/* Layout: one road, three ways to look at it. Top bar with the view switch, a stage (canvas + HUD),
   a right-hand field guide with tabs, and a rail along the bottom that maps the road.
   Deliberately single-theme: asphalt dark, so light trails, forces and glowing brakes read clearly. */
:root{
  color-scheme:dark;
  --bg:#0A0D11; --panel:#0F141A; --chip:#161D26; --rule:#212B37; --edge:#324154; --glass:rgba(10,14,19,.82);
  --ink:#E8EDF2; --muted:#8C9AA9; --faint:#566474;
  --amber:#FFB02E; --cyan:#3FD0E6; --green:#52E08A; --red:#FF5C4D; --violet:#A98BFF; --blue:#5B9DFF;
  --display:"Barlow Condensed","Arial Narrow",system-ui,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font:0.9375rem/1.55 var(--body);-webkit-font-smoothing:antialiased;overflow:hidden}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:0.25rem}
.app{height:100%;display:grid;grid-template-rows:auto minmax(0,1fr) auto}
.top{display:flex;align-items:center;gap:0.75rem;padding:0.5rem 1rem;border-bottom:1px solid var(--rule);flex-wrap:wrap;background:linear-gradient(180deg,#121922,var(--bg))}
.brand{font:700 1.625rem/1 var(--display);letter-spacing:.01em;margin:0;text-transform:uppercase;white-space:nowrap}
.brand span{color:var(--amber)}
.tag{font:500 0.6875rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-right:auto}
.seg{display:flex;border:1px solid var(--rule);border-radius:62.4375rem;padding:0.1875rem;gap:2px;background:var(--panel)}
.seg button{border:0;background:none;padding:0.4375rem 0.875rem;border-radius:62.4375rem;cursor:pointer;color:var(--muted);font:600 0.875rem/1 var(--display);letter-spacing:.04em;text-transform:uppercase;white-space:nowrap}
.seg button i{font:500 0.625rem var(--mono);font-style:normal;opacity:.6;margin-right:0.25rem}
.seg button[aria-selected="true"],.seg button[aria-pressed="true"]{background:var(--amber);color:#1a1200}
.seg.small button{padding:0.375rem 0.6875rem;font-size:0.8125rem}
.sel{display:flex;align-items:center;gap:0.5rem;font:500 0.6875rem var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.sel select{background:var(--panel);border:1px solid var(--rule);border-radius:0.5rem;padding:0.375rem 0.5rem;font:500 0.875rem var(--body);text-transform:none;letter-spacing:0;color:var(--ink);max-width:13.125rem}
.main{display:grid;grid-template-columns:minmax(0,1fr) 23.75rem;min-height:0}
.stage{position:relative;min-width:0;min-height:0;overflow:hidden;background:#05070a}
#cv,.hud-cv{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}
#cv{cursor:grab} #cv.drag{cursor:grabbing}
.hud-cv{pointer-events:none}
.hud-section{position:absolute;left:0.875rem;top:0.75rem;width:min(20.625rem,calc(50% - 10.625rem));min-width:13.125rem;background:var(--glass);border:1px solid var(--rule);border-radius:0.625rem;padding:0.5rem 0.75rem;backdrop-filter:blur(0.375rem);-webkit-backdrop-filter:blur(0.375rem);z-index:3}
.hud-section small{display:block;font:500 0.625rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:2px}
.hud-section b{font:600 1.1875rem/1.1 var(--display);letter-spacing:.02em;text-transform:uppercase}
.hud-section p{margin:0.1875rem 0 0;font-size:0.7812rem;line-height:1.35;color:var(--muted)}
