.socials { display: flex; flex-direction: column; gap: 0; }
.social-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 0; border-bottom: var(--line-thin);
  text-decoration: none; color: var(--black);
  transition: background .15s;
}
.social-row:hover { background: var(--black); color: var(--white); padding-left: .5rem; margin: 0 -.5rem; padding-right: .5rem; }
.social-name {
  font-size: .85rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  width: 160px; flex-shrink: 0;
}
.social-handle {
  font-family: 'DM Mono', monospace; font-size: .78rem; color: var(--mid);
}
.social-row:hover .social-handle { color: #aaa; }
.social-arrow { font-size: 1rem; }

/* ── ACADEMICS / EDUCATION ── */
#academics .academics-body {
  display: grid; grid-template-columns: 1fr 1fr;
}
.academics-col { }
.academics-col:first-child { border-right: var(--line); }
.subsection-label {
  font-size: .7rem; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase;
  padding: 1.5rem 3rem;
  border-bottom: var(--line-thin);
  display: flex; align-items: center; gap: 1rem;
}
.subsection-label::before {
  content: ''; width: 10px; height: 10px; border-radius: 50%;
  background: var(--black); flex-shrink: 0;
}
.entry {
  padding: 2rem 3rem;
  border-bottom: var(--line-thin);
  position: relative;
}
.entry-year {
  font-family: 'DM Mono', monospace; font-size: .72rem; color: var(--mid);
  margin-bottom: .5rem;
}
.entry-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem; font-weight: 700; margin-bottom: .3rem;
}
.entry-sub {
  font-size: .85rem; color: #555;
  font-family: 'DM Serif Display', serif; font-style: italic;
}
.entry-desc {
  font-size: .83rem; color: #555; margin-top: .6rem; line-height: 1.6;
}
.entry-tag {
  display: inline-block;
  margin-top: .75rem;
  font-size: .68rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase;
  padding: .25rem .75rem;
  border: 1.5px solid var(--black);
}

/* full-width subsections */
.subsection-full { border-top: var(--line); }

/* ── PUBLICATIONS & CONFERENCES ── */
.pub-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
}
.pub-card {
  padding: 2.5rem 2.5rem;
  border-right: var(--line-thin);
  border-bottom: var(--line-thin);
  position: relative;
}
.pub-card:nth-child(3n) { border-right: none; }
.pub-number {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 3.5rem; color: #e8e8e3;
  line-height: 1; margin-bottom: .5rem;
  user-select: none;
}
.pub-type {
  font-size: .65rem; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--mid); margin-bottom: .75rem;
}
.pub-title {
  font-family: 'DM Serif Display', serif;
  font-size: 1rem; line-height: 1.5; margin-bottom: .5rem;
}
.pub-venue {
  font-size: .78rem; color: #555; font-style: italic;
}
.pub-year {
  font-family: 'DM Mono', monospace; font-size: .72rem; color: var(--mid);
  margin-top: .75rem;
}

/* ── PROJECTS ── */
.project-list { }
.project-row {
  display: grid; grid-template-columns: 80px 1fr 140px 32px;
  align-items: center;
  padding: 1.75rem 3rem;
  border-bottom: var(--line-thin);
  gap: 2rem;
  transition: background .15s;
  text-decoration: none;
  color: var(--black);
  cursor: pointer;
}
.project-row:hover { background: var(--black); color: var(--white); }
.project-row:hover .project-tech { color: #aaa; }
.project-row:hover .project-num { color: #aaa; }
.project-row:hover .project-sub { color: #bbb; }
.project-num {
  font-family: 'DM Mono', monospace; font-size: .72rem; color: var(--mid);
}
.project-main {
  display: flex; flex-direction: column; gap: .3rem;
}
.project-name {
  font-size: 1rem; font-weight: 700; letter-spacing: .03em;
}
.project-sub {
  font-size: .8rem; line-height: 1.5; color: #555;
}
.project-tech {
  font-family: 'DM Mono', monospace; font-size: .72rem; color: var(--mid);
  text-align: right;
}
.project-link {
  font-size: 1rem; text-align: right; opacity: 0;
  transition: opacity .15s;
}
.project-row:hover .project-link { opacity: 1; }

