/* ============ tokens ============ */
:root {
  --accent-h: 75;
  --accent: oklch(0.78 0.15 var(--accent-h));
  --accent-dim: oklch(0.78 0.15 var(--accent-h) / 0.18);
  --accent-line: oklch(0.78 0.15 var(--accent-h) / 0.35);

  --bg: oklch(0.155 0.008 250);
  --bg-elev: oklch(0.185 0.009 250);
  --bg-sunken: oklch(0.125 0.007 250);
  --fg: oklch(0.96 0.005 250);
  --fg-dim: oklch(0.72 0.008 250);
  --fg-mute: oklch(0.52 0.008 250);
  --line: oklch(0.28 0.008 250);
  --line-soft: oklch(0.22 0.008 250);

  --font-sans: "Inter Tight", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-serif: "Instrument Serif", "Times New Roman", serif;

  --maxw: 1240px;
  --radius: 10px;
  --radius-lg: 18px;

  --ease: cubic-bezier(.22,.61,.36,1);
}

:root[data-theme="light"] {
  --bg: oklch(0.985 0.003 90);
  --bg-elev: oklch(0.965 0.004 90);
  --bg-sunken: oklch(0.95 0.004 90);
  --fg: oklch(0.2 0.008 250);
  --fg-dim: oklch(0.4 0.008 250);
  --fg-mute: oklch(0.58 0.008 250);
  --line: oklch(0.84 0.006 250);
  --line-soft: oklch(0.92 0.004 250);
  --accent-dim: oklch(0.78 0.15 var(--accent-h) / 0.22);
  --accent-line: oklch(0.55 0.15 var(--accent-h) / 0.55);
}

/* font-pair variants */
:root[data-fontpair="serif-mono"] {
  --font-sans: "Instrument Serif", "Times New Roman", serif;
}
:root[data-fontpair="mono-only"] {
  --font-sans: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--accent); color: oklch(0.15 0.01 250); }

/* grain overlay */
body[data-grain="true"]::before {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 100;
  opacity: 0.035;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 1 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
}

/* ============ layout ============ */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 700px) {
  .container { padding: 0 20px; }
}

.section {
  padding: 120px 0 40px;
  position: relative;
}
@media (max-width: 700px) { .section { padding: 80px 0 20px; } }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 24px;
  border-top: 1px solid var(--line-soft);
  padding-top: 28px;
  margin-bottom: 48px;
}
.section-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.05em;
  font-weight: 500;
}
.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1;
}
.section-sub {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-mute);
}

/* ============ nav ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav[data-scrolled="true"] {
  border-bottom-color: var(--line-soft);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.nav-dot {
  width: 8px; height: 8px; border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 var(--accent-dim); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.nav-links {
  display: flex; gap: 4px;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
}
.nav-link {
  padding: 8px 12px;
  color: var(--fg-dim);
  border-radius: 6px;
  transition: color .2s, background .2s;
}
.nav-link:hover { color: var(--fg); background: var(--bg-elev); }
.nav-link[data-active="true"] { color: var(--accent); }
.nav-link .n { opacity: 0.5; margin-right: 6px; }

.theme-toggle {
  margin-left: 8px;
  width: 34px; height: 34px;
  border-radius: 999px;
  border: 1px solid var(--line);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--fg-dim);
  transition: color .2s, border-color .2s, transform .3s var(--ease);
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent-line); transform: rotate(20deg); }

@media (max-width: 780px) {
  .nav-links { display: none; }
}

/* burger */
.nav-burger {
  display: none;
  width: 40px; height: 40px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--fg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-left: 4px;
  transition: color .2s, border-color .2s;
}
.nav-burger span {
  display: block;
  width: 16px; height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .2s;
}
.nav[data-open="true"] .nav-burger span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav[data-open="true"] .nav-burger span:nth-child(2) { opacity: 0; }
.nav[data-open="true"] .nav-burger span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-drawer {
  position: fixed;
  top: 60px; left: 0; right: 0;
  background: color-mix(in oklab, var(--bg) 96%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  padding: 12px 20px 20px;
  gap: 2px;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease), transform .25s var(--ease);
  max-height: calc(100vh - 60px);
  overflow-y: auto;
}
.nav[data-open="true"] .nav-drawer {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.nav-drawer-link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 12px;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--fg);
  border-radius: 8px;
  border-top: 1px solid var(--line-soft);
  transition: background .2s, color .2s;
}
.nav-drawer-link:first-child { border-top: 0; }
.nav-drawer-link .n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  letter-spacing: 0.08em;
  min-width: 24px;
}
.nav-drawer-link[data-active="true"] { color: var(--accent); }
.nav-drawer-link[data-active="true"] .n { color: var(--accent); }

