/* ==========================================================================
   SMRC visual system 2026
   Editorial scale, friendly geometry, vivid safety colors, restrained motion.
   ========================================================================== */

:root {
  --ink: #111615;
  --ink-2: #1c2523;
  --paper: #fbfbf6;
  --paper-warm: #f0efe7;
  --surface: #ffffff;
  --text: #17201e;
  --muted: #63706c;
  --line: rgba(17, 22, 21, .14);
  --blue: #2864ff;
  --blue-deep: #1648cf;
  --cyan: #66dce3;
  --lime: #c8ff54;
  --orange: #ff784f;
  --yellow: #ffd84f;
  --violet: #9c83ff;
  --soft-blue: #dfe8ff;
  --soft-cyan: #dff8f5;
  --soft-orange: #ffe0d2;

  --ff-base: "Zen Kaku Gothic New", "Noto Sans JP", "Hiragino Sans",
             "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  --ff-display: "Space Grotesk", "Zen Kaku Gothic New", system-ui, sans-serif;
  --container: 1320px;
  --reading: 960px;
  --header-h: 68px;
  --radius-sm: 16px;
  --radius: 28px;
  --radius-lg: 48px;
  --ease: cubic-bezier(.2, .72, .2, 1);
  --shadow-soft: 0 14px 42px rgba(18, 31, 28, .08);
  --shadow-float: 0 24px 70px rgba(18, 31, 28, .16);
  --page-accent: var(--blue);
  --page-soft: var(--soft-blue);
}

body[data-page="about"] { --page-accent: #2c6df5; --page-soft: #cde9ff; }
body[data-page="compose"] { --page-accent: #55cda1; --page-soft: #d8f7e4; }
body[data-page="research"] { --page-accent: var(--orange); --page-soft: #ffd9c8; }
body[data-page="news"], body[data-page="post"] { --page-accent: #e3aa00; --page-soft: #ffe98c; }
body[data-page="member"] { --page-accent: #7359ee; --page-soft: #ddd5ff; }
body[data-page="publications"] { --page-accent: #2864ff; --page-soft: #dce6ff; }
body[data-page="seminar"] { --page-accent: #2d9a75; --page-soft: #cceede; }
body[data-page="media"] { --page-accent: #ef5c87; --page-soft: #ffd5e1; }
body[data-page="symposium"] { --page-accent: #f05b3f; --page-soft: #ffd8c7; }
body[data-page="contact"] { --page-accent: #54bd7a; --page-soft: #d7f1c5; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: clip; }
[id] { scroll-margin-top: 106px; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: var(--paper);
  font-family: var(--ff-base);
  font-size: 16px;
  line-height: 1.85;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
main { display: block; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--blue-deep); text-decoration: none; }
a:hover { text-decoration: none; }
button, input, textarea, select { font: inherit; }
h1, h2, h3, h4 { margin: 0 0 .65em; color: var(--ink); line-height: 1.16; }
p { margin: 0 0 1.15em; }
ul, ol { padding-left: 1.45em; }
table { width: 100%; border-collapse: collapse; }
::selection { color: var(--ink); background: var(--lime); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; border-radius: 6px; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper-warm); }
::-webkit-scrollbar-thumb { background: #a7b2ae; border: 3px solid var(--paper-warm); border-radius: 20px; }
::-webkit-scrollbar-thumb:hover { background: var(--blue); }

.container { width: min(100%, var(--container)); margin-inline: auto; padding-inline: clamp(20px, 4vw, 48px); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Header ------------------------------------------------------------------ */
.site-header {
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 0;
  width: 100%;
  padding: 14px clamp(12px, 2vw, 28px);
  pointer-events: none;
}
.site-header__inner {
  position: relative;
  width: min(100%, 1480px);
  min-height: var(--header-h);
  margin-inline: auto;
  padding: 7px 10px 7px 18px;
  display: flex;
  align-items: center;
  gap: 22px;
  pointer-events: auto;
  background: rgba(255, 255, 255, .91);
  border: 1px solid rgba(255, 255, 255, .72);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(8, 24, 20, .07);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  transition: box-shadow .3s ease, background .3s ease, transform .3s ease;
}
.site-header.is-scrolled .site-header__inner {
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 12px 36px rgba(8, 24, 20, .14);
}
.header-progress {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: -1px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--cyan), var(--lime), var(--orange));
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left;
}
.site-header__brand { display: flex; align-items: center; min-width: 252px; color: var(--ink); flex-shrink: 0; }
.site-header__brand:hover { color: var(--ink); }
.brand-logo { display: block; width: auto; object-fit: contain; }
.brand-logo--header { width: 252px; height: auto; max-height: 42px; }

.global-nav { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.global-nav > ul { display: flex; align-items: center; gap: 0; margin: 0; padding: 0; list-style: none; }
.global-nav a { color: var(--ink); }
.global-nav > ul > li > a,
.global-nav > ul > li > button {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 9px 13px;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s ease, background .2s ease;
}
.global-nav > ul > li > a:hover,
.global-nav > ul > li > button:hover { color: var(--blue-deep); background: var(--soft-blue); }
.global-nav > ul > li > a[aria-current="page"],
.global-nav > ul > li.has-current > button { color: var(--blue-deep); }
.global-nav > ul > li > a[aria-current="page"]::before,
.global-nav > ul > li.has-current > button::before {
  content: ""; width: 6px; height: 6px; background: var(--blue); border-radius: 50%;
}
.nav-item { position: relative; }
.nav-caret { width: 6px; height: 6px; border-right: 1.5px solid; border-bottom: 1.5px solid; transform: rotate(45deg) translateY(-2px); transition: transform .2s ease; }
.nav-item:hover .nav-caret, .nav-item:focus-within .nav-caret { transform: rotate(225deg) translate(-1px, -1px); }
.nav-dropdown {
  position: absolute;
  top: calc(100% + 13px);
  left: 50%;
  min-width: 280px;
  margin: 0;
  padding: 10px;
  list-style: none;
  background: rgba(255, 255, 255, .98);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow-float);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 8px);
  transition: opacity .22s ease, transform .22s var(--ease), visibility .22s;
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nav-dropdown a { display: block; padding: 11px 13px; border-radius: 13px; font-size: .88rem; font-weight: 700; line-height: 1.45; }
.nav-dropdown a:hover, .nav-dropdown a[aria-current="page"] { color: var(--blue-deep); background: var(--soft-blue); }
.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 7px 17px;
  color: #fff !important;
  background: var(--ink);
  border-radius: 999px;
  font: 700 .77rem/1 var(--ff-display);
  transition: background .2s ease, transform .2s ease;
}
.lang-switch:hover { background: var(--blue); transform: translateY(-1px); }
.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  margin-left: auto;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  color: #fff;
  background: var(--ink);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: currentColor; border-radius: 99px; transition: transform .25s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-scrim { display: none; }

