/* ============================================================
   CREST Twin Agriculture — site stylesheet
   ============================================================ */
:root {
  --ink: #0b1a16;
  --ink-2: #13271f;
  --paper: #f5f4ee;
  --paper-2: #ebe9e0;
  --text: #1a2420;
  --muted: #5d6a64;
  --line: rgba(11, 26, 22, 0.12);
  --leaf: #8fd16a;      /* real   */
  --twin: #4fd6c9;      /* virtual */
  --accent: #c9f27a;
  --f-jp: "Zen Kaku Gothic New", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --f-en: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
  --wrap: 1180px;
  --ease: cubic-bezier(.2, .7, .1, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--f-jp);
  font-size: 16px;
  line-height: 1.95;
  letter-spacing: .03em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
html[lang="en"] body { font-family: var(--f-en); letter-spacing: 0; line-height: 1.75; }
img { max-width: 100%; display: block; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--ink); }

.wrap { width: min(var(--wrap), 100% - 48px); margin-inline: auto; }
.en { font-family: var(--f-en); letter-spacing: 0; }
.mono { font-family: var(--f-mono); letter-spacing: .04em; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background .4s var(--ease), border-color .4s, color .4s;
  color: #fff;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(245, 244, 238, .86);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  color: var(--ink);
  border-color: var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 30px; height: 30px; }
.brand-text { font-family: var(--f-en); font-weight: 600; font-size: 15px; letter-spacing: .02em; line-height: 1.15; }
.brand-text small { display: block; font-family: var(--f-mono); font-weight: 400; font-size: 10px; opacity: .65; letter-spacing: .12em; }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a {
  font-family: var(--f-en); font-size: 13px; font-weight: 500; letter-spacing: .06em;
  text-decoration: none; position: relative; padding: 4px 0;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 100%;
  background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .4s var(--ease);
}
.nav a:hover::after { transform: scaleX(1); transform-origin: left; }
.lang { display: inline-flex; border: 1px solid currentColor; border-radius: 99px; overflow: hidden; font-family: var(--f-mono); font-size: 11px; }
.lang a, .lang span { padding: 3px 10px; text-decoration: none; }
.lang span { background: currentColor; }
.lang span b { color: var(--ink); font-weight: 500; }
.site-header.is-scrolled .lang span b { color: var(--paper); }
.menu-btn { display: none; background: none; border: 0; color: inherit; width: 40px; height: 40px; cursor: pointer; padding: 0; }
.menu-btn span { display: block; width: 22px; height: 1.5px; background: currentColor; margin: 6px auto; transition: transform .3s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100svh; background: var(--ink); color: #fff; overflow: hidden;
  display: flex; flex-direction: column; justify-content: flex-end;
}
#twin-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse at 70% 40%, transparent 30%, rgba(11,26,22,.55) 85%),
    linear-gradient(to top, rgba(11,26,22,.95) 0%, transparent 45%);
}
.hero-grid {
  position: absolute; inset: 0; pointer-events: none; opacity: .14;
  background-image: linear-gradient(rgba(255,255,255,.4) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.4) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(90deg, transparent 0%, transparent 45%, #000 75%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, transparent 45%, #000 75%);
}
.hero-inner { position: relative; z-index: 3; padding-bottom: clamp(56px, 10vh, 110px); }
.hero-kicker { font-family: var(--f-mono); font-size: 12px; letter-spacing: .2em; color: var(--accent); margin: 0 0 22px; }
.hero h1 {
  font-family: var(--f-en); font-weight: 600; letter-spacing: -.035em; line-height: .92;
  font-size: clamp(56px, 11vw, 168px); margin: 0;
}
.hero h1 .thin { font-weight: 300; font-style: italic; color: var(--twin); }
.hero-sub { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; margin-top: 40px; align-items: end; }
.hero-sub p { margin: 0; }
.hero-title-ja { font-size: clamp(17px, 1.6vw, 21px); font-weight: 500; line-height: 1.7; }
.hero-meta { font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .08em; line-height: 2; opacity: .75; text-align: right; }
.scroll-cue { position: absolute; z-index: 3; left: 50%; bottom: 22px; width: 1px; height: 46px; background: rgba(255,255,255,.2); overflow: hidden; }
.scroll-cue::after { content: ""; position: absolute; left: 0; top: -46px; width: 1px; height: 46px; background: #fff; animation: cue 2.2s var(--ease) infinite; }
@keyframes cue { to { top: 46px; } }

