/* style.css — BT Printer
   v1.0.0 — 2026-09-26 — first version, mobile first, light/dark
   v1.2.0 — 2026-09-26 — Fun tab: block cards, drawing and emoji pickers
   v1.3.0 — 2026-09-26 — Frame tab: frame picker grid */

:root {
  --bg: #f4f6f9; --card: #fff; --fg: #1b2330; --muted: #5d6b7e; --line: #d7dde6;
  --accent: #1f3a5f; --accent-fg: #fff; --ok: #1e9e5a; --bad: #c0392b; --warn-bg: #fff3cd;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11161d; --card: #1a212b; --fg: #e6ebf2; --muted: #9aa7b8; --line: #2c3645;
          --accent: #5b8fd6; --accent-fg: #0b1320; --warn-bg: #4a3d12; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.4 system-ui, sans-serif; background: var(--bg); color: var(--fg); }
header { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between;
  gap: 8px; padding: 10px 16px; background: var(--accent); color: #fff; }
header h1 { font-size: 18px; margin: 0; }
.conn { display: flex; align-items: center; gap: 8px; font-size: 14px; min-width: 0; }
#deviceName { max-width: 40vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.dot.on { background: var(--ok); } .dot.off { background: var(--bad); }
.tabs { display: flex; overflow-x: auto; background: var(--card); border-bottom: 1px solid var(--line); }
.tabs button { flex: 1; border: 0; background: none; color: var(--muted); padding: 12px 10px; font-size: 15px; border-bottom: 3px solid transparent; border-radius: 0; }
.tabs button.active { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }
main { padding: 16px; max-width: 700px; margin: 0 auto; }
.tab { display: none; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.tab.active { display: block; }
label { display: block; margin-bottom: 12px; font-size: 14px; color: var(--muted); }
input, select, textarea { display: block; width: 100%; margin-top: 4px; padding: 10px; font: inherit; font-size: 16px;
  color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
input[type=checkbox] { display: inline; width: auto; margin: 0 6px 0 0; }
input[type=range] { padding: 0; }
textarea { font-family: ui-monospace, monospace; font-size: 14px; }
#txtValue { font-family: inherit; font-size: 16px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.row > label, .row > input { flex: 1 1 120px; }
.row.between { justify-content: space-between; align-items: center; }
label.check { display: flex; align-items: center; padding-bottom: 10px; color: var(--fg); }
button { font: inherit; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--fg); cursor: pointer; }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600; }
header button.primary { background: #fff; color: #1f3a5f; border-color: #fff; }
button.big { width: 100%; padding: 16px; font-size: 18px; margin-top: 12px; }
button:disabled { opacity: .5; }
.preview { margin-top: 16px; }
.preview h2 { font-size: 16px; margin: 0; }
.paper { margin-top: 10px; background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: 8px; text-align: center; max-height: 60vh; overflow: auto; }
.paper canvas { max-width: 100%; image-rendering: pixelated; }
.progress { height: 6px; background: var(--line); border-radius: 3px; margin-top: 10px; overflow: hidden; }
#progressBar { height: 100%; width: 0; background: var(--ok); transition: width .1s; }
.hint { font-size: 13px; color: var(--muted); margin-top: 0; }
code { font-size: 12px; }
.warn { background: var(--warn-bg); padding: 12px 16px; font-size: 14px; }
.log { margin-top: 16px; font-size: 13px; }
.log pre { white-space: pre-wrap; word-break: break-all; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px; max-height: 40vh; overflow: auto; }
.hidden { display: none !important; }

/* v1.2.0 — Fun tab */
.blocks { margin: 8px 0; }
.blk { border: 1px solid var(--line); border-radius: 8px; margin-bottom: 10px; background: var(--bg); }
.blk-head { display: flex; justify-content: space-between; align-items: center; padding: 6px 8px; border-bottom: 1px solid var(--line); font-size: 14px; }
.blk-body { padding: 10px; }
.blk-body label { margin-bottom: 8px; }
button.mini { padding: 4px 9px; margin-left: 4px; font-size: 14px; }
button.del { color: var(--bad); }
.add-row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 8px 0 12px; }
.add-row button { padding: 8px 10px; font-size: 14px; }
.clip-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(48px, 1fr)); gap: 6px; margin-bottom: 10px; }
.clip { padding: 4px; background: #fff; border: 2px solid var(--line); aspect-ratio: 1; }
.clip svg { width: 100%; height: 100%; display: block; }
.clip.on { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
.emoji-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); gap: 4px; margin: 4px 0 10px; }
.emo { padding: 4px; font-size: 22px; line-height: 1.2; }

/* v1.3.0 — Frame tab */
.frame-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 8px; margin: 4px 0 14px; }
.frm { padding: 4px; background: #fff; border: 2px solid var(--line); display: flex; flex-direction: column; align-items: center; gap: 2px; color: #1b2330; font-size: 12px; }
.frm img { width: 100%; display: block; }
.frm.on { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }