/* ============================================================
   RACELINE STUDIO — pit-wall telemetry console
   Palette: asphalt black, graphite panels, signal-cyan accent.
   Semantic colors (radius / speed / rings) carry meaning — see
   tools/RACELINE_EDITOR_SPEC.md §4. Do not repurpose them.
   ============================================================ */

:root {
  /* surfaces */
  --bg:        #0a0c0e;
  --bg-deep:   #07080a;
  --panel:     rgba(18, 22, 26, .88);
  --panel-2:   rgba(26, 31, 37, .92);
  --raised:    #1d242b;
  --hair:      rgba(255, 255, 255, .08);
  --hair-2:    rgba(255, 255, 255, .14);

  /* type */
  --ink:       #e8edf2;
  --ink-2:     rgba(213, 224, 234, .64);
  --ink-3:     rgba(213, 224, 234, .36);

  /* brand accent */
  --acc:       #45e3ff;
  --acc-dim:   rgba(69, 227, 255, .14);
  --acc-glow:  rgba(69, 227, 255, .45);

  /* semantic (meaning-bearing — keep distinguishable) */
  --ok:        #34e07e;
  --warn:      #ffb340;
  --bad:       #ff4d4d;
  --speed-lo:  #34e07e;
  --speed-mid: #ffe14d;
  --speed-hi:  #ff4d4d;
  --cert-pp:   #5b8cff;
  --cert-re:   #ff5b7a;
  --carpet:    #8f7bff;

  --display: "Chakra Petch", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --bar-h: 56px;
  --strip-h: 118px;
  --status-h: 32px;
  --r: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--display);
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
}

/* asphalt: vignette + faint carbon weave + grain */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 0%, transparent 55%, rgba(0,0,0,.55) 100%),
    repeating-linear-gradient(45deg, rgba(255,255,255,.012) 0 2px, transparent 2px 6px),
    repeating-linear-gradient(-45deg, rgba(255,255,255,.012) 0 2px, transparent 2px 6px);
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 60; pointer-events: none; opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

/* ---------------- boot overlay ---------------- */
#boot {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-deep);
}
.boot-logo {
  font-size: 30px; letter-spacing: .14em; font-weight: 400; color: var(--ink-2);
}
.boot-logo b { color: var(--acc); font-weight: 700; margin-left: .35em; }
.boot-bar {
  margin: 26px 0 12px; height: 2px; background: var(--hair);
  border-radius: 1px; overflow: hidden;
}
.boot-bar i {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--acc), #9af2ff);
  box-shadow: 0 0 12px var(--acc-glow);
}
.boot-msg { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: .08em; }

/* ---------------- top bar ---------------- */
#bar {
  position: fixed; inset: 0 0 auto 0; height: var(--bar-h); z-index: 20;
  display: flex; align-items: center; gap: 10px; padding: 0 14px;
  background: linear-gradient(180deg, rgba(22,27,32,.96), rgba(15,18,22,.92));
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--hair);
  /* the control set can outgrow the window (esp. MAP-mode tools) — scroll
     sideways instead of clipping the right-hand buttons off screen */
  overflow-x: auto; overflow-y: hidden; scrollbar-width: none;
}
#bar::-webkit-scrollbar { display: none; }
#bar > * { flex-shrink: 0; }
/* primary actions stay pinned to the right edge while the rest of the
   bar scrolls underneath them */
.bar-actions {
  display: flex; align-items: center; gap: 10px;
  position: sticky; right: 0; margin-left: auto;
  padding: 10px 0 10px 22px; margin-right: -14px;
  padding-right: 14px;
  background: linear-gradient(90deg, transparent,
    rgba(17, 21, 25, .96) 18px);
}
#bar::after { /* accent racing stripe */
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--acc-glow) 18%, transparent 42%);
}
.brand { display: flex; align-items: center; gap: 9px; user-select: none; }
.brand-glyph { width: 24px; height: 24px; color: var(--acc); filter: drop-shadow(0 0 6px var(--acc-glow)); }
.brand-name { font-size: 15px; letter-spacing: .1em; font-weight: 400; color: var(--ink-2); white-space: nowrap; }
.brand-name b { color: var(--ink); font-weight: 700; margin-left: .3em; }
.brand-track {
  font-family: var(--mono); font-size: 10.5px; color: var(--acc);
  border: 1px solid var(--acc-dim); background: var(--acc-dim);
  padding: 2px 8px; border-radius: 99px; letter-spacing: .06em; white-space: nowrap;
}
.vsep { width: 1px; height: 26px; background: var(--hair-2); flex: none; }
.spacer { flex: 1; }

