:root {
  --ink: #17251d;
  --forest: #11251b;
  --green: #356b44;
  --lime: #c6df77;
  --paper: #f2f0e7;
  --cream: #e4e2d5;
  --orange: #f06f42;
  --line: rgba(23, 37, 29, 0.2);
  --sans: "Noto Sans SC", system-ui, sans-serif;
  --serif: "Noto Serif SC", serif;
  --mono: "DM Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; top: 1rem; left: 1rem; padding: .7rem 1rem; background: var(--lime); transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: absolute; z-index: 20; top: 0; display: flex; width: 100%; align-items: center; justify-content: space-between; padding: 2rem 4vw; color: #f8f7f0; }
.brand { display: flex; gap: .8rem; align-items: center; font: 500 .72rem/1 var(--mono); letter-spacing: .08em; }
.brand-mark { width: 13px; height: 13px; border: 1px solid var(--lime); border-radius: 50%; box-shadow: inset 5px 0 0 var(--lime); }
.site-nav { display: flex; gap: 2rem; font: 400 .72rem/1 var(--mono); letter-spacing: .06em; }
.site-nav a { opacity: .72; transition: .25s; }
.site-nav a:hover, .site-nav a.active { color: var(--lime); opacity: 1; }
.menu-button { display: none; color: inherit; background: none; border: 0; }

.hero { position: relative; min-height: 780px; height: 100svh; overflow: hidden; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; padding: 8rem 7vw 5rem; color: white; background: var(--forest); }
.hero-grid { position: absolute; inset: 0; opacity: .09; background-image: linear-gradient(rgba(255,255,255,.5) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.5) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(to right, black, transparent 65%); }
.orbit { position: absolute; border: 1px solid rgba(198, 223, 119, .17); border-radius: 50%; pointer-events: none; }
.orbit::after { content: ""; position: absolute; width: 7px; height: 7px; background: var(--lime); border-radius: 50%; top: 18%; right: 14%; box-shadow: 0 0 16px var(--lime); }
.orbit-one { width: 44vw; height: 44vw; left: -20vw; bottom: -25vw; }
.orbit-two { width: 58vw; height: 58vw; right: -23vw; top: -28vw; }
.hero-copy { position: relative; z-index: 2; max-width: 680px; }
.eyebrow { font: 400 .68rem/1.4 var(--mono); letter-spacing: .16em; }
.pulse { display: inline-block; width: 7px; height: 7px; margin-right: .65rem; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 6px rgba(198,223,119,.1); animation: pulse 2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 10px transparent; } }
.hero h1 { margin: 2rem 0; font: 600 clamp(3.4rem, 6.5vw, 7.4rem)/1.15 var(--serif); letter-spacing: -.06em; }
.hero h1 span { color: var(--lime); }
.hero-intro { max-width: 580px; font-size: clamp(.96rem, 1.25vw, 1.15rem); font-weight: 300; line-height: 2; color: rgba(255,255,255,.68); }
.hero-intro strong { color: white; font-weight: 500; }
.translation { display: block; margin-top: .55rem; font: 300 .78em/1.75 var(--sans); color: rgba(255,255,255,.45); letter-spacing: .01em; }
.dark-text { color: rgba(23,37,29,.48); }
.heading-en { display: block; margin-top: .65rem; font: 400 .24em/1.35 var(--mono); letter-spacing: .04em; color: var(--green); }
.light-text { color: rgba(255,255,255,.48); }
.hero-actions { display: flex; align-items: center; gap: 2.2rem; margin-top: 2.5rem; }
.button { display: inline-flex; gap: 2.5rem; align-items: center; padding: 1rem 1.25rem; font-size: .82rem; transition: .25s; }
.button-primary { color: var(--forest); background: var(--lime); }
.button-primary:hover { transform: translateY(-3px); background: white; }
.text-link { font-size: .82rem; border-bottom: 1px solid rgba(255,255,255,.35); padding-bottom: .4rem; }