/* Home hero --------------------------------------------------------------- */
.hero { padding: 12px; color: #fff; background: var(--paper); }
.hero__frame {
  position: relative;
  display: flex;
  align-items: center;
  height: min(980px, calc(100svh - 24px));
  min-height: 720px;
  overflow: hidden;
  background: #07111e;
  border-radius: var(--radius-lg);
  isolation: isolate;
}
.hero__bg { position: absolute; inset: 0; z-index: -3; overflow: hidden; }
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 57% center;
  transform: translate3d(var(--hero-x, 0), var(--hero-y, 0), 0) scale(1.07);
  opacity: .74;
  filter: saturate(.95) contrast(1.04);
  transition: transform 2s var(--ease), opacity 1.2s ease;
}
body.is-ready .hero__bg img { transform: translate3d(var(--hero-x, 0), var(--hero-y, 0), 0) scale(1.03); opacity: .9; }
.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4, 11, 24, .99) 0%, rgba(4, 11, 24, .88) 30%, rgba(4, 11, 24, .45) 62%, rgba(4, 11, 24, .16) 100%),
    linear-gradient(0deg, rgba(4, 11, 24, .75), transparent 42%);
}
.hero__content { position: relative; z-index: 3; padding-top: 150px; padding-bottom: 126px; }
.hero__kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 29px;
  color: rgba(255, 255, 255, .78);
  font: 700 clamp(.65rem, .8vw, .76rem)/1.2 var(--ff-display);
  letter-spacing: .16em;
  text-transform: uppercase;
  opacity: 1;
  transform: none;
}
.hero__kicker i { width: 9px; height: 9px; background: var(--lime); border-radius: 50%; box-shadow: 0 0 0 7px rgba(200, 255, 84, .13); }
.hero__title {
  width: min(1120px, 90%);
  margin: 0;
  color: #fff;
  font-size: clamp(3rem, 5.25vw, 5.8rem);
  font-weight: 900;
  letter-spacing: -.055em;
  line-height: 1.03;
}
.hero__title > span { display: block; opacity: 1; transform: none; }
.hero__title-accent { color: var(--lime); }
.hero__title small {
  display: block;
  margin-top: 25px;
  color: rgba(255, 255, 255, .67);
  font: 700 clamp(.64rem, .9vw, .82rem)/1.5 var(--ff-display);
  letter-spacing: .2em;
  text-transform: uppercase;
  opacity: 1;
  transform: none;
}
.hero__lead {
  max-width: 620px;
  margin-top: 35px;
  color: rgba(255, 255, 255, .82);
  font-size: clamp(.98rem, 1.25vw, 1.1rem);
  line-height: 1.85;
  opacity: 1;
  transform: none;
}
.hero__actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.hero > .hero__frame .hero__actions { opacity: 1; transform: none; }
body.is-ready .hero__kicker,
body.is-ready .hero__title > span,
body.is-ready .hero__title small,
body.is-ready .hero__lead,
body.is-ready .hero > .hero__frame .hero__actions { opacity: 1; transform: none; }
body[data-lang="en"] .hero__title { font-size: clamp(3rem, 5.45vw, 6rem); }
.hero__aside {
  position: absolute;
  z-index: 4;
  right: 30px;
  bottom: 34px;
  display: flex;
  gap: 24px;
  color: rgba(255, 255, 255, .55);
  font: 700 .62rem/1 var(--ff-display);
  letter-spacing: .18em;
}
.hero__scroll {
  position: absolute;
  z-index: 4;
  left: clamp(22px, 4vw, 60px);
  bottom: 30px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: rgba(255, 255, 255, .55);
  font: 700 .62rem/1 var(--ff-display);
  letter-spacing: .14em;
  text-transform: uppercase;
}
.hero__scroll::before { content: ""; width: 50px; height: 1px; background: rgba(255, 255, 255, .55); transform-origin: left; animation: scrollPulse 2.3s ease-in-out infinite; }
@keyframes scrollPulse { 0%, 100% { transform: scaleX(.35); opacity: .35; } 50% { transform: scaleX(1); opacity: 1; } }
.hero__orbits { position: absolute; z-index: 2; right: -110px; top: 7%; width: min(44vw, 620px); aspect-ratio: 1; pointer-events: none; opacity: .55; }
.hero__orbits::before, .hero__orbits::after, .hero__orbits i {
  content: "";
  position: absolute;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 50%;
}
.hero__orbits::before { inset: 0; }
.hero__orbits::after { inset: 18%; }
.hero__orbits i:nth-child(1) { inset: 35%; border-color: rgba(200, 255, 84, .55); }
.hero__orbits i:nth-child(2) { width: 15px; height: 15px; left: 6%; top: 52%; border: 0; background: var(--orange); box-shadow: 0 0 0 10px rgba(255, 120, 79, .13); animation: orbitDot 7s ease-in-out infinite; }
.hero__orbits i:nth-child(3) { width: 10px; height: 10px; right: 19%; top: 12%; border: 0; background: var(--lime); box-shadow: 0 0 0 8px rgba(200, 255, 84, .12); animation: orbitDot 6s 1s ease-in-out infinite reverse; }
@keyframes orbitDot { 50% { transform: translate(18px, -13px); } }

.motion-ribbon { margin: -1px 0 0; overflow: hidden; color: var(--ink); background: var(--lime); transform: rotate(-.7deg) scale(1.015); transform-origin: center; }
.motion-ribbon__track { display: flex; align-items: center; gap: 26px; width: max-content; padding: 17px 0; font: 700 .77rem/1 var(--ff-display); letter-spacing: .16em; animation: ribbon 28s linear infinite; }
.motion-ribbon__track i { display: block; width: 8px; height: 8px; background: var(--blue); border-radius: 50%; }
@keyframes ribbon { to { transform: translateX(-50%); } }