/* segmented mode switch */
.modes {
  display: inline-flex; background: rgba(255,255,255,.05);
  border: 1px solid var(--hair); border-radius: 9px; padding: 2px; gap: 2px;
}
.modes button {
  appearance: none; border: 0; background: transparent; color: var(--ink-2);
  font: 600 11px/1 var(--display); letter-spacing: .1em;
  padding: 8px 12px; border-radius: 7px; cursor: pointer;
  transition: color .15s, background .15s;
}
.modes button:hover { color: var(--ink); }
.modes button.sel {
  background: var(--acc-dim); color: var(--acc);
  box-shadow: inset 0 0 0 1px rgba(69,227,255,.35), 0 0 14px -4px var(--acc-glow);
}

/* buttons */
.btn {
  appearance: none; border: 1px solid var(--hair-2); border-radius: 8px;
  background: rgba(255,255,255,.05); color: var(--ink);
  font: 600 11px/1 var(--display); letter-spacing: .1em;
  padding: 9px 14px; cursor: pointer; white-space: nowrap;
  transition: background .15s, border-color .15s, transform .08s, box-shadow .15s;
}
.btn:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.22); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .35; cursor: not-allowed; }
.btn.primary {
  background: var(--acc); border-color: var(--acc); color: #02161c;
  box-shadow: 0 0 18px -6px var(--acc-glow);
}
.btn.primary:hover { filter: brightness(1.12); }
.btn.icon { padding: 7px 9px; }
.btn.icon svg { width: 15px; height: 15px; display: block; }
.btn.icon.glyph { font-size: 14px; line-height: 15px; padding: 6px 9px; }
.hist { display: inline-flex; gap: 6px; }
.btn.danger { border-color: rgba(255,77,77,.4); color: var(--bad); }
.btn.small { padding: 6px 10px; font-size: 10px; }

/* contextual tool cluster */
.ctx { display: flex; align-items: center; gap: 8px; }
.ctx .seg {
  display: inline-flex; background: rgba(255,255,255,.05);
  border: 1px solid var(--hair); border-radius: 8px; padding: 2px; gap: 2px;
}
.ctx .seg button {
  appearance: none; border: 0; background: transparent; color: var(--ink-2);
  font: 600 10.5px/1 var(--display); letter-spacing: .08em;
  padding: 7px 10px; border-radius: 6px; cursor: pointer; transition: .15s;
}
.ctx .seg button.sel { background: var(--raised); color: var(--ink); }
.ctx label.mini { font-size: 10px; letter-spacing: .1em; color: var(--ink-3); }

/* sliders */
input[type=range] {
  appearance: none; -webkit-appearance: none; width: 110px; height: 3px;
  border-radius: 2px; background: rgba(255,255,255,.16); outline: none; cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px; border-radius: 50%;
  background: var(--ink); border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--hair-2), 0 2px 6px rgba(0,0,0,.5); cursor: pointer;
}

/* line selector */
.line-sel {
  appearance: none; background: rgba(255,255,255,.05); border: 1px solid var(--hair-2);
  color: var(--ink); font: 500 11.5px var(--mono); padding: 8px 26px 8px 10px;
  border-radius: 8px; cursor: pointer; max-width: 210px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5'%3E%3Cpath d='M0 0l4 5 4-5z' fill='%2345e3ff'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 9px center;
}
.line-sel option { background: #14181d; }

/* chips */
.chip {
  display: inline-flex; align-items: baseline; gap: 7px;
  border: 1px solid var(--hair-2); border-radius: 8px; padding: 7px 11px;
  background: rgba(255,255,255,.04);
}
.chip-k { font-size: 9px; letter-spacing: .14em; color: var(--ink-3); font-weight: 600; }
.chip-v { font-family: var(--mono); font-size: 13px; font-weight: 600; color: var(--acc); font-variant-numeric: tabular-nums; }

/* ---------------- canvas ---------------- */
#cv {
  position: fixed; left: 0; top: var(--bar-h);
  z-index: 1; display: block; cursor: crosshair; touch-action: none;
}