/* ---------- Sections ---------- */
section { position: relative; }
.sec { padding: clamp(96px, 14vw, 180px) 0; }
.sec-head { display: grid; grid-template-columns: 220px 1fr; gap: 40px; margin-bottom: 64px; }
.sec-label { font-family: var(--f-mono); font-size: 12px; letter-spacing: .16em; color: var(--muted); padding-top: 14px; }
.sec-label b { color: var(--ink); font-weight: 500; margin-right: 10px; }
.sec-title { font-family: var(--f-en); font-size: clamp(40px, 6vw, 80px); font-weight: 600; letter-spacing: -.035em; line-height: 1; margin: 0; }
.sec-title-ja { display: block; font-family: var(--f-jp); font-size: 15px; font-weight: 500; letter-spacing: .14em; margin-top: 18px; color: var(--muted); }

/* Vision */
.vision { background: var(--paper); }
.vision-lead {
  font-size: clamp(24px, 3.1vw, 40px); line-height: 1.65; font-weight: 500; letter-spacing: .02em; margin: 0 0 56px;
}
html[lang="en"] .vision-lead { line-height: 1.3; letter-spacing: -.015em; }
.vision-lead em { font-style: normal; background: linear-gradient(transparent 62%, var(--accent) 62%); }


/* Vision: future vs today */
.contrast { display: grid; grid-template-columns: 1.15fr 1fr; gap: 20px; }
.contrast-col { border-radius: 4px; padding: 40px 40px 44px; position: relative; overflow: hidden; }
.contrast-tag { display: block; font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .16em; margin-bottom: 20px; }
.contrast-col p { margin: 0; }
.contrast-col.future { background: var(--ink); color: #eef4ee; }
.contrast-col.future::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: radial-gradient(rgba(79,214,201,.35) 1px, transparent 1px); background-size: 14px 14px;
  mask-image: linear-gradient(120deg, transparent 40%, #000); -webkit-mask-image: linear-gradient(120deg, transparent 40%, #000);
}
.contrast-col.future .contrast-tag { color: var(--twin); }
.contrast-col.future p { font-style: italic; font-size: 17px; line-height: 2.05; position: relative; }
html[lang="en"] .contrast-col.future p { font-family: var(--f-en); font-weight: 300; font-size: 18px; line-height: 1.7; }
.contrast-col.today { border: 1px solid var(--line); background: transparent; color: #2c3833; }
.contrast-col.today .contrast-tag { color: var(--muted); }
.contrast-col.today p { font-size: 15.5px; }

