body { display: flex; flex-direction: column; min-height: 100vh; }
    main { flex: 1; padding-top: calc(var(--nav-h) + 56px); padding-bottom: 96px; }

    /* ── ページヘッダー ── */
    .page-header { margin-bottom: 56px; }
    .page-header-inner { display: flex; flex-direction: column; gap: 20px; }
    .page-eyebrow { display: flex; align-items: center; gap: 14px; }
    .page-eyebrow-line { width: 32px; height: 1px; background: var(--accent-blue); opacity: 0.6; }
    .page-eyebrow-text { font-family: var(--font-mono); font-size: 0.60rem; color: var(--accent-teal); letter-spacing: 0.28em; text-transform: uppercase; }
    .page-desc { font-size: 0.88rem; color: var(--text-1); line-height: 1.85; max-width: 560px; }

    /* ── ドア遷移アニメーション ── */
    .page-enter {
      animation: pageEnter 0.7s var(--ease-out) both;
    }

    @keyframes pageEnter {
      from { opacity: 0; transform: translateX(24px); }
      to   { opacity: 1; transform: translateX(0); }
    }

    /* ── プロフィールヒーロー ── */
    .profile-hero {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--r-2xl);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      padding: clamp(28px, 5vw, 52px);
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 36px;
      align-items: center;
      margin-bottom: 24px;
      position: relative;
      overflow: hidden;
      transition: border-color var(--t), box-shadow var(--t), transform var(--t) var(--ease);
    }

    .profile-hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--accent-blue), var(--accent-teal), transparent);
      border-radius: var(--r-2xl) var(--r-2xl) 0 0;
    }

    .profile-hero::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(59,158,255,0.03) 0%, transparent 60%);
      border-radius: inherit;
      pointer-events: none;
    }

    .profile-hero:hover {
      border-color: var(--border-m);
      box-shadow: 0 20px 56px rgba(59,158,255,0.10);
      transform: translateY(-2px);
    }

    /* アバター */
    .profile-avatar-wrap { position: relative; flex-shrink: 0; }

    .profile-avatar {
      width: clamp(80px, 12vw, 108px);
      height: clamp(80px, 12vw, 108px);
      border-radius: 50%;
      overflow: hidden;
      border: 2px solid transparent;
      background:
        linear-gradient(var(--bg-1), var(--bg-1)) padding-box,
        linear-gradient(135deg, var(--accent-blue), var(--accent-teal)) border-box;
      box-shadow: 0 0 36px rgba(59,158,255,0.22);
    }

    .profile-avatar img { width: 100%; height: 100%; object-fit: cover; }

    .profile-status {
      position: absolute;
      bottom: 2px; right: 2px;
      width: 14px; height: 14px;
      border-radius: 50%;
      background: var(--accent-teal);
      border: 2px solid var(--bg-0);
      box-shadow: 0 0 8px rgba(0,229,184,0.5);
      animation: statusPulse 2.5s ease-in-out infinite;
    }

    @keyframes statusPulse {
      0%,100%{ box-shadow: 0 0 8px rgba(0,229,184,0.5); }
      50%     { box-shadow: 0 0 16px rgba(0,229,184,0.8); }
    }

    /* プロフィール情報 */
    .profile-info { min-width: 0; }

    .profile-name {
      font-family: var(--font-display);
      font-size: clamp(1.6rem, 4vw, 2.2rem);
      font-weight: 800;
      letter-spacing: -0.03em;
      color: var(--text-0);
      line-height: 1.1;
      margin-bottom: 4px;
    }

    .profile-handle {
      font-family: var(--font-mono);
      font-size: 0.72rem;
      color: var(--accent-blue);
      letter-spacing: 0.08em;
      margin-bottom: 16px;
    }

    .profile-role {
      font-size: 0.82rem;
      color: var(--text-1);
      line-height: 1.75;
      margin-bottom: 18px;
      max-width: 500px;
    }