@media (max-width: 780px) {
  .nav-burger { display: inline-flex; }
  .nav-inner { padding: 14px 20px; gap: 10px; }
  .nav-brand { font-size: 14px; }
}
@media (min-width: 781px) {
  .nav-drawer { display: none; }
}

/* ============ hero ============ */
.hero {
  padding: 160px 0 140px;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: end;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 130px 0 80px; }
}

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  margin-bottom: 28px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elev);
}
.hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--accent);
}

.hero-title {
  font-size: clamp(48px, 8vw, 104px);
  font-weight: 500;
  line-height: 0.96;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
}
.hero-title .serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.01em;
}
:root[data-serif="false"] .hero-title .serif {
  font-family: var(--font-sans);
  font-style: normal;
  color: var(--accent);
}

.hero-lede {
  font-size: clamp(16px, 1.3vw, 19px);
  color: var(--fg-dim);
  max-width: 56ch;
  line-height: 1.55;
  margin: 0 0 36px;
}
.hero-lede strong { color: var(--fg); font-weight: 500; }

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

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 14px;
  font-weight: 500;
  transition: all .2s var(--ease);
  background: var(--bg-elev);
}
.btn:hover {
  border-color: var(--fg);
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--accent);
  color: oklch(0.18 0.01 250);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: oklch(from var(--accent) calc(l + 0.04) c h);
  border-color: transparent;
  color: oklch(0.14 0.01 250);
}
.btn svg { width: 14px; height: 14px; }

.social-icons {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-left: 4px;
}
.icon-btn {
  width: 42px; height: 42px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--fg-dim);
  transition: color .2s, border-color .2s, transform .2s var(--ease);
}
.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent-line);
  transform: translateY(-1px);
}

/* hero aside */
.hero-aside {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--fg-dim);
}
.hero-aside-block {
  padding: 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-elev);
}
.hero-aside-block + .hero-aside-block { margin-top: 12px; }
.hero-aside-label {
  display: block;
  color: var(--fg-mute);
  margin-bottom: 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.hero-aside-value { color: var(--fg); }

.now-ping {
  display: inline-block;
  width: 6px; height: 6px; border-radius: 999px;
  background: oklch(0.75 0.18 145);
  margin-right: 6px;
  animation: pulse-green 2s ease-out infinite;
}
@keyframes pulse-green {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

/* marquee of topics */
.topics {
  margin-top: 80px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
  padding: 14px 0;
  display: flex;
  gap: 40px;
  white-space: nowrap;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.topics-track {
  display: inline-flex; gap: 40px;
  animation: scroll 50s linear infinite;
  padding-right: 40px;
}
.topics-item {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-dim);
  display: inline-flex; align-items: center; gap: 40px;
}
.topics-item::after {
  content: "◆";
  color: var(--accent);
  font-size: 8px;
}
@keyframes scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============ about ============ */
.about {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 72px;
  align-items: start;
}
@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; gap: 40px; }
}
.about-photo {
  position: sticky;
  top: 100px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  aspect-ratio: 4 / 5;
  position: relative;
}
.about-photo {
  position: sticky;
  top: 100px;
}
.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(0.15) contrast(1.02);
  transition: filter .4s var(--ease), transform .6s var(--ease);
}
.about-photo:hover img {
  filter: grayscale(0) contrast(1);
  transform: scale(1.02);
}
.about-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, oklch(0.12 0.01 250 / 0.7));
  pointer-events: none;
}
.about-photo-meta {
  position: absolute;
  left: 16px; bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg);
  z-index: 1;
  display: flex; align-items: center; gap: 8px;
  text-shadow: 0 1px 4px rgba(0,0,0,.6);
}

.prose {
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.7;
  color: var(--fg-dim);
}
.prose p { margin: 0 0 22px; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--fg); font-weight: 500; }
.prose a {
  color: var(--fg);
  border-bottom: 1px solid var(--accent-line);
  transition: border-color .2s;
}
.prose a:hover { border-bottom-color: var(--accent); }
.prose blockquote {
  margin: 32px 0;
  padding: 4px 0 4px 24px;
  border-left: 2px solid var(--accent);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 22px;
  line-height: 1.4;
  color: var(--fg);
}