/* Twin diagram (based on proposal Fig.1) */
.twin-fig { margin: 110px 0 0; padding-top: 64px; border-top: 1px solid var(--line);
  display: grid; grid-template-columns: 1fr .82fr 1.6fr; align-items: stretch; }
.twin-fig > figcaption { grid-column: 1 / -1; margin-top: 18px; font-size: 13px; color: var(--muted); }
.tf-panel { position: relative; border-radius: 6px; overflow: hidden; min-height: 470px; }
.tf-panel img { display: block; width: 100%; height: 100%; object-fit: cover; }
.tf-real img { position: absolute; inset: 0; }
.tf-real::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(11,26,22,.85), transparent 45%); }
.tf-tag { position: absolute; z-index: 2; top: 16px; left: 16px; display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .12em; color: #fff; padding: 7px 14px 7px 12px; border-radius: 99px;
  background: rgba(20,40,20,.55); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); border: 1px solid rgba(255,255,255,.25); }
.tf-tag i { width: 8px; height: 8px; border-radius: 50%; background: var(--leaf); }
.tf-tag-v { background: rgba(5,15,40,.55); border-color: rgba(79,214,201,.4); }
.tf-tag-v i { background: var(--twin); box-shadow: 0 0 10px var(--twin); }
.tf-real-list { position: absolute; z-index: 2; left: 18px; right: 18px; bottom: 16px; margin: 0; padding: 0; list-style: none;
  display: flex; flex-wrap: wrap; gap: 6px; }
.tf-real-list li { font-size: 12px; color: #fff; padding: 3px 10px; border: 1px solid rgba(255,255,255,.35); border-radius: 99px; }
.tf-virtual { display: grid; grid-template-columns: 1fr 1.05fr; background: #070f22; box-shadow: 0 0 0 1px rgba(79,214,201,.15) inset; }
.tf-vimg { position: relative; }
.tf-vimg img { position: absolute; inset: 0; }
.tf-vimg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 60%, #070f22); }
.tf-scales { list-style: none; margin: 0; padding: 18px 18px 18px 6px; display: flex; flex-direction: column; justify-content: center; gap: 12px; }
.tf-scale { display: grid; grid-template-columns: 58px 1fr; gap: 12px; align-items: center; padding: 12px;
  border: 1px solid rgba(79,214,201,.35); border-radius: 6px; background: rgba(10,25,60,.6);
  box-shadow: 0 0 24px -12px rgba(79,214,201,.8); transition: border-color .4s, transform .4s var(--ease); }
.tf-scale:hover { border-color: var(--twin); transform: translateX(-3px); }
.tf-scale img { width: 58px; height: 72px; object-fit: cover; border-radius: 3px; }
.tf-scale div { display: flex; flex-direction: column; line-height: 1.35; }
.tf-num { font-family: var(--f-mono); font-size: 10px; color: var(--twin); letter-spacing: .14em; }
.tf-scale b { color: #fff; font-size: 15px; font-weight: 700; margin-top: 2px; }
.tf-scale em { font-style: normal; font-family: var(--f-en); font-weight: 600; color: var(--accent); font-size: 13px; }
.tf-scale small { color: rgba(255,255,255,.62); font-size: 11px; margin-top: 5px; line-height: 1.5; }
.tf-center { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: space-between; padding: 6px 4px; min-height: 470px; }
.tf-arcs { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.tf-arcs .arc { fill: none; stroke-width: 2; stroke-dasharray: 6 7; animation: flow 1.6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -26; } }
.tf-label { position: relative; z-index: 2; text-align: center; padding: 0 10px; background: var(--paper); }
.tf-label b { display: block; font-size: 15px; font-weight: 700; }
.tf-label small { display: block; font-size: 11.5px; color: var(--muted); line-height: 1.6; margin-top: 2px; }
.tf-label-top { margin-top: 2px; }
.tf-core { position: relative; z-index: 2; width: min(200px, 90%); aspect-ratio: 1; display: grid; place-items: center; }
.tf-ring { position: absolute; inset: 0; border-radius: 50%; border: 1px dashed rgba(11,26,22,.35); animation: spin 40s linear infinite; }
.tf-ring::before { content: ""; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; border-radius: 50%; background: var(--twin); box-shadow: 0 0 10px var(--twin); }
@keyframes spin { to { transform: rotate(360deg); } }
.tf-core-in { width: 70%; aspect-ratio: 1; border-radius: 50%; background: var(--ink); color: #fff; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  box-shadow: 0 0 0 6px rgba(79,214,201,.12), 0 20px 40px -18px rgba(11,26,22,.7); }
.tf-core-title { font-size: 13.5px; font-weight: 700; line-height: 1.45; letter-spacing: .04em; }
html[lang="en"] .tf-core-title { font-family: var(--f-en); font-size: 13px; letter-spacing: 0; }
.tf-core-sub { font-size: 9.5px; color: var(--accent); margin-top: 6px; letter-spacing: .06em; }
.orb { position: absolute; z-index: 3; font-family: var(--f-mono); font-size: 9.5px; letter-spacing: .04em; white-space: nowrap;
  background: var(--paper); border: 1px solid var(--line); border-radius: 99px; padding: 2px 8px; transform: translate(-50%, -50%); }
.orb.o1 { left: 50%; top: 0%; } .orb.o2 { left: 98%; top: 36%; } .orb.o3 { left: 82%; top: 88%; }
.orb.o4 { left: 16%; top: 88%; } .orb.o5 { left: 2%; top: 36%; }
@media (prefers-reduced-motion: reduce) { .tf-ring, .tf-arcs .arc { animation: none; } }