/* ---------------- floating cards ---------------- */
.card {
  position: fixed; z-index: 10;
  background: var(--panel);
  backdrop-filter: blur(22px) saturate(150%);
  border: 1px solid var(--hair); border-radius: var(--r);
  box-shadow: 0 20px 60px -18px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.04);
}
#inspector { top: calc(var(--bar-h) + 14px); right: 14px; width: 224px; padding: 14px 16px 12px; }
#legend { right: 14px; bottom: calc(var(--strip-h) + var(--status-h) + 14px); padding: 11px 13px; }

.ins-k { font-size: 9.5px; letter-spacing: .16em; color: var(--ink-3); font-weight: 700; }
.ins-big {
  font-family: var(--mono); font-weight: 600; font-size: 34px; line-height: 1.05;
  margin: 3px 0 2px; letter-spacing: -.01em; font-variant-numeric: tabular-nums;
}
.ins-big .u { font-size: 12px; color: var(--ink-3); font-weight: 400; margin-left: 4px; }
.ins-row {
  display: flex; justify-content: space-between; align-items: baseline;
  border-top: 1px solid var(--hair); padding-top: 7px; margin-top: 8px;
  color: var(--ink-2); font-size: 11.5px;
}
.ins-row b {
  font-family: var(--mono); font-weight: 500; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.ins-row b.bad { color: var(--bad); }
.ins-row b.warn { color: var(--warn); }
.ins-row b.ok { color: var(--ok); }

#legend .it { display: flex; align-items: center; gap: 8px; font-size: 10.5px; color: var(--ink-2); padding: 2.5px 0; }
#legend .sw { width: 16px; height: 3px; border-radius: 2px; flex: none; }
#legend .ring { width: 10px; height: 10px; border-radius: 50%; flex: none; }
#legend .dot { width: 9px; height: 9px; border-radius: 2px; flex: none; }

/* zone inspector widgets */
.z-field { margin-top: 10px; }
.z-field label { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--ink-2); margin-bottom: 5px; }
.z-field label b { font-family: var(--mono); color: var(--acc); }
.z-field input[type=range] { width: 100%; }
.z-check { display: flex; align-items: center; gap: 7px; margin-top: 9px; font-size: 11px; color: var(--ink-2); cursor: pointer; }
.z-check input { accent-color: var(--acc); }

/* ---------------- telemetry strip ---------------- */
#strip {
  position: fixed; left: 0; right: 0; bottom: var(--status-h); height: var(--strip-h);
  z-index: 12; background: linear-gradient(180deg, rgba(13,16,19,.97), rgba(10,12,14,.99));
  border-top: 1px solid var(--hair);
}
.strip-head {
  display: flex; align-items: center; gap: 10px;
  height: 24px; padding: 0 14px; border-bottom: 1px solid rgba(255,255,255,.04);
}
.strip-title { font-size: 9px; letter-spacing: .2em; color: var(--ink-3); font-weight: 700; }
.strip-tag { font-size: 9px; letter-spacing: .12em; font-weight: 600; padding: 1px 7px; border-radius: 99px; }
.tag-v { color: var(--speed-mid); background: rgba(255,225,77,.08); }
.tag-r { color: var(--acc); background: var(--acc-dim); }
.strip-cursor { margin-left: auto; font-family: var(--mono); font-size: 10px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
#stripCv { display: block; width: 100%; height: calc(var(--strip-h) - 24px); cursor: crosshair; }

/* ---------------- status bar ---------------- */
#status {
  position: fixed; left: 0; right: 0; bottom: 0; height: var(--status-h); z-index: 12;
  display: flex; align-items: center; gap: 10px; padding: 0 14px;
  background: var(--bg-deep); border-top: 1px solid var(--hair);
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-2);
}
.led {
  width: 8px; height: 8px; border-radius: 50%; background: var(--ink-3); flex: none;
  transition: background .3s, box-shadow .3s;
}
.led.ok { background: var(--ok); box-shadow: 0 0 8px rgba(52,224,126,.7); }
.led.down { background: var(--bad); box-shadow: 0 0 8px rgba(255,77,77,.7); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .4; } }
.st-sep { width: 1px; height: 14px; background: var(--hair-2); }
.st-job { color: var(--acc); min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.st-prog { width: 110px; height: 3px; border-radius: 2px; background: rgba(255,255,255,.1); overflow: hidden; opacity: 0; transition: opacity .25s; }
.st-prog.on { opacity: 1; }
.st-prog i { display: block; height: 100%; width: 0%; background: var(--acc); box-shadow: 0 0 8px var(--acc-glow); }
.st-save { color: var(--ink-3); }
.st-save.dirty { color: var(--warn); }
.st-hint { color: var(--ink-3); }
.st-hint b { color: var(--ink-2); }