    .profile-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
    }

    .profile-tag {
      font-family: var(--font-mono);
      font-size: 0.58rem;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      padding: 5px 12px;
      border-radius: 99px;
      border: 1px solid var(--border-m);
      color: var(--text-1);
      background: rgba(59,158,255,0.04);
      transition: border-color var(--t), color var(--t), transform var(--t) var(--ease-spring);
      cursor: default;
    }

    .profile-tag:hover {
      border-color: var(--accent-blue);
      color: var(--accent-blue);
      transform: translateY(-1px);
    }

    /* ── 2カラムグリッド ── */
    .info-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

    /* ── カード共通 ── */
    .about-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--r-xl);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      padding: 28px 30px;
      position: relative;
      overflow: hidden;
      transition: border-color var(--t), box-shadow var(--t), transform var(--t) var(--ease);
    }

    .about-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 1px;
      opacity: 0;
      transition: opacity var(--t);
    }

    .about-card.accent-blue::before  { background: linear-gradient(90deg, transparent, var(--accent-blue), transparent); }
    .about-card.accent-teal::before  { background: linear-gradient(90deg, transparent, var(--accent-teal), transparent); }
    .about-card.accent-purple::before{ background: linear-gradient(90deg, transparent, var(--accent-purple), transparent); }

    .about-card:hover {
      border-color: var(--border-m);
      box-shadow: 0 14px 40px rgba(0,0,0,0.28);
      transform: translateY(-3px);
    }

    .about-card:hover::before { opacity: 0.6; }

    .card-heading {
      font-family: var(--font-display);
      font-size: 0.95rem;
      font-weight: 800;
      letter-spacing: -0.01em;
      color: var(--text-0);
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .card-heading-bar {
      width: 4px; height: 16px;
      border-radius: 99px;
      flex-shrink: 0;
    }

    .card-heading-bar.blue   { background: linear-gradient(to bottom, var(--accent-blue), var(--accent-teal)); }
    .card-heading-bar.teal   { background: linear-gradient(to bottom, var(--accent-teal), var(--accent-blue)); }
    .card-heading-bar.purple { background: linear-gradient(to bottom, var(--accent-purple), var(--accent-blue)); }
    .card-heading-bar.amber  { background: linear-gradient(to bottom, var(--accent-amber), var(--accent-purple)); }

    /* インフォテーブル */
    .info-table { display: flex; flex-direction: column; gap: 11px; }

    .info-row {
      display: flex;
      gap: 14px;
      font-size: 0.84rem;
      align-items: flex-start;
    }

    .info-key {
      font-family: var(--font-mono);
      font-size: 0.60rem;
      color: var(--accent-teal);
      letter-spacing: 0.12em;
      text-transform: uppercase;
      white-space: nowrap;
      padding-top: 2px;
      min-width: 80px;
      flex-shrink: 0;
    }

    .info-val {
      color: var(--text-1);
      line-height: 1.75;
    }

    .info-val a {
      color: var(--accent-blue);
      text-decoration: none;
      transition: color var(--t);
    }

    .info-val a:hover { color: var(--accent-teal); }

    /* ── スキルセクション ── */
    .skills-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }

    .skill-item {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .skill-name {
      font-family: var(--font-mono);
      font-size: 0.60rem;
      color: var(--text-1);
      letter-spacing: 0.09em;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .skill-level {
      font-size: 0.52rem;
      color: var(--text-2);
    }

    .skill-bar {
      height: 3px;
      background: var(--border);
      border-radius: 99px;
      overflow: hidden;
    }

    .skill-bar-fill {
      height: 100%;
      border-radius: 99px;
      transition: width 1s var(--ease-out);
    }

    /* ── 活動歴タイムライン ── */
    .timeline-list { display: flex; flex-direction: column; gap: 0; }

    .timeline-item {
      display: grid;
      grid-template-columns: 80px 1fr;
      gap: 16px;
      padding: 14px 0;
      border-bottom: 1px solid var(--border);
      position: relative;
    }

    .timeline-item:last-child { border-bottom: none; }

    .timeline-year {
      font-family: var(--font-mono);
      font-size: 0.65rem;
      color: var(--accent-teal);
      letter-spacing: 0.10em;
      padding-top: 2px;
      white-space: nowrap;
    }

