/* Understory home page styles (moved out of index.html) */
  :root {
    color-scheme: light;
    --bg: #FAF7EF;
    --surface: #F1EDE0;
    --ink: #23281F;
    --ink-soft: #565C4C;
    --ink-muted: #83806f;
    --moss: #3B6748;
    --sprout: #6E9450;
    --clay: #A97C4F;
    --border: rgba(35, 40, 31, 0.14);
    --border-strong: rgba(35, 40, 31, 0.30);
    --chip-bg: rgba(59, 103, 72, 0.10);
    --chip-bg-open: rgba(169, 124, 79, 0.16);
    --c-blue: #2a78d6;
    --c-orange: #eb6834;
    --c-aqua: #1baf7a;
    --chart-grid: rgba(35, 40, 31, 0.12);
  }

  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #14180F;
      --surface: #1B2115;
      --ink: #EDE9DC;
      --ink-soft: #A9AF98;
      --ink-muted: #7d8271;
      --moss: #9BC985;
      --sprout: #C7DC9E;
      --clay: #D6A96F;
      --border: rgba(237, 233, 220, 0.14);
      --border-strong: rgba(237, 233, 220, 0.30);
      --chip-bg: rgba(155, 201, 133, 0.12);
      --chip-bg-open: rgba(214, 169, 111, 0.18);
      --c-blue: #3987e5;
      --c-orange: #d95926;
      --c-aqua: #199e70;
      --chart-grid: rgba(237, 233, 220, 0.14);
    }
  }
  :root[data-theme="dark"] {
    --bg: #14180F; --surface: #1B2115; --ink: #EDE9DC; --ink-soft: #A9AF98; --ink-muted: #7d8271;
    --moss: #9BC985; --sprout: #C7DC9E; --clay: #D6A96F;
    --border: rgba(237, 233, 220, 0.14); --border-strong: rgba(237, 233, 220, 0.30);
    --chip-bg: rgba(155, 201, 133, 0.12); --chip-bg-open: rgba(214, 169, 111, 0.18);
    --c-blue: #3987e5; --c-orange: #d95926; --c-aqua: #199e70;
    --chart-grid: rgba(237, 233, 220, 0.14);
  }

  * { box-sizing: border-box; }
  html { background: var(--bg); }
  body { margin: 0; background: var(--bg); color: var(--ink); font-family: "Karla", -apple-system, "Noto Sans TC", "PingFang TC", sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; }
  img { max-width: 100%; }
  h1, h2, h3, .wordmark { font-family: "Fraunces", "Noto Serif TC", Georgia, serif; text-wrap: balance; font-weight: 600; letter-spacing: -0.01em; color: var(--ink); }
  .mono { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace; }
  .wrap { max-width: 980px; margin: 0 auto; padding: 0 28px; }
  .prose { max-width: 64ch; }
  .prose p { margin: 0 0 16px; }
  .prose p:last-child { margin-bottom: 0; }
  .prose strong { color: var(--moss); font-weight: 700; }
  a { color: var(--moss); }