/* Page header ------------------------------------------------------------- */
.page-header {
  position: relative;
  min-height: 500px;
  margin: 12px;
  padding: 176px 0 72px;
  overflow: hidden;
  color: var(--ink);
  background: var(--page-soft);
  border-radius: var(--radius-lg);
  isolation: isolate;
}
.page-header::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: clamp(-90px, 2vw, 20px);
  top: 52%;
  width: clamp(300px, 38vw, 560px);
  aspect-ratio: 1;
  background: var(--page-accent);
  border-radius: 50%;
  transform: translateY(-50%);
  opacity: .94;
}
.page-header::after {
  position: absolute;
  z-index: -1;
  right: 3%;
  bottom: -5%;
  color: rgba(17, 22, 21, .12);
  font: 700 clamp(4.4rem, 11vw, 10rem)/.75 var(--ff-display);
  letter-spacing: -.07em;
  white-space: nowrap;
}
body[data-page="about"] .page-header::after { content: "DATABASE"; }
body[data-page="compose"] .page-header::after { content: "OVERVIEW"; }
body[data-page="research"] .page-header::after { content: "RESEARCH"; }
body[data-page="news"] .page-header::after,
body[data-page="post"] .page-header::after { content: "NEWS"; }
body[data-page="member"] .page-header::after { content: "PEOPLE"; }
body[data-page="publications"] .page-header::after { content: "PUBLICATIONS"; }
body[data-page="seminar"] .page-header::after { content: "SEMINAR"; }
body[data-page="media"] .page-header::after { content: "MEDIA"; }
body[data-page="symposium"] .page-header::after { content: "SYMPOSIUM"; }
body[data-page="contact"] .page-header::after { content: "KOGANEI"; }
.page-header .container { position: relative; z-index: 2; }
.page-header .en {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 22px;
  padding: 8px 14px;
  color: var(--ink);
  background: rgba(255, 255, 255, .62);
  border-radius: 999px;
  font: 700 .7rem/1 var(--ff-display);
  letter-spacing: .14em;
  text-transform: uppercase;
}
.page-header .en::before { content: ""; width: 7px; height: 7px; background: var(--page-accent); border-radius: 50%; }
.page-header h1 { max-width: 940px; margin: 0; color: var(--ink); font-size: clamp(2.7rem, 6.2vw, 6rem); font-weight: 900; letter-spacing: -.05em; line-height: 1.02; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin: 54px 0 0; padding: 0; list-style: none; color: rgba(17, 22, 21, .63); font-size: .78rem; font-weight: 700; }
.breadcrumb li + li::before { content: "↗"; margin-right: 8px; color: var(--page-accent); }
.breadcrumb a { color: inherit; border-bottom: 1px solid currentColor; }

/* Sections and headings -------------------------------------------------- */
.section { padding: clamp(88px, 10vw, 152px) 0; }
.section--alt, .section--warm { background: var(--paper-warm); }
.section--blue,
.section--ink,
.section--dark {
  position: relative;
  margin: 12px;
  overflow: hidden;
  border-radius: var(--radius-lg);
}
.section--blue { color: #fff; background: var(--blue); }
.section--ink, .section--dark { color: rgba(255, 255, 255, .82); background: var(--ink); }
.section--ink::before, .section--dark::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, .08) 1px, transparent 1px);
  background-size: 20px 20px;
  mask-image: linear-gradient(120deg, #000, transparent 68%);
  -webkit-mask-image: linear-gradient(120deg, #000, transparent 68%);
}
.section-heading-row { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 56px; }
.section-heading-row .section-title { margin-bottom: 0; }
.section-title { position: relative; margin-bottom: clamp(42px, 5vw, 68px); }
.section-title .en {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 17px;
  padding: 7px 13px;
  color: var(--blue-deep);
  background: var(--soft-blue);
  border-radius: 999px;
  font: 700 .68rem/1 var(--ff-display);
  letter-spacing: .14em;
  text-transform: uppercase;
}
.section-title .en::before { content: ""; width: 7px; height: 7px; background: currentColor; border-radius: 50%; }
.section-title h2 { max-width: 980px; margin: 0; color: var(--ink); font-size: clamp(2.15rem, 4.8vw, 4.8rem); font-weight: 900; letter-spacing: -.05em; line-height: 1.05; }
.section--blue .section-title .en { color: var(--ink); background: var(--lime); }
.section--blue .section-title h2,
.section--ink .section-title h2,
.section--dark .section-title h2 { color: #fff; }
.section--ink .section-title .en,
.section--dark .section-title .en { color: var(--ink); background: var(--lime); }

/* Buttons and text links ------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 52px;
  padding: 12px 25px;
  color: var(--ink);
  background: transparent;
  border: 1.5px solid transparent;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .25s var(--ease), background .2s ease, color .2s ease, border-color .2s ease, box-shadow .25s ease;
}
.btn:hover { transform: translateY(-3px); }
.btn:active { transform: translateY(-1px); }
.btn span { font-size: 1.08em; }
.btn--primary { color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(40, 100, 255, .24); }
.btn--primary:hover { color: #fff; background: var(--blue-deep); box-shadow: 0 16px 34px rgba(40, 100, 255, .3); }
.hero .btn--primary { color: var(--ink); background: var(--lime); box-shadow: none; }
.hero .btn--primary:hover { background: #dcff91; }
.btn--ghost { color: #fff; border-color: rgba(255, 255, 255, .62); background: rgba(255, 255, 255, .05); }
.btn--ghost:hover { color: var(--ink); background: #fff; border-color: #fff; }
.btn--outline { color: var(--ink); border-color: var(--ink); }
.btn--outline:hover { color: #fff; background: var(--ink); }
.btn--light { color: var(--blue-deep); background: #fff; }
.btn--light:hover { color: var(--ink); background: var(--lime); }
.btn--sm { min-height: 42px; padding: 9px 18px; font-size: .79rem; }
.text-link { display: inline-flex; align-items: center; gap: 15px; margin-top: 20px; color: var(--ink); font-weight: 900; border-bottom: 2px solid var(--ink); }
.text-link span { transition: transform .2s var(--ease); }
.text-link:hover span { transform: translate(3px, -3px); }

