:root {
      --yellow: #ffd500;
      --pink: #ffa8e2;
      --blue: #248cff;
      --lime: #b2ff53;
      --orange: #ffa646;
      --purple: #6c55f0;
      --text: #272727;
      --text-soft: #585858;
      --text-muted: #77776b;
      --bg: #ffffff;
      --beige: #f0f0e2;
      --gray: #f8f8f8;
      --border: #e3e3d2;
      --white: #ffffff;
      --container: 1060px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--text);
      background: var(--bg);
      font-family: Inter, "Noto Sans", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    a { color: var(--blue); text-decoration-thickness: 0.08em; text-underline-offset: 0.18em; }
    a:hover { color: var(--purple); }
    .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: var(--yellow);
      border-bottom: 1px solid rgba(39, 39, 39, 0.12);
    }
    .nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { color: var(--text); font-size: 1.05rem; font-weight: 850; letter-spacing: 0.03em; text-decoration: none; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
    .nav-links a {
      color: var(--text);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 800;
      border-radius: 999px;
      padding: 9px 13px;
    }
    .nav-links a:hover { background: var(--white); color: var(--text); }

    main { padding: 56px 0 0; }
    section { margin: 0 0 74px; scroll-margin-top: 88px; }
    .section-kicker { color: var(--text-muted); font-size: 0.84rem; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; margin: 0 0 8px; }
    .section-title { font-size: clamp(1.72rem, 3.2vw, 2.2rem); line-height: 1.2; margin: 0 0 22px; letter-spacing: -0.03em; }
    .section-rule { border-top: 1px solid var(--border); padding-top: 28px; }

    .hero { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 42px; align-items: start; border-bottom: 1px solid var(--border); padding-bottom: 56px; }
    .eyebrow { display: inline-flex; align-items: center; border-radius: 999px; background: var(--yellow); color: var(--text); padding: 6px 12px; font-size: 0.82rem; font-weight: 850; margin-bottom: 18px; }
    h1 { font-size: clamp(2.15rem, 5.3vw, 3.25rem); line-height: 1.06; letter-spacing: -0.055em; margin: 0; }
    .subtitle { color: var(--text-soft); font-size: clamp(1.06rem, 2vw, 1.22rem); margin: 12px 0 18px; max-width: 46rem; }
    .bio { font-size: 1.02rem; margin: 0 0 22px; max-width: 48rem; }
    .button-row { display: flex; flex-wrap: wrap; gap: 10px; }
    .button { display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; border: 1px solid var(--border); padding: 10px 15px; color: var(--text); background: var(--white); font-size: 0.9rem; font-weight: 850; text-decoration: none; }
    .button.primary { background: var(--yellow); border-color: var(--yellow); }
    .button:hover { color: var(--text); background: var(--yellow); text-decoration: none; }

    .profile-block { border-top: 6px solid var(--yellow); padding-top: 18px; }
    .profile-placeholder {
      aspect-ratio: 1 / 1;
      border-radius: 18px;
      background: linear-gradient(135deg, var(--yellow), var(--pink) 48%, var(--blue));
      display: grid;
      place-items: center;
      color: var(--text);
      font-size: 4rem;
      font-weight: 900;
      letter-spacing: -0.08em;
      margin-bottom: 16px;
    }
    .profile-meta { color: var(--text-soft); font-size: 0.94rem; }
    .profile-meta strong { display: block; color: var(--text); font-size: 1.05rem; margin-bottom: 4px; }

    .news-list { border-top: 1px solid var(--border); }
    .news-item { display: grid; grid-template-columns: 108px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--border); }
    .news-date { color: var(--text-muted); font-weight: 850; font-size: 0.9rem; }

    .interest-grid { display: flex; flex-wrap: wrap; gap: 10px; }
    .tag { display: inline-flex; align-items: center; border-radius: 999px; background: var(--white); border: 1px solid var(--border); padding: 9px 13px; color: var(--text); font-weight: 850; }
    .tag.yellow { background: rgba(255, 213, 0, 0.35); }
    .tag.blue { background: rgba(36, 140, 255, 0.12); color: #1458a3; }
    .tag.purple { background: rgba(108, 85, 240, 0.12); color: #4832c5; }
    .tag.orange { background: rgba(255, 166, 70, 0.18); color: #9a4c00; }

    .projects { border-top: 1px solid var(--border); }
    .project-row { display: grid; grid-template-columns: 300px 1fr; gap: 28px; padding: 26px 0; border-bottom: 1px solid var(--border); }
    .project-media { aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: var(--beige); display: grid; place-items: center; color: var(--text); font-weight: 900; text-align: center; padding: 18px; }
    .project-media img, .project-media iframe { width: 100%; height: 100%; object-fit: cover; display: block; border: 0; }
    .project-media.video { padding: 0; background: #151b17; }
    .project-media.blue { background: linear-gradient(135deg, rgba(36, 140, 255, 0.45), rgba(178, 255, 83, 0.62)); }
    .project-media.purple { background: linear-gradient(135deg, rgba(108, 85, 240, 0.36), rgba(255, 168, 226, 0.72)); }
    .project-venue { color: var(--text-muted); font-size: 0.9rem; font-weight: 850; margin: 0 0 4px; }
    .project-row h3 { font-size: clamp(1.16rem, 2.2vw, 1.42rem); line-height: 1.24; margin: 0 0 7px; letter-spacing: -0.025em; }
    .authors { color: var(--text-soft); font-size: 0.95rem; margin: 0 0 9px; }
    .description { margin: 0 0 14px; }
    .link-row { display: flex; flex-wrap: wrap; gap: 9px; }
    .project-link { border-radius: 999px; background: var(--white); border: 1px solid var(--border); color: var(--text); padding: 7px 12px; font-size: 0.84rem; font-weight: 850; text-decoration: none; }
    .project-link:hover { background: var(--yellow); color: var(--text); text-decoration: none; }
    .project-publication-note { color: var(--text-soft); margin: 18px 0 0; }

    .contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; border-top: 1px solid var(--border); padding-top: 24px; }
    .contact-block h3 { margin: 0 0 8px; font-size: 1.05rem; }
    .contact-block p { margin: 0; color: var(--text-soft); }

    footer { background: var(--text); color: var(--white); padding: 34px 0; margin-top: 34px; }
    footer a { color: var(--yellow); }
    .footer-inner { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; color: rgba(255,255,255,0.78); font-size: 0.92rem; }

    @media (max-width: 860px) {
      .hero, .project-row, .contact-grid { grid-template-columns: 1fr; }
      .profile-block { max-width: 360px; }
      main { padding-top: 34px; }
      section { margin-bottom: 58px; }
    }
    @media (max-width: 560px) {
      .container { padding: 0 18px; }
      .nav { align-items: flex-start; flex-direction: column; padding: 14px 0; }
      .nav-links { justify-content: flex-start; }
      .news-item { grid-template-columns: 1fr; gap: 4px; }
    }