:root, [data-theme="light"] {
      --primary: #be6e34;
      --primary-dark: #6d2c0f;
      --accent: #d0704d;
      --bg: #fafaf8;
      --text: #2d2d2d;
      --text-light: #555;
      --code-bg: #f0ede8;
      --border: #e0dcd4;
      --white: #fff;
      --hero-bg: #6d2c0f;
      --table-header-bg: #f0ede8;
      --max-width: 860px;
    }

    [data-theme="dark"] {
      --primary: #d4894e;
      --primary-dark: #e0a06a;
      --accent: #d0704d;
      --bg: #1a1a1a;
      --text: #e0e0e0;
      --text-light: #aaa;
      --code-bg: #2a2a2a;
      --border: #3a3a3a;
      --white: #fff;
      --hero-bg: #2c1608;
      --table-header-bg: #2a2a2a;
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }

    body {
      font-family: "Source Code Pro", "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      color: var(--text);
      background: var(--bg);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    /* Page header (replaces the old in-hero h1). */
    .page-header {
      max-width: var(--max-width);
      margin: 0 auto 1.5rem;
      padding: 0.5rem 0 0.85rem;
      border-bottom: 1px solid var(--border);
    }

    .page-header h1 {
      font-size: 1.6rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--primary-dark);
    }

    .page-header h1 .page-header-sub {
      font-weight: 400;
      font-size: 1rem;
      opacity: 0.65;
      margin-left: 0.5rem;
    }

    /* Hash-anchor headings shouldn't slide under the floating top bar
       when scrolled into view — give them breathing room. */
    [id^="flag-"], #pyramid, #info, #plan, #test-image,
    #cli-generator, #pyramid-base-setup {
      scroll-margin-top: calc(var(--topbar-height, 3.4rem) + 0.5rem);
    }

    /* Main content */
    main {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 2.5rem 1.5rem 4rem;
    }

    section { margin-bottom: 2.5rem; }

    h2 {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 0.75rem;
      padding-bottom: 0.35rem;
      border-bottom: 2px solid var(--border);
    }

    h3 {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text);
      margin: 1.5rem 0 0.5rem;
    }

    h4 {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--primary-dark);
      margin: 1.25rem 0 0.35rem;
    }

    p { margin-bottom: 0.75rem; color: var(--text-light); }

    /* Man page section header styling */
    .man-section {
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--text);
      margin-bottom: 0.5rem;
      margin-top: 2rem;
    }

    .man-section:first-child { margin-top: 0; }

    /* Flag definition list */
    dl.flags {
      margin: 0 0 1rem 0;
    }

    dl.flags dt {
      font-weight: 600;
      color: var(--text);
      margin-top: 1rem;
      padding: 0.25rem 0;
    }

    dl.flags dt code {
      background: var(--code-bg);
      padding: 0.15rem 0.4rem;
      border-radius: 3px;
      font-size: 0.9rem;
      color: var(--primary-dark);
    }

    dl.flags dd {
      margin-left: 1.5rem;
      color: var(--text-light);
      margin-bottom: 0.25rem;
    }

    dl.flags dd p { margin-bottom: 0.35rem; }

    .default-val { font-size: 0.85rem; color: var(--text-light); }

    /* Tables */
    table {
      width: 100%;
      border-collapse: collapse;
      margin-bottom: 0.75rem;
      font-size: 0.9rem;
    }

    th, td {
      text-align: left;
      padding: 0.5rem 0.75rem;
      border-bottom: 1px solid var(--border);
    }

    th {
      font-weight: 600;
      color: var(--primary-dark);
      background: var(--code-bg);
    }

    td code {
      background: var(--code-bg);
      padding: 0.1rem 0.35rem;
      border-radius: 3px;
      font-size: 0.85rem;
    }

    /* Code blocks */
    .code-wrap {
      position: relative;
      margin-bottom: 0.75rem;
    }

    .code-wrap .copy-btn {
      position: absolute;
      bottom: 0.5rem;
      right: 0.5rem;
      background: var(--border);
      border: none;
      border-radius: 4px;
      padding: 0.3rem 0.5rem;
      cursor: pointer;
      font-size: 0.75rem;
      font-family: inherit;
      color: var(--text-light);
      opacity: 0;
      transition: opacity 0.2s;
    }