/* Home narrative --------------------------------------------------------- */
.home-intro { padding-top: clamp(110px, 12vw, 180px); }
.home-intro__head { display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(40px, 8vw, 120px); align-items: end; margin-bottom: clamp(72px, 9vw, 130px); }
.home-intro__head .section-title { margin: 0; }
body[data-page="home"][data-lang="ja"] .home-intro__head .section-title h2 { white-space: nowrap; }
.home-intro__manifesto { margin: 0; color: var(--ink); font-size: clamp(1.75rem, 3.3vw, 3.45rem); font-weight: 900; letter-spacing: -.04em; line-height: 1.28; }
.home-intro__grid { display: grid; grid-template-columns: minmax(300px, .82fr) 1.18fr; gap: clamp(44px, 9vw, 132px); align-items: center; }
.home-intro__visual { position: relative; margin: 0; padding: 10px; background: var(--cyan); border-radius: 999px 999px 32px 32px; }
.home-intro__visual::before { content: ""; position: absolute; z-index: -1; left: -30px; bottom: 16%; width: 100px; height: 100px; background: var(--orange); border-radius: 50%; }
.home-intro__visual img { width: 100%; aspect-ratio: .76; object-fit: cover; border-radius: inherit; }
.home-intro__visual figcaption { display: flex; justify-content: space-between; gap: 18px; padding: 12px 10px 4px; color: var(--ink); font: 700 .65rem/1 var(--ff-display); letter-spacing: .11em; text-transform: uppercase; }
.home-intro__copy { max-width: 680px; }
.home-intro__copy p { color: #44504d; font-size: clamp(1rem, 1.2vw, 1.1rem); }

.home-news-section { position: relative; }
.home-news-section::before { content: ""; position: absolute; right: 5%; top: 10%; width: 140px; height: 140px; background: var(--yellow); border-radius: 50%; filter: blur(.1px); opacity: .65; }
#home-news { position: relative; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
#home-news .card { display: grid; grid-template-columns: minmax(170px, 42%) 1fr; min-height: 290px; }
#home-news .card__media { height: 100%; aspect-ratio: auto; max-height: none; }
#home-news .card__body { padding: 27px; }
#home-news .card--no-media .card__body { grid-column: 1 / -1; }
#home-news .card:nth-child(2) { background: var(--soft-blue); }
#home-news .card:nth-child(3) { background: var(--soft-orange); }
#home-news .card:nth-child(4) { background: #dff2d4; }

.research-grid { counter-reset: research; }
.research-grid .feature { counter-increment: research; }
.home-fields::after { content: ""; position: absolute; right: -120px; top: 80px; width: 340px; height: 340px; border: 1px solid rgba(255, 255, 255, .27); border-radius: 50%; box-shadow: 0 0 0 55px rgba(255, 255, 255, .05), 0 0 0 110px rgba(255, 255, 255, .035); }
.home-fields .container { position: relative; z-index: 1; }
.feature {
  position: relative;
  min-height: 340px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  color: var(--ink);
  background: #fff;
  border-radius: var(--radius);
  transition: transform .3s var(--ease), box-shadow .3s ease;
}
.feature::before { content: "0" counter(research); position: absolute; z-index: 2; left: 24px; top: 22px; font: 700 .74rem/1 var(--ff-display); letter-spacing: .12em; }
.feature::after { content: "↗"; position: absolute; z-index: 2; right: 22px; top: 18px; display: grid; place-items: center; width: 36px; height: 36px; color: #fff; background: var(--ink); border-radius: 50%; font-size: .9rem; transition: transform .3s var(--ease); }
.feature:nth-child(2) { background: var(--lime); }
.feature:nth-child(3) { background: var(--soft-cyan); }
.feature:nth-child(4) { background: var(--soft-orange); }
.feature:nth-child(5) { background: var(--yellow); }
.feature:nth-child(6) { background: #d8d1ff; }
.feature:hover { transform: translateY(-8px); box-shadow: 0 20px 50px rgba(6, 26, 72, .24); }
.feature:hover::after { transform: rotate(45deg); }
.feature img { width: 78%; max-height: 220px; margin: 32px auto 10px; object-fit: contain; border-radius: 18px; mix-blend-mode: multiply; transition: transform .4s var(--ease); }
.feature:hover img { transform: scale(1.04) rotate(-1deg); }
.feature h3 { position: relative; z-index: 2; margin: 0; color: var(--ink); font-size: clamp(1.15rem, 1.55vw, 1.45rem); font-weight: 900; letter-spacing: -.025em; }

.home-hub__layout { display: grid; grid-template-columns: .68fr 1.32fr; gap: clamp(36px, 5vw, 68px); align-items: center; }
.home-hub__copy { position: relative; z-index: 1; }
.home-hub__copy .section-title { margin-bottom: 50px; }
.home-hub__copy .section-title h2 { font-size: clamp(1.9rem, 3.25vw, 3.45rem); line-height: 1.12; }
.home-hub__keywords { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; color: rgba(255, 255, 255, .5); font: 700 .67rem/1.3 var(--ff-display); letter-spacing: .12em; }
.home-hub__keywords i { width: 6px; height: 6px; background: var(--orange); border-radius: 50%; }
.home-hub__diagram { position: relative; z-index: 1; margin: 0; padding: 14px; background: #fff; border-radius: 36px; transform: rotate(1.2deg); }
.home-hub__diagram::before { content: "COLLABORATION"; position: absolute; left: -28px; top: -24px; padding: 10px 16px; color: var(--ink); background: var(--lime); border-radius: 999px; font: 700 .63rem/1 var(--ff-display); letter-spacing: .12em; }
.home-hub__diagram img { width: 100%; border-radius: 24px; }

.home-projects .grid { align-items: stretch; }
.project-card { position: relative; background: var(--surface); }
.project-card__no { position: absolute; z-index: 4; top: 18px; left: 18px; display: grid; place-items: center; width: 46px; height: 46px; color: var(--ink); background: var(--lime); border-radius: 50%; font: 700 .75rem/1 var(--ff-display); }
.project-card:nth-child(2) .project-card__no { background: var(--orange); }
.project-card:nth-child(3) .project-card__no { background: var(--cyan); }
.project-card .card__media { aspect-ratio: 5 / 4; max-height: none; background: #edf2f5; }
.project-card .card__media img { object-fit: contain; padding: 18px; }
.project-card .card__body { padding: 28px; }
.project-card .card__title { font-size: clamp(1.2rem, 1.8vw, 1.55rem); }