.earth-card { position: relative; z-index: 1; justify-self: end; width: min(39vw, 620px); aspect-ratio: 1 / 1.05; overflow: hidden; border: 1px solid rgba(255,255,255,.24); border-radius: 50% 50% 2px 2px; background: #1e3f2d; box-shadow: 0 35px 90px rgba(0,0,0,.28); }
.card-meta { position: absolute; z-index: 2; top: 7%; left: 9%; right: 9%; display: flex; justify-content: space-between; font: .58rem var(--mono); letter-spacing: .1em; }
.landscape { width: 100%; height: 100%; }
.scan-line { fill: none; stroke: var(--orange); stroke-width: 2; stroke-dasharray: 8 7; }
.scan-point { fill: var(--orange); filter: drop-shadow(0 0 7px var(--orange)); }
.coordinates { position: absolute; bottom: 8%; left: 9%; font: .62rem/1.7 var(--mono); letter-spacing: .08em; }
.signal { position: absolute; right: 9%; bottom: 9%; display: flex; gap: 3px; align-items: end; height: 25px; }
.signal i { display: block; width: 2px; background: var(--lime); }
.signal i:nth-child(1), .signal i:nth-child(7) { height: 25%; } .signal i:nth-child(2), .signal i:nth-child(6) { height: 55%; } .signal i:nth-child(3), .signal i:nth-child(5) { height: 80%; } .signal i:nth-child(4) { height: 100%; }
.scroll-note { position: absolute; left: 4vw; bottom: 3rem; display: flex; gap: 1rem; align-items: center; writing-mode: vertical-rl; font: .55rem var(--mono); letter-spacing: .13em; color: rgba(255,255,255,.48); }
.scroll-note i { display: block; width: 1px; height: 45px; background: var(--lime); }

.section { padding: 8rem 8vw; }
.section-label { display: flex; align-items: center; gap: .8rem; font: 500 .66rem var(--mono); letter-spacing: .14em; }
.section-label span { color: var(--orange); }
.section-label::after { content: ""; width: 42px; height: 1px; background: currentColor; opacity: .35; }
.about { display: grid; grid-template-columns: .5fr 1.6fr; gap: 6vw; min-height: 850px; align-items: start; }
.about-content { max-width: 880px; }
.lead { margin: 0 0 1.5rem; font-size: .9rem; color: var(--green); }
.about h2, .projects h2 { margin: 0; font: 600 clamp(2.6rem, 5vw, 5.5rem)/1.35 var(--serif); letter-spacing: -.045em; }
.about-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 4vw; margin-top: 4rem; padding-top: 2rem; border-top: 1px solid var(--line); color: rgba(23,37,29,.7); font-size: .92rem; line-height: 1.9; }
.education { margin-top: 4rem; border-top: 1px solid var(--line); }
.education > .tag { margin: 0; padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.education-row { display: grid; grid-template-columns: 130px 1fr; gap: 1rem; padding: 1.6rem 0; border-bottom: 1px solid var(--line); }
.education-row time { font: .68rem var(--mono); color: var(--green); }
.education-row h3 { margin: 0 0 .45rem; font: 500 1.05rem var(--serif); }
.education-row p { margin: 0; color: rgba(23,37,29,.58); font-size: .78rem; line-height: 1.7; }
.education-row p span { color: rgba(23,37,29,.38); }
.education-row.current time::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: .55rem; border-radius: 50%; background: var(--orange); }
.profile-portrait { align-self: end; width: min(100%, 360px); margin: 2rem 0 0; }
.portrait-frame { position: relative; overflow: hidden; aspect-ratio: 3 / 4; background: var(--green); }
.portrait-frame::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.32); pointer-events: none; }
.portrait-frame img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(.82) contrast(1.03); transition: transform .7s ease, filter .7s ease; }
.profile-portrait:hover img { transform: scale(1.025); filter: saturate(1) contrast(1); }
.portrait-corner { position: absolute; top: 1rem; left: 1rem; padding: .45rem .6rem; color: white; background: rgba(17,37,27,.66); backdrop-filter: blur(6px); font: .55rem var(--mono); letter-spacing: .1em; }
.profile-portrait figcaption { display: flex; justify-content: space-between; gap: 1rem; margin-top: .9rem; color: rgba(23,37,29,.42); font: .55rem/1.6 var(--mono); }
.profile-portrait figcaption span { color: var(--green); font-family: var(--sans); }
.mini-stats { grid-column: 2; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.mini-stats div { display: flex; gap: 1.2rem; padding-top: 1.4rem; }
.mini-stats strong { font: 400 1.8rem var(--serif); color: var(--green); }
.mini-stats span { font: .58rem/1.5 var(--mono); letter-spacing: .08em; }

