@layer base {
  /* TERMINOLOGY BLOCK */
  .terminology-block {
    max-inline-size: 760px;
    padding: 0;
    margin: 0 auto 44px;
    border-block-start: 1px solid var(--border);
    border-block-end: 1px solid var(--border);
  }
  .terminology-row {
    display: grid;
    grid-template-columns: 56px 1fr 2fr;
    gap: 0 20px;
    align-items: baseline;
    padding: 12px 0;
    border-block-end: 1px solid var(--border);
  }
  .terminology-row:last-child {
    border-block-end: none;
  }
  .term-abbr {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.12em;
  }
  .term-expand {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.05em;
  }
  .term-def {
    font-size: 13px;
    line-height: 1.55;
    color: var(--text);
  }
  @media (max-width: 600px) {
    .terminology-row {
      grid-template-rows: auto auto;
      grid-template-columns: 52px 1fr;
      gap: 2px 12px;
    }
    .term-expand {
      grid-column: 2;
    }
    .term-def {
      grid-column: 1 / -1;
      padding-block-start: 4px;
      font-size: 12px;
      color: var(--text-muted);
    }
  }

  /* JARGON TOOLTIP */
  .jargon-tooltip {
    position: relative;
    cursor: help;
    border-block-end: 1px dashed var(--text-muted);
  }
  .jargon-tooltip .tooltip-text {
    position: absolute;
    inset-block-end: calc(100% + 8px);
    inset-inline-start: 50%;
    z-index: 200;
    display: none;
    inline-size: 260px;
    padding: 10px 14px;
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.6;
    color: var(--bg);
    white-space: normal;
    pointer-events: none;
    background: var(--text);
    transform: translateX(-50%);
  }
  .jargon-tooltip .tooltip-text.wide {
    inline-size: 300px;
  }
  .jargon-tooltip .tooltip-abbr {
    display: block;
    margin-block-end: 5px;
    font-size: 9px;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.15em;
  }
  .jargon-tooltip:hover .tooltip-text,
  .jargon-tooltip.tip-open .tooltip-text {
    display: block;
  }
  @media (hover: none) {
    .jargon-tooltip {
      cursor: pointer;
    }
  }

  /* EXPLORE BUTTON */
  .explore-btn {
    display: inline-flex;
    gap: 7px;
    align-items: center;
    padding: 8px 16px;
    margin-block-start: 16px;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    cursor: pointer;
    background: none;
    border: 1px solid var(--accent);
    transition: all 0.2s;
  }
  .explore-btn:hover {
    color: var(--bg);
    background: var(--accent);
  }
  .explore-btn svg {
    inline-size: 13px;
    block-size: 13px;
  }

  /* CLIFFHANGER */
  .cliffhanger-section {
    background: var(--surface);
  }

  /* Closing question: big centered pull-quote treatment */
  .closing-question {
    max-inline-size: 760px;
    padding: 48px 40px;
    margin: 56px auto 0;
    text-align: center;
    border-block-start: 2px solid var(--border);
  }
  .closing-question-label {
    margin-block-end: 28px;
    font-family: var(--mono);
    font-size: 9px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.3em;
  }
  .closing-question-text {
    margin-block-end: 0;
    font-family: var(--sans);
    font-size: clamp(20px, 3vw, 30px);
    font-weight: 700;
    line-height: 1.25;
    color: var(--text);
  }
  .closing-question-text .cq-highlight {
    color: var(--accent);
  }
  .closing-question-text .cq-warning {
    color: var(--violet);
  }
  .closing-question-text .cq-gold {
    color: var(--gold-dim);
  }
  @media (max-width: 600px) {
    .closing-question {
      padding: 36px 20px;
    }
    .closing-question-text {
      font-size: 19px;
    }
  }

  /* FOOTER */
  .post-footer {
    padding: 40px 32px;
    text-align: center;
    background: var(--surface);
    border-block-start: 1px solid var(--border);
  }
  .navigation-data {
    margin-block-end: 8px;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--gold-dim);
    text-transform: uppercase;
    letter-spacing: 0.2em;
  }
  .navigation-summary {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text-dim);
  }

  /* RESPONSIVE */
  @media (max-width: 700px) {
    section {
      padding: 48px 20px;
    }
    .tempo-jo {
      padding-block-start: 56px;
      padding-block-end: 56px;
    }
    .tempo-ha {
      padding-block-start: 44px;
      padding-block-end: 44px;
    }
    .tempo-kyu {
      padding-block-start: 36px;
      padding-block-end: 36px;
    }
    .hero {
      padding: 80px 20px 60px;
    }
    .hero h1 {
      font-size: clamp(28px, 8vw, 42px);
    }
    .hero-sub {
      font-size: 14px;
    }
    .principle-grid {
      grid-template-columns: 1fr;
    }
    .crossbar-domains {
      flex-direction: column;
      gap: 0;
    }
    .crossbar-bridge {
      padding: 4px 0;
      transform: rotate(90deg);
    }
    .terminal-block {
      padding: 16px 14px;
      font-size: 11px;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }
    .terminal-block div {
      white-space: nowrap;
    }
    .case-study {
      padding: 20px 18px 16px;
    }
    .callout {
      padding: 18px 20px;
    }
    .crossbar-block {
      padding: 20px;
    }
    .canvas-section canvas {
      block-size: 200px;
    }
    .explore-btn {
      justify-content: center;
      inline-size: 100%;
      min-block-size: 44px;
      padding: 12px 18px;
    }
    .jargon-tooltip .tooltip-text {
      inset-inline-start: 0;
      inline-size: min(220px, 80vw);
      transform: none;
    }
    code {
      word-break: break-all;
    }
    h2 {
      font-size: 20px;
    }
  }
  @media (max-width: 400px) {
    .hero h1 {
      font-size: 26px;
    }
    .terminal-block {
      font-size: 10px;
    }
  }
}