.home-cta { padding-bottom: 0; }
.cta-band {
  position: relative;
  margin: 0 12px;
  padding: clamp(68px, 9vw, 130px) clamp(26px, 7vw, 110px);
  overflow: hidden;
  color: #fff;
  background: var(--blue);
  border-radius: var(--radius-lg);
  isolation: isolate;
}
.cta-band::before, .cta-band::after { content: ""; position: absolute; z-index: -1; border: 1px solid rgba(255, 255, 255, .28); border-radius: 50%; }
.cta-band::before { width: 540px; height: 540px; right: -140px; top: -240px; box-shadow: 0 0 0 70px rgba(255, 255, 255, .05), 0 0 0 140px rgba(255, 255, 255, .035); }
.cta-band::after { width: 110px; height: 110px; right: 15%; bottom: 18%; background: var(--lime); border: 0; }
.cta-band__eyebrow { display: inline-flex; padding: 8px 14px; color: var(--ink); background: var(--lime); border-radius: 999px; font: 700 .68rem/1 var(--ff-display); letter-spacing: .1em; text-transform: uppercase; }
.cta-band h2 { max-width: 1060px; margin: 28px 0 58px; color: #fff; font-size: clamp(2.3rem, 5vw, 5.2rem); font-weight: 900; letter-spacing: -.06em; line-height: 1.03; }
body[data-page="home"][data-lang="ja"] .cta-band h2 { white-space: nowrap; }
.cta-band__footer { display: flex; align-items: end; justify-content: space-between; gap: 40px; }
.cta-band__footer > p { max-width: 530px; margin: 0; color: rgba(255, 255, 255, .78); }
.cta-band .hero__actions { position: relative; z-index: 1; flex-shrink: 0; margin: 0; }

/* Grids and cards -------------------------------------------------------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  color: var(--text);
  background: var(--surface);
  border: 1px solid rgba(17, 22, 21, .1);
  border-radius: var(--radius);
  transition: transform .3s var(--ease), box-shadow .3s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-6px); border-color: transparent; box-shadow: var(--shadow-float); }
.card__media { display: block; aspect-ratio: 4 / 3; max-height: 260px; overflow: hidden; background: #e9eeec; }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s var(--ease); }
.card:hover .card__media img { transform: scale(1.045); }
.card__body { padding: 24px; }
.card__meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 12px; margin-bottom: 13px; color: var(--muted); font: 700 .74rem/1.4 var(--ff-display); }
.card__meta time { font-variant-numeric: tabular-nums; }
.badge { display: inline-flex; padding: 6px 10px; color: var(--ink); background: var(--lime); border-radius: 999px; font-size: .64rem; letter-spacing: .05em; }
.badge--muted { background: var(--paper-warm); }
.card__title { margin: 0 0 10px; color: var(--ink); font-size: 1.08rem; font-weight: 900; line-height: 1.45; }
.card__title a { color: inherit; }
.card__title a::after { content: ""; position: absolute; inset: 0; z-index: 2; }
.card__excerpt { margin: 0; color: var(--muted); font-size: .88rem; line-height: 1.7; }
.card__excerpt--scroll { position: relative; z-index: 3; max-height: 8.5em; overflow-y: auto; padding-right: 8px; overscroll-behavior: contain; }

/* Members ---------------------------------------------------------------- */
.member-group { margin-bottom: clamp(70px, 9vw, 120px); }
.member-group:last-child { margin-bottom: 0; }
.member-group > h2 { display: flex; align-items: center; gap: 18px; margin: 0 0 34px; color: var(--ink); font-size: clamp(1.8rem, 3.5vw, 3rem); font-weight: 900; letter-spacing: -.04em; }
.member-group > h2::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.member-card { padding-bottom: 24px; text-align: left; }
.member-card__photo { aspect-ratio: 1 / 1.05; overflow: hidden; background: var(--paper-warm); }
.member-card__photo img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.9); transition: transform .5s var(--ease), filter .3s ease; }
.member-card:hover .member-card__photo img { transform: scale(1.04); filter: saturate(1.05); }
.member-card h3 { margin: 21px 22px 4px; color: var(--ink); font-size: 1.08rem; font-weight: 900; }
.member-card .en-name { display: block; margin-top: 4px; color: var(--muted); font: 500 .7rem/1.35 var(--ff-display); letter-spacing: .04em; }
.member-card .title, .member-card > .card__excerpt, .member-card .links { margin-left: 22px; margin-right: 22px; }
.member-card .title { margin-top: 8px; margin-bottom: 0; color: var(--blue-deep); font-size: .82rem; font-weight: 900; }
.member-card .links { margin-top: 10px; font-size: .78rem; }
.member-card .links a { position: relative; z-index: 3; font-weight: 700; }

/* Lists, publications, timeline ----------------------------------------- */
.timeline { position: relative; margin: 0; padding: 0; list-style: none; counter-reset: event; }
.timeline::before { content: ""; position: absolute; left: 18px; top: 16px; bottom: 20px; width: 2px; background: linear-gradient(var(--page-accent), transparent); }
.timeline > li { position: relative; margin-bottom: 18px; padding: 28px 30px 30px 70px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); counter-increment: event; }
.timeline > li::before { content: counter(event); position: absolute; left: 0; top: 28px; display: grid; place-items: center; width: 38px; height: 38px; color: #fff; background: var(--page-accent); border: 6px solid var(--paper); border-radius: 50%; font: 700 .68rem/1 var(--ff-display); }
.timeline .tl-date { margin-bottom: 7px; color: var(--page-accent); font: 700 .75rem/1.5 var(--ff-display); letter-spacing: .04em; }
.timeline h3 { margin: 0 0 10px; color: var(--ink); font-size: 1.25rem; }
.timeline .tl-body { color: var(--muted); font-size: .93rem; white-space: pre-line; }

.filter-tabs { display: flex; flex-wrap: wrap; gap: 9px; margin: 0 0 56px; }
.filter-tabs button { min-height: 45px; padding: 9px 18px; color: var(--ink); background: transparent; border: 1px solid var(--ink); border-radius: 999px; font-size: .82rem; font-weight: 900; cursor: pointer; transition: color .2s ease, background .2s ease, transform .2s ease; }
.filter-tabs button:hover { transform: translateY(-2px); }
.filter-tabs button[aria-pressed="true"] { color: #fff; background: var(--ink); }
.pub-year { display: flex; align-items: center; gap: 20px; margin: 70px 0 22px; color: var(--ink); font: 700 clamp(2rem, 4vw, 3.5rem)/1 var(--ff-display); letter-spacing: -.05em; }
.pub-year:first-child { margin-top: 0; }
.pub-year::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.pub-list { margin: 0; padding: 0; list-style: none; counter-reset: publication; }
.pub-list li { position: relative; margin-bottom: 10px; padding: 20px 22px 20px 66px; color: #3c4845; background: #fff; border: 1px solid var(--line); border-radius: 18px; font-size: .92rem; line-height: 1.72; counter-increment: publication; transition: transform .2s var(--ease), border-color .2s ease, box-shadow .2s ease; }
.pub-list li::before { content: counter(publication, decimal-leading-zero); position: absolute; left: 20px; top: 22px; color: var(--page-accent); font: 700 .68rem/1 var(--ff-display); }
.pub-list li:hover { transform: translateX(5px); border-color: var(--page-accent); box-shadow: var(--shadow-soft); }
.pub-list .pub-links { position: relative; z-index: 3; display: flex; flex-wrap: wrap; gap: 9px; margin-top: 10px; }
.pub-links a { display: inline-flex; padding: 6px 10px; color: var(--ink); background: var(--page-soft); border-radius: 999px; font-size: .75rem; font-weight: 900; }
#symposium-list { counter-reset: symposium; }
#symposium-list .card { display: flex; min-height: 0; flex-direction: column; background: var(--soft-blue); }
#symposium-list .card:nth-child(2n) { background: var(--soft-orange); }
#symposium-list .card:nth-child(3n) { background: #d9f4e3; }
#symposium-list .symposium-card__poster { position: relative; z-index: 3; display: block; padding: 10px; overflow: hidden; background: #0b1110; }
#symposium-list .symposium-card__poster img { width: 100%; height: auto; border-radius: 17px; transition: transform .55s var(--ease); }
#symposium-list .card:hover .symposium-card__poster img { transform: scale(1.018); }
#symposium-list .card__body { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex: 1; padding: 24px 26px 26px; }
#symposium-list .card__title { max-width: 100%; margin: 0; font-size: clamp(1.15rem, 2vw, 1.65rem); white-space: nowrap; }
#symposium-list .card__title a::after { display: none; }
#symposium-list .symposium-card__action { position: relative; z-index: 3; flex-shrink: 0; }

/* Article and prose ------------------------------------------------------ */
.article { max-width: 940px; margin-inline: auto; padding: clamp(24px, 5vw, 62px); background: #fff; border: 1px solid var(--line); border-radius: 36px; }
.article__hero { margin: 0 0 34px; padding: 10px; overflow: hidden; background: var(--paper-warm); border-radius: var(--radius); }
.article__hero img { width: auto; max-width: 100%; max-height: 580px; margin-inline: auto; border-radius: 20px; }
.article__meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px; margin-bottom: 20px; color: var(--muted); font: 700 .78rem/1.4 var(--ff-display); }
.article__title { margin-bottom: 35px; color: var(--ink); font-size: clamp(1.85rem, 3.8vw, 3.2rem); font-weight: 900; letter-spacing: -.04em; line-height: 1.25; }
.article__body { color: #3d4946; font-size: 1rem; line-height: 2; white-space: pre-line; }
.article__body h3, .article__body h4 { margin-top: 2em; }
.article__body a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.article__footer { margin-top: 50px; padding-top: 28px; border-top: 1px solid var(--line); }

.prose { max-width: var(--reading); margin-inline: auto; color: #3e4a47; }
.prose > p { font-size: clamp(.98rem, 1.2vw, 1.08rem); }
.prose h2 { position: relative; margin: 4em 0 1.1em; padding-top: 25px; color: var(--ink); border-top: 1px solid var(--line); font-size: clamp(1.65rem, 3.2vw, 2.75rem); font-weight: 900; letter-spacing: -.035em; }
.prose h2::before { content: ""; position: absolute; left: 0; top: -5px; width: 42px; height: 9px; background: var(--page-accent); border-radius: 999px; }
.prose h2:first-child { margin-top: 0; }
.prose figure { margin: 42px 0 72px; padding: clamp(10px, 2vw, 18px); background: #fff; border: 1px solid var(--line); border-radius: 32px; }
.prose figure img { width: auto; max-width: 100%; max-height: 760px; margin-inline: auto; border-radius: 20px; }
.prose figcaption { margin-top: 10px; color: var(--muted); font-size: .8rem; text-align: center; }
.prose a:not(.btn):not(.pub-links a) { text-decoration: underline; text-underline-offset: 4px; }

/* Stats, media, embeds, access ------------------------------------------- */
.stats-row { position: relative; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 15px; }
.stat { min-width: 0; padding: 32px 18px; color: var(--ink); background: #fff; border-radius: var(--radius); text-align: center; transition: transform .3s var(--ease); }
.stat:nth-child(2) { background: var(--lime); }
.stat:nth-child(3) { background: var(--soft-cyan); }
.stat:nth-child(4) { background: var(--soft-orange); }
.stat:hover { transform: translateY(-7px) rotate(-.4deg); }
.stat img { width: 52px; height: 52px; margin: 0 auto 20px; object-fit: contain; filter: saturate(0) contrast(1.3); }
.stat .num { color: var(--ink); font: 700 clamp(1.75rem, 3.4vw, 3rem)/1 var(--ff-display); letter-spacing: -.055em; white-space: nowrap; font-variant-numeric: tabular-nums; }
.stat .label { margin-top: 11px; color: #3c4845; font-size: .82rem; font-weight: 700; }
.stats-note { margin: 28px 0 0; color: rgba(255, 255, 255, .55); font-size: .78rem; text-align: center; }
.video-frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--ink); border: 8px solid #fff; border-radius: var(--radius); box-shadow: var(--shadow-soft); transition: transform .3s var(--ease); }
.video-frame:hover { transform: translateY(-5px); }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin: 0; padding: 0; list-style: none; }
.tag-list li { padding: 9px 15px; color: var(--ink); background: var(--page-soft); border-radius: 999px; font-size: .82rem; font-weight: 900; transition: transform .2s var(--ease), background .2s ease; }
.tag-list li:hover { transform: translateY(-3px); background: var(--lime); }
.access-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: stretch; }
.access-map { min-height: 100%; padding: 10px; background: var(--page-soft); border-radius: var(--radius); }
.access-map iframe, .access-map img { width: 100%; height: 100%; min-height: 450px; border: 0; border-radius: 20px; }
.def-table { height: 100%; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); border-collapse: separate; border-spacing: 0; }
.def-table th, .def-table td { padding: 17px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; font-size: .9rem; }
.def-table tr:last-child th, .def-table tr:last-child td { border-bottom: 0; }
.def-table th { width: 7.5em; color: var(--ink); background: var(--paper-warm); font-weight: 900; white-space: nowrap; }
.def-table tr:hover td { background: var(--page-soft); }