/* ---------------- drawers ---------------- */
.drawer {
  position: fixed; top: calc(var(--bar-h) + 10px); right: 14px; z-index: 30;
  width: 296px; max-height: calc(100vh - var(--bar-h) - var(--strip-h) - var(--status-h) - 30px);
  overflow-y: auto; padding: 16px 18px;
  background: var(--panel-2); backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--hair-2); border-radius: 12px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.85);
  display: none;
}
.drawer.open { display: block; }
.drawer h3 {
  font-size: 10px; letter-spacing: .2em; color: var(--ink-3); font-weight: 700;
  margin-bottom: 14px; display: flex; align-items: center; justify-content: space-between;
}
.drawer h3 .x { cursor: pointer; color: var(--ink-3); font-size: 14px; padding: 0 2px; }
.drawer h3 .x:hover { color: var(--ink); }
.d-field { margin-bottom: 13px; }
.d-field > label { display: flex; justify-content: space-between; align-items: baseline; font-size: 11.5px; color: var(--ink-2); margin-bottom: 6px; }
.d-field > label b { font-family: var(--mono); font-size: 11px; color: var(--acc); }
.d-field input[type=range] { width: 100%; }
.d-field input[type=text], .d-field input[type=number] {
  width: 100%; background: rgba(0,0,0,.3); border: 1px solid var(--hair-2);
  border-radius: 7px; color: var(--ink); font: 500 12px var(--mono);
  padding: 8px 10px; outline: none; transition: border-color .15s;
}
.d-field input[type=text]:focus, .d-field input[type=number]:focus { border-color: var(--acc); }
.d-note { font-size: 10.5px; color: var(--ink-3); line-height: 1.55; border-top: 1px solid var(--hair); padding-top: 10px; margin-top: 4px; }
.d-row { display: flex; gap: 8px; margin-top: 6px; }
.d-row .btn { flex: 1; text-align: center; }
.d-status { font-family: var(--mono); font-size: 10.5px; margin-top: 10px; line-height: 1.5; min-height: 16px; word-break: break-word; }
.d-status.ok { color: var(--ok); }
.d-status.bad { color: var(--bad); }
.d-status.busy { color: var(--acc); }

/* optimizer method cards */
.opt-methods { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }
.opt-m {
  border: 1px solid var(--hair-2); border-radius: 9px; padding: 11px 11px 9px;
  cursor: pointer; transition: border-color .15s, background .15s;
}
.opt-m:hover { background: rgba(255,255,255,.04); }
.opt-m.sel { border-color: var(--acc); background: var(--acc-dim); box-shadow: 0 0 16px -8px var(--acc-glow); }
.opt-m b { display: block; font-size: 11px; letter-spacing: .08em; margin-bottom: 3px; }
.opt-m span { font-size: 9.5px; color: var(--ink-3); line-height: 1.4; display: block; }
.opt-cands { margin-top: 10px; }
.opt-cand {
  display: flex; justify-content: space-between; font-family: var(--mono); font-size: 10.5px;
  color: var(--ink-2); padding: 3px 0; border-bottom: 1px dashed rgba(255,255,255,.06);
}
.opt-cand.best { color: var(--acc); }

/* ---------------- banners + toast ---------------- */
#connBanner {
  position: fixed; top: calc(var(--bar-h) + 10px); left: 50%; transform: translate(-50%, -160%);
  z-index: 40; padding: 9px 16px; border-radius: 9px;
  background: rgba(60, 16, 16, .92); border: 1px solid rgba(255,77,77,.5);
  color: #ffb4b4; font: 600 11.5px var(--display); letter-spacing: .04em;
  opacity: 0; pointer-events: none;
  transition: transform .4s cubic-bezier(.2,.8,.2,1), opacity .3s ease;
  backdrop-filter: blur(10px);
}
#connBanner.on { transform: translate(-50%, 0); opacity: 1; pointer-events: auto; }
#connBanner span { font-family: var(--mono); opacity: .7; margin-left: 8px; }

