:root {
  /* light — Theme.swift light column */
  --paper:      #F4F2EB;   /* panel faces */
  --sunk:       #E7E4DA;   /* page ground, sidebar, rows */
  --ink:        #171717;
  --muted:      #6E6C64;
  --border:     #C2BFB2;
  --select:     #B7C3E2;
  --wave:       #4A4E57;
  --playhead:   #64A8DE;
  --sel-block:  #2E3F8E;
  --sel-ink:    #A9BDF2;
  --sel-edge:   #1E2A5E;
  --note:       #FFE75C;
  --note-deep:  #B8890E;
  --heat:       #C8402F;
  --key-white:  #F4F2EB;
  --key-black:  #2B2A26;
  --btn-fill:   #2B2A26;
  --btn-ink:    #F4F2EB;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua",
           Georgia, "Times New Roman", serif;
  /* what the SlowBird name itself is set in — one line to swap. */
  --display: var(--serif);
  --ui: "Lucida Grande", -apple-system, BlinkMacSystemFont, "Segoe UI",
        system-ui, sans-serif;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui,
          "Helvetica Neue", Arial, sans-serif;

  --gutter: clamp(1.25rem, 5vw, 3rem);
  --rule: 1px solid var(--border);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* dark — Theme.swift dark column (Sublime Text "Mariana") */
    --paper:     #3B4754;
    --sunk:      #2E3841;
    --ink:       #D8DEE9;
    --muted:     #8A98A8;
    --border:    #4A5867;
    --select:    #46586E;
    --wave:      #9FB0C0;
    --playhead:  #F9AE58;
    --sel-block: #4A6FA5;
    --sel-ink:   #D6E6FF;
    --sel-edge:  #8FB6E8;
    --note:      #E5C07B;
    --note-deep: #F5DFAE;
    --heat:      #F2705C;
    --key-white: #C6CFD8;
    --key-black: #1E252C;
    --btn-fill:  #D8DEE9;
    --btn-ink:   #1E252C;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--sunk);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.15;
             letter-spacing: -0.01em; margin: 0 0 0.5em; }
p { margin: 0 0 1em; }
a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-color: var(--muted); }
img, svg { max-width: 100%; }
ul { margin: 0 0 1em; padding-left: 1.25em; }
li { margin: 0.35em 0; }
strong { font-weight: 600; }

:focus-visible { outline: 2px solid var(--playhead); outline-offset: 3px; border-radius: 3px; }

.wrap { max-width: 1060px; margin-inline: auto; padding-inline: var(--gutter); }

.skip {
  position: absolute; left: -9999px; top: 0; background: var(--paper);
  padding: 0.6em 1em; border: var(--rule); z-index: 10;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* --- the bird ------------------------------------------------------------ */
.bird { display: block; color: var(--ink); fill: currentColor; }
@media (prefers-color-scheme: dark) { .bird { color: var(--ink); } }

/* --- masthead ------------------------------------------------------------ */
.masthead {
  border-bottom: var(--rule); background: var(--paper);
  position: sticky; top: 0; z-index: 5;
}
.masthead .wrap { display: flex; align-items: center; gap: 1rem;
                  min-height: 58px; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none;
         font-family: var(--display); font-size: 1.3rem; font-weight: 600;
         letter-spacing: -0.01em; }
.brand .bird { width: 30px; }
.nav { margin-left: auto; display: flex; gap: clamp(0.75rem, 2.5vw, 1.6rem);
       font-family: var(--ui); font-size: 0.82rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--ink); text-decoration: underline; }
@media (max-width: 560px) { .nav .opt { display: none; } }

/* --- hero ---------------------------------------------------------------- */
.hero { padding: clamp(2.5rem, 7vw, 4.5rem) 0 clamp(2rem, 5vw, 3rem); }
.hero-grid { display: grid; gap: clamp(1.5rem, 4vw, 3rem);
             grid-template-columns: minmax(0, 1fr); align-items: center; }
@media (min-width: 820px) { .hero-grid { grid-template-columns: 1fr 300px; } }

