/* Plankast marketing site — Studio design tokens (docs/design/plankast-design-guide.pdf). */
  :root {
    color-scheme: light;
    /* Studio · 01 colour tokens */
    --canvas: #F4F5F6;
    --surface: #FFFFFF;
    --sunken: #F9FAFA;
    --hairline: #E3E6E8;
    --hairline-soft: #F0F2F3;
    --ink: #1A1D21;
    --ink-body: #2C3237;
    --ink-muted: #5E656B;
    --accent: #1F6F6B;
    --accent-tint: #F6F8F8;
    --accent-sel: #E8EDEC;
    --accent-text: #155A56;
    --brand: #126E6B;
    --urgency: #C2483B;
    --p2: #C98A18; --p2-text: #8A5E0D;
    --p3: #3D7EA6; --p3-text: #2F6684;
    --status-working-bg: #F6EEDB; --status-working-fg: #7D5509;
    --status-synced-bg: #E4EFEE; --status-synced-fg: #155A56;
    /* Studio · 02 type */
    --sans: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
    --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
    --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    /* Studio · 03 space, radius, shadow */
    --r-chip: 3px; --r-control: 5px; --r-card: 8px;
    --shadow-sheet: 0 8px 24px rgba(16,20,24,.12);
    --gutter: clamp(16px, 4vw, 40px);
    --measure: 62ch;
  }

  * { box-sizing: border-box; }
  [hidden] { display: none !important; }
  .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
  html { height: 100%; }
  body {
    margin: 0;
    background: var(--canvas);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  a { color: var(--accent-text); text-decoration: none; }
  a:hover { text-decoration: underline; text-underline-offset: 2px; }
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--r-control); }
  code, kbd { font-family: var(--mono); font-size: .92em; }

  /* type scale */
  h1, h2, h3 { margin: 0; font-weight: 600; text-wrap: balance; }
  h1 { font-size: clamp(38px, 6vw, 64px); line-height: 1.04; letter-spacing: -.025em; }
  h2 { font-size: clamp(26px, 3.4vw, 36px); line-height: 1.12; letter-spacing: -.02em; }
  h3 { font-size: 17px; line-height: 1.3; letter-spacing: -.01em; }
  p { margin: 0; }
  .lede { font-size: clamp(17px, 1.6vw, 20px); line-height: 1.5; color: var(--ink-body); max-width: var(--measure); }
  .body { color: var(--ink-body); max-width: var(--measure); }
  .muted { color: var(--ink-muted); }
  .label {
    font-family: var(--mono); font-size: 10.5px; letter-spacing: .11em; text-transform: uppercase;
    color: var(--ink-muted); line-height: 1.2;
  }
  .label.accent { color: var(--accent-text); }
  .meta { font-family: var(--mono); font-size: 11px; color: var(--ink-muted); font-variant-numeric: tabular-nums; }
  .serif { font-family: var(--serif); color: var(--ink-body); }

  /* structure */
  .wrap { max-width: 1120px; margin-inline: auto; padding-inline: var(--gutter); }
  section { border-top: 1px solid var(--hairline); }
  .section { padding-block: clamp(56px, 8vw, 96px); }
  .section-head { display: grid; gap: 14px; margin-bottom: clamp(32px, 4vw, 48px); max-width: 720px; }
  .two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
  @media (max-width: 820px) { .two { grid-template-columns: 1fr; } }

  /* buttons — accent = actionable, the only coloured thing */
  .btn {
    display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 16px;
    border-radius: var(--r-control); border: 1px solid transparent; font: 500 14px/1 var(--sans);
    cursor: pointer; text-decoration: none; white-space: nowrap; transition: background 120ms ease-out, border-color 120ms ease-out;
  }
  .btn:hover { text-decoration: none; }
  .btn-primary { background: var(--accent); color: #fff; }
  .btn-primary:hover { background: var(--accent-text); }
  .btn-secondary { background: var(--surface); color: var(--ink); border-color: var(--hairline); }
  .btn-secondary:hover { background: var(--accent-tint); border-color: var(--accent); }
  .btn-quiet { background: transparent; color: var(--accent-text); padding-inline: 4px; }
  .btn .arrow { font-family: var(--mono); }