    .code-wrap:hover .copy-btn { opacity: 1; }
    .code-wrap .copy-btn:hover { background: var(--primary); color: var(--white); }

    pre {
      background: var(--code-bg);
      color: var(--text);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 1rem 1.25rem;
      overflow-x: auto;
      font-size: 0.85rem;
      line-height: 1.5;
      margin-bottom: 0;
    }

    code {
      font-family: "Source Code Pro", "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
    }

    /* Inline code in paragraphs */
    p code, dd code, li code {
      background: var(--code-bg);
      padding: 0.1rem 0.35rem;
      border-radius: 3px;
      font-size: 0.85rem;
    }

    /* Syntax highlighting */
    .sh-prompt { color: #8c8fa1; user-select: none; }
    .sh-flag { color: #8839ef; }
    .sh-value { color: #40a02b; }
    .sh-cmd { color: #1e66f5; }
    .sh-comment { color: #8c8fa1; font-style: italic; }
    .sh-output { color: #8c8fa1; }

    [data-theme="dark"] .sh-prompt { color: #7f848e; }
    [data-theme="dark"] .sh-flag { color: #c678dd; }
    [data-theme="dark"] .sh-value { color: #98c379; }
    [data-theme="dark"] .sh-cmd { color: #61afef; }
    [data-theme="dark"] .sh-comment { color: #7f848e; }
    [data-theme="dark"] .sh-output { color: #7f848e; }

    /* Rust syntax highlighting (token classes match the shell palette) */
    .r-keyword  { color: #8839ef; }
    .r-type     { color: #1e66f5; }
    .r-string   { color: #40a02b; }
    .r-number   { color: #40a02b; }
    .r-macro    { color: #d0704d; }
    .r-attr     { color: #8c8fa1; }
    .r-comment  { color: #8c8fa1; font-style: italic; }
    .r-lifetime { color: #d0704d; font-style: italic; }

    [data-theme="dark"] .r-keyword  { color: #c678dd; }
    [data-theme="dark"] .r-type     { color: #61afef; }
    [data-theme="dark"] .r-string   { color: #98c379; }
    [data-theme="dark"] .r-number   { color: #98c379; }
    [data-theme="dark"] .r-macro    { color: #e5c07b; }
    [data-theme="dark"] .r-attr     { color: #7f848e; }
    [data-theme="dark"] .r-comment  { color: #7f848e; }
    [data-theme="dark"] .r-lifetime { color: #e5c07b; }

    /* How-to info bubble — sits at the top of <main>, auto-collapses. */
    .info-bubble {
      position: relative;
      display: flex;
      align-items: flex-start;
      gap: 0.85rem;
      margin: 0 0 1.75rem;
      padding: 0.85rem 1rem 0.85rem 0.85rem;
      background: var(--code-bg);
      border: 1px solid var(--border);
      border-left: 4px solid var(--primary);
      border-radius: 6px;
      transition: padding 0.35s ease, margin 0.35s ease;
      overflow: hidden;
    }

    .info-bubble[data-state="closed"] {
      padding: 0.4rem 0.6rem;
      margin-bottom: 1rem;
      align-items: center;
    }

    .info-bubble[data-state="closed"] .info-bubble-body { display: none; }

    .info-bubble-icon {
      flex-shrink: 0;
      width: 1.7rem;
      height: 1.7rem;
      border-radius: 50%;
      border: 1px solid var(--primary);
      background: transparent;
      color: var(--primary);
      font-size: 1.05rem;
      line-height: 1;
      cursor: pointer;
      font-family: inherit;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s, color 0.2s, border-color 0.2s;
    }

    .info-bubble-icon:hover {
      background: var(--primary);
      color: var(--white);
    }

    .info-bubble[data-state="closed"] .info-bubble-icon {
      width: 1.4rem;
      height: 1.4rem;
      font-size: 0.85rem;
      border-color: var(--text-light);
      color: var(--text-light);
    }

    .info-bubble[data-state="closed"] .info-bubble-icon:hover {
      background: var(--primary);
      color: var(--white);
      border-color: var(--primary);
    }

    .info-bubble-body { flex: 1; min-width: 0; }

    .info-bubble-title {
      margin: 0 0 0.4rem;
      font-weight: 700;
      color: var(--primary-dark);
      font-size: 0.9rem;
    }

    .info-bubble-list {
      list-style: none;
      padding: 0;
      margin: 0 0 0.55rem;
    }

    .info-bubble-list li {
      font-size: 0.85rem;
      color: var(--text-light);
      margin: 0.25rem 0;
      padding-left: 1.1rem;
      position: relative;
    }

    .info-bubble-list li::before {
      content: '\25B8';
      position: absolute;
      left: 0;
      color: var(--primary);
    }