.hero h1 { margin: 0 0 1rem; }
.wordmark {
  display: block; font-family: var(--display); font-weight: 600;
  font-size: clamp(3.2rem, 11vw, 6rem); line-height: 0.95;
  letter-spacing: -0.025em; margin-bottom: 0.35rem;
}
.hero-sub {
  display: block; font-family: var(--serif); font-weight: 400;
  font-size: clamp(1.1rem, 3.1vw, 1.6rem); line-height: 1.3;
  color: var(--muted); letter-spacing: 0;
}
.lede { font-size: 1.08rem; max-width: 48ch; }
.hero-bird { justify-self: center; width: min(280px, 62vw); }
@media (max-width: 819px) { .hero-bird { display: none; } }

.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center;
           margin: 1.6rem 0 0.9rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.55em;
  font-family: var(--ui); font-size: 0.94rem; font-weight: 500;
  padding: 0.62em 1.15em; border: 1px solid var(--btn-fill); border-radius: 6px;
  background: var(--btn-fill); color: var(--btn-ink); text-decoration: none;
}
.btn:hover { opacity: 0.86; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { background: var(--paper); opacity: 1; }
.btn .apple { width: 0.95em; height: 1.15em; fill: currentColor; flex: none;
              position: relative; top: -0.05em; }
.fineprint { font-family: var(--ui); font-size: 0.8rem; color: var(--muted); margin: 0; }

/* --- panels -------------------------------------------------------------- */
.panel { background: var(--paper); border: var(--rule); border-radius: 8px;
         padding: clamp(1rem, 2.5vw, 1.4rem); }
.panel-sunk { background: var(--sunk); }

.figure { margin: 0; }
.figure figcaption { font-family: var(--ui); font-size: 0.78rem; color: var(--muted);
                     margin-top: 0.7rem; }

/* the LCD readout strip, as in the app's control bar */
.readout { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap;
           font-family: var(--ui); font-size: 0.78rem; color: var(--muted);
           border-top: var(--rule); margin-top: 0.85rem; padding-top: 0.7rem; }
.readout b { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }

/* --- sections ------------------------------------------------------------ */
.section { padding: clamp(2.5rem, 6vw, 4rem) 0; border-top: var(--rule); }
.section > .wrap > h2 { font-size: clamp(1.6rem, 4vw, 2.3rem); }
.eyebrow { font-family: var(--ui); font-size: 0.74rem; letter-spacing: 0.13em;
           text-transform: uppercase; color: var(--muted); margin: 0 0 0.7rem; }
.intro { max-width: 62ch; }

.split { display: grid; gap: clamp(1.5rem, 4vw, 2.75rem); align-items: center; }
@media (min-width: 860px) {
  .split { grid-template-columns: 1fr 1fr; }
  /* prose always comes first in the markup so a phone reads heading-then-figure;
     on a wide screen alternate rows pull the figure back to the left. */
  .split.flip > figure { order: -1; }
}
.split h3 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
.split + .split { margin-top: clamp(2.5rem, 6vw, 4rem); }

/* --- feature grid -------------------------------------------------------- */
.grid { display: grid; gap: 1px; background: var(--border); border: var(--rule);
        border-radius: 8px; overflow: hidden;
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid .cell { background: var(--paper); padding: 1.15rem 1.2rem; }
.grid h3 { font-size: 1.12rem; margin-bottom: 0.35rem; }
.grid p { font-size: 0.94rem; color: var(--muted); margin: 0; }

/* --- steps --------------------------------------------------------------- */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0;
         display: grid; gap: 1px; background: var(--border);
         border: var(--rule); border-radius: 8px; overflow: hidden; }
.steps li { counter-increment: step; background: var(--paper); margin: 0;
            padding: 1rem 1.2rem 1rem 3.4rem; position: relative; }
.steps li::before {
  content: counter(step); position: absolute; left: 1.2rem; top: 1rem;
  font-family: var(--ui); font-size: 0.78rem; font-weight: 600;
  width: 1.55em; height: 1.55em; display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: 50%; color: var(--muted);
}
.steps b { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; }

