:root {
  --mint: #d5e5db;
  --shell: #b7d0c2;
  --shell-deep: #8fb3a0;
  --ink: #17201b;
  --muted: #4e6157;
  --paper: #fcfcf9;
  --cobalt: #2f45e8;
  --alert: #c8402a;
  --scale: 0.75;           /* preview pixels per printer dot */
  --cm: calc(80px * var(--scale)); /* 203 dpi = 80 dots per cm */
  --ui: "IBM Plex Sans", system-ui, sans-serif;
  --display: "Bricolage Grotesque", var(--ui);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--mint);
  color: var(--ink);
  font: 15px/1.45 var(--ui);
  min-height: 100vh;
}
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 2px; }

/* header */
.bar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 16px;
  padding: 18px clamp(16px, 4vw, 40px);
}
.mark {
  margin: 0; font: 400 clamp(18px, 2.4vw, 24px)/1 var(--display);
  letter-spacing: -0.02em;
}
.mark b { font-weight: 800; }
.mark span { font-weight: 400; color: var(--muted); }
.pill {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 9px 16px; border-radius: 999px; border: 0;
  background: var(--paper); cursor: pointer; font-weight: 500; white-space: nowrap;
  box-shadow: 0 1px 0 var(--shell-deep);
}
.pill .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--shell-deep); }
.pill.on .dot { background: #1f9d55; box-shadow: 0 0 0 3px #1f9d5533; }
.battery { font: 600 12px var(--mono); color: var(--muted); }

.notice {
  margin: 0 clamp(16px, 4vw, 40px) 8px; padding: 12px 16px; border-radius: 12px;
  background: var(--paper); border-left: 4px solid var(--alert);
}

/* layout */
.studio {
  display: grid; grid-template-columns: minmax(300px, 400px) 1fr; gap: clamp(16px, 4vw, 56px);
  padding: 8px clamp(16px, 4vw, 40px) 40px; align-items: start;
}
@media (max-width: 760px) {
  .studio { grid-template-columns: 1fr; }
  :root { --scale: 0.62; }
  .strip-wrap { max-height: none; }
  .pill { padding: 8px 12px; font-size: 14px; }
}

/* composer */
.composer {
  background: var(--paper); border-radius: 20px; padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
  box-shadow: 0 2px 0 var(--shell-deep);
}
.modes { display: grid; grid-template-columns: repeat(3, 1fr); background: var(--mint); border-radius: 12px; padding: 4px; }
.modes button {
  border: 0; background: transparent; padding: 9px 0; border-radius: 9px; cursor: pointer;
  font: 600 14px var(--ui); color: var(--muted);
}
.modes button[aria-selected="true"] { background: var(--paper); color: var(--ink); box-shadow: 0 1px 2px #0002; }
.panel { display: flex; flex-direction: column; gap: 14px; }
.panel[hidden] { display: none; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field > span { font-size: 13px; font-weight: 600; color: var(--muted); }
.field output { font-family: var(--mono); color: var(--ink); }
.field small { font-weight: 400; }
.grow { flex: 1; }
.copies { width: 84px; }
.row .grow input[type="range"] { margin: 12px 0; }
.row { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; }
input[type="text"], input[type="number"], textarea, select {
  width: 100%; padding: 10px 12px; border-radius: 10px;
  border: 1.5px solid var(--shell); background: #fff;
}
textarea { resize: vertical; }
input[type="range"] { accent-color: var(--cobalt); width: 100%; }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; padding-bottom: 10px; cursor: pointer; }
.check input { accent-color: var(--cobalt); width: 17px; height: 17px; }
.drop {
  display: flex; flex-direction: column; gap: 4px; align-items: center; text-align: center;
  padding: 22px 16px; border: 2px dashed var(--shell-deep); border-radius: 14px; cursor: pointer;
  color: var(--muted); font-size: 13px;
}
.drop strong { color: var(--ink); font-size: 15px; }
.drop.over { border-color: var(--cobalt); background: #2f45e80d; }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.divider { height: 1px; background: var(--mint); }

.actions { display: flex; gap: 10px; }
.primary, .ghost {
  border-radius: 12px; padding: 13px 18px; font-weight: 600; cursor: pointer; border: 0;
}
.primary { flex: 1; background: var(--cobalt); color: #fff; font-size: 16px; }
.primary:disabled { background: var(--shell-deep); cursor: progress; }
.ghost { background: var(--mint); }