    .timeline-content { min-width: 0; }

    .timeline-title {
      font-family: var(--font-display);
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-0);
      margin-bottom: 3px;
      line-height: 1.3;
    }

    .timeline-desc {
      font-size: 0.76rem;
      color: var(--text-1);
      line-height: 1.68;
    }

    .timeline-badge {
      display: inline-block;
      font-family: var(--font-mono);
      font-size: 0.50rem;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      padding: 2px 7px;
      border-radius: 4px;
      margin-top: 5px;
      border: 1px solid;
    }

    .timeline-badge.web  { color: var(--accent-blue);   border-color: rgba(59,158,255,0.28);  background: rgba(59,158,255,0.05); }
    .timeline-badge.quiz { color: var(--accent-purple); border-color: rgba(139,114,255,0.28); background: rgba(139,114,255,0.05); }
    .timeline-badge.astro{ color: var(--accent-teal);   border-color: rgba(0,229,184,0.28);   background: rgba(0,229,184,0.05); }

    /* ── SNSリンク ── */
    .sns-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 10px;
    }

    .sns-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 14px 16px;
      border-radius: var(--r-md);
      border: 1px solid var(--border);
      background: transparent;
      text-decoration: none;
      color: var(--text-1);
      transition:
        border-color var(--t),
        background var(--t),
        color var(--t),
        transform var(--t) var(--ease-spring);
      min-height: 52px;
    }

    .sns-link:hover {
      border-color: var(--border-m);
      background: rgba(59,158,255,0.04);
      color: var(--text-0);
      transform: translateX(3px);
    }

    .sns-link-icon {
      width: 32px; height: 32px;
      border-radius: var(--r-sm);
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
      border: 1px solid var(--border);
    }

    .sns-link-icon svg { width: 16px; height: 16px; }

    .sns-link-body { min-width: 0; }

    .sns-link-handle {
      font-family: var(--font-mono);
      font-size: 0.65rem;
      color: var(--accent-blue);
      letter-spacing: 0.06em;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .sns-link-desc {
      font-family: var(--font-mono);
      font-size: 0.54rem;
      color: var(--text-2);
      letter-spacing: 0.06em;
    }

    .sns-link-arrow {
      margin-left: auto;
      color: var(--text-2);
      transition: color var(--t), transform var(--t) var(--ease-spring);
      flex-shrink: 0;
    }

    .sns-link:hover .sns-link-arrow {
      color: var(--accent-blue);
      transform: translateX(3px);
    }

    .sns-link-arrow svg { width: 14px; height: 14px; }

    /* ── 運営方針カード ── */
    .policy-text {
      font-size: 0.86rem;
      color: var(--text-1);
      line-height: 2.0;
    }

    /* ── 全幅カード ── */
    .about-card.full { margin-bottom: 20px; }

    /* ── 戻るリンク ── */
    .back-to-lab {
      display: inline-flex; align-items: center; gap: 10px;
      font-family: var(--font-mono); font-size: 0.62rem;
      color: var(--text-2); letter-spacing: 0.14em;
      text-transform: uppercase; text-decoration: none;
      transition: color var(--t); margin-top: 56px;
    }

    .back-to-lab:hover { color: var(--accent-blue); }
    .back-to-lab svg { width: 14px; height: 14px; transform: rotate(180deg); }

    /* ── レスポンシブ ── */
    @media (max-width: 860px) {
      .info-grid { grid-template-columns: 1fr; }
      .skills-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 640px) {
      main { padding-top: calc(var(--nav-h) + 36px); }
      .profile-hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 20px;
      }
      .profile-avatar-wrap { margin: 0 auto; }
      .profile-tags { justify-content: center; }
      .profile-role { margin: 0 auto 18px; }
      .info-row { flex-direction: column; gap: 4px; }
      .info-key { min-width: unset; }
      .timeline-item { grid-template-columns: 64px 1fr; gap: 10px; }
      .sns-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 480px) {
      .skills-grid { grid-template-columns: 1fr; }
      .about-card { padding: 20px; }
    }