/* --- keyboard keys ------------------------------------------------------- */
kbd { font-family: var(--ui); font-size: 0.82em; border: var(--rule);
      border-radius: 4px; padding: 0.1em 0.42em; background: var(--sunk);
      color: var(--ink); white-space: nowrap; }

/* --- faq ----------------------------------------------------------------- */
.faq { border: var(--rule); border-radius: 8px; overflow: hidden;
       background: var(--paper); }
.faq details { border-top: var(--rule); }
.faq details:first-child { border-top: 0; }
.faq summary {
  cursor: pointer; padding: 0.95rem 1.2rem; font-family: var(--serif);
  font-size: 1.08rem; font-weight: 600; list-style: none;
  display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--ui); color: var(--muted);
                      font-weight: 400; flex: none; }
.faq details[open] summary::after { content: "\2212"; }
.faq summary:hover { background: var(--sunk); }
.faq .answer { padding: 0 1.2rem 1.1rem; max-width: 68ch; }
.faq .answer p:last-child { margin-bottom: 0; }

/* --- download ------------------------------------------------------------ */
.download-box { display: grid; gap: 1.5rem; align-items: center; }
@media (min-width: 720px) { .download-box { grid-template-columns: 130px 1fr; } }
.download-box .bird { width: 130px; justify-self: center; }
.specs { font-family: var(--ui); font-size: 0.84rem; color: var(--muted);
         display: flex; flex-wrap: wrap; gap: 0.35rem 1.1rem; padding: 0; margin: 0.9rem 0 0;
         list-style: none; }

/* --- footer -------------------------------------------------------------- */
.foot { border-top: var(--rule); padding: 2rem 0 2.5rem;
        font-family: var(--ui); font-size: 0.8rem; color: var(--muted); }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 0.5rem 1.2rem; align-items: center; }
.foot .sep { opacity: 0.5; }
.foot .bird { width: 22px; opacity: 0.75; }

/* --- little mockups of the app's own panels ------------------------------ */
.lib { font-family: var(--ui); font-size: 0.84rem; border: var(--rule);
       border-radius: 6px; overflow: hidden; background: var(--sunk); }
.lib-search, .lib-head {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 0.7rem;
  border-bottom: var(--rule); background: var(--paper);
}
.lib-search { color: var(--ink); }
.lib-search span:first-child { color: var(--muted); font-size: 1rem; }
.lib-head { color: var(--muted); font-size: 0.72rem; font-weight: 600;
            letter-spacing: 0.1em; text-transform: uppercase; }
.lib-head .count { margin-left: auto; letter-spacing: 0; }
.lib-list { list-style: none; margin: 0; padding: 0; }
.lib-list li { display: flex; align-items: center; gap: 0.6rem; margin: 0;
               padding: 0.45rem 0.7rem; border-top: var(--rule); }
.lib-list li:first-child { border-top: 0; }
.lib-list i { flex: none; width: 4px; height: 27px; border-radius: 2px; }
.lib-list div { display: flex; flex-direction: column; line-height: 1.32; min-width: 0; }
.lib-list .t { color: var(--ink); white-space: nowrap; overflow: hidden;
               text-overflow: ellipsis; }
.lib-list .s { color: var(--muted); font-size: 0.75rem; }
.lib-list .time { margin-left: auto; color: var(--muted); font-size: 0.75rem;
                  font-variant-numeric: tabular-nums; flex: none; }
.lib-list li.is-sel { background: var(--select); }
.lib-list li.is-sel .s { color: var(--ink); opacity: 0.72; }

/* --- product screenshots --------------------------------------------------
   The shot already carries the app's own window chrome, so it gets NO panel
   box around it — a frame inside a frame just reads as clutter. A hairline
   keeps the near-white title bar from bleeding into the page. */
.shot-fig { margin: 2rem 0 0; }
.shot { display: block; width: 100%; height: auto;
        border: var(--rule); border-radius: 7px; background: var(--sunk); }
.shot-fig figcaption { max-width: 62ch; }