/* Challenge photos */
.ch-img { margin: 0 0 28px; position: relative; aspect-ratio: 4 / 3; overflow: hidden; border-radius: 4px; }
.ch-credit { position: absolute; z-index: 3; top: 8px; right: 8px; font-size: 10px; color: rgba(255,255,255,.85); background: rgba(0,0,0,.4); padding: 1px 7px; border-radius: 2px; line-height: 1.6; }
.ch-credit a { color: inherit; text-decoration: none; }
.ch-credit a:hover { text-decoration: underline; }
.ch-img img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.85) contrast(1.05); transition: transform 1.2s var(--ease); }
.challenge-item:hover .ch-img img { transform: scale(1.04); }
.ch-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(11,26,22,.75), transparent 50%); }
.ch-img figcaption { position: absolute; z-index: 2; left: 12px; right: 12px; bottom: 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.ch-img figcaption span { font-size: 11.5px; color: var(--ink); background: var(--accent); padding: 2px 9px; border-radius: 2px; font-weight: 500; }
html[lang="ja"] 
/* Member photos */
.pi .avatar img { transition: transform .8s var(--ease); object-position: center 25%; }
a.avatar { display: grid; text-decoration: none; }
a.avatar:hover img { transform: scale(1.05); }
.avatar-go { position: absolute; right: 8px; bottom: 8px; width: 28px; height: 28px; border-radius: 50%; background: var(--ink); color: #fff;
  display: grid; place-items: center; font-size: 13px; opacity: 0; transform: translateY(4px); transition: opacity .3s, transform .3s var(--ease); }
a.avatar:hover .avatar-go, a.avatar:focus-visible .avatar-go { opacity: 1; transform: none; }
.pi .theme + a.link { margin-left: 12px; }

/* Challenge (dark) */
.challenge { background: var(--ink); color: #e9efe9; }
.challenge .sec-label { color: rgba(255,255,255,.5); }
.challenge .sec-label b { color: var(--accent); }
.challenge .sec-title-ja { color: rgba(255,255,255,.55); }
.challenge-grid { display: grid; grid-template-columns: repeat(3, 1fr); column-gap: 40px; border-top: 1px solid rgba(255,255,255,.14); }
.challenge-item { padding: 40px 0; }
.challenge-item .scale { font-family: var(--f-mono); font-size: 11px; letter-spacing: .16em; color: var(--twin); }
.challenge-item h3 { font-size: 22px; margin: 14px 0 18px; font-weight: 500; line-height: 1.5; }
.challenge-item p { margin: 0; color: rgba(233,239,233,.72); font-size: 15px; }
.challenge-q { margin-top: 26px; display: flex; flex-direction: column; gap: 8px; }
.challenge-q span { font-size: 13.5px; padding: 8px 14px; border: 1px solid rgba(255,255,255,.18); border-radius: 99px; width: fit-content; color: #fff; }
.challenge-note { margin-top: 72px; max-width: 1000px; font-size: clamp(18px, 1.8vw, 22px); line-height: 1.9; color: #fff; }