.research { color: white; background: var(--forest); }
.section-heading { display: grid; grid-template-columns: .6fr 1.4fr 1fr; gap: 3vw; align-items: end; padding-bottom: 5rem; }
.section-label.light { color: white; align-self: start; }
.section-heading h2 { margin: 0; font: 600 clamp(2.5rem, 4.4vw, 5rem)/1.25 var(--serif); color: var(--lime); }
.section-heading > p { margin: 0; color: rgba(255,255,255,.55); font-size: .85rem; line-height: 1.8; }
.research-list { border-top: 1px solid rgba(255,255,255,.18); }
.research-item { display: grid; grid-template-columns: .5fr 1.7fr .3fr; gap: 3vw; align-items: center; min-height: 220px; border-bottom: 1px solid rgba(255,255,255,.18); transition: .35s; }
.research-item:hover { padding-left: 1.25rem; background: rgba(198,223,119,.035); }
.item-number, .tag { font: .62rem var(--mono); letter-spacing: .13em; color: var(--orange); }
.research-item h3 { margin: .7rem 0; font: 500 clamp(1.45rem, 2.4vw, 2.5rem) var(--serif); }
.research-item h3 span { display: block; margin-top: .45rem; font: 300 .34em/1.4 var(--mono); letter-spacing: .03em; color: rgba(255,255,255,.4); }
.research-item p:last-child { margin: 0; color: rgba(255,255,255,.5); font-size: .82rem; }
.item-icon { justify-self: end; font: 300 4.5rem var(--serif); color: var(--lime); }
.bars { display: flex; gap: 5px; align-items: end; height: 45px; }
.bars i { width: 4px; background: var(--lime); } .bars i:nth-child(1) { height: 30%; } .bars i:nth-child(2) { height: 80%; } .bars i:nth-child(3) { height: 55%; } .bars i:nth-child(4) { height: 100%; }
.rings { width: 54px; height: 54px; border: 1px solid var(--lime); border-radius: 50%; box-shadow: inset 0 0 0 11px var(--forest), inset 0 0 0 12px var(--lime), inset 0 0 0 22px var(--forest); }

.projects { display: grid; grid-template-columns: .8fr 1.2fr; gap: 8vw; align-items: center; min-height: 900px; background: var(--cream); }
.projects-intro p:last-child { max-width: 430px; margin-top: 2rem; color: rgba(23,37,29,.62); line-height: 1.8; }
.projects-intro .section-label { margin-bottom: 2.5rem; }
.project-card { display: grid; grid-template-columns: 1fr 1fr; min-height: 530px; background: var(--paper); box-shadow: 0 30px 60px rgba(29,50,36,.12); transform: rotate(1.5deg); transition: transform .4s; }
.project-card:hover { transform: rotate(0deg) translateY(-8px); }
.project-visual { position: relative; overflow: hidden; background: var(--green); }
.project-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.1) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.1) 1px, transparent 1px); background-size: 38px 38px; }
.leaf { position: absolute; width: 180px; height: 280px; border-radius: 100% 0 100% 0; background: var(--lime); transform-origin: bottom right; box-shadow: inset -25px -20px 40px rgba(20,60,35,.18); }
.leaf::after { content: ""; position: absolute; right: 0; bottom: 0; width: 1px; height: 90%; background: rgba(17,37,27,.35); transform-origin: bottom; transform: rotate(34deg); }
.leaf-one { left: -20px; bottom: 20px; transform: rotate(-18deg) scale(.9); }
.leaf-two { right: -70px; top: 35px; transform: rotate(105deg) scale(.72); }
.leaf-three { left: 80px; bottom: -115px; transform: rotate(38deg) scale(.8); background: #8fba5c; }
.project-index { position: absolute; left: 1rem; top: 1rem; color: white; font: .62rem var(--mono); }
.project-copy { display: flex; flex-direction: column; justify-content: center; padding: 2.5rem; }
.tag.dark { color: var(--green); }
.project-copy h3 { margin: 1.2rem 0; font: 600 clamp(1.5rem, 2.5vw, 2.8rem)/1.35 var(--serif); }
.project-copy > p:not(.tag) { color: rgba(23,37,29,.58); font-size: .82rem; line-height: 1.8; }
.project-status { margin-top: 2rem; font: .62rem var(--mono); letter-spacing: .08em; }
.project-status i { display: inline-block; width: 6px; height: 6px; margin-right: .5rem; border-radius: 50%; background: var(--orange); }