#restoreBanner {
  position: fixed; top: calc(var(--bar-h) + 10px); left: 50%; transform: translateX(-50%);
  z-index: 39; display: none; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 10px;
  background: var(--panel-2); border: 1px solid var(--acc-dim);
  box-shadow: 0 18px 50px -14px rgba(0,0,0,.8), 0 0 24px -12px var(--acc-glow);
  font-size: 12px; color: var(--ink-2);
  backdrop-filter: blur(20px);
}
#restoreBanner.on { display: flex; }
#restoreBanner b { color: var(--ink); }

#toast {
  position: fixed; bottom: calc(var(--strip-h) + var(--status-h) + 18px); left: 50%;
  transform: translate(-50%, 14px); z-index: 50; opacity: 0; pointer-events: none;
  background: var(--panel-2); border: 1px solid var(--hair-2); border-radius: 10px;
  padding: 11px 18px; font: 500 12.5px var(--display); color: var(--ink);
  box-shadow: 0 18px 44px -10px rgba(0,0,0,.75);
  backdrop-filter: blur(20px); max-width: 60vw; text-align: center;
}
#toast.err { border-color: rgba(255,77,77,.5); color: #ffc4c4; }
#toast.okk { border-color: rgba(52,224,126,.4); }

/* keyboard overlay */
#keysOverlay {
  position: fixed; inset: 0; z-index: 70; display: none;
  background: rgba(5,6,8,.7); backdrop-filter: blur(8px);
  align-items: center; justify-content: center;
}
#keysOverlay.on { display: flex; }
.keys-card {
  background: var(--panel-2); border: 1px solid var(--hair-2); border-radius: 14px;
  padding: 26px 30px; width: 560px; max-width: 90vw;
  box-shadow: 0 40px 120px -30px rgba(0,0,0,.9);
}
.keys-card h2 { font-size: 12px; letter-spacing: .22em; color: var(--acc); margin-bottom: 18px; }
.keys-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 28px; }
.key-row { display: flex; justify-content: space-between; align-items: center; font-size: 11.5px; color: var(--ink-2); padding: 4px 0; }
.key-row kbd {
  font-family: var(--mono); font-size: 10px; color: var(--ink);
  background: rgba(255,255,255,.07); border: 1px solid var(--hair-2);
  border-bottom-width: 2px; border-radius: 5px; padding: 2px 7px;
}

/* inline "what is this?" buttons (inspector headers, drawer titles) */
.info {
  display: inline-flex; align-items: center; justify-content: center;
  width: 15px; height: 15px; margin-left: 7px; padding: 0;
  border-radius: 50%; border: 1px solid var(--hair-2);
  background: none; color: var(--ink-2); cursor: pointer;
  font: italic 700 9.5px Georgia, "Times New Roman", serif;
  vertical-align: 1px; flex: 0 0 auto;
}
.info:hover { color: var(--acc); border-color: var(--acc); }
.drawer h3 .info { margin-left: 8px; }

/* help overlay */
#helpOverlay {
  position: fixed; inset: 0; z-index: 80; display: none;
  background: rgba(5,6,8,.72); backdrop-filter: blur(8px);
  align-items: center; justify-content: center;
}
#helpOverlay.on { display: flex; }
.help-card {
  position: relative; background: var(--panel-2);
  border: 1px solid var(--hair-2); border-radius: 14px;
  padding: 26px 30px; width: 680px; max-width: 92vw;
  max-height: 84vh; overflow-y: auto;
  box-shadow: 0 40px 120px -30px rgba(0,0,0,.9);
}
.help-card h2 {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; letter-spacing: .22em; color: var(--acc);
  margin-bottom: 14px;
}
.help-card h2 .x { cursor: pointer; color: var(--ink-2); font-size: 13px; letter-spacing: 0; }
.help-card h2 .x:hover { color: var(--ink); }
.help-nav { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.help-nav button {
  font-family: var(--mono); font-size: 9px; letter-spacing: .08em;
  color: var(--ink-2); background: rgba(255,255,255,.05);
  border: 1px solid var(--hair); border-radius: 6px;
  padding: 4px 8px; cursor: pointer;
}
.help-nav button:hover { color: var(--acc); border-color: var(--acc); }
.help-sec {
  padding: 12px 14px; margin: 0 -14px;
  border-radius: 10px; border: 1px solid transparent;
}
.help-sec.hl { border-color: var(--acc); background: var(--acc-dim); }
.help-sec h3 {
  font-size: 10.5px; letter-spacing: .14em; color: var(--ink);
  margin-bottom: 8px;
}
.help-sec p {
  font-size: 11.5px; line-height: 1.65; color: var(--ink-2);
  margin-bottom: 8px;
}
.help-sec p:last-child { margin-bottom: 0; }
.help-sec b { color: var(--ink); }
.help-sec code {
  font-family: var(--mono); font-size: 10px; color: var(--acc);
  background: rgba(255,255,255,.05); border-radius: 4px; padding: 1px 4px;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 4px; }
::selection { background: var(--acc-dim); }

