:root {
  --bg: #1e2329;
  --bg2: #262c34;
  --bg3: #2f3640;
  --line: #3c4450;
  --fg: #e6e9ee;
  --fg2: #a9b1bd;
  --accent: #3d8bfd;
  --accent2: #2f6fd0;
  --warn: #f0b429;
  --err: #ef5350;
  --ok: #43b581;
  --canvas: #3a414c;
  --sel: #1e90ff;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  font-size: 14px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg); overflow: hidden; }
button, input, select, textarea { font: inherit; color: inherit; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex: none; }
[hidden] { display: none !important; }
.grow { flex: 1; }

#app { display: flex; flex-direction: column; height: 100%; height: 100dvh; padding-top: env(safe-area-inset-top); }

/* quick access bar */
.qbar { display: flex; align-items: center; gap: 2px; padding: 4px 8px; background: var(--bg); border-bottom: 1px solid var(--line); min-height: 42px; }
.brand { display: flex; align-items: center; gap: 8px; margin-right: 10px; font-weight: 600; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 6px; background: #c62828; color: #fff; font-weight: 800; }
.qbtn { display: flex; align-items: center; gap: 6px; padding: 6px 9px; border: 0; border-radius: 6px; background: transparent; cursor: pointer; white-space: nowrap; }
.qbtn:hover { background: var(--bg3); }
.qbtn-accent { background: var(--accent2); color: #fff; }
.qbtn-accent:hover { background: var(--accent); }
.qsep { width: 1px; height: 22px; background: var(--line); margin: 0 6px; }
.sync-chip { display: flex; align-items: center; gap: 6px; padding: 4px 10px; border: 1px solid var(--line); border-radius: 20px; background: var(--bg2); cursor: pointer; font-size: 12px; white-space: nowrap; }
.sync-chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--fg2); }
.sync-chip.ok .dot { background: var(--ok); }
.sync-chip.busy .dot { background: var(--accent); animation: pulse 1s infinite; }
.sync-chip.err .dot { background: var(--err); }
.sync-chip.off .dot { background: var(--warn); }
@keyframes pulse { 50% { opacity: .3; } }

/* ribbon */
.ribbon { display: flex; align-items: stretch; gap: 0; background: var(--bg2); border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: thin; }
.rgroup { display: flex; flex-direction: column; border-right: 1px solid var(--line); padding: 4px 6px 0; }
.rgroup-items { display: flex; gap: 2px; flex: 1; align-items: flex-start; }
.rgroup-label { text-align: center; font-size: 11px; color: var(--fg2); padding: 2px 0 3px; border-top: 1px solid var(--line); margin-top: 3px; }
.rbtn { display: flex; flex-direction: column; align-items: center; gap: 3px; min-width: 52px; padding: 5px 4px; border: 1px solid transparent; border-radius: 6px; background: transparent; cursor: pointer; font-size: 11.5px; }
.rbtn svg { width: 26px; height: 26px; stroke-width: 1.5; color: #9ccaff; }
.rbtn:hover { background: var(--bg3); border-color: var(--line); }
.rbtn.active { background: #203a5c; border-color: var(--accent); }
.rprops { display: grid; grid-template-columns: auto auto; gap: 4px 8px; align-items: center; font-size: 12px; padding-top: 2px; }
.rprops select { background: var(--bg3); border: 1px solid var(--line); border-radius: 4px; padding: 3px 4px; }

/* tabs */
.tabs { display: flex; align-items: flex-end; gap: 2px; padding: 4px 6px 0; background: var(--bg); border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; min-height: 34px; }
.tab { display: flex; align-items: center; gap: 8px; padding: 6px 8px 6px 12px; background: var(--bg2); border: 1px solid var(--line); border-bottom: 0; border-radius: 6px 6px 0 0; cursor: pointer; white-space: nowrap; max-width: 220px; font-size: 13px; }
.tab .name { overflow: hidden; text-overflow: ellipsis; }
.tab.active { background: var(--bg3); box-shadow: inset 0 2px 0 var(--accent); }
.tab .x { display: grid; place-items: center; width: 18px; height: 18px; border: 0; border-radius: 4px; background: transparent; cursor: pointer; color: var(--fg2); padding: 0; }
.tab .x:hover { background: var(--line); color: var(--fg); }
.tab .x svg { width: 12px; height: 12px; }
.tab-add { border: 0; background: transparent; padding: 6px 10px; cursor: pointer; font-size: 18px; color: var(--fg2); }
.tab .dirty { width: 7px; height: 7px; border-radius: 50%; background: var(--warn); }

