:root {
      --ink: #111111;
      --ink-2: #1a1a1a;
      --muted: #6b7280;
      --muted-2: #9ca3af;
      --line: #e5e7eb;
      --line-strong: #d1d5db;
      --surface: #ffffff;
      --surface-2: #f3f4f6;
      --surface-3: #f9fafb;
      --accent: #111111;
      --on-accent: #ffffff;
      --accent-hover: #242424;
      --ok: #15803d;
      --warn: #b45309;
      --hero-glow: #f3f4f6;
      --board-fg: #374151;
      --row-dash: #eef0f3;
      --bar-track: #e5e7eb;
      --badge-bg: #ffffff;
      --cmd-fg: #e5e7eb;
      --cmd-accent: #a3e635;
      --footer-bg: #111111;
      --footer-fg: #a1a1aa;
      --footer-fg-strong: #fafafa;
      --footer-mute: #71717a;
      --footer-line: #27272a;
      --font-display: "Cal Sans", "Plus Jakarta Sans", sans-serif;
      --font-body: "Plus Jakarta Sans", sans-serif;
      --font-mono: "JetBrains Mono", ui-monospace, monospace;
      --radius: 8px;
      --ease: cubic-bezier(0.22, 1, 0.36, 1);
      --max: 1120px;
      color-scheme: light;
    }

    html.dark {
      --ink: #fafafa;
      --ink-2: #e4e4e7;
      --muted: #a1a1aa;
      --muted-2: #71717a;
      --line: #27272a;
      --line-strong: #3f3f46;
      --surface: #09090b;
      --surface-2: #18181b;
      --surface-3: #111113;
      --accent: #fafafa;
      --on-accent: #09090b;
      --accent-hover: #e4e4e7;
      --ok: #4ade80;
      --warn: #fbbf24;
      --hero-glow: #18181b;
      --board-fg: #a1a1aa;
      --row-dash: #27272a;
      --bar-track: #27272a;
      --badge-bg: #18181b;
      color-scheme: dark;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      font-family: var(--font-body);
      background: var(--surface);
      line-height: 1.55;
      -webkit-font-smoothing: antialiased;
      font-size: 16px;
    }
    a { color: inherit; }
    code { font-family: var(--font-mono); font-size: 0.9em; }

    .skip {
      position: absolute; left: -999px; top: 0;
    }
    .skip:focus {
      left: 1rem; top: 1rem; z-index: 40;
      background: var(--surface); padding: 0.5rem 0.75rem;
      border: 1px solid var(--line);
    }

    /* —— Top nav (Cal-like) —— */
    .nav {
      position: sticky;
      top: 0;
      z-index: 30;
      background: color-mix(in srgb, var(--surface) 86%, transparent);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--line);
    }
    .nav-inner {
      width: min(var(--max), calc(100% - 2rem));
      margin: 0 auto;
      height: 3.75rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }
    .logo {
      font-family: var(--font-display);
      font-size: 1.35rem;
      letter-spacing: -0.04em;
      text-decoration: none;
      color: var(--ink);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      font-size: 0.925rem;
      font-weight: 500;
      color: var(--muted);
    }
    .nav-links a { text-decoration: none; }
    .nav-links a:hover { color: var(--ink); }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.4rem;
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 0.925rem;
      text-decoration: none;
      border-radius: var(--radius);
      padding: 0.65rem 1rem;
      border: 1px solid transparent;
      transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
      cursor: pointer;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary {
      background: var(--ink);
      color: var(--on-accent);
      border-color: var(--ink);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      border-color: var(--accent-hover);
      color: var(--on-accent);
    }
    .btn-secondary {
      background: var(--surface);
      color: var(--ink);
      border-color: var(--line-strong);
    }
    .btn-secondary:hover { background: var(--surface-2); }
    .btn-sm { padding: 0.45rem 0.8rem; font-size: 0.875rem; }