/* ============ research ============ */
.research-list {
  display: flex; flex-direction: column;
}
.pub {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--line-soft);
  align-items: start;
  transition: background .3s var(--ease);
  position: relative;
}
.pub:last-child { border-bottom: 1px solid var(--line-soft); }
.pub::before {
  content: "";
  position: absolute;
  left: -16px; right: -16px;
  top: 0; bottom: -1px;
  border-radius: 8px;
  background: transparent;
  transition: background .25s var(--ease);
  z-index: -1;
}
.pub:hover::before { background: var(--bg-elev); }
.pub-year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-mute);
  padding-top: 4px;
}
.pub-title {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--fg);
}
.pub-title a { transition: color .2s; }
.pub-title a:hover { color: var(--accent); }
.pub-title a::after {
  content: " ↗";
  color: var(--fg-mute);
  font-size: 0.85em;
  opacity: 0;
  transition: opacity .2s;
}
.pub-title a:hover::after { opacity: 1; }
.pub-venue {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-mute);
  display: block;
}
.pub-tags {
  display: flex; gap: 6px;
  padding-top: 6px;
}
.pub-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  color: var(--fg-dim);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
@media (max-width: 700px) {
  .pub { grid-template-columns: 1fr; gap: 8px; }
  .pub-tags { padding-top: 0; }
}

/* ============ projects ============ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 780px) { .projects-grid { grid-template-columns: 1fr; } }

.project {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
  background: var(--bg-elev);
  position: relative;
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
  display: flex; flex-direction: column;
  min-height: 280px;
}
.project:hover {
  border-color: var(--accent-line);
  transform: translateY(-2px);
}
.project::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(circle 200px at var(--mx,50%) var(--my,50%), var(--accent-dim), transparent 60%);
  opacity: 0;
  transition: opacity .3s;
}
.project:hover::after { opacity: 1; }

.project-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  z-index: 1;
}
.project-status {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent);
}
.project-title {
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  position: relative;
  z-index: 1;
}
.project-desc {
  color: var(--fg-dim);
  font-size: 14.5px;
  line-height: 1.55;
  margin: 0 0 20px;
  position: relative;
  z-index: 1;
}
.project-stack {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-top: auto;
  position: relative;
  z-index: 1;
}
.stack-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  padding: 4px 9px;
  border-radius: 4px;
  background: var(--bg-sunken);
  color: var(--fg-dim);
  border: 1px solid var(--line-soft);
}

/* ============ writing ============ */
.writing-list {
  display: flex; flex-direction: column;
}
.note {
  display: grid;
  grid-template-columns: 90px 1fr 80px;
  gap: 24px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
  align-items: center;
  transition: padding-left .25s var(--ease);
}
.note:last-child { border-bottom: 1px solid var(--line-soft); }
.note:hover { padding-left: 12px; }
.note-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-mute);
}
.note-title {
  font-size: 16.5px;
  font-weight: 450;
  color: var(--fg);
  letter-spacing: -0.005em;
  transition: color .2s;
}
.note:hover .note-title { color: var(--accent); }
.note-read {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-align: right;
}
@media (max-width: 700px) {
  .note { grid-template-columns: 70px 1fr; }
  .note-read { display: none; }
}

/* ============ currently ============ */
.currently {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: 36px;
  background:
    radial-gradient(circle at 80% 0%, var(--accent-dim), transparent 40%),
    var(--bg-elev);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
@media (max-width: 780px) { .currently { grid-template-columns: 1fr; padding: 24px; } }
.currently-col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 14px;
  display: flex; align-items: center; gap: 8px;
}
.currently-col ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 12px;
}
.currently-col li {
  font-size: 15px;
  color: var(--fg);
  display: flex; align-items: baseline; gap: 10px;
  line-height: 1.4;
}
.currently-col li::before {
  content: "›";
  color: var(--accent);
  font-family: var(--font-mono);
}

/* ============ ask ============ */
.ask {
  margin-top: 40px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: 32px;
  background: var(--bg-elev);
  position: relative;
  overflow: hidden;
}
.ask::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 90% 120%, var(--accent-dim), transparent 50%);
  pointer-events: none;
}
.ask-head {
  position: relative;
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  margin-bottom: 18px;
}
.ask-title {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin: 0;
}
.ask-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.ask-form {
  position: relative;
  display: flex; gap: 8px;
  padding: 4px;
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color .2s;
}
.ask-form:focus-within { border-color: var(--accent-line); }
.ask-input {
  flex: 1;
  border: 0; background: transparent;
  padding: 12px 18px;
  font: inherit; color: var(--fg);
  outline: 0;
  font-size: 15px;
}
.ask-input::placeholder { color: var(--fg-mute); }
.ask-send {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: oklch(0.18 0.01 250);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 8px;
  transition: filter .2s, transform .2s;
}
.ask-send:hover { filter: brightness(1.08); }
.ask-send:active { transform: scale(0.98); }
.ask-send:disabled { opacity: 0.5; cursor: not-allowed; }