/* Research */
.research { background: var(--paper); }
.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.project {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: 4px;
  padding: 36px 32px 34px; display: flex; flex-direction: column; min-height: 520px; overflow: hidden;
  transition: transform .6s var(--ease), box-shadow .6s var(--ease);
}
.project:hover { transform: translateY(-6px); box-shadow: 0 30px 60px -30px rgba(11,26,22,.35); }
.project .num { font-family: var(--f-mono); font-size: 12px; color: var(--muted); letter-spacing: .14em; }
.project .glyph { height: 150px; margin: 18px -8px 10px; }
.project .glyph svg { width: 100%; height: 100%; }
.project h3 { font-family: var(--f-en); font-size: 34px; font-weight: 600; letter-spacing: -.03em; margin: 0; line-height: 1.1; }
.project .scale-ja { font-size: 14px; font-weight: 700; margin: 8px 0 18px; color: #2f6f3f; letter-spacing: .08em; }
html[lang="en"] .project .scale-ja { letter-spacing: .02em; }
.project p { font-size: 14.5px; line-height: 1.9; margin: 0 0 22px; color: #34403b; }
.project .tags { margin-top: auto; display: flex; flex-wrap: wrap; gap: 6px; }
.project .tags span { font-family: var(--f-mono); font-size: 10.5px; letter-spacing: .04em; padding: 4px 9px; background: var(--paper-2); border-radius: 2px; }
.project .lead { font-size: 12.5px; color: var(--muted); border-top: 1px dashed var(--line); padding-top: 14px; margin-top: 18px; }
.project .lead b { color: var(--ink); font-weight: 600; }

.platform {
  margin-top: 20px; background: var(--ink); color: #fff; border-radius: 4px; padding: 48px 48px;
  display: grid; grid-template-columns: 1fr 1.25fr; gap: 56px; position: relative; overflow: hidden;
}
.platform::before {
  content: ""; position: absolute; right: -10%; top: -60%; width: 70%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, rgba(79,214,201,.22), transparent 65%);
}
.platform .num { font-family: var(--f-mono); font-size: 12px; color: var(--twin); letter-spacing: .14em; }
.platform h3 { font-family: var(--f-en); font-size: clamp(30px, 3.4vw, 44px); letter-spacing: -.03em; margin: 12px 0 6px; line-height: 1.1; font-weight: 600; }
.platform .scale-ja { color: var(--accent); font-weight: 700; font-size: 14px; letter-spacing: .08em; }
.platform p { color: rgba(255,255,255,.78); font-size: 15px; margin: 0 0 16px; position: relative; }
.platform ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(255,255,255,.12); position: relative; }
.platform li { background: var(--ink); padding: 18px 18px; font-size: 14px; }
.platform li .mono { display: block; font-size: 10px; color: var(--twin); margin-bottom: 4px; letter-spacing: .14em; }

/* Roadmap */
.roadmap { background: var(--paper-2); }
.timeline { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); border-top: 1px solid var(--ink); }
.timeline .yr { padding: 18px 14px 0 0; font-family: var(--f-mono); font-size: 12px; letter-spacing: .06em; }
.timeline .yr b { display: block; font-family: var(--f-en); font-size: 28px; font-weight: 500; letter-spacing: -.02em; }
.timeline .yr::before { content: ""; display: block; width: 9px; height: 9px; background: var(--ink); border-radius: 50%; margin: -23px 0 18px; }
.phases { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; margin-top: 44px; row-gap: 12px; }
.phase { padding: 22px 24px; border-radius: 3px; font-size: 14.5px; line-height: 1.75; }
.phase .tag { font-family: var(--f-mono); font-size: 10.5px; letter-spacing: .16em; display: block; margin-bottom: 8px; opacity: .7; }
.phase h4 { font-size: 17px; margin: 0 0 8px; font-weight: 700; }
.phase.p1 { grid-column: 1 / span 3; background: #fff; margin-right: 6px; }
.phase.p2 { grid-column: 4 / span 3; background: var(--ink); color: #fff; margin-left: 6px; }
.milestones { margin-top: 56px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.ms { border-top: 1px solid var(--ink); padding-top: 22px; }
.ms .mono { font-size: 11px; color: var(--muted); letter-spacing: .14em; }
.ms h4 { font-size: 20px; margin: 6px 0 10px; font-weight: 700; }
.ms p { margin: 0; color: #34403b; font-size: 15px; }

