/* ---------- Tokens (dark by default) ---------- */
:root {
  --bg: #000000;
  --bg-elev: #0d0f12;
  --text: #f2f3f5;
  --muted: #9aa1a9;
  --line: #22262b;
  --accent: #f5c04a;
  --accent-soft: rgba(245, 192, 74, .12);
  --glow: rgba(245, 192, 74, .45);
  --tab: #f3efe6;
  --tab-soft: rgba(243, 239, 230, .10);
  --tab-glow: rgba(243, 239, 230, .45);
  --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 10px 30px rgba(0, 0, 0, .45);
  --radius: 14px;
  --max: 1080px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f6f8fb;
  --bg-elev: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --accent: #a16207;
  --accent-soft: rgba(161, 98, 7, .10);
  --glow: rgba(161, 98, 7, .28);
  --tab: #0f172a;
  --tab-soft: rgba(15, 23, 42, .06);
  --tab-glow: rgba(15, 23, 42, .18);
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
  color-scheme: light;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding-left: 1.2em; }
.accent { color: var(--accent); }

.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--accent); color: #fff; padding: 8px 12px; border-radius: 8px;
}
.skip:focus { left: 16px; z-index: 100; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: var(--max); margin: 0 auto;
  padding: 12px max(20px, env(safe-area-inset-right)) 12px max(20px, env(safe-area-inset-left));
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; font-size: 1.15rem; color: var(--text); letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.nav-links { display: flex; align-items: center; gap: 4px; position: relative; }
.nav-links a {
  position: relative; z-index: 1;
  color: var(--muted); font-weight: 500; font-size: .95rem;
  padding: 8px 12px; border-radius: 999px; transition: color .3s ease, text-shadow .3s ease;
}
.nav-links a:hover { color: var(--tab); text-decoration: none; text-shadow: 0 0 12px var(--tab-glow); }
.nav-links a.active { color: var(--tab); text-shadow: 0 0 14px var(--tab-glow); }
/* The glowing pill that slides behind the active tab */
.nav-indicator {
  position: absolute; top: 0; left: 0; height: 100%; width: 0;
  border-radius: 999px; background: var(--tab-soft);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--tab) 40%, transparent), 0 0 18px 2px var(--tab-glow);
  opacity: 0; pointer-events: none;
  transition: left .45s cubic-bezier(.22, 1, .36, 1), width .45s cubic-bezier(.22, 1, .36, 1), opacity .3s ease;
}
.nav-indicator.on { opacity: 1; }
.nav-links .nav-resume-mobile { display: none; }
.theme-toggle, .menu-toggle {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg-elev);
  color: var(--text); cursor: pointer; padding: 0;
}
.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* Hamburger (hidden on wide screens) */
.menu-toggle { display: none; flex-direction: column; gap: 4px; }
.menu-toggle .bar { display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.menu-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 10px 16px; border-radius: 10px; font-weight: 600; font-size: .95rem;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--text);
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #0a0a0a; }
:root[data-theme="light"] .btn-primary { color: #fff; }
.btn-ghost { background: transparent; }

/* ---------- Layout ---------- */
main { max-width: var(--max); margin: 0 auto; padding: 0 max(20px, env(safe-area-inset-right)) 0 max(20px, env(safe-area-inset-left)); }
.section { padding: 72px 0 8px; scroll-margin-top: 72px; }
.section h2 {
  font-size: 1.6rem; display: flex; align-items: baseline; gap: 12px; margin-bottom: 24px;
}
.section h2 .num { font-family: var(--mono); font-size: .85rem; color: var(--accent); font-weight: 500; }

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 24px;
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr);
  gap: 48px; align-items: center;
}
.hero-text { min-width: 0; }
.hero-photo {
  margin: 0; justify-self: end; width: 100%; max-width: 380px;
  aspect-ratio: 4 / 5; border-radius: 22px; overflow: hidden; position: relative;
  border: 1px solid var(--line); box-shadow: var(--shadow);
}
.hero-photo::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06);
  background: linear-gradient(180deg, transparent 70%, rgba(0, 0, 0, .6));
}
.hero-photo img {
  width: 100%; height: 100%; object-fit: cover; object-position: 50% 30%; display: block;
  /* Resting state: muted and slightly dim; hover restores the original */
  filter: grayscale(.55) brightness(.72) contrast(.95);
  transform: scale(1.02);
  transition: filter .6s ease, transform .6s ease;
}
.hero-photo::after { transition: opacity .6s ease; }
.hero-photo:hover img, .hero-photo:focus-within img {
  filter: none; transform: scale(1);
}
.hero-photo:hover::after { opacity: 0; }
@media (hover: none) {
  /* Touch screens have no hover, so show the photo at full quality */
  .hero-photo img { filter: none; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-photo img, .hero-photo::after { transition: none; }
}
.eyebrow {
  font-family: var(--mono); font-size: .85rem; color: var(--accent);
  margin-bottom: 18px; letter-spacing: .02em;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.3rem); font-weight: 800; letter-spacing: -.03em; }
.lede { font-size: 1.1rem; color: var(--muted); max-width: 680px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 36px; }
.hero-stats {
  list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 28px;
  border-top: 1px solid var(--line); padding-top: 24px;
}
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 1.5rem; font-weight: 800; letter-spacing: -.02em; }
.hero-stats span { color: var(--muted); font-size: .9rem; }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.card h3 { font-size: 1.05rem; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 28px; align-items: start; }
.prose p { color: var(--muted); font-size: 1.02rem; }
.facts dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; font-size: .93rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; font-weight: 500; }