.ask-suggest {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-top: 14px;
  position: relative;
}
.ask-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--fg-dim);
  background: var(--bg-sunken);
  transition: all .2s;
}
.ask-chip:hover { color: var(--accent); border-color: var(--accent-line); }

.ask-answer {
  position: relative;
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: 12px;
  border: 1px solid var(--line-soft);
  background: var(--bg-sunken);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--fg);
  white-space: pre-wrap;
}
.ask-answer .label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.ask-caret {
  display: inline-block;
  width: 8px; height: 1em;
  background: var(--accent);
  vertical-align: -2px;
  animation: blink 1s steps(2) infinite;
  margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

/* ============ contact ============ */
.contact {
  padding: 100px 0 40px;
}
.contact-title {
  font-size: clamp(44px, 7vw, 92px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1;
  margin: 0 0 40px;
}
.contact-title .serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
:root[data-serif="false"] .contact-title .serif {
  font-family: var(--font-sans); font-style: normal;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
@media (max-width: 700px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-cell {
  background: var(--bg);
  padding: 22px 24px;
  display: flex; justify-content: space-between; align-items: center;
  transition: background .2s;
}
.contact-cell:hover { background: var(--bg-elev); }
.contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.contact-value {
  font-size: 15px;
  display: flex; align-items: center; gap: 8px;
}
.contact-value::after {
  content: "↗";
  color: var(--fg-mute);
  transition: transform .2s, color .2s;
}
.contact-cell:hover .contact-value::after { transform: translate(2px, -2px); color: var(--accent); }

/* ============ footer ============ */
.footer {
  border-top: 1px solid var(--line-soft);
  margin-top: 80px;
  padding: 28px 0 40px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}

/* ============ final footer ============ */
.footer-final {
  border-top: 1px solid var(--line-soft);
  margin-top: 120px;
  padding: 80px 0 40px;
  position: relative;
  overflow: hidden;
}
.footer-final::before {
  content: "";
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 80%; height: 300px;
  background: radial-gradient(ellipse at top, var(--accent-dim), transparent 60%);
  pointer-events: none;
  opacity: 0.5;
}
.footer-big {
  font-size: clamp(56px, 12vw, 180px);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.04em;
  display: flex; gap: 20px; align-items: baseline; flex-wrap: wrap;
  margin-bottom: 60px;
  position: relative;
}
.footer-big .serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
:root[data-serif="false"] .footer-big .serif {
  font-family: var(--font-sans); font-style: normal;
}
.footer-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding: 32px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}
@media (max-width: 700px) { .footer-row { grid-template-columns: 1fr; gap: 24px; } }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.footer-link {
  font-size: 17px;
  color: var(--fg);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  align-self: flex-start;
  transition: border-color .2s, color .2s;
}
.footer-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  margin-top: 20px;
  flex-wrap: wrap; gap: 10px;
}

/* ============ resume ============ */
.resume-top {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 32px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.resume-intro {
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg-dim);
  margin: 0;
}
.resume-block {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line-soft);
}
.resume-h {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 24px;
}
.resume-list { display: flex; flex-direction: column; gap: 28px; }
.resume-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: start;
}
.resume-col-dates {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-mute);
  padding-top: 2px;
}
.resume-row-title {
  font-size: 17px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.resume-row-sub {
  font-size: 14px;
  color: var(--fg-dim);
  margin-top: 4px;
}
.resume-bullets {
  margin: 16px 0 0; padding: 0; list-style: none;
  display: flex; flex-direction: column; gap: 10px;
}
.resume-bullets li {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--fg-dim);
  padding-left: 20px;
  position: relative;
}
.resume-bullets li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.skills-col { display: flex; flex-direction: column; gap: 10px; }
.skills-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.skills-tags { display: flex; flex-wrap: wrap; gap: 6px; }
@media (max-width: 700px) {
  .resume-row { grid-template-columns: 1fr; gap: 8px; }
  .skills-grid { grid-template-columns: 1fr; }
}

/* final footer — slim */
.footer-final { margin-top: 80px; padding: 28px 0 40px; border-top: 1px solid var(--line-soft); }
.footer-final::before { display: none; }
.footer-bottom { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 11px; color: var(--fg-mute); flex-wrap: wrap; gap: 10px; }