  .topbar { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--border); }
  .topbar .wrap { display: flex; align-items: center; justify-content: space-between; padding: 16px 28px; max-width: 980px; }
  .topbar .wordmark { font-size: 20px; margin: 0; }
  .topbar .wordmark span { color: var(--sprout); }
  .topnav { display: flex; align-items: center; gap: 22px; list-style: none; margin: 0; padding: 0; }
  .topnav a, .topnav .sub-btn, .topnav .soon { font-family: "IBM Plex Mono", monospace; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); text-decoration: none; }
  .topnav a:hover, .topnav .sub-btn:hover, .topnav .sub-btn[aria-expanded="true"] { color: var(--moss); }
  .topnav .sub-btn { background: none; border: 0; padding: 0; cursor: pointer; }
  .topnav .sub-btn .caret { display: inline-block; margin-left: 4px; font-size: 10px; transition: transform .2s ease; }
  .topnav .sub-btn[aria-expanded="true"] .caret { transform: rotate(180deg); }
  .topnav .has-sub { position: relative; }
  .topnav .sub { display: none; position: absolute; top: calc(100% + 14px); left: -16px; min-width: 250px; list-style: none; margin: 0; padding: 8px 0; background: var(--bg); border: 1px solid var(--border-strong); border-radius: 6px; box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12); }
  .topnav .sub.open { display: block; }
  .topnav .sub a, .topnav .sub .soon { display: block; padding: 8px 18px; text-transform: none; letter-spacing: 0; font-family: "Karla", -apple-system, "Noto Sans TC", "PingFang TC", sans-serif; font-size: 14.5px; }
  .topnav .sub a:hover { background: var(--chip-bg); }
  .topnav .soon { color: var(--ink-muted); cursor: default; }
  .topnav .soon em { font-style: normal; font-size: 10.5px; letter-spacing: 0.04em; margin-left: 8px; padding: 2px 8px; border-radius: 20px; background: var(--chip-bg); color: var(--moss); white-space: nowrap; }
  .topbar .wordmark a { color: inherit; text-decoration: none; }
  .menu-btn { display: none; font-family: "IBM Plex Mono", monospace; font-size: 12.5px; letter-spacing: 0.05em; color: var(--ink-soft); background: none; border: 1px solid var(--border-strong); border-radius: 20px; padding: 5px 14px; cursor: pointer; }
  .topnav a:focus-visible, .sub-btn:focus-visible, .menu-btn:focus-visible { outline: 2px solid var(--moss); outline-offset: 3px; border-radius: 2px; }
  @media (max-width: 760px) {
    .offer { grid-template-columns: 1fr; }
  }
  @media (max-width: 860px) {
    .topbar .wrap { flex-wrap: wrap; padding: 12px 28px; }
    .menu-btn { display: inline-block; }
    .topnav { display: none; width: 100%; flex-direction: column; align-items: flex-start; gap: 0; padding: 10px 0 6px; }
    .topnav.open { display: flex; }
    .topnav > li { width: 100%; padding: 10px 0; border-top: 1px solid var(--border); }
    .topnav .sub { position: static; min-width: 0; margin-top: 6px; padding: 0 0 0 4px; border: 0; border-radius: 0; box-shadow: none; background: none; }
    .topnav .sub a, .topnav .sub .soon { padding: 8px 12px; }
  }

  .hero { padding: 68px 0 52px; border-bottom: 1px solid var(--border); }
  .eyebrow { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--sprout); margin: 0 0 20px; }
  .hero h1 { font-size: clamp(32px, 5.2vw, 50px); line-height: 1.15; margin: 0 0 20px; max-width: 16ch; }
  .hero .lede { font-size: 17px; color: var(--ink-soft); max-width: 58ch; margin: 0; }
  .offer { list-style: none; margin: 30px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); }
  .offer li { background: var(--bg); padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 6px; }
  .offer strong { font-family: "Fraunces", "Noto Serif TC", Georgia, serif; font-size: 17px; font-weight: 600; color: var(--moss); }
  .offer span { font-size: 13.5px; color: var(--ink-soft); line-height: 1.7; }
  .cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 0; }
  .btn { display: inline-block; padding: 10px 22px; border-radius: 4px; border: 1px solid var(--moss); background: var(--moss); color: var(--bg); font-size: 14.5px; font-weight: 700; text-decoration: none; }
  .btn:hover { filter: brightness(1.1); }
  .btn.ghost { background: transparent; color: var(--moss); }
  .btn.ghost:hover { background: var(--chip-bg); filter: none; }
  .prod-intro { padding: 56px 0 60px; border-bottom: 1px solid var(--border); scroll-margin-top: 64px; }
  .prod-intro h2 { font-size: 30px; margin: 12px 0 14px; }
  .prod-intro .lede { font-size: 16px; color: var(--ink-soft); max-width: 60ch; margin: 0; }
  .points-title { font-family: "Karla", "Noto Sans TC", sans-serif; font-size: 15px; font-weight: 700; color: var(--ink); margin: 26px 0 10px; letter-spacing: 0; text-transform: none; }
  .points { margin: 0 0 24px; padding-left: 1.2em; max-width: 60ch; font-size: 15px; color: var(--ink-soft); }
  .points li { margin: 0 0 6px; }
  .points strong { color: var(--moss); font-weight: 700; }
  .prod-intro .more { margin: 22px 0 0; font-size: 14.5px; }

  .teaser-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); margin-top: 40px; }
  .teaser { background: var(--bg); padding: 24px 26px; text-decoration: none; display: block; }
  .teaser-row .teaser:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .teaser .tname { font-size: 20px; margin: 0 0 8px; color: var(--ink); }
  .teaser p { font-size: 13.5px; color: var(--ink-soft); margin: 0 0 10px; }
  .status-chip { display: inline-block; font-family: "IBM Plex Mono", monospace; font-size: 10.5px; letter-spacing: 0.05em; text-transform: uppercase; background: var(--chip-bg); color: var(--moss); padding: 3px 9px; border-radius: 20px; }
  .status-chip.open { background: var(--chip-bg-open); color: var(--clay); }

  .product { padding: 64px 0; border-bottom: 1px solid var(--border); scroll-margin-top: 64px; }
  .product h2 { font-size: 30px; margin: 12px 0 22px; }
  .product .status-chip { margin-bottom: 0; }

  .feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); margin: 30px 0; }
  .feature { background: var(--bg); padding: 20px 22px; }
  .feature h3 { font-family: "Karla", sans-serif; font-size: 14.5px; font-weight: 700; color: var(--moss); margin: 0 0 8px; text-transform: none; letter-spacing: 0; }
  .feature p { font-size: 13.5px; color: var(--ink-soft); margin: 0; }

  .screens-block { margin: 30px 0; }
  .screens-block .chart-title { font-family: "IBM Plex Mono", monospace; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); margin: 0 0 18px; }
  .screens-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .screen-shot { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; background: var(--surface); }
  .screen-shot img { display: block; width: 100%; height: auto; }
  .screen-shot p { margin: 0; padding: 8px 10px; font-size: 11.5px; color: var(--ink-muted); text-align: center; border-top: 1px solid var(--border); }
  @media (max-width: 720px) {
    .screens-grid { grid-template-columns: repeat(2, 1fr); }
  }

  .chart-caption { font-size: 11.5px; color: var(--ink-muted); margin: 14px 0 0; font-style: italic; }
  .chart-row { display: flex; gap: 32px; align-items: center; flex-wrap: wrap; }
  .legend { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
  .legend li { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--ink); }
  .legend .swatch { width: 11px; height: 11px; border-radius: 2px; flex: none; }
  .legend .pct { font-family: "IBM Plex Mono", monospace; color: var(--ink-soft); margin-left: 4px; font-size: 12px; }

  .reference-note { font-size: 13px; color: var(--ink-muted); border-left: 2px solid var(--border-strong); padding-left: 16px; margin: 26px 0; }

  .callout { background: var(--surface); border: 1px solid var(--border); border-radius: 4px; padding: 20px 24px; margin-top: 28px; font-size: 14px; color: var(--ink-soft); }
  .callout strong { color: var(--ink); }
  .callout.open { border-color: var(--clay); }
  .cta-btn { display: inline-block; margin-top: 14px; margin-right: 10px; padding: 10px 20px; background: var(--moss); color: var(--bg); text-decoration: none; border-radius: 3px; font-size: 13.5px; font-weight: 700; }
  .cta-btn:hover { opacity: 0.9; }
  .cta-btn.secondary { background: transparent; color: var(--moss); border: 1px solid var(--border-strong); }
  .cta-row { margin-top: 14px; }
  .callout .fine-print { display: block; margin-top: 14px; font-size: 12.5px; color: var(--ink-muted); }

  .about, .contact { padding: 56px 0; }
  .about { border-bottom: 1px solid var(--border); }
  .about h2, .contact h2 { font-size: 25px; margin: 0 0 22px; }
  .contact-links { display: flex; gap: 24px; margin-top: 18px; flex-wrap: wrap; }
  .contact-links a { font-family: "IBM Plex Mono", monospace; font-size: 14px; text-decoration: none; border-bottom: 1px solid var(--border-strong); padding-bottom: 2px; }

  footer { padding: 32px 0 64px; border-top: 1px solid var(--border); }
  footer .wrap p { font-family: "IBM Plex Mono", monospace; font-size: 12px; color: var(--ink-muted); margin: 0; }

  @media (max-width: 680px) {
    .teaser-row, .feature-grid { grid-template-columns: 1fr; }
    .chart-row { flex-direction: column; align-items: flex-start; }
  }

  /* language switcher and Japanese type */
  .topnav .langs { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: 0.04em; color: var(--ink-muted); margin-left: 6px; padding-left: 14px; border-left: 1px solid var(--border-strong); white-space: nowrap; }
  .topnav .langs a { color: var(--ink-muted); text-transform: none; }
  .topnav .langs a[aria-current="true"] { color: var(--moss); font-weight: 700; }
  @media (max-width: 860px) { .topnav .langs { margin-left: 0; padding-left: 0; border-left: 0; } }
  html[lang="ja"] body { font-family: "Karla", "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", sans-serif; }
  html[lang="ja"] h1, html[lang="ja"] h2, html[lang="ja"] h3, html[lang="ja"] .wordmark { font-family: "Fraunces", "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif; }