/* ---------- Timeline ---------- */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline > li {
  display: grid; grid-template-columns: 170px 1fr; gap: 20px;
  padding: 24px 0; border-top: 1px solid var(--line);
}
.timeline > li:last-child { border-bottom: 1px solid var(--line); }
.when { font-family: var(--mono); font-size: .85rem; color: var(--muted); padding-top: 4px; }
.what h3 { font-size: 1.1rem; }
.what .org { color: var(--muted); font-weight: 500; }
.what ul { color: var(--muted); }
.what li { margin-bottom: 6px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 0; }
.tags span {
  font-family: var(--mono); font-size: .75rem; padding: 3px 9px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); border: 1px solid transparent;
}

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.project.featured { grid-column: 1 / -1; border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.project-head { margin-bottom: 10px; }
.project-head h3 { font-size: 1.3rem; margin: 6px 0 2px; }
.project .sub { color: var(--muted); margin: 0; font-size: .95rem; }
.project > p { color: var(--muted); }
.badge {
  display: inline-block; font-family: var(--mono); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .08em; color: var(--accent); background: var(--accent-soft);
  padding: 3px 8px; border-radius: 6px;
}
.checks { list-style: none; padding: 0; margin: 0 0 6px; color: var(--muted); }
.checks li { padding-left: 22px; position: relative; margin-bottom: 4px; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 9px; width: 12px; height: 7px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}


/* ---------- GitHub repos ---------- */
.repos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.repo { display: block; color: var(--text); }
.repo:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.repo-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; color: var(--accent); }
.repo-head h3 { margin: 0; font-family: var(--mono); font-size: 1rem; font-weight: 600; color: var(--text); }
.repo > p { color: var(--muted); font-size: .95rem; }

/* ---------- Skills (looping marquees) ---------- */
.skills-marquee { display: flex; flex-direction: column; gap: 12px; }
.marquee-row {
  display: grid; grid-template-columns: 150px 1fr; align-items: center; gap: 14px;
  padding: 10px 0; border-top: 1px solid var(--line);
}
.marquee-row:last-child { border-bottom: 1px solid var(--line); }
.marquee-label { font-family: var(--mono); font-size: .8rem; color: var(--accent); letter-spacing: .02em; }
.marquee-viewport {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex; gap: 10px; width: max-content;
  animation: marquee-left var(--dur, 40s) linear infinite;
  will-change: transform;
}
.marquee-row[data-dir="right"] .marquee-track { animation-name: marquee-right; }
.marquee-viewport:hover .marquee-track { animation-play-state: paused; }
.chip {
  flex: 0 0 auto; font-family: var(--mono); font-size: .8rem; white-space: nowrap;
  padding: 7px 12px; border-radius: 999px;
  background: var(--bg-elev); border: 1px solid var(--line); color: var(--text);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.chip:hover { border-color: var(--accent); box-shadow: 0 0 12px 0 var(--glow); }
@keyframes marquee-left  { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes marquee-right { from { transform: translateX(-50%); } to { transform: translateX(0); } }
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; flex-wrap: wrap; width: auto; }
  .marquee-track .dup { display: none; }
  .marquee-viewport { -webkit-mask-image: none; mask-image: none; }
}

/* ---------- Contact ---------- */
.contact { padding-bottom: 40px; }
.contact-links { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--max); margin: 40px auto 0; padding: 20px;
  border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity .55s ease, transform .55s ease;
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
/* Tablet */
@media (max-width: 1024px) {
  .repos { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1.4fr 1fr; }
}
/* Small tablet and phone: collapse nav into a menu */
@media (max-width: 860px) {
  .about-grid, .projects { grid-template-columns: 1fr; }
  .hero { grid-template-columns: 1fr; gap: 28px; }
  .hero-photo { justify-self: center; max-width: 320px; order: -1; }
  .timeline > li { grid-template-columns: 1fr; gap: 6px; }
  .nav-resume { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 10px max(20px, env(safe-area-inset-right)) 16px max(20px, env(safe-area-inset-left));
    background: var(--bg-elev); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .18s ease, transform .18s ease;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 12px 14px; font-size: 1.05rem; border-radius: 10px; }
  .nav-links a.active { background: var(--tab-soft); box-shadow: 0 0 16px 0 var(--tab-glow); }
  .nav-indicator { display: none; }
  .nav-links .nav-resume-mobile { display: inline-flex; margin-top: 8px; justify-content: center; }
}
/* Phone */
@media (max-width: 600px) {
  .repos { grid-template-columns: 1fr; }
  .marquee-row { grid-template-columns: 1fr; gap: 6px; }
  .hero { padding-top: 32px; }
  .hero-photo { max-width: 260px; }
  .section { padding-top: 56px; }
  .hero-stats { gap: 18px 28px; }
  .hero-actions .btn, .contact-links .btn { flex: 1 1 auto; justify-content: center; }
  .card { padding: 18px; }
  .footer { flex-direction: column; text-align: center; }
}
@media (max-width: 380px) {
  .hero h1 { font-size: 1.85rem; }
  .brand { font-size: 1.05rem; }
}