  /* nav */
  .nav {
    position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
    background: rgba(244,245,246,.92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--hairline);
  }
  .nav .wrap { display: flex; align-items: center; gap: 24px; height: 56px; }
  .logo { display: inline-flex; align-items: center; gap: 9px; color: var(--brand); text-decoration: none; }
  .logo:hover { text-decoration: none; }
  .logo svg { width: 22px; height: 24px; display: block; }
  .wordmark { font-weight: 700; font-size: 18px; letter-spacing: -.04em; line-height: 1; color: var(--brand); }
  .beta { display: inline-flex; align-items: center; height: 18px; padding: 0 6px; border-radius: var(--r-chip); background: var(--accent-sel); color: var(--accent-text); font: 500 10px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; margin-left: 2px; }
  .nav-links { display: flex; gap: 22px; margin-left: 8px; font-size: 14px; }
  .nav-links a { color: var(--ink-body); }
  .nav-links a:hover { color: var(--accent-text); }
  .nav-cta { margin-left: auto; display: flex; gap: 8px; align-items: center; }
  .nav-cta .btn { height: 34px; padding-inline: 12px; font-size: 13px; }
  @media (max-width: 820px) { .nav-links { display: none; } }

  /* hero */
  .hero { padding-block: clamp(48px, 8vw, 104px) clamp(40px, 6vw, 72px); }
  .hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
  @media (max-width: 920px) { .hero .wrap { grid-template-columns: 1fr; } }
  .hero-copy { display: grid; gap: 22px; }
  .hero h1 { text-wrap: initial; }
  .cta-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 6px; }
  .trust { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 13px; color: var(--ink-muted); }
  .trust span::before { content: ""; display: inline-block; width: 4px; height: 4px; border-radius: 1px; background: var(--accent); margin-right: 8px; vertical-align: 2px; }
  .platforms { font-family: var(--mono); font-size: 11px; letter-spacing: .04em; color: var(--ink-muted); }

  /* capture sheet — the one box that earns a shadow: it is the sheet */
  .sheet {
    background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--r-card);
    box-shadow: var(--shadow-sheet); overflow: hidden;
  }
  .sheet-tabs { display: flex; border-bottom: 1px solid var(--hairline); }
  .sheet-tabs button {
    flex: 1; height: 42px; background: transparent; border: 0; font: 500 13px var(--sans); color: var(--ink-muted); cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-bottom: 2px solid transparent; margin-bottom: -1px;
  }
  .sheet-tabs button[aria-selected="true"] { color: var(--accent-text); border-bottom-color: var(--accent); }
  .sheet-tabs .m { font-family: var(--mono); font-size: 11px; width: 18px; height: 18px; border-radius: var(--r-chip); display: inline-grid; place-items: center; background: var(--accent-sel); color: var(--accent-text); }
  .sheet-body { padding: 18px 18px 14px; display: grid; gap: 14px; }
  .capture-input {
    width: 100%; border: 0; outline: 0; background: transparent; resize: none;
    font: 400 20px/1.45 var(--serif); color: var(--ink-body); min-height: 58px; padding: 0;
  }
  .capture-input::placeholder { color: #98A0A6; }
  .parse { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; min-height: 26px; }
  .chip {
    display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 8px; border-radius: var(--r-chip);
    font: 500 12px var(--sans); border: 1px solid var(--hairline); color: var(--ink-body); background: var(--surface);
  }
  .chip.kind { background: var(--accent-sel); border-color: transparent; color: var(--accent-text); font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; }
  .chip.date { font-family: var(--mono); font-size: 11.5px; }
  .chip.tag { border-color: var(--hairline); color: var(--ink-body); }
  .chip.scope { gap: 7px; }
  .chip.scope i { width: 8px; height: 8px; border-radius: 2px; background: var(--p3); }
  .chip.status { background: var(--status-working-bg); color: var(--status-working-fg); border-color: transparent; }
  .chip.synced { background: var(--status-synced-bg); color: var(--status-synced-fg); border-color: transparent; }
  .chip.p1 { color: var(--urgency); border-color: var(--urgency); font-family: var(--mono); font-size: 10.5px; }
  .sheet-foot { display: flex; align-items: center; gap: 8px; padding-top: 12px; border-top: 1px solid var(--hairline-soft); }
  .sheet-foot .attach { font-size: 12.5px; color: var(--ink-muted); }
  .sheet-foot .attach b { font-weight: 500; color: var(--ink-body); }
  .sheet-foot .btn { margin-left: auto; height: 32px; padding-inline: 14px; font-size: 13px; }
  .hint { font-size: 12.5px; color: var(--ink-muted); text-align: center; margin-top: 12px; }
  .hint kbd { background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--r-chip); padding: 1px 5px; font-size: 11px; }