    /* —— Hero —— */
    .hero {
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--line);
      background:
        radial-gradient(80% 60% at 100% 0%, var(--hero-glow) 0%, transparent 55%),
        var(--surface);
    }
    .hero-inner {
      width: min(var(--max), calc(100% - 2rem));
      margin: 0 auto;
      padding: clamp(3.5rem, 8vw, 5.5rem) 0 clamp(3rem, 6vw, 4.5rem);
      display: grid;
      gap: 2.5rem;
      align-items: center;
    }
    @media (min-width: 960px) {
      .hero-inner {
        grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
        gap: 3rem;
        min-height: calc(100svh - 3.75rem);
        padding-top: 4rem;
        padding-bottom: 4rem;
      }
    }
    .hero-copy {
      opacity: 0;
      transform: translateY(12px);
      animation: rise 0.7s var(--ease) 0.05s forwards;
    }
    @keyframes rise {
      to { opacity: 1; transform: none; }
    }
    .brand-mark {
      font-family: var(--font-display);
      font-size: clamp(3.25rem, 10vw, 5.5rem);
      letter-spacing: -0.05em;
      line-height: 0.9;
      margin: 0 0 1.1rem;
      color: var(--ink);
    }
    .hero h1 {
      font-family: var(--font-display);
      font-weight: 400;
      font-size: clamp(2rem, 4.8vw, 3.15rem);
      letter-spacing: -0.04em;
      line-height: 1.08;
      margin: 0 0 1rem;
      max-width: 14ch;
    }
    .hero .lede {
      margin: 0 0 1.75rem;
      color: var(--muted);
      font-size: 1.125rem;
      max-width: 34rem;
    }
    .cta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      margin-bottom: 0.85rem;
    }
    .hero-note {
      margin: 0;
      font-size: 0.875rem;
      color: var(--muted-2);
    }

    /* Product panel in hero — interactive-looking board */
    .hero-panel {
      opacity: 0;
      transform: translateY(16px);
      animation: rise 0.8s var(--ease) 0.2s forwards;
      min-width: 0;
      max-width: 100%;
    }
    .panel {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: 12px;
      overflow: hidden;
      min-width: 0;
      max-width: 100%;
    }
    .panel-chrome {
      display: flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.7rem 0.9rem;
      border-bottom: 1px solid var(--line);
      background: var(--surface-3);
    }
    .dot {
      width: 8px; height: 8px; border-radius: 50%;
      background: var(--line-strong);
    }
    .panel-chrome span {
      margin-left: 0.35rem;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--muted);
      letter-spacing: 0.02em;
    }
    .board {
      padding: 1rem 1.1rem 1.15rem;
      font-family: var(--font-mono);
      font-size: 0.72rem;
      line-height: 1.55;
      color: var(--board-fg);
      min-width: 0;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      overscroll-behavior-x: contain;
      scrollbar-width: thin;
    }
    .board .sec {
      color: var(--muted-2);
      font-weight: 500;
      letter-spacing: 0.06em;
      margin: 0.55rem 0 0.35rem;
      font-size: 0.65rem;
    }
    .board .sec:first-child { margin-top: 0; }
    .board .row {
      display: grid;
      grid-template-columns: max-content max-content max-content;
      gap: 0.5rem 0.75rem;
      align-items: center;
      padding: 0.28rem 0;
      border-bottom: 1px dashed var(--row-dash);
      width: max-content;
      min-width: 100%;
      box-sizing: border-box;
    }
    .board .row:last-child { border-bottom: 0; }
    .board .name { color: var(--ink); font-weight: 500; white-space: nowrap; }
    .board .ok { color: var(--ok); white-space: nowrap; }
    .board .cool { color: var(--warn); white-space: nowrap; }
    .bar {
      display: inline-block;
      width: 5.5rem;
      height: 0.45rem;
      background: var(--bar-track);
      border-radius: 2px;
      overflow: hidden;
      vertical-align: middle;
      margin-right: 0.4rem;
      flex-shrink: 0;
    }
    .bar i {
      display: block;
      height: 100%;
      background: var(--ink);
      border-radius: 2px;
    }
    .bar.low i { background: var(--warn); width: 18%; }
    .pct { color: var(--muted); white-space: nowrap; }

    /* —— Sections —— */
    .wrap {
      width: min(var(--max), calc(100% - 2rem));
      margin: 0 auto;
    }
    section.block {
      padding: clamp(3.5rem, 7vw, 5rem) 0;
      border-bottom: 1px solid var(--line);
    }
    .kicker {
      margin: 0 0 0.65rem;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--muted);
    }
    .block h2 {
      font-family: var(--font-display);
      font-weight: 400;
      font-size: clamp(1.75rem, 3.5vw, 2.35rem);
      letter-spacing: -0.035em;
      line-height: 1.15;
      margin: 0 0 0.75rem;
      max-width: 22ch;
    }
    .block > .lede, .section-lede {
      margin: 0 0 2rem;
      color: var(--muted);
      font-size: 1.05rem;
      max-width: 40rem;
    }

