/* Keyboard Crayons - a beige dot-matrix printer feeding green-bar tractor paper. Light and dark palettes. */
:root, :root[data-theme="light"] {
  --page: #efe9dc; --card: #fffdf7; --ink: #23211d; --muted: #5f5a50; --line: #d8cfbd; --field: #f5f0e4;
  --accent: #b5402c; --accent-ink: #ffffff; --accent-soft: #f6dfd8;
  --sheet: #fbf8ee; --bar: #e3efdf; --hole: #e2dccb; --hole-edge: #cfc6b1; --sheet-ink: #22201c; --cursor: #b5402c;
  --plastic: #ddd3bd; --plastic-dk: #c3b79c; --slot: #3b372f; --led: #4f9a4a;
  --ok: #2f6b37; --ok-bg: #e2f0e0; --warn: #8a4a10; --warn-bg: #fbecd6; --simp: #6b3f8f; --simp-bg: #efe4f6;
  --shadow: 0 1px 0 rgba(60, 50, 30, 0.08), 0 6px 18px rgba(60, 50, 30, 0.07);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --page: #191815; --card: #23211d; --ink: #ece6d8; --muted: #b4ad9e; --line: #3d3a33; --field: #2c2a25;
    --accent: #e8735c; --accent-ink: #1b1209; --accent-soft: #3e2620;
    --sheet: #1e211c; --bar: #263024; --hole: #14130f; --hole-edge: #3a3830; --sheet-ink: #dfe8d6; --cursor: #e8735c;
    --plastic: #4a4538; --plastic-dk: #39352b; --slot: #0d0c0a; --led: #7fd477;
    --ok: #9bd69a; --ok-bg: #20331f; --warn: #f3bf7e; --warn-bg: #3a2a15; --simp: #d4b2f0; --simp-bg: #33263e;
    --shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 6px 18px rgba(0, 0, 0, 0.25);
  }
}
:root[data-theme="dark"] {
  --page: #191815; --card: #23211d; --ink: #ece6d8; --muted: #b4ad9e; --line: #3d3a33; --field: #2c2a25;
  --accent: #e8735c; --accent-ink: #1b1209; --accent-soft: #3e2620;
  --sheet: #1e211c; --bar: #263024; --hole: #14130f; --hole-edge: #3a3830; --sheet-ink: #dfe8d6; --cursor: #e8735c;
  --plastic: #4a4538; --plastic-dk: #39352b; --slot: #0d0c0a; --led: #7fd477;
  --ok: #9bd69a; --ok-bg: #20331f; --warn: #f3bf7e; --warn-bg: #3a2a15; --simp: #d4b2f0; --simp-bg: #33263e;
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 6px 18px rgba(0, 0, 0, 0.25);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--page); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif; overflow-x: hidden; }
a { color: var(--accent); }
code, pre, .mono { font-family: ui-monospace, Menlo, Consolas, "Courier New", monospace; }
h1, h2, h3, .brand strong { font-family: "American Typewriter", "Courier Prime", "Courier New", ui-monospace, monospace; letter-spacing: -0.01em; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.small { font-size: 0.88rem; }
.muted { color: var(--muted); }

/* Header */
.top { display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--card); border-bottom: 3px solid var(--accent); flex-wrap: wrap; position: sticky; top: 0; z-index: 5; }
.back { text-decoration: none; color: var(--muted); font-size: 0.9rem; }
.brand { display: flex; align-items: center; gap: 8px; font-size: 1.1rem; min-width: 0; }
.logo { width: 28px; height: 28px; flex: none; }
.lg-key { fill: var(--field); stroke: var(--ink); stroke-width: 1.4; }
.lg-cap { stroke: var(--muted); stroke-width: 1.6; stroke-linecap: round; fill: none; }
.lg-cr { fill: var(--accent); stroke: var(--ink); stroke-width: 0.8; stroke-linejoin: round; }
.lg-tip { fill: var(--ink); }
.session { margin-left: auto; display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.chip-s { font-size: 0.85rem; padding: 4px 10px; border-radius: 999px; background: var(--field); border: 1px solid var(--line); }