.hud-gauges{position:absolute;right:0.75rem;top:0.625rem;display:grid;grid-template-columns:auto auto 1fr;gap:2px 0.625rem;align-items:end;background:var(--glass);border:1px solid var(--rule);border-radius:0.75rem;padding:0.5rem 0.625rem;z-index:3;width:min(14.375rem,44%);backdrop-filter:blur(0.375rem);-webkit-backdrop-filter:blur(0.375rem)}
.speedo b{font:700 2.25rem/1 var(--display)} .gear b{font:700 1.625rem/1 var(--display);color:var(--amber)}
.speedo small,.gear small{display:block;font:500 0.5625rem var(--mono);letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.rpm{height:0.5rem;border-radius:0.3125rem;background:var(--rule);overflow:hidden;align-self:center}
.rpm i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--green),var(--amber) 70%,var(--red))}
#ggCv{grid-column:1/-1;width:100%;max-width:7.5rem;justify-self:center;aspect-ratio:1;margin-top:2px}
.hud-chips{position:absolute;left:0.75rem;bottom:0.75rem;display:flex;flex-wrap:wrap;gap:0.375rem;max-width:calc(100% - 21.875rem);z-index:3}
.chip{border:1px solid var(--rule);background:var(--glass);color:var(--muted);border-radius:62.4375rem;padding:0.3125rem 0.6875rem;font:500 0.75rem/1 var(--body);cursor:pointer;backdrop-filter:blur(0.375rem);-webkit-backdrop-filter:blur(0.375rem);display:flex;align-items:center;gap:0.375rem}
.chip::before{content:"";width:0.5rem;height:0.5rem;border-radius:50%;background:var(--edge)}
.chip[aria-pressed="true"]{color:var(--ink);border-color:var(--c,var(--amber))}
.chip[aria-pressed="true"]::before{background:var(--c,var(--amber));box-shadow:0 0 0.5rem var(--c,var(--amber))}
.hud-cam{position:absolute;right:0.75rem;bottom:0.75rem;display:flex;gap:0.375rem;z-index:3}
.hud-cam button{min-width:2.125rem;height:2rem;border-radius:0.5rem;border:1px solid var(--rule);background:var(--glass);cursor:pointer;padding:0 0.5625rem;font:500 0.75rem var(--mono);color:var(--muted)}
.hud-cam button:hover,.hud-cam button[aria-pressed="true"]{color:var(--ink);border-color:var(--cyan)}
.hud-text{position:absolute;left:50%;transform:translateX(-50%);bottom:3.5rem;width:min(40rem,calc(100% - 28rem));background:var(--glass);border:1px solid var(--rule);border-radius:0.75rem;padding:0.5rem 0.875rem;font:500 0.9375rem/1.35 var(--body);text-align:center;z-index:2;backdrop-filter:blur(0.375rem);-webkit-backdrop-filter:blur(0.375rem);min-height:2.5rem}
.hud-text small{display:block;font:500 0.625rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:2px}
.hud-text .a{color:var(--amber);font-weight:600}.hud-text .g{color:var(--green);font-weight:600}.hud-text .r{color:var(--red);font-weight:600}.hud-text .c{color:var(--cyan);font-weight:600}
.toast{position:absolute;left:50%;top:4.75rem;transform:translate(-50%,-8px);background:var(--amber);color:#1a1200;font:600 0.875rem var(--body);padding:0.4375rem 0.875rem;border-radius:62.4375rem;opacity:0;pointer-events:none;transition:.25s;z-index:5}
.toast.on{opacity:1;transform:translate(-50%,0)}
.hint{position:absolute;right:0.875rem;bottom:3.25rem;font:500 0.6875rem/1.4 var(--mono);color:var(--faint);pointer-events:none;z-index:2;max-width:18.75rem;text-align:right}
/* right panel */