/* ============ page transitions + home ============ */
.page-fade {
  animation: pageIn .4s var(--ease);
}
@keyframes pageIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.home .home-grid {
  min-height: calc(100vh - 220px);
  display: flex;
  align-items: center;
  padding-top: 40px;
}
.home .home-grid > div { max-width: 900px; }
@media (max-width: 900px) {
  .home .home-grid { min-height: auto; padding-top: 0; }
}

/* ============ mobile polish ============ */
@media (max-width: 700px) {
  .hero { padding: 110px 0 60px; }
  .hero-title { font-size: clamp(38px, 11vw, 56px); line-height: 1; }
  .hero-lede { font-size: 15.5px; }
  .hero-eyebrow { font-size: 11px; padding: 5px 10px; }
  .hero-actions { gap: 10px; }
  .btn { padding: 10px 14px; font-size: 13px; }
  .social-icons { gap: 6px; margin-left: 0; }
  .icon-btn { width: 38px; height: 38px; }

  .section { padding: 60px 0 20px; }
  .section-head { gap: 12px; margin-bottom: 32px; padding-top: 20px; flex-wrap: wrap; }
  .section-sub { display: none; }
  .section-title { font-size: 30px; }

  .about { gap: 28px; }
  .about-photo { position: static; max-width: 280px; }

  .prose { font-size: 15.5px; }
  .prose blockquote { font-size: 18px; margin: 24px 0; padding-left: 18px; }

  .project { padding: 22px; min-height: auto; }
  .project-title { font-size: 21px; }

  .note { grid-template-columns: 70px 1fr; gap: 16px; padding: 18px 0; }
  .note-title { font-size: 15px; }

  .ask { padding: 22px; }
  .ask-form { flex-direction: column; border-radius: 14px; padding: 8px; gap: 6px; }
  .ask-input { padding: 10px 14px; }
  .ask-send { width: 100%; justify-content: center; }

  .resume-top { flex-direction: column; align-items: stretch; gap: 20px; }
  .resume-intro { font-size: 15.5px; }
  .resume-block { margin-top: 32px; padding-top: 20px; }

  .topics { margin-top: 48px; }
  .topics-item { font-size: 12px; }

  .tweaks-panel { right: 12px; bottom: 12px; width: calc(100vw - 24px); max-width: 280px; }

  .footer-final { margin-top: 60px; padding: 20px 0 32px; }
  .footer-bottom { font-size: 10px; }
}

@media (max-width: 400px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 34px; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1; justify-content: center; min-width: 0; }
}

/* ============ reveal on scroll ============ */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: none;
}
.reveal[data-delay="1"] { transition-delay: .06s; }
.reveal[data-delay="2"] { transition-delay: .12s; }
.reveal[data-delay="3"] { transition-delay: .18s; }
.reveal[data-delay="4"] { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .topics-track { animation: none; }
  .nav-dot, .now-ping { animation: none; }
}

/* ============ tweaks panel ============ */
.tweaks-panel {
  position: fixed;
  right: 20px; bottom: 20px;
  z-index: 60;
  width: 280px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
  font-family: var(--font-mono);
  font-size: 12px;
}
.tweaks-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 11px;
  color: var(--fg-mute);
}
.tweaks-close {
  color: var(--fg-mute);
  padding: 2px 6px;
  border-radius: 4px;
}
.tweaks-close:hover { color: var(--fg); background: var(--bg-sunken); }
.tweak-row { margin-bottom: 14px; }
.tweak-label {
  display: block;
  color: var(--fg-dim);
  margin-bottom: 6px;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.tweak-row input[type=range] {
  width: 100%;
  accent-color: var(--accent);
}
.tweak-chips { display: flex; flex-wrap: wrap; gap: 4px; }
.tweak-chip {
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--line);
  color: var(--fg-dim);
  background: var(--bg-sunken);
  font-size: 10.5px;
  transition: all .2s;
}
.tweak-chip[data-active="true"] {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}
.tweak-chip:hover { color: var(--fg); }
.tweak-toggle {
  display: flex; justify-content: space-between; align-items: center;
  gap: 8px;
}
.tweak-switch {
  width: 32px; height: 18px;
  background: var(--line);
  border-radius: 999px;
  position: relative;
  transition: background .2s;
}
.tweak-switch::after {
  content: "";
  position: absolute;
  left: 2px; top: 2px;
  width: 14px; height: 14px;
  border-radius: 999px;
  background: var(--fg);
  transition: transform .2s;
}
.tweak-switch[data-on="true"] { background: var(--accent); }
.tweak-switch[data-on="true"]::after { transform: translateX(14px); background: oklch(0.18 0.01 250); }