/* ── FOOTER ── */
footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 2rem 3rem;
  border-top: var(--line);
}
.footer-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.4rem; letter-spacing: .06em;
}
.footer-copy {
  font-family: 'DM Mono', monospace; font-size: .72rem; color: var(--mid);
}
.footer-dots { display: flex; gap: 6px; }
.footer-dots span {
  width: 6px; height: 6px; border-radius: 50%; background: var(--black);
}

/* ── DECORATIVE LINES ── */
.deco-line {
  width: 100%; height: 2px; background: var(--black); display: block;
}
.deco-line-h { display: flex; align-items: center; gap: 1rem; }

/* ── FADE IN ── */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible { opacity: 1; transform: none; }

/* ── WORK EXPERIENCE ── */
#experience .exp-list { }
.exp-row {
  display: grid;
  grid-template-columns: 220px 1fr 200px;
  border-bottom: var(--line-thin);
  min-height: 0;
}
.exp-meta {
  padding: 2.5rem 3rem;
  border-right: var(--line-thin);
  display: flex; flex-direction: column; justify-content: flex-start; gap: .4rem;
}
.exp-date {
  font-family: 'DM Mono', monospace; font-size: .72rem; color: var(--mid);
}
.exp-type {
  font-size: .68rem; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase;
  display: inline-block;
  padding: .2rem .6rem;
  border: 1.5px solid var(--black);
  margin-top: .35rem;
  width: fit-content;
}
.exp-body {
  padding: 2.5rem 3rem;
  border-right: var(--line-thin);
}
.exp-role {
  font-size: 1.05rem; font-weight: 700; margin-bottom: .2rem;
}
.exp-company {
  font-family: 'DM Serif Display', serif; font-style: italic;
  font-size: .95rem; color: #555; margin-bottom: .75rem;
}
.exp-desc {
  font-size: .83rem; line-height: 1.65; color: #444;
}
.exp-highlights {
  margin-top: .75rem;
  display: flex; flex-direction: column; gap: .3rem;
}
.exp-highlight {
  font-size: .78rem; color: #444;
  display: flex; align-items: flex-start; gap: .6rem; line-height: 1.5;
}
.exp-highlight::before {
  content: '—'; color: var(--mid); flex-shrink: 0; margin-top: .05rem;
}
.exp-side {
  padding: 2.5rem 2rem;
  display: flex; flex-direction: column; gap: .6rem;
}
.exp-tag-list { display: flex; flex-wrap: wrap; gap: .4rem; align-content: flex-start; }
.exp-skill-tag {
  font-family: 'DM Mono', monospace;
  font-size: .65rem; letter-spacing: .06em;
  padding: .2rem .55rem;
  background: var(--black); color: var(--white);
}

/* ── SKILLS ── */
#skills .skills-body {
  display: grid; grid-template-columns: 1fr 1fr;
}
.skills-col { }
.skills-col:first-child { border-right: var(--line); }
.skill-category {
  border-bottom: var(--line-thin);
}
.skill-cat-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.5rem 3rem;
  border-bottom: var(--line-thin);
}
.skill-cat-name {
  font-size: .72rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase;
}
.skill-cat-count {
  font-family: 'DM Mono', monospace; font-size: .7rem; color: var(--mid);
}
.skill-items { padding: 1.5rem 3rem; display: flex; flex-direction: column; gap: 1rem; }
.skill-item { }
.skill-item-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: .45rem;
}
.skill-name {
  font-size: .85rem; font-weight: 700; letter-spacing: .04em;
}
.skill-level {
  font-family: 'DM Mono', monospace; font-size: .68rem; color: var(--mid);
  letter-spacing: .08em; text-transform: uppercase;
}
.skill-bar {
  width: 100%; height: 3px; background: #ddd;
  position: relative; overflow: hidden;
}
.skill-bar-fill {
  position: absolute; top: 0; left: 0; height: 100%;
  background: var(--black);
  transform: scaleX(0); transform-origin: left;
  transition: transform .8s cubic-bezier(.16,1,.3,1);
}
.visible .skill-bar-fill { transform: scaleX(1); }