    .info-bubble-list li strong { color: var(--text); }

    .info-bubble-list code {
      background: var(--bg);
      padding: 0.05rem 0.3rem;
      border-radius: 3px;
      font-size: 0.8rem;
    }

    .info-bubble-list a {
      color: var(--primary);
      text-decoration: none;
    }

    .info-bubble-list a:hover { text-decoration: underline; }

    .info-bubble-footer {
      font-size: 0.75rem;
      color: var(--text-light);
      margin: 0;
    }

    .info-bubble-timer {
      font-variant-numeric: tabular-nums;
      font-weight: 600;
      color: var(--primary);
    }

    .info-bubble[data-state="closed"] .info-bubble-timer { display: none; }

    @media (max-width: 600px) {
      .info-bubble { padding: 0.7rem 0.75rem 0.7rem 0.6rem; gap: 0.6rem; }
      .info-bubble-list li { font-size: 0.8rem; }
    }

    /* Footer */
    footer {
      text-align: center;
      padding: 2rem 1.5rem;
      color: var(--text-light);
      font-size: 0.85rem;
      border-top: 1px solid var(--border);
      max-width: var(--max-width);
      margin: 0 auto;
    }

    footer a { color: var(--primary); text-decoration: none; }
    footer a:hover { text-decoration: underline; }

    /* Responsive */
    @media (max-width: 600px) {
      .page-header h1 { font-size: 1.3rem; }
      dl.flags dd { margin-left: 0.75rem; }
    }

    /* ====== Interactive flag rows ====== */
    dl.flags dt.flag-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.5rem;
      margin-top: 0.85rem;
      padding: 0.35rem 0.5rem 0.35rem 0.4rem;
      border-radius: 4px;
      transition: background 0.15s;
    }
    dl.flags dt.flag-row:hover { background: var(--code-bg); }

    dl.flags dt.flag-row .flag-check {
      margin: 0;
      cursor: pointer;
      accent-color: var(--primary);
      flex-shrink: 0;
    }

    dl.flags dt.flag-row .flag-name {
      cursor: pointer;
      user-select: none;
    }

    dl.flags dt.flag-row .flag-value {
      font-family: inherit;
      font-size: 0.8rem;
      padding: 0.15rem 0.4rem;
      border: 1px solid var(--border);
      border-radius: 3px;
      background: var(--bg);
      color: var(--text);
      width: 8rem;
    }
    dl.flags dt.flag-row select.flag-value { width: auto; }

    /* Arguments rows — same visual idiom as a flag row, but with no
       checkbox / test link / Rust-code toggle. The wrapper carries
       .arg-row instead of .flag-row so the JS-decoration logic in
       cli.js (which only targets .flag-row dts) doesn't touch them. */
    dl.flags dt.arg-row {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-top: 0.85rem;
      padding: 0.35rem 0.5rem 0.35rem 0.4rem;
      border-radius: 4px;
      transition: background 0.15s;
    }
    dl.flags dt.arg-row:hover { background: var(--code-bg); }
    dl.flags dt.arg-row .arg-name {
      flex-shrink: 0;
    }
    dl.flags dt.arg-row .arg-name code {
      background: var(--code-bg);
      padding: 0.15rem 0.4rem;
      border-radius: 3px;
      font-size: 0.9rem;
      color: var(--primary-dark);
    }
    dl.flags dt.arg-row .arg-value {
      flex: 1 1 auto;
      min-width: 0;
      max-width: 24rem;
      font-family: "Source Code Pro", "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
      font-size: 0.85rem;
      padding: 0.2rem 0.5rem;
      border: 1px solid var(--border);
      border-radius: 3px;
      background: var(--bg);
      color: var(--text);
      transition: border-color 120ms;
    }
    dl.flags dt.arg-row .arg-value:focus {
      border-color: var(--primary);
      outline: none;
    }
    dl.flags dt.arg-row .arg-value::placeholder {
      color: var(--text-light);
      opacity: 0.55;
    }

    dl.flags dt.flag-row .toggle-indicator {
      margin-left: auto;
      color: var(--text-light);
      font-size: 0.78rem;
      user-select: none;
      cursor: pointer;
      padding: 0.05rem 0.3rem;
      border-radius: 3px;
    }
    dl.flags dt.flag-row .toggle-indicator::before { content: '▸ '; color: var(--primary); }
    dl.flags dt.flag-row.expanded .toggle-indicator::before { content: '▾ '; }
    dl.flags dt.flag-row.expanded .toggle-indicator { color: var(--primary); }

    dl.flags dt.flag-row .test-link {
      font-size: 0.75rem;
      color: var(--text-light);
      text-decoration: none;
      border: 1px solid var(--border);
      border-radius: 3px;
      padding: 0.05rem 0.4rem;
    }
    dl.flags dt.flag-row .test-link:hover {
      color: var(--primary);
      border-color: var(--primary);
    }