.panel{border-left:1px solid var(--rule);background:var(--panel);display:grid;grid-template-rows:auto minmax(0,1fr);min-height:0}
.tabs{display:flex;border-bottom:1px solid var(--rule)}
.tabs button{flex:1;background:none;border:0;border-bottom:2px solid transparent;padding:0.6875rem 0.5rem;cursor:pointer;color:var(--muted);font:600 0.9375rem/1 var(--display);letter-spacing:.06em;text-transform:uppercase}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--amber)}
.p-scroll{overflow-y:auto;padding:0.875rem 1rem 2.5rem;min-height:0;scrollbar-width:thin}
.p-scroll h2{font:700 1.25rem/1.1 var(--display);letter-spacing:.03em;text-transform:uppercase;margin:1.25rem 0 0.5rem;color:var(--amber)}
.p-scroll h2:first-child{margin-top:0}
.p-scroll h3{font:600 1.0625rem/1.2 var(--display);letter-spacing:.03em;text-transform:uppercase;margin:0 0 0.25rem}
.p-scroll p{margin:0 0 0.625rem;color:#C6D0DA}
.p-scroll .lead{color:var(--ink);font-size:1rem}
.card{border:1px solid var(--rule);border-radius:0.75rem;background:var(--chip);margin:0 0 0.5rem;overflow:hidden}
.card>summary{list-style:none;cursor:pointer;padding:0.6875rem 0.8125rem;display:flex;align-items:center;gap:0.625rem;font:600 1rem/1.15 var(--display);letter-spacing:.03em;text-transform:uppercase}
.card>summary::-webkit-details-marker{display:none}
.card>summary::after{content:"+";margin-left:auto;color:var(--muted);font:500 1.125rem var(--mono)}
.card[open]>summary::after{content:"–"}
.card>summary .dot{width:0.625rem;height:0.625rem;border-radius:50%;flex:none}
.card .body{padding:0 0.8125rem 0.75rem}
.card .body p{font-size:0.875rem;margin:0 0 0.5rem}
.card .body ul{margin:0 0 0.5rem;padding-left:1.125rem;font-size:0.875rem;color:#C6D0DA}
.card .body li{margin:2px 0}
.btn{border:1px solid var(--edge);background:var(--chip);color:var(--ink);border-radius:0.5rem;padding:0.4375rem 0.75rem;cursor:pointer;font:500 0.8125rem var(--body)}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--amber);border-color:var(--amber);color:#1a1200;font-weight:600}
.btn.cy{border-color:var(--cyan);color:var(--cyan)}
.row{display:flex;gap:0.5rem;flex-wrap:wrap;margin:0.5rem 0}
.kv{display:grid;grid-template-columns:auto 1fr;gap:2px 0.625rem;font:0.75rem/1.5 var(--mono);color:var(--muted);margin:0.375rem 0}
.kv b{color:var(--ink);font-weight:500;text-align:right}
.tbl{width:100%;border-collapse:collapse;font-size:0.8125rem;margin:0.375rem 0 0.625rem}
.tbl th,.tbl td{border-bottom:1px solid var(--rule);padding:0.3125rem 0.375rem;text-align:left;vertical-align:top}
.tbl th{font:500 0.625rem var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.slider{display:grid;grid-template-columns:1fr auto;gap:2px 0.5rem;margin:0.4375rem 0;font-size:0.8125rem;color:#C6D0DA}
.slider input{grid-column:1/-1;width:100%;accent-color:var(--amber)}
.slider output{font:500 0.75rem var(--mono);color:var(--amber)}
.slider .h{grid-column:1/-1;font-size:0.75rem;color:var(--faint);line-height:1.35}
.sel-row{display:grid;grid-template-columns:6.875rem 1fr;gap:0.375rem 0.625rem;align-items:center;margin:0.375rem 0;font-size:0.8125rem}
.sel-row select{background:var(--bg);border:1px solid var(--rule);border-radius:0.5rem;padding:0.375rem 0.5rem;width:100%}