  /* AEO definition */
  .definition { background: var(--surface); }
  .definition .wrap { padding-block: clamp(36px, 5vw, 56px); display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; align-items: start; }
  @media (max-width: 820px) { .definition .wrap { grid-template-columns: 1fr; } }
  .definition p { font-size: clamp(17px, 1.7vw, 21px); line-height: 1.5; color: var(--ink); max-width: 46ch; text-wrap: pretty; }

  /* comparison table */
  .table-wrap { overflow-x: auto; }
  table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
  th, td { text-align: left; vertical-align: top; padding: 14px 16px 14px 0; border-bottom: 1px solid var(--hairline); }
  th { font-family: var(--mono); font-size: 10.5px; letter-spacing: .11em; text-transform: uppercase; color: var(--ink-muted); font-weight: 400; padding-top: 0; }
  td:first-child { font-weight: 600; white-space: nowrap; width: 150px; }
  td:nth-child(2) { color: var(--ink-muted); width: 36%; }
  td:last-child { color: var(--ink-body); }
  tr:last-child td { border-bottom: 0; }

  /* moments (JTBD) */
  .moment { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(24px, 4vw, 64px); padding-block: clamp(36px, 5vw, 56px); border-top: 1px solid var(--hairline); align-items: center; }
  .moment:first-of-type { border-top: 0; padding-top: 0; }
  @media (max-width: 820px) { .moment { grid-template-columns: 1fr; } }
  .moment-copy { display: grid; gap: 12px; }
  .moment-copy h3 { font-size: clamp(20px, 2.2vw, 24px); }
  .moment-copy .body { font-size: 15px; }
  .moment-copy ul { margin: 6px 0 0; padding-left: 18px; color: var(--ink-body); display: grid; gap: 4px; font-size: 14px; }

  /* UI mockups: hairlines, not cards */
  .mock { background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--r-card); overflow: hidden; font-size: 13px; }
  .mock-bar { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-bottom: 1px solid var(--hairline); background: var(--sunken); }
  .mock-bar .label { flex: 1; }
  .mock-bar .meta { margin-left: auto; }
  .row { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-bottom: 1px solid var(--hairline-soft); }
  .row:last-child { border-bottom: 0; }
  .row .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .row .meta { flex-shrink: 0; }
  .cb { width: 14px; height: 14px; border-radius: 3px; border: 1.5px solid #98A0A6; flex-shrink: 0; }
  .cb.p1 { border-color: var(--urgency); }
  .cb.p2 { border-color: var(--p2); }
  .cb.done { background: var(--accent); border-color: var(--accent); }
  .ml { font-family: var(--mono); font-size: 10.5px; width: 16px; height: 16px; border-radius: var(--r-chip); display: inline-grid; place-items: center; background: var(--accent-sel); color: var(--accent-text); flex-shrink: 0; }
  .ml + .ml { margin-left: -6px; }
  .sect { padding: 10px 12px 4px; }
  .agenda .row { padding-block: 7px; }
  .agenda .time { font-family: var(--mono); font-size: 11px; color: var(--ink-muted); width: 44px; flex-shrink: 0; font-variant-numeric: tabular-nums; }
  .agenda .ev { border-left: 3px solid var(--p3); padding-left: 8px; }
  .agenda .ev.block { border-left-color: var(--accent); }
  .now { position: relative; height: 0; border-top: 1px solid var(--urgency); margin: 0 12px; }
  .now::before { content: ""; position: absolute; left: -4px; top: -3.5px; width: 6px; height: 6px; border-radius: 50%; background: var(--urgency); }
  .now span { position: absolute; right: 0; top: -14px; font-family: var(--mono); font-size: 10px; color: var(--urgency); }

