:root {
  --ink: #1b1b1b;
  --muted: #6b6b6b;
  --bg: #f2f0ec;
  --paper: #fffdf8;
  --line: #d8d4cc;
  --accent: #1f6feb;
  --bad: #b3261e;
  --good: #1f7a3d;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8e6e1;
    --muted: #9a958c;
    --bg: #17171a;
    --paper: #211f1c;
    --line: #3a3730;
    --accent: #6ea8fe;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2rem 1rem 4rem;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main {
  max-width: 46rem;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

h1 { font-size: 1.75rem; margin: 0 0 .35rem; letter-spacing: -.02em; }
h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em;
     color: var(--muted); margin: 0 0 .6rem; }

.blurb { margin: 0 0 .9rem; color: var(--muted); max-width: 34rem; }
.muted { color: var(--muted); }

/* -- status pill -------------------------------------------------------- */

.status {
  display: inline-flex; align-items: center; gap: .5rem;
  margin: 0; padding: .3rem .7rem;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: .85rem; background: var(--paper);
}
.status::before {
  content: ""; width: .55rem; height: .55rem; border-radius: 50%;
  background: var(--muted);
}
.status--online::before { background: var(--good); }
.status--offline::before, .status--asleep::before { background: var(--bad); }
.status--pending::before { background: var(--muted); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity: .25; } }

/* -- form --------------------------------------------------------------- */

form { display: grid; gap: 1.1rem; }

.field { display: grid; gap: .4rem; position: relative; }
.field__label { font-size: .85rem; font-weight: 600; }

textarea, input[type="text"] {
  width: 100%;
  padding: .7rem .8rem;
  font: 15px/1.5 var(--mono);
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: .5rem;
  resize: vertical;
}
textarea:focus, input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

.counter {
  justify-self: end;
  font: .78rem var(--mono);
  color: var(--muted);
}
.counter.over { color: var(--bad); font-weight: 700; }

button {
  justify-self: start;
  padding: .65rem 1.4rem;
  font: 600 15px system-ui, sans-serif;
  color: #fff; background: var(--accent);
  border: 0; border-radius: .5rem; cursor: pointer;
}
button:hover:not(:disabled) { filter: brightness(1.08); }
button:disabled { background: var(--muted); cursor: not-allowed; opacity: .7; }

.quota { margin: 0; font-size: .85rem; color: var(--muted); }
.error {
  margin: 0; padding: .6rem .8rem;
  border-left: 3px solid var(--bad);
  background: color-mix(in srgb, var(--bad) 8%, transparent);
  color: var(--bad); font-size: .9rem; border-radius: 0 .3rem .3rem 0;
}
.error--ok {
  border-left-color: var(--good); color: var(--good);
  background: color-mix(in srgb, var(--good) 8%, transparent);
}

/* -- receipt preview ---------------------------------------------------- */

.paper {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: .3rem .3rem 0 0;
  padding: 1.2rem 1rem 1.6rem;
  box-shadow: 0 1px 3px rgb(0 0 0 / .08);
}

/* The scroll container is the <pre>, not .paper: .paper__tear sits below the
   bottom edge, so scrolling here would produce a permanent scrollbar. */
.paper pre {
  margin: 0;
  font: 12.5px/1.45 var(--mono);
  white-space: pre;
  color: var(--ink);
  overflow-x: auto;
}

/* GS ! double-width. The printer doubles the cell, so the preview has to as
   well or the centring in the preview won't match the paper. */
.paper .dbl {
  display: inline-block;
  transform: scaleX(2);
  transform-origin: left center;
  font-weight: 700;
}

/* Torn edge along the bottom, the way the cutter leaves it. */
.paper__tear {
  position: absolute; left: 0; right: 0; bottom: -8px; height: 9px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  -webkit-mask-image: repeating-linear-gradient(
    -45deg, #000 0 6px, transparent 6px 12px);
  mask-image: repeating-linear-gradient(
    -45deg, #000 0 6px, transparent 6px 12px);
}

footer {
  font-size: .82rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}
footer p { margin: .35rem 0; max-width: 38rem; }