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*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;color:var(--ink);background:var(--white);font-family:Inter,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans JP",sans-serif;line-height:1.65;overflow-x:hidden}a{color:inherit}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit}.container{width:min(var(--max),calc(100% - 48px));margin-inline:auto}.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;left:16px;top:-80px;z-index:1000;background:#fff;padding:12px 18px;border-radius:6px}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(7,59,76,.09);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.nav-wrap{height:76px;width:min(var(--max),calc(100% - 48px));margin:auto;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;letter-spacing:.09em;font-size:1rem;white-space:nowrap}.brand-mark{width:31px;height:31px;border-radius:8px;background:var(--deep);position:relative;display:inline-block}.brand-mark:after{content:"";position:absolute;inset:8px 6px;border-left:3px solid #67e8d3;border-bottom:3px solid #67e8d3;transform:skew(-25deg) rotate(-15deg)}nav{margin-left:auto;display:flex;align-items:center;gap:26px}nav a{text-decoration:none;font-size:.88rem;font-weight:650;position:relative}nav a:after{content:"";position:absolute;left:0;right:100%;bottom:-8px;height:2px;background:var(--teal);transition:right .2s}nav a:hover:after,nav a:focus-visible:after{right:0}.language-toggle{border:1px solid var(--line);background:white;border-radius:999px;padding:8px 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var(--teal);padding:20px;color:var(--ink);font-weight:750}.banquet-section{padding-top:0}.banquet-card{background:var(--deep);color:#fff;padding:50px}.banquet-card h2 span{display:block;font-size:1rem;letter-spacing:.1em;color:#67e8d3;margin-top:10px}.banquet-card p{color:#c9dddf}.organizer-section{background:#f5f9fa}.organizer-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin-top:35px}.organizer-grid article{background:white;border:1px solid var(--line);padding:35px}.organizer-grid h3{font-size:1.25rem;margin:0}.organizer-grid small{color:var(--muted)}.update{display:grid;grid-template-columns:170px 1fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:25px 0;margin-top:40px}.update time{font-weight:800;color:var(--teal)}.update p{margin:0}.contact-section{background:#dff2f0}.contact-card>p{font-weight:700}.contact-card span{font-weight:400;color:var(--muted)}footer{background:#031f2a;color:#b8d0d3;padding:55px 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@keyframes drift{to{transform:translateX(-15px) translateY(8px)}}
@media (max-width:900px){.nav-wrap{width:min(100% - 32px,var(--max))}.menu-toggle{display:block;margin-left:auto;order:2}.language-toggle{order:3}nav{display:none;position:absolute;left:0;right:0;top:76px;background:white;padding:16px 24px 25px;border-bottom:1px solid var(--line);box-shadow:0 15px 30px rgba(5,45,60,.1);flex-direction:column;align-items:stretch;gap:0}nav.open{display:flex}nav a{padding:13px}.hero{min-height:auto}.hero-art{width:85vw;right:-30vw;top:5%;opacity:.35}.hero-grid{grid-template-columns:1fr}.event-card{max-width:540px}.topic-grid{grid-template-columns:1fr 1fr}.program-list{grid-template-columns:1fr 1fr}.committee-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.container{width:min(100% - 32px,var(--max))}.nav-wrap{height:68px}.brand{font-size:.85rem}.brand-mark{width:27px;height:27px}.language-toggle{font-size:0;padding:8px 10px}.language-toggle span{font-size:.85rem}nav{top:68px}.hero{padding:58px 0 50px}.hero-grid{gap:35px}h1{font-size:clamp(2.25rem,12vw,3.45rem)}.hero-actions{display:grid;grid-template-columns:1fr 1fr}.button{justify-content:center;text-align:center;padding:9px}.event-card{padding:24px}.section{padding:75px 0}.split,.placeholder-panel,.section-heading,.banquet-card,.contact-card{grid-template-columns:1fr;gap:28px}.topic-grid{grid-template-columns:1fr;margin-top:40px}.topic-grid article{min-height:0}.topic-grid h3{margin-top:28px}.lecture-card{grid-template-columns:1fr;padding:35px 25px;gap:5px}.lecture-accent{font-size:4rem}.placeholder-panel{padding:28px}.program-list{grid-template-columns:1fr}.section-heading>p{text-align:left}.committee-grid,.organizer-grid{grid-template-columns:1fr}.venue-details{padding-left:20px}.banquet-card{padding:32px 25px}.update{grid-template-columns:1fr;gap:8px}.footer-grid{display:block}.footer-grid>div:last-child{text-align:left;margin-top:30px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
@media print{.site-header,.hero-art,.hero-actions,.language-toggle{display:none}.hero{min-height:0}.section{padding:35px 0}.topics-section,.students-section,footer{background:white;color:var(--ink)}.topic-grid{grid-template-columns:repeat(2,1fr)}.topic-grid article{background:white;color:var(--ink)}}