.sel-row .lbl{color:var(--muted);font:500 0.6875rem var(--mono);text-transform:uppercase;letter-spacing:.06em}
.pills{display:flex;flex-wrap:wrap;gap:0.375rem;margin:0.375rem 0 0.625rem}
.pills button{border:1px solid var(--rule);background:var(--bg);color:var(--muted);border-radius:62.4375rem;padding:0.3125rem 0.6875rem;cursor:pointer;font:500 0.7812rem var(--body)}
.pills button[aria-pressed="true"]{border-color:var(--amber);color:var(--ink);background:rgba(255,176,46,.08)}
.meter{height:0.625rem;border-radius:0.375rem;background:linear-gradient(90deg,var(--blue),#2a3340 50%,var(--red));position:relative;margin:0.375rem 0 2px}
.meter i{position:absolute;top:-3px;width:0.25rem;height:1rem;border-radius:2px;background:#fff;left:50%;transform:translateX(-50%)}
.meter-l{display:flex;justify-content:space-between;font:500 0.625rem var(--mono);color:var(--muted);text-transform:uppercase}
.lesson{border:1px solid var(--rule);border-radius:0.75rem;padding:0.75rem 0.8125rem;margin:0 0 0.625rem;background:var(--chip)}
.lesson .n{font:600 0.6875rem var(--mono);color:var(--amber);letter-spacing:.1em}
.lesson h3{margin:2px 0 0.25rem}
.lesson .watch{border-left:2px solid var(--cyan);padding:2px 0 2px 0.625rem;margin:0.5rem 0;font-size:0.8438rem;color:#C6D0DA}
/* rail */
.rail{display:flex;align-items:center;gap:0.75rem;padding:0.5rem 0.875rem;border-top:1px solid var(--rule);background:var(--panel);flex-wrap:wrap}
.play{width:2.125rem;height:2.125rem;border-radius:50%;border:1px solid var(--edge);background:var(--chip);cursor:pointer;display:grid;place-items:center;padding:0;flex:none}
.play svg{width:0.875rem;height:0.875rem}
.track{position:relative;flex:1 1 17.5rem;height:1.875rem;min-width:10rem;cursor:pointer}
.segs{position:absolute;left:0;right:0;top:0.375rem;height:1.125rem;display:flex;gap:2px;border-radius:0.3125rem;overflow:hidden}
.segs i{height:100%;background:#26323f;position:relative;min-width:2px}
.segs i[data-k="bend"]{background:#3d4f75}.segs i[data-k="hill"]{background:#4c6a48}.segs i[data-k="dip"]{background:#6a5a3a}.segs i[data-k="wet"]{background:#2d6b78}.segs i[data-k="rough"]{background:#6b4a3a}
.segs i.cur{outline:2px solid var(--amber);outline-offset:-2px;z-index:1}
.head{position:absolute;top:2px;width:0.1875rem;height:1.625rem;background:var(--amber);border-radius:2px;box-shadow:0 0 0.5rem var(--amber);pointer-events:none;transform:translateX(-1px)}
.speed{display:flex;gap:0.25rem}
.speed button{border:1px solid var(--rule);background:var(--chip);border-radius:0.4375rem;padding:0.3125rem 0.5625rem;cursor:pointer;font:500 0.75rem var(--mono);color:var(--muted)}
.speed button[aria-pressed="true"]{color:var(--amber);border-color:var(--amber)}
.slim{display:flex;align-items:center;gap:0.375rem;font:500 0.6875rem var(--mono);color:var(--muted);text-transform:uppercase}
.slim input{width:5.625rem;accent-color:var(--amber)} .slim output{color:var(--amber);min-width:1.5rem}
@media (max-width:900px){
  body{overflow:auto}
  .app{height:auto;min-height:100%;grid-template-rows:auto auto auto}
  .main{grid-template-columns:1fr;grid-template-rows:62vh auto}
  .panel{border-left:0;border-top:1px solid var(--rule);min-height:60vh}