/* work area */
.work { flex: 1; display: flex; min-height: 0; position: relative; }
.side { width: 390px; flex: none; display: flex; flex-direction: column; background: var(--bg2); border-right: 1px solid var(--line); min-height: 0; }
.side.closed { display: none; }
.side-head { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.side-head h2 { margin: 0; font-size: 15px; }
.side-body { flex: 1; overflow-y: auto; padding: 8px 12px 24px; }
.icon-btn { display: grid; place-items: center; width: 32px; height: 32px; border: 0; border-radius: 6px; background: transparent; cursor: pointer; }
.icon-btn:hover { background: var(--bg3); }

.canvas-wrap { flex: 1; position: relative; min-width: 0; background: var(--canvas); }
.canvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; cursor: crosshair; user-select: none; -webkit-user-select: none; }
.canvas .paper { fill: #fff; }
.canvas .paper-shadow { fill: rgba(0, 0, 0, .35); }
.canvas .sel * { stroke: var(--sel) !important; }
.canvas .sel text, .canvas .sel polygon[stroke="none"] { fill: var(--sel) !important; }
.canvas .sel line, .canvas .sel polyline, .canvas .sel polygon:not([stroke="none"]), .canvas .sel circle { stroke-width: .45 !important; }
.canvas .prev * { stroke: #00a86b !important; }
.canvas .prev text, .canvas .prev polygon[stroke="none"] { fill: #00a86b !important; }
.canvas .win { fill: rgba(30, 144, 255, .12); stroke: #1e90ff; }
.canvas .win-cross { fill: rgba(67, 181, 129, .12); stroke: #43b581; stroke-dasharray: 1.5 1; }
.canvas .snapmark { stroke: #ff8c00; fill: none; }
.canvas .cross { stroke: rgba(30, 144, 255, .55); fill: none; }

.banner { position: absolute; top: 8px; left: 50%; transform: translateX(-50%); z-index: 3; display: flex; gap: 10px; align-items: center; background: #3a2f10; border: 1px solid var(--warn); color: #ffe7a3; padding: 6px 10px; border-radius: 8px; font-size: 13px; max-width: calc(100% - 16px); }
.banner button { border: 0; border-radius: 5px; padding: 4px 10px; background: var(--warn); color: #222; cursor: pointer; font-weight: 600; white-space: nowrap; }
.warnings { position: absolute; left: 8px; bottom: 8px; z-index: 3; max-width: min(520px, calc(100% - 16px)); background: rgba(58, 20, 20, .95); border: 1px solid var(--err); color: #ffd4d4; padding: 6px 10px; border-radius: 8px; font-size: 12.5px; }
.warnings div + div { margin-top: 3px; }
.toast { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); z-index: 4; background: #111; border: 1px solid var(--line); padding: 7px 14px; border-radius: 8px; font-size: 13px; max-width: calc(100% - 20px); }
.toast.err { border-color: var(--err); color: #ffd4d4; }

/* command bar */
.cmdbar { background: var(--bg); border-top: 1px solid var(--line); padding: 4px 8px calc(4px + env(safe-area-inset-bottom)); display: flex; flex-direction: column; gap: 4px; }
.cmd-row { display: flex; align-items: center; gap: 6px; }
.prompt { font-size: 13px; color: #cfe3ff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cmd-input { flex: 1; min-width: 0; background: var(--bg2); border: 1px solid var(--line); border-radius: 6px; padding: 7px 10px; font-family: Consolas, "Courier New", monospace; }
.cmd-input:focus { outline: 1px solid var(--accent); }
.cbtn { border: 1px solid var(--line); background: var(--bg3); border-radius: 6px; padding: 7px 12px; cursor: pointer; }
.cbtn-ok { background: var(--accent2); border-color: var(--accent2); color: #fff; }
.toggles { gap: 4px; overflow-x: auto; scrollbar-width: none; }
.tgl { display: flex; align-items: center; gap: 5px; border: 1px solid var(--line); background: var(--bg2); border-radius: 6px; padding: 4px 8px; cursor: pointer; font-size: 12px; white-space: nowrap; color: var(--fg2); }
.tgl svg { width: 16px; height: 16px; }
.tgl.on { background: #203a5c; border-color: var(--accent); color: var(--fg); }
.page-sel { background: var(--bg2); border: 1px solid var(--line); border-radius: 6px; padding: 4px; font-size: 12px; }
.coords { font-family: Consolas, monospace; font-size: 12px; color: var(--fg2); white-space: nowrap; }