/* Members */
.members { background: var(--paper); }
.pis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pi { border-top: 2px solid var(--ink); padding-top: 26px; }
.pi .avatar {
  width: 168px; aspect-ratio: 1; border-radius: 3px; margin-bottom: 22px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, #dfe6d8, #c7d6c4);
  display: grid; place-items: center;
}
.pi .avatar img { width: 100%; height: 100%; object-fit: cover; }
.pi .avatar .initial { font-family: var(--f-en); font-size: 64px; font-weight: 300; color: rgba(11,26,22,.35); letter-spacing: -.04em; }
.pi .role { font-family: var(--f-mono); font-size: 11px; letter-spacing: .14em; color: var(--muted); }
.pi h3 { font-size: 26px; margin: 4px 0 2px; font-weight: 700; letter-spacing: .06em; }
.pi .en-name { font-family: var(--f-en); font-size: 14px; color: var(--muted); letter-spacing: .02em; }
.pi .aff { font-size: 14px; margin: 14px 0 10px; line-height: 1.7; }
.pi .theme { font-size: 13px; display: inline-block; padding: 4px 10px; background: var(--ink); color: #fff; border-radius: 2px; }
.pi a.link { font-family: var(--f-mono); font-size: 11px; letter-spacing: .1em; display: inline-block; margin-top: 14px; text-decoration: none; border-bottom: 1px solid currentColor; }
.collab { margin-top: 72px; display: grid; grid-template-columns: 220px 1fr; gap: 40px; }
.collab h4 { margin: 0; font-family: var(--f-mono); font-size: 12px; letter-spacing: .14em; font-weight: 400; color: var(--muted); }
.collab table { width: 100%; border-collapse: collapse; font-size: 15px; }
.collab td { padding: 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.collab td:first-child { width: 30%; font-weight: 700; }
.cg-list { display: flex; flex-direction: column; gap: 36px; }
.cg-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: 6px 14px; padding-bottom: 10px; border-bottom: 1px solid var(--ink); }
.cg-head b { font-size: 16px; font-weight: 700; }
.cg-head small { font-size: 12.5px; color: var(--muted); }
.cg-tag { font-family: var(--f-mono); font-size: 10.5px; letter-spacing: .12em; color: #fff; background: var(--ink); padding: 2px 9px; border-radius: 2px; }
.collab td:last-child { color: var(--muted); }

/* News */
.news { background: #fff; border-top: 1px solid var(--line); }
.news-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.news-list li { display: grid; grid-template-columns: 160px 120px 1fr; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.news-list time { font-family: var(--f-mono); font-size: 13px; }
.news-list .cat { font-family: var(--f-mono); font-size: 10.5px; letter-spacing: .14em; border: 1px solid var(--ink); border-radius: 99px; padding: 2px 10px; width: fit-content; }
.news-list a { text-decoration: none; background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size .4s var(--ease); }
.news-list a:hover { background-size: 100% 1px; }

/* Publications */
.pubs { background: #fff; padding-top: 0; }
.pub-empty { border: 1px dashed var(--line); padding: 40px; text-align: center; color: var(--muted); font-size: 14px; border-radius: 4px; }
.pub-list { list-style: none; margin: 0; padding: 0; counter-reset: pub; }
.pub-list li { padding: 20px 0 20px 56px; border-bottom: 1px solid var(--line); position: relative; font-size: 15px; }
.pub-list li::before { counter-increment: pub; content: counter(pub, decimal-leading-zero); position: absolute; left: 0; top: 22px; font-family: var(--f-mono); font-size: 12px; color: var(--muted); }