/* dot-matrix skill display for tools/other */
.skill-dots-grid {
  padding: 1.5rem 3rem 2rem;
  display: flex; flex-wrap: wrap; gap: .5rem;
}
.skill-dot-item {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem 1rem;
  border: var(--line-thin);
  font-size: .75rem; font-weight: 600; letter-spacing: .06em;
  transition: background .15s, color .15s;
  cursor: default;
}
.skill-dot-item:hover { background: var(--black); color: var(--white); }
.skill-dot-item::before {
  content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; flex-shrink: 0;
}

/* ── REMOVE BOTTOM BORDER FROM LAST ITEM IN EACH SECTION ── */
.social-row:last-child                    { border-bottom: none; }
.academics-col .entry:last-child          { border-bottom: none; }
.pub-grid .pub-card:nth-last-child(-n+3)  { border-bottom: none; }
.exp-row:last-child                       { border-bottom: none; }
.project-row:last-child                   { border-bottom: none; }
.skills-col .skill-category:last-child    { border-bottom: none; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {

  /* Nav */
  nav { padding: 0 1.25rem; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .mobile-menu { display: flex; }

  /* Hero */
  #hero { grid-template-columns: 1fr; }
  .hero-left {
    border-right: none;
    border-bottom: var(--line);
    min-height: calc(100vh - 64px);
    padding: 3rem 1.25rem;
  }
  .hero-name { font-size: clamp(3.5rem, 14vw, 6rem); }
  .hero-right { display: none; }

  /* Section headers */
  .section-title { padding: .6rem 1.25rem; font-size: clamp(2rem, 8vw, 3.5rem); }
  .section-number { padding: 1.25rem 1rem; min-width: 56px; }
  .section-dots { display: none; }

  /* About */
  #about .about-grid { grid-template-columns: 1fr; }
  .about-col { padding: 2.5rem 1.25rem; }
  .about-col:first-child { border-right: none; border-bottom: var(--line); }
  .social-name { width: 120px; }

  /* Academics */
  #academics .academics-body { grid-template-columns: 1fr; }
  .academics-col:first-child { border-right: none; }
  .academics-col:last-child { border-top: var(--line); }
  .subsection-label { padding: 1.25rem 1.25rem; }
  .entry { padding: 1.5rem 1.25rem; }
  .pub-grid { grid-template-columns: 1fr; }
  .pub-card { border-right: none; padding: 1.75rem 1.25rem; }
  .pub-grid .pub-card:nth-last-child(-n+3) { border-bottom: var(--line-thin); }
  .pub-grid .pub-card:last-child { border-bottom: none; }

  /* Experience */
  .exp-row { grid-template-columns: 1fr; }
  .exp-meta { border-right: none; border-bottom: var(--line-thin); padding: 1.5rem 1.25rem; }
  .exp-body { border-right: none; border-bottom: var(--line-thin); padding: 1.5rem 1.25rem; }
  .exp-side { border-bottom: var(--line-thin); padding: 1.25rem 1.25rem; }
  .exp-row:last-child .exp-side { border-bottom: none; }

  /* Skills */
  #skills .skills-body { grid-template-columns: 1fr; }
  .skills-col:first-child { border-right: none; }
  .skills-col:last-child { border-top: var(--line); }
  .skill-cat-header { padding: 1.25rem 1.25rem; }
  .skill-items { padding: 1.25rem 1.25rem; }
  .skill-dots-grid { padding: 1.25rem 1.25rem 1.5rem; }

  /* Projects */
  .project-row {
    grid-template-columns: 48px 1fr;
    padding: 1.25rem 1.25rem;
    gap: 1rem;
  }
  .project-tech, .project-link { display: none; }

  /* Footer */
  footer { padding: 1.5rem 1.25rem; }
  .footer-dots { display: none; }
}