:root {
      --blue: #0070FF;
      --bg: #0070FF;
      --fg: #ffffff;
      --mono: Menlo, Consolas, "Courier New", monospace;
      --green: #80ff80;
      --grain: 1.2;
      --pad-x: 16px;
    }

    * {
      box-sizing: border-box;
    }

    html,
    body {
      margin: 0;
      padding: 0;
      height: 100%;
      background: var(--bg);
      color: var(--fg);
      font-family: var(--mono);
      font-size: 16px;
      line-height: 1.5;
      letter-spacing: normal;
      cursor: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiI+CjxjaXJjbGUgY3g9IjgiIGN5PSI4IiByPSI0IiBmaWxsPSJ3aGl0ZSIvPgo8L3N2Zz4=") 8 8, auto;
    }

    body {
      position: relative;
      min-height: 100vh;
      overflow: hidden;
    }

    body [lang="ja"] {
      font-family: "Yu Gothic", "YuGothic", "Yu Gothic UI", sans-serif;
    }

    /* wave overlay */
    #app {
      position: fixed;
      inset: 0;
      z-index: 50;
      pointer-events: none;
    }

    .frame {
      position: relative;
      min-height: 100vh;
    }

    /* vertical lines */
    .vline {
      position: fixed;
      top: 0;
      bottom: 0;
      width: 1px;
      background: var(--fg);
      pointer-events: none;
      z-index: 10;
    }
    .vline--1 { left: 240px; }
    .vline--2 { left: 720px; }
    .vline--3 { left: 1440px; }

    /* M column */
    .col-m {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: 240px;
      background: var(--blue);
      color: #ffffff;
      z-index: 2;
      overflow-y: auto;
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    .col-m::-webkit-scrollbar {
      display: none;
    }

    .m-1-logo {
      width: 240px;
      height: 240px;
      border-bottom: 1px solid #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    .m-1-logo img {
      max-width: 200px;
      max-height: 200px;
      display: block;
    }

    .m-2-menu {
      width: 240px;
      padding: 16px var(--pad-x) 24px var(--pad-x);
      font-size: 16px;
      line-height: 1.6;
      white-space: normal;
      word-break: break-word;
    }
    .menu-line {
      display: block;
    }
    .menu-lead-nami {
      font-size: 24px;
      line-height: 1.4;
    }
    .menu-lead-step {
      font-size: 20px;
      line-height: 1.4;
    }
    .menu-label--projects,
    .menu-label--books {
      color: #000000;
    }
    .spacer-line {
      display: block;
      height: 1.6em;
    }

    .hover-item {
      cursor: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiI+CjxsaW5lIHgxPSI4IiB5MT0iMiIgeDI9IjgiIHkyPSIxNCIgc3Ryb2tlPSJ3aGl0ZSIgc3Ryb2tlLXdpZHRoPSIyIiBzdHJva2UtbGluZWNhcD0icm91bmQiLz4KPGxpbmUgeDE9IjIiIHkxPSI4IiB4Mj0iMTQiIHkyPSI4IiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjIiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIvPgo8L3N2Zz4=") 8 8, auto;
    }
    .hover-item:hover,
    .hover-item.is-linked {
      color: var(--green);
    }

    a {
      color: inherit;
      text-decoration: none;
    }
    a:hover {
      text-decoration: none;
    }

    /* A column (desktop) */
    .col-a {
      position: fixed;
      top: 0;
      left: 240px;
      bottom: 0;
      width: 480px;
      padding-bottom: 72px;
      z-index: 3;
      font-size: 16px;
      overflow-y: auto;
    }

    .a-1-box {
      height: 240px;
      padding-top: 16px;
      border-bottom: 1px solid var(--fg);
      font-size: 16px;
      line-height: 1.6;
      white-space: pre-line;
      background: var(--bg);
    }
    .a-1-inner {
      padding: 0 var(--pad-x);
    }

    .a-2-wrapper {
      position: relative;
      padding: 16px var(--pad-x) 16px var(--pad-x);
      border-bottom: 1px solid var(--fg);
    }
    .a-2-structure {
      margin: 0;
    }
    .a-2-structure-img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    .a-2-overlay {
      position: absolute;
      inset: 0;
      padding: 12px var(--pad-x);
      box-sizing: border-box;
      background: transparent;
      border: 0 solid transparent;
      pointer-events: none;
      opacity: 0;
    }
    .a-2-overlay-text {
      position: absolute;
      top: 12px;
      left: var(--pad-x);
      color: var(--green);
      font-size: 16px;
      line-height: 1.4;
    }
    .a-2-wrapper:hover .a-2-overlay {
      opacity: 1;
      border-width: 4px;
      border-color: var(--green);
    }

    /* B column */
    .col-b {
      position: fixed;
      top: 0;
      left: 720px;
      bottom: 0;
      width: 720px;
      z-index: 3;
      overflow-y: auto;
      margin: 0;
    }

    .b-card {
      position: relative;
      margin: 0;
      padding: 0;
      cursor: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiI+CjxsaW5lIHgxPSI4IiB5MT0iMiIgeDI9IjgiIHkyPSIxNCIgc3Ryb2tlPSJ3aGl0ZSIgc3Ryb2tlLXdpZHRoPSIyIiBzdHJva2UtbGluZWNhcD0icm91bmQiLz4KPGxpbmUgeDE9IjIiIHkxPSI4IiB4Mj0iMTQiIHkyPSI4IiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjIiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIvPgo8L3N2Zz4=") 8 8, auto;
      border-top: 1px solid var(--fg);
    }
    .b-card:first-child {
      border-top: none;
    }
    .b-card + .b-card {
      margin-top: 0;
    }
    .b-card:last-child {
      border-bottom: 1px solid var(--fg);
    }