/* form */
.fsec { border: 1px solid var(--line); border-radius: 8px; margin: 10px 0; background: var(--bg); }
.fsec > summary { cursor: pointer; padding: 8px 10px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; }
.fsec > summary::after { content: "▾"; color: var(--fg2); }
.fsec:not([open]) > summary::after { content: "▸"; }
.fbody { padding: 4px 10px 10px; }
.frow { display: grid; grid-template-columns: 118px 1fr; gap: 6px; align-items: center; margin: 5px 0; }
.frow label, .flabel { color: var(--fg2); font-size: 12.5px; }
.f-in, .f-sel { width: 100%; min-width: 0; background: var(--bg2); border: 1px solid var(--line); border-radius: 5px; padding: 6px 8px; }
.f-in:focus, .f-sel:focus { outline: 1px solid var(--accent); }
.fgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 10px; }
.fgrid .frow { grid-template-columns: 1fr; gap: 2px; margin: 0; }
.chk { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.chk input { width: 16px; height: 16px; accent-color: var(--accent); }
.seg { display: flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg button { flex: 1; border: 0; background: var(--bg2); padding: 7px 6px; cursor: pointer; font-size: 12.5px; }
.seg button.on { background: var(--accent2); color: #fff; }
.fitting { border-top: 1px dashed var(--line); padding-top: 6px; margin-top: 8px; }
.fitting:first-child { border-top: 0; margin-top: 0; }
.fitting-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 4px; }

.ptable { width: 100%; border-collapse: collapse; }
.ptable th { font-size: 11.5px; color: var(--fg2); font-weight: 500; text-align: left; padding: 2px 3px; }
.ptable td { padding: 2px 3px; }
.ptable td.no { color: var(--fg2); width: 22px; text-align: center; }
.ptable input { width: 100%; background: var(--bg2); border: 1px solid var(--line); border-radius: 5px; padding: 6px; }
.ptable .qty { width: 52px; }
.ptable .act { width: 58px; white-space: nowrap; }
.mini { border: 1px solid var(--line); background: var(--bg3); border-radius: 5px; width: 26px; height: 28px; cursor: pointer; padding: 0; display: inline-grid; place-items: center; }
.mini svg { width: 14px; height: 14px; }
.mini.on { border-color: var(--accent); color: #9ccaff; }
.ov-row td { padding: 2px 3px 8px 25px; }
.ov-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px 8px; background: var(--bg2); border: 1px solid var(--line); border-radius: 6px; padding: 6px; }
.ov-grid label { font-size: 11.5px; color: var(--fg2); display: flex; flex-direction: column; gap: 2px; }
.ov-grid input, .ov-grid select { background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: 4px; }
.btn { border: 1px solid var(--line); background: var(--bg3); border-radius: 6px; padding: 7px 12px; cursor: pointer; }
.btn:hover { border-color: var(--fg2); }
.btn-p { background: var(--accent2); border-color: var(--accent2); color: #fff; }
.btn-d { background: #5a1f1f; border-color: #8a2d2d; }
.btns { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.hint { font-size: 12px; color: var(--fg2); margin: 6px 0; line-height: 1.4; }
textarea.f-in { resize: vertical; min-height: 70px; font-family: Consolas, monospace; }

/* modal */
.modal { position: fixed; inset: 0; z-index: 20; background: rgba(0, 0, 0, .55); display: grid; place-items: center; padding: 16px; }
.modal-box { width: min(560px, 100%); max-height: 90dvh; overflow-y: auto; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.modal-box h3 { margin: 0 0 10px; font-size: 17px; }
.lib-list { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; max-height: 55dvh; overflow-y: auto; }
.lib-item { display: flex; align-items: center; gap: 8px; padding: 8px 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.lib-item:hover { border-color: var(--accent); }
.lib-item .meta { font-size: 12px; color: var(--fg2); }
.lib-item .t { flex: 1; min-width: 0; }
.lib-item .t div { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.err-msg { color: #ffb4b4; font-size: 13px; min-height: 18px; margin-top: 6px; }
.login-box { width: min(380px, 100%); }
.logo-prev { height: 44px; background: #fff; border-radius: 6px; padding: 4px; display: block; margin: 6px 0; }

/* ---------- phone ---------- */
@media (max-width: 800px) {
  :root { font-size: 15px; }
  .brand-name, .qbtn span { display: none; }
  .qbtn-accent span { display: inline; }
  .qbtn { padding: 8px; }
  .qbar { overflow-x: auto; scrollbar-width: none; }
  .brand { margin-right: 4px; }
  .ribbon { padding: 2px 0; }
  .rgroup { padding: 2px 3px 0; }
  .rgroup-label { display: none; }
  .rbtn { min-width: 56px; padding: 6px 2px; font-size: 11px; }
  .rbtn svg { width: 24px; height: 24px; }
  .side { position: absolute; inset: 0; z-index: 10; width: auto; border-right: 0; }
  .toggles .tgl span { display: none; }
  .toggles .tgl { padding: 7px 9px; }
  .toggles .tgl svg { width: 19px; height: 19px; }
  .coords { display: none; }
  .cbtn { padding: 8px 12px; }
  .frow { grid-template-columns: 110px 1fr; }
}
@media (min-width: 801px) {
  .side-close { display: none; }
}