    .flag-rust {
      display: none;
      margin: 0.5rem 0 0.25rem 1.25rem;
      padding-left: 0.75rem;
      border-left: 3px solid var(--primary);
    }
    .flag-rust pre {
      font-size: 0.8rem;
      padding: 0.6rem 0.85rem;
      margin: 0.25rem 0;
    }
    .flag-rust .test-ref {
      font-size: 0.78rem;
      color: var(--text-light);
      margin: 0.35rem 0 0;
    }
    .flag-rust .test-ref a {
      color: var(--primary);
      text-decoration: none;
    }
    .flag-rust .test-ref a:hover { text-decoration: underline; }
    dl.flags dt.flag-row.expanded + dd .flag-rust { display: block; }

    /* ====== Base setup block ====== */
    .cmd-base-setup {
      margin: 0.6rem 0 1.5rem;
      border: 1px solid var(--border);
      border-radius: 6px;
      background: var(--code-bg);
    }
    .cmd-base-setup-toggle {
      width: 100%;
      text-align: left;
      background: transparent;
      color: var(--text);
      border: none;
      padding: 0.7rem 1rem;
      font-family: inherit;
      font-size: 0.9rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .cmd-base-setup-toggle::before { content: '▸'; color: var(--primary); }
    .cmd-base-setup.expanded .cmd-base-setup-toggle::before { content: '▾'; }
    .cmd-base-setup-toggle:hover { color: var(--primary); }
    .cmd-base-setup-body {
      display: none;
      padding: 0 1rem 1rem;
    }
    .cmd-base-setup.expanded .cmd-base-setup-body { display: block; }
    .cmd-base-setup-body p {
      font-size: 0.85rem;
      margin-bottom: 0.5rem;
    }
    .cmd-base-setup-body .test-ref {
      font-size: 0.78rem;
      margin-top: 0.5rem;
      color: var(--text-light);
    }
    .cmd-base-setup-body .test-ref a {
      color: var(--primary);
      text-decoration: none;
    }
    .cmd-base-setup-body .test-ref a:hover { text-decoration: underline; }

    /* ====== Generator panel ====== */
    .code-generator {
      margin: 2rem 0 1rem;
      padding: 1.25rem;
      background: var(--code-bg);
      border: 2px solid var(--primary);
      border-radius: 8px;
    }
    .code-generator > h3 {
      margin: 0 0 0.4rem;
      color: var(--primary-dark);
      font-size: 1.05rem;
    }
    .code-generator .summary {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-bottom: 0.75rem;
    }

    /* (The arg-input rules previously living here have moved to the
       Arguments dl in the pyramid command section — see `.arg-row`
       above.) */
    .code-generator h4 {
      margin: 1.25rem 0 0.4rem;
      font-size: 0.78rem;
      text-transform: uppercase;
      letter-spacing: 1.2px;
      color: var(--text-light);
    }
    .code-generator pre {
      background: var(--bg);
      border: 1px solid var(--border);
      font-size: 0.83rem;
      padding: 0.85rem 1rem;
      margin: 0;
      white-space: pre;
      overflow-x: auto;
    }
    .code-generator .gen-actions {
      display: flex;
      gap: 0.5rem;
      margin-top: 0.85rem;
      flex-wrap: wrap;
    }
    .code-generator .gen-actions button {
      background: var(--primary);
      color: var(--white);
      border: none;
      border-radius: 4px;
      padding: 0.4rem 0.85rem;
      cursor: pointer;
      font-family: inherit;
      font-size: 0.8rem;
    }
    .code-generator .gen-actions button:hover { background: var(--primary-dark); }
    .code-generator .gen-actions button.secondary {
      background: transparent;
      color: var(--text-light);
      border: 1px solid var(--border);
    }
    .code-generator .gen-actions button.secondary:hover {
      color: var(--primary);
      border-color: var(--primary);
    }
    .code-generator .copy-fade { animation: fade 1.5s; }
    @keyframes fade { 0% { opacity: 1; } 100% { opacity: 1; } }