  .tag{display:none}.hud-gauges{width:9.375rem;padding:0.375rem}.speedo b{font-size:1.625rem}#ggCv{display:none}
  .hud-section{width:55%}.hud-section p{display:none}.hint{display:none}
  .hud-text{bottom:3.125rem;font-size:0.8125rem}.hud-chips{max-width:calc(100% - 1.25rem);bottom:3.125rem}.hud-cam{top:5.625rem;bottom:auto}
}
@media (prefers-reduced-motion:reduce){.toast{transition:none}}

/* levels of zoom */
.crumbs{position:absolute;left:0.75rem;top:0.6rem;z-index:4;display:flex;align-items:center;flex-wrap:wrap;gap:0.125rem;background:var(--glass);border:1px solid var(--rule);border-radius:0.5rem;padding:0.125rem 0.375rem;font-size:0.8125rem;max-width:calc(100% - 17rem);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.crumbs button{border:0;background:none;padding:0.1875rem 0.375rem;border-radius:0.25rem;cursor:pointer;color:var(--muted)}
.crumbs button:hover{color:var(--ink)}
.crumbs button[aria-current="true"]{color:var(--ink);font-weight:600}
.crumbs .sep{color:var(--edge)}
.hud-section{top:3.4rem}
body[data-level="map"] .hud-section,body[data-level="map"] .hud-gauges,body[data-level="map"] #caption,body[data-level="map"] #camBtns,body[data-level="map"] #hint,
body[data-level="garage"] .hud-section,body[data-level="garage"] .hud-gauges,body[data-level="garage"] #caption,body[data-level="garage"] #camBtns,body[data-level="garage"] #hint{display:none}
.pcard{border:1px solid var(--rule);border-radius:0.75rem;background:var(--chip);padding:0.75rem 0.8125rem;margin:0 0 0.5rem}
.pcard h3{display:flex;align-items:center;gap:0.5rem}
.pcard .dot{width:0.625rem;height:0.625rem;border-radius:50%;flex:none}
.pcard p{font-size:0.875rem;margin:0 0 0.5rem}
.pcard .meta{font:0.6875rem var(--mono);color:var(--muted);letter-spacing:.04em;margin-bottom:0.375rem}
.about svg{width:100%;height:auto;display:block;margin:0.375rem 0}
.about .kv{margin:0.25rem 0 0.5rem}
.pills button.wx[aria-pressed="true"]{border-color:var(--cyan);background:rgba(63,208,230,.1)}
.banner{background:rgba(255,92,77,.1);border:1px solid var(--red);border-radius:0.5rem;padding:0.5rem 0.75rem;font-size:0.875rem;margin:0.5rem 0}

.tabs button[hidden]{display:none}

.card.flash{box-shadow:0 0 0 2px var(--amber)}
.math{margin:0.5rem 0 0.75rem;padding:0.5rem 0.75rem;border-left:3px solid var(--amber);background:rgba(255,176,46,.06);border-radius:0 0.5rem 0.5rem 0}
.math h4{margin:0 0 0.375rem;font:600 0.8125rem var(--display);letter-spacing:.06em;text-transform:uppercase;color:var(--amber)}
.math p{font-size:0.8125rem}
.math .eq{display:block;margin:0.25rem 0;font:500 0.8125rem var(--mono);color:#fff;overflow-x:auto;white-space:nowrap}

.speedo b.alt{font-size:1.125rem;color:var(--muted);margin-top:0.125rem}
.limit{margin-top:0.375rem;display:flex;align-items:center;justify-content:center;font:700 1.125rem var(--display);color:#111;background:#fff}
.limit.round{width:2.5rem;height:2.5rem;border-radius:50%;border:0.25rem solid #d12a2a;box-sizing:border-box}
.limit.rect{width:2.375rem;height:3rem;border:0.125rem solid #111;border-radius:0.25rem;flex-direction:column;font-size:1.25rem;line-height:1}
.limit.rect small{font:700 0.4375rem var(--mono);letter-spacing:.02em}
.limit.over{box-shadow:0 0 0 0.1875rem var(--red)}