/* โทนเดียวกับแบบ E-03: เทาฟ้าแบบกระดาษเขียนแบบ + น้ำเงินหมึก + ทองแดง · สีวงจรตรงกับแปลน E-02 */
:root {
  --bg: #E8ECF0; --surface: #F8FAFB; --field: #FFFFFF; --ink: #15202C; --muted: #566577; --line: #CBD3DC;
  --accent: #A9531B; --accent-ink: #FFFFFF; --accent-soft: #FBF0E8; --stage: #E1E7ED; --shadow: rgba(21, 32, 44, .14);
  --label-bg: rgba(248, 250, 251, .9); --ok: #1C6B3E; --ok-soft: #E2F1E8; --warn: #7A4F00; --warn-soft: #FCEFD6; --danger: #B42318;
  --wall: #8E9CAD; --wall-edge: #6C7A8B; --floor: #F6F8FA;
  --c-main: #D12A2A; --c-branch: #2150D0; --c-leg: #15964A; --c-drop: #0A8DAE;
  --lamp: #F0BE2A; --jb: #E5860B; --mb: #2E3A48; --device: #FBFCFD; --fcu: #D6DDE5;
  --font-display: "Chakra Petch", "IBM Plex Sans Thai", Tahoma, sans-serif;
  --font-body: "IBM Plex Sans Thai", Sarabun, Tahoma, sans-serif;
  --font-data: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0C131B; --surface: #121C27; --field: #0F1821; --ink: #E3E9EF; --muted: #92A2B3; --line: #243242;
    --accent: #E6955A; --accent-ink: #1A0E05; --accent-soft: #2A1C12; --stage: #0E1720; --shadow: rgba(0, 0, 0, .45);
    --label-bg: rgba(18, 28, 39, .9); --ok: #5FD394; --ok-soft: #12291D; --warn: #F2C266; --warn-soft: #2B2210; --danger: #FF8A80;
    --wall: #7D91A8; --wall-edge: #4C5F75; --floor: #16212D;
    --c-main: #FF6060; --c-branch: #6E97FF; --c-leg: #42CF7E; --c-drop: #2EC6E8;
    --lamp: #FFD54A; --jb: #FFA83D; --mb: #A3B1C1; --device: #DCE3EA; --fcu: #8C9AAA;
    color-scheme: dark;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--font-body); font-size: 15px; line-height: 1.5; -webkit-text-size-adjust: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }
.sheet { font-family: var(--font-data); font-size: 11.5px; letter-spacing: .06em; border: 1.5px solid var(--ink); border-radius: 3px; padding: 0 6px; }
.brand-mark { width: 40px; height: 40px; border-radius: 9px; background: #15202C; display: flex; align-items: center; justify-content: center; flex: none; }
.mono { font-family: var(--font-data); font-variant-numeric: tabular-nums; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 16px; border-radius: 10px;
       border: 1px solid var(--line); background: var(--surface); color: var(--ink); text-decoration: none; font-weight: 500; cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.dark { background: var(--ink); border-color: var(--ink); color: var(--surface); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); border-color: var(--danger); background: transparent; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.chip { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; min-height: 36px; padding: 0 11px; border-radius: 999px;
        border: 1px solid var(--line); background: var(--bg); color: var(--ink); cursor: pointer; }
.chip i { width: 15px; height: 5px; border-radius: 3px; background: var(--sw); }
.chip[aria-pressed="false"] { background: transparent; color: var(--muted); }
.chip[aria-pressed="false"] i { background: transparent; box-shadow: inset 0 0 0 1.5px var(--sw); }
.views { display: flex; gap: 3px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 3px; box-shadow: 0 4px 14px var(--shadow); }
.views button { font-size: 13px; min-height: 36px; padding: 0 10px; border-radius: 7px; border: 0; background: transparent; color: var(--ink); cursor: pointer; }
.views button[aria-pressed="true"] { background: var(--ink); color: var(--surface); }
.info { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 10px 28px var(--shadow); padding: 10px 12px 12px; }
.info-h { display: flex; align-items: center; gap: 9px; }
.info-h i { flex: none; width: 16px; height: 6px; border-radius: 3px; background: var(--sw, var(--accent)); }
.info-h b { font-family: var(--font-display); font-weight: 600; font-size: 15.5px; line-height: 1.3; flex: 1; min-width: 0; }
.info .x { width: 36px; height: 36px; margin: -6px -6px -6px 0; border: 0; border-radius: 8px; background: transparent; color: var(--muted); font-size: 22px; line-height: 1; cursor: pointer; }
.info dl { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 2px 14px; margin: 6px 0 0; font-size: 13.5px; }
.info dt { color: var(--muted); }
.info dd { margin: 0; font-variant-numeric: tabular-nums; }