    .steps {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 1rem;
    }
    @media (min-width: 800px) {
      .steps { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
    }
    .step {
      border: 1px solid var(--line);
      border-radius: 12px;
      padding: 1.25rem 1.2rem 1.35rem;
      background: var(--surface);
    }
    .step:hover {
      border-color: var(--line-strong);
    }
    .step .n {
      font-family: var(--font-display);
      font-size: 1.1rem;
      letter-spacing: -0.02em;
      margin-bottom: 0.75rem;
      color: var(--ink);
    }
    .step h3 {
      font-family: var(--font-display);
      font-weight: 400;
      font-size: 1.2rem;
      letter-spacing: -0.02em;
      margin: 0 0 0.4rem;
    }
    .step p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }

    /* Routing table */
    .route-grid {
      display: grid;
      gap: 0.75rem;
    }
    .route {
      display: grid;
      gap: 0.35rem 1.25rem;
      padding: 1.1rem 1.2rem;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: var(--surface-3);
      align-items: baseline;
    }
    @media (min-width: 720px) {
      .route {
        grid-template-columns: 10.5rem minmax(0, 1fr) auto;
        align-items: center;
      }
    }
    .route .preset {
      font-family: var(--font-mono);
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--ink);
    }
    .route .strat {
      font-size: 0.75rem;
      color: var(--muted-2);
      font-family: var(--font-mono);
      margin-top: 0.15rem;
    }
    .route p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .route .badge {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--ink);
      background: var(--badge-bg);
      border: 1px solid var(--line);
      border-radius: 6px;
      padding: 0.25rem 0.55rem;
      white-space: nowrap;
      justify-self: start;
    }
    @media (min-width: 720px) {
      .route .badge { justify-self: end; }
    }

    .split {
      display: grid;
      gap: 1.5rem;
    }
    .split > * { min-width: 0; }
    @media (min-width: 900px) {
      .split {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 2rem;
        align-items: start;
      }
    }
    .quota-copy h3 {
      font-family: var(--font-display);
      font-weight: 400;
      font-size: 1.35rem;
      letter-spacing: -0.02em;
      margin: 0 0 0.5rem;
    }
    .quota-copy p {
      margin: 0 0 1rem;
      color: var(--muted);
    }
    .quota-copy ul {
      margin: 0;
      padding-left: 1.1rem;
      color: var(--muted);
    }
    .quota-copy li { margin: 0.35rem 0; }
    .cmd {
      margin-top: 1.25rem;
      background: var(--footer-bg);
      color: var(--cmd-fg);
      border-radius: var(--radius);
      padding: 0.95rem 1.05rem;
      font-family: var(--font-mono);
      font-size: 0.85rem;
      overflow-x: auto;
    }
    .cmd em {
      font-style: normal;
      color: var(--cmd-accent);
    }

    .contract {
      display: grid;
      gap: 0.65rem;
      max-width: 36rem;
    }
    .contract code {
      display: block;
      background: var(--surface-2);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 0.9rem 1rem;
      font-size: 0.88rem;
      color: var(--ink);
    }
    .contract code strong {
      display: inline-block;
      min-width: 5.5rem;
      color: var(--muted);
      font-weight: 600;
    }
    .footnote {
      margin: 1.25rem 0 0;
      color: var(--muted);
      font-size: 0.925rem;
    }
    .footnote a { color: var(--ink); text-underline-offset: 3px; }


    /* —— Language (Cal-like: text trigger, hairline menu, no shadow stack) —— */
    .nav-right {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    @media (max-width: 720px) {
      .nav-links .hide-sm { display: none; }
      .nav-right { gap: 0.65rem; }
    }
    .theme-toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 2rem;
      height: 2rem;
      padding: 0;
      margin: 0;
      border: 0;
      background: transparent;
      color: var(--muted);
      cursor: pointer;
      border-radius: 6px;
    }
    .theme-toggle:hover { color: var(--ink); background: var(--surface-2); }
    .theme-toggle .theme-icon { display: none; width: 1.05rem; height: 1.05rem; }
    .theme-toggle[data-mode="system"] .theme-icon-system,
    .theme-toggle[data-mode="light"] .theme-icon-light,
    .theme-toggle[data-mode="dark"] .theme-icon-dark { display: block; }
    .theme-toggle:not([data-mode]) .theme-icon-system { display: block; }