/* Red/salmon mechanical palette: an indirect character-inspired reference, without insignia. */
.hero{background:linear-gradient(125deg,#fffaf7 0%,#fae8e3 58%,#e8bab7 100%)}
.hero:before{background-image:linear-gradient(rgba(98,31,43,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(98,31,43,.055) 1px,transparent 1px)}
.brand-mark{background:#4a1723}.brand-mark:after{border-color:#f29a94}
.laminates{filter:drop-shadow(0 14px 8px rgba(111,31,45,.17))}
.topics-section{background:#4a1723}.topics-section .section-kicker,.topic-no{color:#f3a49d}.topic-grid article{background:#4a1723}.topic-grid p{color:#f0d9d6}.topic-grid small{color:#d8aaa8}
.lecture-section,.program-section,.organizer-section{background:#fbefec}.lecture-accent{color:#e5a29e}.lecture-card{border-top-color:#85182d}.lecture-title{color:#a33b4d}
.students-section{background:linear-gradient(120deg,#4a1723,#9e3546)}.students-section .section-kicker,.fact-list strong{color:#ffc0b8}.students-section p{color:#f6deda}
.venue-section{background:#f5ded9}.contact-section{background:#f4d7d2}.venue-details{border-left-color:#d6aaa6}
.banquet-card,footer{background:#321019}.footer-brand .brand-mark{background:#6a2030}
.contact-placeholder,.notice{border-left-color:#85182d}
.site-header{border-bottom-color:rgba(74,23,35,.12)}
.button{border-color:#c98f91}.button:hover,.button:focus-visible{border-color:#a33b4d}
.banquet-card h2 span{color:#f3a49d}.banquet-card p{color:#efd6d3}
footer{color:#dcbfbd}

/* Secondary mass-production olive: used sparingly for technical/research signals. */
.eyebrow,.section-kicker,.card-label,.label,.date-block .month,.program-list li>span,.update time{color:var(--olive)}
.topics-section .section-kicker,.topic-no{color:#c5cf9f}
.topic-grid article:nth-child(even){box-shadow:inset 0 3px 0 #778457}
.venue-tag{background:var(--olive)}
.translation summary{color:var(--olive)}

/* Special Lecture portrait and abstract. */
.lecture-card{grid-template-columns:150px minmax(0,1fr)}
.lecture-portrait{margin:0;align-self:start}
.lecture-portrait img{display:block;width:100%;height:auto;aspect-ratio:3/4;object-fit:cover}
.lecture-content{min-width:0}
.lecture-title{margin-bottom:28px;overflow-wrap:anywhere}
.lecture-abstract{border-top:1px solid var(--line);padding-top:24px}
.lecture-abstract h3{margin:0 0 10px;font-size:1.1rem}
.lecture-abstract p{margin:0;color:var(--muted);font-size:1rem;line-height:1.75}
@media (max-width:640px){.lecture-card{gap:28px}.lecture-portrait{width:min(150px,100%);margin-inline:auto}.lecture-title{font-size:clamp(1.35rem,7vw,1.8rem)}}