/* Footer ----------------------------------------------------------------- */
.site-footer { position: relative; margin: 120px 12px 12px; overflow: hidden; color: rgba(255, 255, 255, .7); background: var(--ink); border-radius: var(--radius-lg); }
.site-footer::before { content: ""; position: absolute; right: -130px; top: -180px; width: 480px; height: 480px; border: 1px solid rgba(255, 255, 255, .14); border-radius: 50%; box-shadow: 0 0 0 70px rgba(255, 255, 255, .03), 0 0 0 140px rgba(255, 255, 255, .02); }
.site-footer a { color: inherit; }
.site-footer a:hover { color: var(--lime); }
.site-footer__main { position: relative; display: grid; grid-template-columns: 1.3fr .75fr 1fr; gap: clamp(40px, 7vw, 110px); width: min(100%, var(--container)); margin-inline: auto; padding: 88px clamp(24px, 5vw, 62px) 62px; }
.footer-brand__lockup { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.brand-logo--footer { width: min(336px, 100%); padding: 8px 10px; background: #fff; border-radius: 12px; }
.footer-brand .brand-en { display: block; margin-bottom: 23px; color: rgba(255, 255, 255, .42); font: 700 .64rem/1.4 var(--ff-display); letter-spacing: .14em; }
.footer-brand p { max-width: 460px; margin: 0; }
.site-footer h3 { margin: 0 0 20px; color: var(--lime); font: 700 .67rem/1 var(--ff-display); letter-spacing: .14em; text-transform: uppercase; }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li { margin-bottom: 10px; font-size: .86rem; }
.site-footer__signal { position: relative; display: flex; align-items: center; justify-content: center; gap: clamp(14px, 2.5vw, 38px); padding: 30px 20px 42px; color: #fff; font: 700 clamp(2.5rem, 8vw, 8.5rem)/.9 var(--ff-display); letter-spacing: -.07em; white-space: nowrap; }
.site-footer__signal i { width: clamp(10px, 1.2vw, 18px); height: clamp(10px, 1.2vw, 18px); background: var(--orange); border-radius: 50%; }
.site-footer__signal i:last-of-type { background: var(--lime); }
.site-footer__copy { padding: 22px clamp(22px, 4vw, 48px); color: rgba(255, 255, 255, .38); border-top: 1px solid rgba(255, 255, 255, .1); font: 500 .7rem/1.4 var(--ff-display); text-align: center; }

/* Utilities and motion --------------------------------------------------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.mt-6 { margin-top: 48px; }
.mb-2 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 32px; }
.loading { grid-column: 1 / -1; padding: 54px 0; color: var(--muted); text-align: center; }
.loading::before { content: ""; display: block; width: 34px; height: 34px; margin: 0 auto 13px; border: 3px solid rgba(17, 22, 21, .15); border-top-color: var(--blue); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.reveal { opacity: 0; transform: translateY(34px) scale(.99); transition: opacity .78s ease, transform .78s var(--ease); transition-delay: var(--reveal-delay, 0ms); }
.reveal.is-visible { opacity: 1; transform: none; }
.skip-link { position: fixed; z-index: 2000; left: 24px; top: -90px; padding: 11px 18px; color: #fff; background: var(--blue); border-radius: 0 0 12px 12px; transition: top .2s ease; pointer-events: auto; }
.skip-link:focus { top: 0; }