  /* proposal card — teal rail + tint, never dashed */
  .proposal { border-left: 3px solid var(--accent); background: var(--accent-tint); padding: 10px 12px 10px 14px; display: grid; gap: 6px; }
  .proposal .title { font-weight: 500; font-size: 14px; }
  .proposal .quote { font-family: var(--serif); color: var(--ink-body); font-size: 13.5px; }
  .proposal .quote .meta { margin-left: 6px; }
  .proposal .actions { display: flex; gap: 6px; margin-top: 4px; }
  .proposal .actions .btn { height: 28px; padding-inline: 10px; font-size: 12.5px; }

  .summary { padding: 12px 12px 4px; display: grid; gap: 6px; }
  .summary .serif { font-size: 14px; line-height: 1.55; }
  .player { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-top: 1px solid var(--hairline-soft); }
  .play { width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: 10px; flex-shrink: 0; }
  .wave { flex: 1; height: 22px; display: flex; align-items: center; gap: 2px; }
  .wave i { flex: 1; background: var(--hairline); border-radius: 1px; height: var(--h, 40%); }
  .wave i:nth-child(-n+14) { background: var(--accent); }

  /* ink page */
  .ink { display: grid; grid-template-columns: 1fr 1fr; }
  @media (max-width: 480px) { .ink { grid-template-columns: 1fr; } }
  .page { background: #FBFAF6; padding: 12px; border-right: 1px solid var(--hairline); min-height: 190px; position: relative; }
  .page svg { width: 100%; height: auto; display: block; }
  .page .label { position: absolute; left: 12px; bottom: 10px; }
  .recognised { padding: 12px; display: grid; gap: 8px; align-content: start; }
  .recognised .serif { font-size: 13.5px; line-height: 1.5; }
  .recognised .task-from { display: inline-flex; align-items: center; gap: 6px; margin-top: 4px; color: var(--accent-text); font-size: 12.5px; }

  /* features grid (data / byom) */
  .facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--hairline); }
  @media (max-width: 820px) { .facts { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 520px) { .facts { grid-template-columns: 1fr; } }
  .fact { padding: 22px 20px 22px 0; border-bottom: 1px solid var(--hairline); display: grid; gap: 8px; align-content: start; }
  .fact h3 { font-size: 16px; }
  .fact p { color: var(--ink-body); font-size: 14px; }
  .fact code { color: var(--ink-muted); font-size: 12px; }

  .vault { font-family: var(--mono); font-size: 12px; line-height: 1.7; color: var(--ink-body); background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--r-card); padding: 14px 16px; overflow-x: auto; }
  .vault b { font-weight: 500; color: var(--ink); }
  .vault .c { color: var(--ink-muted); }
  .vault .k { color: var(--accent-text); }

  .providers { display: flex; flex-wrap: wrap; gap: 6px; }
  .purpose { display: grid; grid-template-columns: 150px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--hairline); align-items: baseline; font-size: 14px; }
  .purpose:last-child { border-bottom: 0; }
  .purpose .label { padding-top: 2px; }
  .purpose p { color: var(--ink-body); }
  @media (max-width: 480px) { .purpose { grid-template-columns: 1fr; gap: 4px; } }