/* Contact / footer */
.contact { background: var(--ink); color: #fff; overflow: hidden; }
.contact .sec-label { color: rgba(255,255,255,.5); }
.contact .sec-label b { color: var(--accent); }
.contact-big { font-family: var(--f-en); font-size: clamp(34px, 6.5vw, 96px); font-weight: 600; letter-spacing: -.04em; line-height: 1; text-decoration: none; display: inline-block; }
.contact-big .arrow { display: inline-block; transition: transform .5s var(--ease); color: var(--twin); }
.contact-big:hover .arrow { transform: translateX(14px); }
.contact-info { margin-top: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; color: rgba(255,255,255,.75); font-size: 14.5px; }
.contact-info b { color: #fff; display: block; font-weight: 500; margin-bottom: 6px; }
.site-footer { background: var(--ink); color: rgba(255,255,255,.5); border-top: 1px solid rgba(255,255,255,.1); padding: 36px 0; font-size: 12.5px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.site-footer a { text-decoration: none; color: rgba(255,255,255,.75); }
.site-footer a:hover { color: #fff; }

/* Reveal */
.rv { opacity: 0; transform: translateY(28px); transition: opacity 1.1s var(--ease), transform 1.1s var(--ease); }
.rv.in { opacity: 1; transform: none; }
.rv.d1 { transition-delay: .08s; } .rv.d2 { transition-delay: .16s; } .rv.d3 { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .nav { position: fixed; inset: 0; background: var(--ink); color: #fff; flex-direction: column; justify-content: center; gap: 26px;
         opacity: 0; pointer-events: none; transition: opacity .4s; }
  .nav a { font-size: 22px; }
  .nav.open { opacity: 1; pointer-events: auto; }
  .menu-btn { display: block; position: relative; z-index: 60; }
  body.menu-open .site-header { color: #fff; background: transparent; border-color: transparent; }
  body.menu-open .menu-btn span:nth-child(1) { transform: translateY(3.75px) rotate(45deg); }
  body.menu-open .menu-btn span:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); }
  .sec-head,     .contrast { grid-template-columns: 1fr; }
  .contrast-col { padding: 30px 24px; }
  .twin-fig { grid-template-columns: 1fr; gap: 0; }
  .tf-panel { min-height: 0; }
  .tf-real { aspect-ratio: 4 / 3; }
  .tf-center { min-height: 400px; }
  .tf-arcs { display: none; }
  .tf-label { background: transparent; }
  .tf-label-top::after { content: "↓"; display: block; color: var(--twin); font-size: 20px; }
  .tf-label-bot::before { content: "↑"; display: block; color: var(--leaf); font-size: 20px; }
  .tf-virtual { grid-template-columns: 1fr; }
  .tf-vimg { aspect-ratio: 4 / 3; }
  .tf-vimg img { object-position: center 70%; }
  .tf-vimg::after { background: linear-gradient(to top, #070f22, transparent 50%); }
  .tf-scales { padding: 6px 14px 16px; }
  .projects { grid-template-columns: 1fr; }
  .project { min-height: 0; }
  .platform { grid-template-columns: 1fr; padding: 36px 26px; gap: 28px; }
  .challenge-grid { grid-template-columns: 1fr; }
  .challenge-item { padding: 32px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
  .pis { grid-template-columns: 1fr; gap: 48px; }
  .hero-sub { grid-template-columns: 1fr; gap: 20px; }
  .hero-meta { text-align: left; }
  .timeline, .phases { grid-template-columns: repeat(3, 1fr); }
  .timeline .yr:nth-child(n+4) { margin-top: 30px; }
  .phase.p1, .phase.p2 { grid-column: 1 / -1; margin: 0; }
  .milestones, .contact-info { grid-template-columns: 1fr; }
  .news-list li { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 560px) {
  .wrap { width: calc(100% - 32px); }
  .platform ul { grid-template-columns: 1fr; }
  }