.contact { text-align: center; color: white; background: var(--green); }
.contact .eyebrow { color: var(--lime); }
.contact h2 { margin: 2rem 0; font: 600 clamp(3rem, 6vw, 6.5rem)/1.25 var(--serif); letter-spacing: -.05em; }
.contact h2 em { color: var(--lime); font-style: normal; }
.contact-copy { max-width: 550px; margin: 0 auto 3rem; color: rgba(255,255,255,.65); line-height: 1.8; }
.contact-link { display: inline-flex; gap: 3rem; padding: 1rem 0; border-bottom: 1px solid rgba(255,255,255,.5); font: clamp(1rem, 2vw, 1.4rem) var(--mono); }
.contact-link:hover { color: var(--lime); }
.social-links { display: flex; justify-content: center; gap: 2.5rem; margin-top: 5rem; font: .64rem var(--mono); letter-spacing: .08em; }
.social-links a:hover { color: var(--lime); }
footer { display: flex; justify-content: space-between; padding: 2rem 4vw; color: rgba(255,255,255,.5); background: var(--forest); font: .55rem var(--mono); letter-spacing: .1em; }

.reveal { opacity: 0; transform: translateY(25px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  .site-header { padding: 1.5rem; }
  .menu-button { display: grid; gap: 4px; padding: .5rem; }
  .menu-button span:not(.sr-only) { display: block; width: 23px; height: 1px; background: currentColor; }
  .site-nav { position: absolute; top: 4.5rem; right: 1.5rem; display: none; flex-direction: column; width: 180px; padding: 1.5rem; color: var(--forest); background: var(--paper); box-shadow: 0 20px 40px rgba(0,0,0,.2); }
  .site-nav.open { display: flex; }
  .hero { height: auto; min-height: 100svh; grid-template-columns: 1fr; gap: 4rem; padding: 9rem 7vw 6rem; }
  .hero h1 { font-size: clamp(3rem, 11vw, 5rem); }
  .earth-card { width: min(85vw, 550px); justify-self: center; }
  .scroll-note { display: none; }
  .about, .projects { grid-template-columns: 1fr; min-height: 0; }
  .mini-stats { grid-column: 1; }
  .profile-portrait { width: min(76vw, 420px); justify-self: center; }
  .section-heading { grid-template-columns: 1fr; }
  .project-card { max-width: 650px; }
}

@media (max-width: 560px) {
  .section { padding: 6rem 1.5rem; }
  .brand { font-size: .6rem; }
  .hero { padding-inline: 1.5rem; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 1.5rem; }
  .earth-card { width: 100%; }
  .about-columns, .mini-stats { grid-template-columns: 1fr; }
  .profile-portrait { width: 100%; }
  .education-row { grid-template-columns: 1fr; gap: .6rem; }
  .mini-stats div { border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
  .research-item { grid-template-columns: 35px 1fr; padding-block: 2rem; }
  .item-icon { display: none; }
  .research-item p:last-child { line-height: 1.7; }
  .project-card { grid-template-columns: 1fr; }
  .project-visual { min-height: 330px; }
  .social-links { flex-direction: column; gap: 1.2rem; }
  footer { flex-direction: column; gap: 1rem; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}