  /* agents */
  .snippet { background: var(--ink); color: #E3E6E8; border-radius: var(--r-card); padding: 14px 16px; font-family: var(--mono); font-size: 12.5px; line-height: 1.6; display: flex; gap: 12px; align-items: flex-start; }
  .snippet pre { margin: 0; flex: 1; min-width: 0; white-space: pre; overflow-x: auto; }
  .snippet .p { color: #98A0A6; }
  .snippet .a { color: #7FC1BC; }
  .snippet button { flex-shrink: 0; background: transparent; border: 1px solid #3a4046; color: #E3E6E8; border-radius: var(--r-chip); font: 500 11px var(--mono); padding: 4px 8px; cursor: pointer; }
  .snippet button:hover { border-color: #7FC1BC; color: #7FC1BC; }
  .tools { display: flex; flex-wrap: wrap; gap: 6px 10px; font-family: var(--mono); font-size: 12px; color: var(--ink-muted); }
  .tools span { padding: 2px 0; }
  .attrib { display: grid; gap: 0; }
  .attrib .row { padding-block: 9px; }
  .attrib .by { font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-text); }

  /* FAQ */
  .faq { max-width: 760px; }
  .faq details { border-top: 1px solid var(--hairline); }
  .faq details:last-child { border-bottom: 1px solid var(--hairline); }
  .faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; padding: 18px 0; font-weight: 500; font-size: 16px; }
  .faq summary::-webkit-details-marker { display: none; }
  .faq summary::after { content: "+"; font-family: var(--mono); color: var(--ink-muted); flex-shrink: 0; }
  .faq details[open] summary::after { content: "−"; }
  .faq .answer { padding: 0 0 20px; color: var(--ink-body); max-width: var(--measure); font-size: 15px; }
  .faq .answer p + p { margin-top: 8px; }

  /* final CTA */
  .final { background: var(--surface); }
  .final .wrap { padding-block: clamp(56px, 8vw, 96px); display: grid; gap: 20px; justify-items: start; }
  .final h2 { max-width: 16ch; }

  .invite { display: grid; gap: 14px; width: 100%; max-width: 520px; }
  .field { display: grid; gap: 6px; }
  .field label { font-size: 13px; font-weight: 500; }
  .field label .opt { font-weight: 400; color: var(--ink-muted); }
  .field input[type="text"], .field input[type="email"] {
    height: 40px; padding: 0 12px; border: 1px solid var(--hairline); border-radius: var(--r-control); background: var(--surface);
    font: 400 15px var(--sans); color: var(--ink); width: 100%;
  }
  .field input:focus { border-color: var(--accent); outline: 0; box-shadow: 0 0 0 2px var(--accent-sel); }
  .checks { display: flex; flex-wrap: wrap; gap: 6px; }
  .checks label { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 10px; border: 1px solid var(--hairline); border-radius: var(--r-chip); background: var(--surface); font-size: 13px; cursor: pointer; }
  .checks input { accent-color: var(--accent); margin: 0; }
  .checks label:has(input:checked) { border-color: var(--accent); background: var(--accent-tint); color: var(--accent-text); }
  .fine { font-size: 12.5px; color: var(--ink-muted); }
  .success { display: grid; gap: 8px; padding: 16px; border-left: 3px solid var(--accent); background: var(--accent-tint); max-width: 520px; }
  .success b { font-weight: 600; }
  footer { border-top: 1px solid var(--hairline); }
  footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; padding-block: 28px; font-size: 13px; color: var(--ink-muted); }
  footer .logo .wordmark { font-size: 15px; }
  footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
  footer nav a { color: var(--ink-muted); }
  footer .right { margin-left: auto; font-family: var(--mono); font-size: 11px; }
  footer .tm { flex-basis: 100%; font-size: 12px; color: var(--ink-muted); max-width: var(--measure); }


  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
  }