/* Buttons and fields */
.btn { font: inherit; font-size: 0.9rem; border: 1.5px solid var(--accent); color: var(--accent); background: transparent; border-radius: 7px; padding: 6px 13px; cursor: pointer; text-decoration: none; display: inline-block; line-height: 1.3; min-height: 36px; }
.btn:hover:not(:disabled) { background: var(--accent-soft); }
.btn.solid { background: var(--accent); color: var(--accent-ink); }
.btn.solid:hover:not(:disabled) { background: var(--accent); filter: brightness(1.08); }
.btn.tiny { font-size: 0.82rem; padding: 3px 10px; min-height: 32px; }
.btn.big { font-size: 1.05rem; padding: 9px 20px; }
.btn.on { background: var(--accent); color: var(--accent-ink); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn:focus-visible, .inp:focus-visible, .sw:focus-visible, .paper:focus-visible, .drop:focus-visible, .sample:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.inp { font: inherit; color: var(--ink); background: var(--field); border: 1px solid var(--line); border-radius: 7px; padding: 7px 10px; width: 100%; min-height: 38px; }
textarea.inp { resize: vertical; }
.sel { width: auto; padding: 5px 8px; min-height: 34px; }
.num { width: 4.6em; }
.lab { display: block; font-weight: 600; font-size: 0.9rem; margin: 10px 0 4px; }
.tl { display: inline-flex; align-items: center; gap: 6px; font-size: 0.88rem; flex-wrap: wrap; }
.chk input { width: 18px; height: 18px; accent-color: var(--accent); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 10px; }
.row2 { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; margin-top: 10px; }
.note { background: var(--warn-bg); color: var(--warn); border-radius: 7px; padding: 8px 12px; font-size: 0.9rem; margin: 10px 0 0; }

/* Layout */
main { max-width: 1080px; margin: 0 auto; padding: 8px 16px 24px; }
.hero { padding: 18px 0 6px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; font-weight: 700; color: var(--accent); margin: 0 0 6px; }
.hero h1 { font-size: clamp(1.9rem, 6vw, 3rem); line-height: 1.05; margin: 0 0 10px; overflow-wrap: anywhere; }
.hero .sub { display: block; font-size: clamp(1rem, 3.2vw, 1.3rem); color: var(--muted); font-weight: 400; margin-top: 6px; }
.lede { max-width: 760px; margin: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 16px 0; box-shadow: var(--shadow); min-width: 0; }
.ch { font-size: 1.15rem; margin: 0 0 8px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ch .no { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--ink); color: var(--card); font-size: 0.85rem; flex: none; }
.free, .paid { font-family: system-ui, sans-serif; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; padding: 2px 8px; border-radius: 999px; }
.free { background: var(--ok-bg); color: var(--ok); }
.paid { background: var(--accent-soft); color: var(--accent); }
.bench { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 16px; }
.grid2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 0 16px; }
.withs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
@media (max-width: 900px) { .bench { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 700px) { .grid2, .withs { grid-template-columns: minmax(0, 1fr); } }

/* The printer and the paper */
.printer-card { padding-top: 10px; }
.printer { max-width: 680px; margin: 0 auto -4px; }
.pr-svg { display: block; width: 100%; height: auto; }
.pr-body { fill: var(--plastic); stroke: var(--plastic-dk); stroke-width: 2; }
.pr-lid { fill: var(--plastic-dk); }
.pr-slot { fill: var(--slot); }
.pr-knob { fill: var(--plastic-dk); stroke: var(--slot); stroke-width: 2; }
.pr-led { fill: var(--led); }
.pr-vent { fill: var(--plastic-dk); }
.pr-head { fill: var(--slot); opacity: 0.75; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; margin: 12px 0 10px; }
.tgroup { display: inline-flex; gap: 4px; }
.brush { width: 2.6em; text-align: center; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 1rem; padding: 4px; min-height: 34px; }
.swatches { display: inline-flex; flex-wrap: wrap; gap: 3px; }
.sw { font: 600 0.95rem/1 ui-monospace, Menlo, Consolas, monospace; width: 30px; height: 30px; border: 1px solid var(--line); background: var(--field); color: var(--ink); border-radius: 6px; cursor: pointer; padding: 0; }
.sw.on { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.paperwrap { display: grid; grid-template-columns: 22px minmax(0, 1fr) 22px; background: var(--sheet); border: 1px solid var(--line); border-radius: 4px; max-width: 100%; }
.holes { background-image: radial-gradient(circle at 50% 50%, var(--hole) 0 5px, var(--hole-edge) 5.5px, transparent 6.5px); background-size: 22px 22px; background-repeat: repeat-y; }
.holes.l { border-right: 1px dashed var(--line); }
.holes.r { border-left: 1px dashed var(--line); }
.paper { margin: 0; padding: 12px 10px; font: 14px/18px ui-monospace, Menlo, Consolas, "Courier New", monospace; color: var(--sheet-ink); overflow: auto; max-height: 560px; white-space: pre; cursor: crosshair; touch-action: none; user-select: none; -webkit-user-select: none;
  background-image: repeating-linear-gradient(to bottom, var(--bar) 0 54px, transparent 54px 108px); background-position: 0 12px; background-attachment: local; min-height: 270px; }
.paper.typing { cursor: text; }
.paper .cur { background: var(--cursor); color: var(--sheet); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { background: transparent; color: var(--sheet-ink); outline: 1px solid var(--cursor); } }
@media (prefers-reduced-motion: reduce) { .paper .cur { animation: none; } }
.papertext { font: 14px/18px ui-monospace, Menlo, Consolas, monospace; margin-top: 8px; white-space: pre; overflow: auto; }
.prev { margin: 10px 0 0; padding: 10px; background: var(--sheet); color: var(--sheet-ink); border: 1px dashed var(--line); border-radius: 6px; font: 12px/15px ui-monospace, Menlo, Consolas, monospace; overflow: auto; max-height: 260px; min-height: 60px; white-space: pre; }
.prev.art { font-size: 14px; line-height: 18px; max-height: 420px; }
.prev.out { max-height: 380px; }
.drop { border: 2px dashed var(--line); border-radius: 8px; padding: 14px; text-align: center; background: var(--field); cursor: pointer; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.linkish { color: var(--accent); text-decoration: underline; cursor: pointer; }
input[type="range"] { accent-color: var(--accent); width: 130px; }