    .b-card-img {
      display: block;
      width: 100%;
      height: auto;
    }
    .b-card--fixed .b-card-img {
      aspect-ratio: 3 / 2;
      object-fit: cover;
    }
    .b-card--grow .b-card-img {
      width: 100%;
      height: auto;
      max-width: 100%;
    }

    .b-card-overlay {
      position: absolute;
      inset: 0;
      padding: 12px var(--pad-x);
      box-sizing: border-box;
      background: transparent;
      border: 0 solid transparent;
      pointer-events: none;
      opacity: 0;
    }
    .b-card-overlay-text {
      position: absolute;
      top: 12px;
      left: var(--pad-x);
      color: var(--green);
      font-size: 16px;
      line-height: 1.4;
    }

    .b-card:hover .b-card-overlay {
      opacity: 1;
      border-width: 4px;
      border-color: var(--green);
    }

    /* M-3: publications + info inside M (PC用) */
    .m3-in-m {
      margin-top: 0;
    }

    /* B 列の後ろに置く publications ブロック（スマホ用コピー） */
    .col-m3 {
      display: none;
    }

    /* 720〜1440px: A/B の幅を比率で縮小 */
    @media (max-width: 1440px) and (min-width: 720px) {
      .col-a {
        left: 240px;
        width: calc((100vw - 240px) * 0.4);
      }
      .a-1-box {
        height: auto;
        min-height: 240px;
      }
      .col-b {
        left: calc(240px + (100vw - 240px) * 0.4);
        width: calc((100vw - 240px) * 0.6);
      }
      .b-card-img,
      .b-card--grow .b-card-img {
        width: 100%;
        max-width: 100%;
        height: auto;
      }
      .vline--2 {
        left: calc(240px + (100vw - 240px) * 0.4);
      }
      .vline--3 {
        left: 100vw;
      }
    }

    /* 1440px以上: A/B の最大幅を制御（A max 640, B max 1280） */
    @media (min-width: 1440px) {
      .col-a {
        left: 240px;
        width: clamp(480px, (100vw - 240px) * 0.4, 640px);
      }
      .col-b {
        left: calc(240px + clamp(480px, (100vw - 240px) * 0.4, 640px));
        width: clamp(720px, (100vw - 240px) * 0.6, 1280px);
      }
      .b-card-img,
      .b-card--grow .b-card-img {
        width: 100%;
        max-width: 100%;
        height: auto;
      }
      .vline--2 {
        left: calc(240px + clamp(480px, (100vw - 240px) * 0.4, 640px));
      }
      .vline--3 {
        left: calc(
          240px
          + clamp(480px, (100vw - 240px) * 0.4, 640px)
          + clamp(720px, (100vw - 240px) * 0.6, 1280px)
        );
      }
    }

    /* <=720px: 縦積みレイアウト（スマホ） */
    @media (max-width: 720px) {
      body {
        overflow-y: auto;
      }
      .vline--1,
      .vline--2,
      .vline--3 {
        display: none;
      }
      .col-m {
        position: relative;
        width: 100%;
        height: auto;
        overflow: visible;
        border-bottom: 1px solid #ffffff; /* M-2の下辺 = A-1の上辺 */
      }
      .m-1-logo,
      .m-2-menu {
        width: 100%;
      }

      .col-a {
        position: relative;
        top: auto;
        left: auto;
        bottom: auto;
        margin-left: 0;
        width: 100%;
        padding: 0;
        height: auto;
        overflow: visible;
      }
      .a-1-box {
        height: auto;
      }

      .col-b {
        position: relative;
        top: 0;
        left: 0;
        bottom: auto;
        width: 100%;
        height: auto;
        overflow: visible;
        margin: 0;
      }
      .b-card-img,
      .b-card--grow .b-card-img {
        width: 100%;
        max-width: 100%;
        height: auto;
      }

      /* スマホでは M 内の M-3 を非表示 */
      .m3-in-m {
        display: none;
      }

      /* B 列の後ろの M-3 コピーを表示 */
      .col-m3 {
        display: block;
        width: 100%;
        border-top: 1px solid #ffffff;
        padding: 16px var(--pad-x) 32px var(--pad-x);
      }
      .b-card:last-child {
        border-bottom: none;
      }
    }

    .a-3-wrapper {
      position: relative;
      padding: 16px var(--pad-x) 16px var(--pad-x);
      border-bottom: 1px solid var(--fg);
      background: var(--bg);
    }

    #palindrome-glass-root {
      width: 100%;
      height: 320px;
      overflow: hidden;
    }

    .a-3-overlay {
      position: absolute;
      inset: 0;
      padding: 12px var(--pad-x);
      box-sizing: border-box;
      background: transparent;
      border: 0 solid transparent;
      pointer-events: none;
      opacity: 0;
    }

    .a-3-overlay-text {
      position: absolute;
      top: 12px;
      left: var(--pad-x);
      color: var(--green);
      font-size: 16px;
      line-height: 1.4;
    }

    .a-3-wrapper:hover .a-3-overlay {
      opacity: 1;
      border-width: 4px;
      border-color: var(--green);
    }

/* Hide scrollbars for A/B columns (while keeping scrollable) */
.col-a,
.col-b {
  -ms-overflow-style: none; /* IE/Edge */
  scrollbar-width: none;    /* Firefox */
}

.col-a::-webkit-scrollbar,
.col-b::-webkit-scrollbar {
  display: none;            /* Chrome/Safari */
}