    .lang-dd {
      position: relative;
    }
    .lang-dd summary {
      list-style: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--muted);
      background: transparent;
      border: 0;
      padding: 0.35rem 0.15rem;
      user-select: none;
    }
    .lang-dd summary::-webkit-details-marker { display: none; }
    .lang-dd summary:hover,
    .lang-dd[open] summary { color: var(--ink); }
    .lang-dd summary .chev {
      display: inline-block;
      width: 0.55rem;
      height: 0.55rem;
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      transform: rotate(45deg) translateY(-1px);
      opacity: 0.7;
    }
    .lang-dd[open] summary .chev {
      transform: rotate(225deg) translateY(-1px);
    }
    .lang-dd .lang-menu {
      position: absolute;
      right: 0;
      top: calc(100% + 0.5rem);
      min-width: 9.5rem;
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 0.25rem;
      z-index: 50;
      display: grid;
    }
    .lang-dd .lang-menu a {
      display: block;
      text-decoration: none;
      color: var(--ink);
      font-size: 0.875rem;
      font-weight: 500;
      padding: 0.55rem 0.7rem;
      border-radius: 6px;
    }
    .lang-dd .lang-menu a:hover { background: var(--surface-2); }
    .lang-dd .lang-menu a[aria-current="page"] {
      background: var(--surface-2);
    }

    /* —— FAQ —— */
    .faq-list { display: grid; gap: 0; max-width: 40rem; }
    .faq-item {
      border-top: 1px solid var(--line);
      padding: 0;
      background: transparent;
    }
    .faq-item:last-child { border-bottom: 1px solid var(--line); }
    .faq-item summary {
      cursor: pointer;
      font-family: var(--font-body);
      font-size: 1rem;
      font-weight: 600;
      letter-spacing: -0.01em;
      padding: 1rem 0;
      list-style: none;
      color: var(--ink);
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item p {
      margin: 0 0 1.1rem;
      color: var(--muted);
      max-width: 36rem;
    }

    /* —— Site footer (Cal marketing: always dark band, quiet columns) —— */
    .site-footer {
      background: var(--footer-bg);
      color: var(--footer-fg);
      margin-top: 0;
      border-top: 0;
    }
    .site-footer a {
      color: var(--footer-fg);
      text-decoration: none;
    }
    .site-footer a:hover { color: var(--footer-fg-strong); }
    .footer-top {
      width: min(var(--max), calc(100% - 2rem));
      margin: 0 auto;
      padding: 4rem 0 3rem;
      display: grid;
      gap: 2.5rem;
    }
    @media (min-width: 900px) {
      .footer-top {
        grid-template-columns: minmax(0, 1.1fr) minmax(0, 2fr);
        gap: 4rem;
        align-items: start;
      }
    }
    .footer-brand-block .footer-logo {
      font-family: var(--font-display);
      font-size: 1.5rem;
      letter-spacing: -0.04em;
      color: var(--footer-fg-strong);
      text-decoration: none;
    }
    .footer-tagline {
      margin: 0.85rem 0 0;
      font-size: 0.925rem;
      line-height: 1.55;
      color: var(--footer-mute);
      max-width: 20rem;
    }
    .footer-cols {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 2rem 1.5rem;
    }
    @media (min-width: 720px) {
      .footer-cols {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 2rem 1.75rem;
      }
    }
    .footer-cols h2 {
      margin: 0 0 1rem;
      font-family: var(--font-body);
      font-size: 0.875rem;
      font-weight: 600;
      letter-spacing: -0.01em;
      text-transform: none;
      color: var(--footer-fg-strong);
    }
    .footer-cols ul {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 0.7rem;
    }
    .footer-cols a {
      font-size: 0.875rem;
      color: var(--footer-fg);
      line-height: 1.35;
    }
    .footer-cols a:hover { color: var(--footer-fg-strong); }
    .footer-bottom {
      width: min(var(--max), calc(100% - 2rem));
      margin: 0 auto;
      padding: 1.25rem 0 2rem;
      border-top: 1px solid var(--footer-line);
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem 1.25rem;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
      color: var(--footer-mute);
    }
    .footer-bottom p { margin: 0; }
    .footer-bottom a { color: var(--footer-fg); }
    .footer-bottom a:hover { color: var(--footer-fg-strong); }

    @media (prefers-reduced-motion: reduce) {
      .hero-copy, .hero-panel { animation: none; opacity: 1; transform: none; }
      .btn:hover { transform: none; }
    }