/* Responsive ------------------------------------------------------------- */
@media (max-width: 1180px) {
  /* backdrop-filter makes fixed descendants use this 68px-tall element as
     their containing block in Chromium/WebKit. Disable it while the fixed
     drawer is in use so the drawer is sized against the viewport. */
  .site-header__inner { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .nav-toggle { position: relative; z-index: 1003; display: flex; }
  .global-nav {
    position: fixed;
    z-index: 1002;
    top: 94px;
    right: 14px;
    bottom: 14px;
    width: min(390px, calc(100vw - 28px));
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    overflow-y: auto;
    background: #fff;
    border-radius: 30px;
    box-shadow: var(--shadow-float);
    opacity: 0;
    visibility: hidden;
    transform: translateX(24px) scale(.98);
    transform-origin: top right;
    transition: opacity .25s ease, transform .3s var(--ease), visibility .25s;
  }
  .global-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .global-nav > ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .global-nav > ul > li { border-bottom: 1px solid var(--line); }
  .global-nav > ul > li > a, .global-nav > ul > li > button { width: 100%; min-height: 52px; padding: 12px 8px; justify-content: space-between; border-radius: 0; }
  .global-nav > ul > li > a[aria-current="page"]::before,
  .global-nav > ul > li.has-current > button::before { display: none; }
  .nav-item:hover .nav-caret, .nav-item:focus-within .nav-caret { transform: rotate(45deg) translateY(-2px); }
  .nav-item.is-open .nav-caret { transform: rotate(225deg) translate(-1px, -1px); }
  .nav-dropdown { position: static; display: none; min-width: 0; padding: 0 0 10px 12px; background: transparent; border: 0; border-radius: 0; box-shadow: none; opacity: 1; visibility: visible; transform: none; }
  .nav-item:hover .nav-dropdown, .nav-item:focus-within .nav-dropdown { transform: none; }
  .nav-item.is-open .nav-dropdown { display: block; }
  .lang-switch { align-self: flex-start; margin-top: 20px; }
  .nav-scrim { position: fixed; z-index: 1001; inset: 0; display: block; width: 100%; height: 100%; padding: 0; background: rgba(8, 16, 15, .38); border: 0; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .25s ease, visibility .25s; backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
  body.nav-open .nav-scrim { opacity: 1; visibility: visible; pointer-events: auto; }
  .home-intro__head { grid-template-columns: 1fr 1.35fr; }
  .home-hub__layout { grid-template-columns: 1fr; }
  .home-hub__diagram { width: min(860px, 100%); }
  #home-news { grid-template-columns: 1fr; }
  #home-news .card { min-height: 300px; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .hero__title { width: 100%; font-size: clamp(3rem, 9vw, 5.7rem); }
  .hero__orbits { right: -170px; width: 560px; }
  .page-header::before { right: -150px; opacity: .82; }
  .home-intro__head, .home-intro__grid { grid-template-columns: 1fr; }
  .home-intro__manifesto { max-width: 800px; }
  .home-intro__visual { width: min(560px, 86%); }
  .home-intro__copy { margin-left: auto; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .access-grid { grid-template-columns: 1fr; }
  .site-footer__main { grid-template-columns: 1.2fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .cta-band__footer { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 680px) {
  :root { --radius-lg: 34px; --radius: 22px; }
  .site-header { padding: 9px; }
  .site-header__inner { min-height: 62px; padding: 7px 7px 7px 13px; }
  .site-header__brand { min-width: 0; }
  .brand-logo--header { width: min(210px, 54vw); }
  .nav-toggle { width: 46px; height: 46px; }
  .global-nav { top: 82px; right: 9px; bottom: 9px; width: calc(100vw - 18px); }
  .hero, .page-header, .section--blue, .section--ink, .section--dark, .cta-band, .site-footer { margin-left: 6px; margin-right: 6px; }
  .hero { padding: 6px 0; }
  .hero__frame { height: min(900px, max(720px, calc(100svh - 12px))); min-height: 720px; border-radius: 34px; }
  .hero__content { padding-top: 130px; padding-bottom: 110px; }
  .hero__title { font-size: clamp(2.75rem, 13vw, 4.9rem); line-height: 1.04; }
  body[data-lang="ja"] .hero__title { font-size: clamp(2.45rem, 11vw, 4.3rem); line-height: 1.12; }
  .hero__title small { max-width: 88%; letter-spacing: .12em; }
  .hero__lead { max-width: 92%; margin-top: 27px; font-size: .94rem; }
  .hero__aside { display: none; }
  .hero__scroll { left: 22px; bottom: 23px; }
  .hero__orbits { right: -250px; top: 18%; }
  .motion-ribbon__track { padding: 14px 0; }
  .page-header { min-height: 420px; padding: 140px 0 48px; }
  .page-header::before { width: 300px; right: -170px; top: 48%; }
  .page-header::after { right: 2%; bottom: 1%; font-size: 4rem; }
  .page-header h1 { font-size: clamp(2.35rem, 12vw, 4.2rem); }
  .breadcrumb { margin-top: 40px; }
  .section { padding: 86px 0; }
  .section--blue, .section--ink, .section--dark { margin-top: 6px; margin-bottom: 6px; }
  .section-heading-row { align-items: flex-start; flex-direction: column; margin-bottom: 44px; }
  .home-intro__visual { width: 94%; }
  .home-intro__visual::before { width: 70px; height: 70px; left: -16px; }
  #home-news .card { display: block; min-height: 0; }
  #home-news .card__media { height: auto; aspect-ratio: 16 / 10; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .feature { min-height: 300px; }
  .home-hub__diagram { padding: 8px; border-radius: 25px; transform: none; }
  .home-hub__diagram::before { left: 10px; top: -17px; }
  .project-card .card__media { aspect-ratio: 16 / 11; }
  #symposium-list .card__body { align-items: flex-start; flex-direction: column; }
  .cta-band { padding: 62px 24px; }
  .cta-band h2 { margin-bottom: 42px; }
  .cta-band::after { width: 70px; height: 70px; right: 2%; bottom: 6%; opacity: .4; }
  .cta-band .hero__actions { width: 100%; align-items: stretch; flex-direction: column; }
  .cta-band .btn { width: 100%; }
  .video-grid { grid-template-columns: 1fr; }
  .timeline > li { padding: 25px 20px 27px 58px; }
  .pub-list li { padding-left: 54px; }
  .pub-list li::before { left: 15px; }
  .article { padding: 20px; border-radius: 24px; }
  .prose figure { margin-bottom: 52px; border-radius: 22px; }
  .def-table th, .def-table td { display: block; width: 100%; }
  .def-table th { padding-bottom: 7px; border-bottom: 0; }
  .def-table td { padding-top: 7px; }
  .site-footer { margin-top: 86px; }
  .site-footer__main { grid-template-columns: 1fr; gap: 38px; padding-top: 64px; }
  .footer-brand { grid-column: auto; }
  .site-footer__signal { justify-content: flex-start; overflow: hidden; font-size: 13vw; }
}

@media (max-width: 430px) {
  .brand-logo--header { width: min(174px, 51vw); }
  .hero__kicker { max-width: 88%; font-size: .57rem; letter-spacing: .1em; }
  .hero__actions { align-items: stretch; flex-direction: column; width: min(100%, 330px); }
  .hero__actions .btn { width: 100%; }
  .stats-row { grid-template-columns: 1fr; }
  body[data-page="home"][data-lang="ja"] .cta-band h2 { font-size: clamp(1.15rem, 6vw, 1.55rem); }
  .stat { display: grid; grid-template-columns: 46px 1fr; column-gap: 15px; align-items: center; text-align: left; }
  .stat img { grid-row: 1 / 3; width: 42px; height: 42px; margin: 0; }
  .stat .num { font-size: 2rem; }
  .stat .label { margin-top: 5px; }
}

@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; }
  .hero__kicker, .hero__title > span, .hero__title small, .hero__lead, .hero > .hero__frame .hero__actions { opacity: 1; transform: none; }
}