:root {
      --bg: #313c42;
      --panel: #f6f6f6;
      --panel-teal: rgba(57, 194, 181, 0.34);
      --panel-teal-active: rgba(57, 194, 181, 0.52);
      --panel-orange: rgba(191, 122, 8, 0.38);
      --panel-orange-active: rgba(191, 122, 8, 0.56);
      --text: #f3fbfa;
      --orange: #bf7a08;
      --teal: #39c2b5;
      --group: rgba(191, 122, 8, 0.12);
      --shadow: 0 10px 26px rgba(0, 0, 0, 0.18);
      --radius: 16px;
      --ease: 220ms ease;
    }

    * { box-sizing: border-box; }

    html, body {
      margin: 0;
      padding: 0;
      background: var(--bg);
      color: var(--text);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }

    body {
      padding: 28px 16px 16px;
      overflow: hidden;
    }

    .wrap {
      max-width: 1220px;
      margin: 0 auto;
    }

    .matrix {
      display: grid;
      grid-template-columns: minmax(240px, 1.05fr) minmax(240px, 1.05fr) minmax(240px, 1.05fr) 68px;
      grid-template-rows: 82px repeat(4, 86px);
      gap: 18px;
      align-items: stretch;
      position: relative;
    }

    .group-area {
      display: none;
    }

    .box,
    .rail {
      background: var(--panel-teal);
      color: var(--text);
      border-radius: var(--radius);
      box-shadow: var(--shadow), inset 0 0 0 999px rgba(255, 255, 255, 0.05);
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 14px 16px;
      line-height: 1.1;
      position: relative;
      z-index: 1;
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease), opacity var(--ease), background var(--ease);
    }

    .box {
      border: 2px solid var(--teal);
      min-height: 86px;
    }

    .flow,
    .head.flow-head {
      border: 2px solid var(--orange);
      background: var(--panel-orange);
    }

    .head {
      min-height: 82px;
      font-weight: 800;
      font-size: 0.98rem;
    }

    .flow {
      font-weight: 800;
      font-size: 0.96rem;
    }

    .skills,
    .tools {
      font-size: 0.8rem;
      white-space: pre-line;
    }

    button.box {
      width: 100%;
      height: 100%;
      cursor: pointer;
      appearance: none;
      font: inherit;
      color: inherit;
    }

    button.box:hover,
    button.box:focus-visible {
      transform: translateY(-2px);
      box-shadow: 0 14px 26px rgba(0, 0, 0, 0.12);
      outline: none;
    }

    .box.is-active {
      background: var(--panel-teal-active);
      box-shadow: 0 0 0 5px rgba(57, 194, 181, 0.24), 0 18px 34px rgba(0, 0, 0, 0.18);
    }

    .flow.is-active {
      background: var(--panel-orange-active);
      box-shadow: 0 0 0 5px rgba(191, 122, 8, 0.24), 0 18px 34px rgba(0, 0, 0, 0.18);
    }

    .box.is-row-active:not(.is-active) {
      opacity: 1;
      background: rgba(57, 194, 181, 0.44);
    }

    .flow.is-row-active:not(.is-active) {
      background: rgba(191, 122, 8, 0.48);
    }

    .box.is-dimmed {
      opacity: 0.55;
    }

    .rail {
      grid-column: 4;
      grid-row: 2 / 6;
      border: 2px solid var(--teal);
      padding: 8px;
    }

    .rail__text {
      writing-mode: vertical-rl;
      transform: rotate(180deg);
      font-size: 0.82rem;
      line-height: 1.2;
    }

    .head-flow { grid-column: 1; grid-row: 1; }
    .head-skills { grid-column: 2; grid-row: 1; }
    .head-tools { grid-column: 3; grid-row: 1; }

    .flow-synthesis { grid-column: 1; grid-row: 2; }
    .skills-synthesis { grid-column: 2; grid-row: 2; }
    .tools-synthesis { grid-column: 3; grid-row: 2; }

    .flow-physical { grid-column: 1; grid-row: 3; }
    .skills-physical { grid-column: 2; grid-row: 3; }
    .tools-physical { grid-column: 3; grid-row: 3; }

    .flow-ams { grid-column: 1; grid-row: 4; }
    .skills-ams { grid-column: 2; grid-row: 4; }
    .tools-ams { grid-column: 3; grid-row: 4; }

    .flow-gatelevel { grid-column: 1; grid-row: 5; }
    .skills-gatelevel { grid-column: 2; grid-row: 5; }
    .tools-gatelevel { grid-column: 3; grid-row: 5; }

    .detail {
      display: grid;
      grid-template-rows: 0fr;
      opacity: 0;
      margin-top: 0;
      border-radius: 20px;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.1);
      box-shadow: var(--shadow);
      padding: 0 20px;
      overflow: hidden;
      pointer-events: none;
      transition: grid-template-rows 260ms ease, opacity 220ms ease, margin-top 260ms ease, padding 260ms ease;
    }

    .detail.is-visible {
      grid-template-rows: 1fr;
      opacity: 1;
      margin-top: 22px;
      padding: 20px;
      pointer-events: auto;
    }

    .detail__inner {
      min-height: 0;
      overflow: hidden;
    }

    .detail__label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.78rem;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: rgba(243,251,250,0.72);
      margin-bottom: 10px;
    }

    .detail__label::before {
      content: "";
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--teal);
      box-shadow: 0 0 0 7px rgba(57, 194, 181, 0.14);
    }

    .detail__title {
      margin: 0 0 10px;
      font-size: clamp(1.24rem, 2vw, 1.75rem);
      line-height: 1.1;
    }

    .detail__copy {
      margin: 0;
      max-width: 900px;
      line-height: 1.65;
      color: rgba(243,251,250,0.9);
    }

    .detail__tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(57, 194, 181, 0.08);
      border: 1px solid rgba(57, 194, 181, 0.18);
      color: var(--text);
      font-size: 0.9rem;
    }

    @media (max-width: 1100px) {
      .matrix {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
      }

      .group-area {
        display: none;
      }

      .rail,
      .head-flow,
      .head-skills,
      .head-tools,
      .flow-synthesis,
      .skills-synthesis,
      .tools-synthesis,
      .flow-physical,
      .skills-physical,
      .tools-physical,
      .flow-ams,
      .skills-ams,
      .tools-ams,
      .flow-gatelevel,
      .skills-gatelevel,
      .tools-gatelevel {
        grid-column: auto;
        grid-row: auto;
      }

      .rail {
        min-height: 72px;
      }

      .rail__text {
        writing-mode: horizontal-tb;
        transform: none;
      }
    }