/* The sketch */
.samples { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 8px 0 4px; }
.sample { font: inherit; font-size: 0.85rem; border: 1px solid var(--line); background: var(--field); color: var(--ink); border-radius: 999px; padding: 5px 12px; cursor: pointer; min-height: 34px; }
.sample.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.plan { margin-top: 12px; padding: 10px 12px; border-left: 4px solid var(--accent); background: var(--field); border-radius: 0 8px 8px 0; }
.planhead { margin: 0 0 6px; }
.plain { list-style: none; padding: 0; margin: 4px 0; }
.planlist li { padding: 2px 0; font-size: 0.92rem; }
.p-left { color: var(--warn); }
.badge { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.05em; padding: 3px 10px; border-radius: 999px; background: var(--field); color: var(--muted); border: 1px solid var(--line); }
.badge.v-as-asked { background: var(--ok-bg); color: var(--ok); border-color: transparent; }
.badge.v-simplified { background: var(--simp-bg); color: var(--simp); border-color: transparent; }
.progress { margin-top: 12px; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--field); }
.stages { list-style: none; padding: 0; margin: 8px 0; }
.stage { color: var(--muted); padding: 2px 0; }
.stage.done { color: var(--ok); }
.stage.active { color: var(--ink); font-weight: 600; }
.stage-ic { font-family: ui-monospace, monospace; }
.raw { white-space: pre-wrap; background: var(--field); padding: 10px; border-radius: 6px; max-height: 300px; overflow: auto; font-size: 0.8rem; }
.result { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }
.result.empty .rcols, .result.empty #rArt, .result.empty #rRecon { display: none; }
.rhead { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.rhead b { font-family: "American Typewriter", "Courier New", monospace; font-size: 1.1rem; overflow-wrap: anywhere; }
.caption { font-style: italic; margin: 8px 0; }
.rcols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; }
.rcols h3, #rReconH { font-size: 0.95rem; margin: 10px 0 2px; }
.keylist code { background: var(--field); border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; margin-right: 4px; }
.recon { padding-left: 18px; margin: 4px 0; }
.recon li { margin: 3px 0; }
.recon li.ok { color: var(--ok); }
.recon li.warn { color: var(--warn); }
@media (max-width: 560px) { .rcols { grid-template-columns: minmax(0, 1fr); } }

/* Saved, about, footer, toasts */
.saved { list-style: none; padding: 0; margin: 10px 0 0; }
.hrow { display: flex; justify-content: space-between; gap: 10px; align-items: center; padding: 8px 0; border-top: 1px solid var(--line); flex-wrap: wrap; }
.hrow.none { color: var(--muted); font-size: 0.9rem; }
.hinfo { display: flex; flex-direction: column; min-width: 0; }
.hinfo b { overflow-wrap: anywhere; }
.hbtns { display: flex; gap: 6px; }
.about p { max-width: 860px; }
.about code { background: var(--field); padding: 0 4px; border-radius: 3px; }
.foot { max-width: 1080px; margin: 0 auto; padding: 8px 16px 40px; font-size: 0.85rem; color: var(--muted); }
.toasts { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; gap: 6px; z-index: 20; width: min(92vw, 460px); }
.toast { background: var(--ink); color: var(--card); padding: 10px 14px; border-radius: 8px; font-size: 0.9rem; box-shadow: var(--shadow); transition: opacity 0.5s; }
.toast.err { background: var(--accent); color: var(--accent-ink); }
.toast a { color: inherit; font-weight: 700; }
.toast.gone { opacity: 0; }
@media (max-width: 480px) {
  .top { gap: 8px; padding: 8px 12px; }
  .back-t { display: none; }
  .brand { font-size: 1rem; }
  main { padding: 6px 12px 20px; }
  .card { padding: 12px; }
  .paper { font-size: 11.5px; line-height: 15px; padding: 10px 4px; background-image: repeating-linear-gradient(to bottom, var(--bar) 0 45px, transparent 45px 90px); }
}
@media print {
  .top, .hero, .toolbar, .bench, .runcard, .card:not(.printer-card), .foot, .toasts, .printer, #paperHelp, #paperNote { display: none !important; }
  body { background: #fff; }
  .card { border: 0; box-shadow: none; }
  .paperwrap { border: 0; }
  .holes { display: none; }
  .paper { max-height: none; overflow: visible; background: none; color: #000; }
}