.log {
  list-style: none; margin: 0; padding: 0; max-height: 132px; overflow: auto;
  font: 12px/1.6 var(--mono); color: var(--muted);
}
.log:empty { display: none; }
.log li.err { color: var(--alert); }

/* stage: the paper strip coming out of the printer */
.stage { display: flex; flex-direction: column; align-items: center; min-width: 0; }
.printer {
  width: calc(384px * var(--scale) + 64px); height: 64px; border-radius: 26px 26px 14px 14px;
  background: linear-gradient(#cfe1d6, var(--shell)); position: relative;
  box-shadow: inset 0 -3px 0 var(--shell-deep), 0 6px 14px -8px #0004;
}
.slot {
  position: absolute; left: 22px; right: 22px; bottom: 14px; height: 8px; border-radius: 4px;
  background: var(--ink); opacity: 0.85;
}
.strip-wrap {
  margin-top: -18px; padding-left: 34px; position: relative;
  max-height: calc(100vh - 220px); min-height: 200px; overflow: auto; padding-bottom: 24px; overscroll-behavior: contain;
}
.strip {
  position: relative; width: calc(384px * var(--scale));
  background: var(--paper); padding-top: 4px;
  filter: drop-shadow(0 6px 10px #0002);
  margin-bottom: 10px;
}
/* torn edge at the bottom */
.strip::after {
  content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 10px; background: var(--paper);
  -webkit-mask: conic-gradient(from 135deg at top, #000 90deg, #0000 0) top / 20px 10px repeat-x;
          mask: conic-gradient(from 135deg at top, #000 90deg, #0000 0) top / 20px 10px repeat-x;
}
/* centimetre ruler alongside the strip */
.strip::before {
  content: ""; position: absolute; top: 4px; bottom: 0; left: -26px; width: 14px;
  background:
    repeating-linear-gradient(var(--muted) 0 1.5px, #0000 1.5px var(--cm)) left / 14px 100%,
    repeating-linear-gradient(var(--shell-deep) 0 1px, #0000 1px calc(var(--cm) / 2)) left / 8px 100%;
  background-repeat: no-repeat;
}
#preview {
  display: block; width: 100%; height: auto;
  image-rendering: pixelated; image-rendering: crisp-edges;
}
.head {
  position: absolute; left: -6px; right: -6px; height: 3px; top: 4px;
  background: var(--cobalt); box-shadow: 0 0 0 4px #2f45e833, 0 0 18px #2f45e8;
  transition: top 0.12s linear;
}
.meta { font: 12px var(--mono); color: var(--muted); margin: 14px 0 0; }

@media (prefers-reduced-motion: reduce) {
  .head { transition: none; }
}

/* stickers */
.stickers { display: flex; flex-wrap: wrap; gap: 6px; margin-top: -4px; }
.stickers button {
  width: 36px; height: 36px; padding: 6px; border-radius: 9px; cursor: pointer;
  border: 1.5px solid var(--shell); background: #fff;
}
.stickers button:hover { border-color: var(--cobalt); }
.stickers img { width: 100%; height: 100%; display: block; }

/* recent texts */
.recent { border-top: 1px solid var(--mint); padding-top: 14px; }
.recent h2 { margin: 0 0 8px; font: 600 13px var(--ui); color: var(--muted); }
.hint { margin: 0; font-size: 13px; color: var(--muted); }
.hint[hidden] { display: none; }
#recent { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
#recent li {
  display: flex; align-items: center; gap: 8px; padding: 8px 8px 8px 12px;
  border-radius: 12px; background: var(--mint);
}
.recent-text { flex: 1; min-width: 0; }
.recent-text strong {
  display: block; font-weight: 600; font-size: 14px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.recent-text span { font: 11px var(--mono); color: var(--muted); }
#recent button {
  border: 0; border-radius: 8px; padding: 6px 9px; cursor: pointer;
  font: 600 12px var(--ui); background: var(--paper);
}
#recent button.again { background: var(--cobalt); color: #fff; }
.undo {
  display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 8px;
  padding: 8px 8px 8px 12px; border-radius: 12px; background: var(--ink); color: var(--paper); font-size: 13px;
}
.undo[hidden] { display: none; }
.undo button { border: 0; border-radius: 8px; padding: 6px 10px; background: var(--paper); font-weight: 600; cursor: pointer; }