/* ── narrow viewports / iframe embeds ───
   The top bar holds ~1700px of controls; below that, decorative items go
   and the bar scrolls horizontally instead of clipping buttons. */
@media (max-width: 1600px) {
  .brand-track { display: none; }
}
@media (max-width: 1280px) {
  .st-hint { display: none; }
  .brand-name { display: none; }
}
@media (max-width: 980px) {
  #legend { display: none; }
}

/* drawer sub-section heading (vehicle geometry) */
.drawer h3.d-sub {
  margin-top: 24px; font-size: 11px; color: var(--ink-3);
  letter-spacing: .16em;
}

/* ── phones (≤ 720px): presentation-first ───
   The canvas + telemetry are the show; editing chrome steps back.
   One finger pans (or drags the line), two fingers pinch-zoom. */
@media (max-width: 720px) {
  :root { --bar-h: 50px; --strip-h: 88px; }
  .line-sel, #fitBtn, .hist, #uploadBtn, .vsep, .ctx { display: none; }
  #bar { gap: 8px; padding: 0 10px; }
  /* phones: the pinned action group would cover the mode tabs — let it
     scroll with the rest of the bar instead */
  .bar-actions {
    position: static; padding: 0; margin-right: 0;
    background: none; gap: 8px;
  }
  .brand-track { display: inline-block; }   /* small + pretty — keep it */
  .modes button { padding: 7px 8px; font-size: 9.5px; letter-spacing: .06em; }
  .btn { padding: 8px 10px; font-size: 10px; }
  .chip { padding: 5px 9px; }
  .chip-v { font-size: 12px; }
  #inspector {
    width: 142px; padding: 10px 12px 8px;
    right: 10px; top: calc(var(--bar-h) + 10px);
  }
  .ins-big { font-size: 22px; }
  .drawer {
    top: auto; left: 10px; right: 10px; width: auto;
    bottom: calc(var(--strip-h) + var(--status-h) + 10px);
    max-height: 46vh;
  }
  .strip-head { padding: 0 10px; }
  #status { padding: 0 10px; font-size: 9.5px; }
  #connBanner { max-width: 92vw; text-align: center; }
  #restoreBanner { left: 10px; right: 10px; transform: none; flex-wrap: wrap; }
  .help-card { padding: 18px 16px; max-height: 88vh; }
  .help-sec { margin: 0; padding: 10px 8px; }
}

@media (max-width: 720px) {
  /* zone/map editing needs the hidden context tools — drop their tabs */
  .modes button[data-mode="carpet"],
  .modes button[data-mode="cert"],
  .modes button[data-mode="map"] { display: none; }
}

/* demo small print (element only exists in the demo build) */
.st-demo { color: var(--ink-3); white-space: nowrap; }
.st-demo b { color: var(--warn); font-weight: 700; letter-spacing: .08em; }
.st-demo a { color: var(--acc); text-decoration: none; }
.st-demo a:hover { text-decoration: underline; }
.st-demo .short { display: none; }
@media (max-width: 720px) {
  .st-demo .long { display: none; }
  .st-demo .short { display: inline; }
}
@media (max-width: 540px) {
  /* tight phones: the demo note outranks the autosave label */
  #autosaveText { display: none; }
}

.st-conn { white-space: nowrap; }