:root {
  --bg: #0e1621;
  --panel: #142130;
  --panel-2: #1b2c3f;
  --line: #2a3f57;
  --text: #e8eef5;
  --muted: #8fa3b8;
  --amber: #f5a623;
  --teal: #2bb3a3;
  --red: #e5484d;
  --green: #4cc38a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Chakra Petch', 'Segoe UI', system-ui, sans-serif;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
}

#app {
  display: grid;
  grid-template-columns: 1fr 264px;
  height: 100vh;
  height: 100dvh;
}

/* ---------- stage ---------- */
#stage { position: relative; min-width: 0; min-height: 0; overflow: hidden; background: #0a1119; }
#game, #classic { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
#classic { display: none; background: #1b1612; }

/* ---------- classic (1982) presentation ---------- */
body.classic #classic { display: block; }
body.classic #app { grid-template-columns: 1fr; }
body.classic #dash, body.classic #roadTag, body.classic #notice { display: none; }
body.classic #toast {
  top: 58%;
  padding: 10px 18px;
  background: #fff;
  color: #000;
  border: 3px solid #000;
  border-radius: 0;
  box-shadow: 0 0 0 3px #fff;
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(11px, 1.5vw, 18px);
  letter-spacing: 0;
  line-height: 1.6;
  text-transform: uppercase;
}
body.classic #toast.bad, body.classic #toast.warn, body.classic #toast.good { color: #000; border-color: #000; }
body.classic .card { border-top-color: var(--green); }

.levels-row { display: flex; align-items: center; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.levels-row label { margin: 0; }
.levels { display: flex; gap: 4px; }
.levels button {
  width: 30px; height: 30px; border-radius: 6px;
  border: 1px solid var(--line); background: #0d1622; color: var(--muted);
  font: 700 13px 'Chakra Petch', sans-serif;
}
.levels button.on { background: var(--teal); border-color: var(--teal); color: #06201c; }
.classic-btn { background: var(--green); color: #06201c; border: 1px solid var(--green); }
.classic-btn:hover { background: #63d99c; }

#roadTag {
  position: absolute; top: 14px; left: 14px;
  padding: 6px 12px;
  background: rgba(14, 22, 33, .72);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: 6px;
  font-weight: 600; font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
  backdrop-filter: blur(4px);
}
#roadTag:empty { display: none; }

#notice {
  position: absolute; top: 14px; right: 14px;
  padding: 6px 12px;
  background: rgba(245, 166, 35, .94);
  color: #1a1206;
  border-radius: 6px;
  font-weight: 700; font-size: 13px; letter-spacing: .1em; text-transform: uppercase;
  opacity: 0; transform: translateY(-6px);
  transition: opacity .25s, transform .25s;
}
#notice.show { opacity: 1; transform: none; }

#toast {
  position: absolute; left: 50%; top: 16%;
  transform: translate(-50%, -8px);
  max-width: min(90%, 520px);
  padding: 10px 20px;
  background: rgba(14, 22, 33, .88);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700; font-size: clamp(14px, 2.2vw, 20px); letter-spacing: .08em; text-transform: uppercase; text-align: center;
  opacity: 0; pointer-events: none;
  transition: opacity .2s, transform .2s;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }
#toast.bad { border-color: var(--red); color: #ffd9da; }
#toast.warn { border-color: var(--amber); color: #ffe7bd; }
#toast.good { border-color: var(--teal); color: #c9f5ee; }

/* ---------- touch controls ---------- */
#touch {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: none; justify-content: space-between; align-items: flex-end;
  padding: 14px; padding-bottom: max(14px, env(safe-area-inset-bottom));
  pointer-events: none;
}
#touch .pad { display: flex; gap: 10px; pointer-events: auto; }
#touch button {
  width: 68px; height: 68px;
  border-radius: 50%;
  border: 2px solid rgba(232, 238, 245, .5);
  background: rgba(14, 22, 33, .5);
  color: var(--text);
  font: 700 13px 'Chakra Petch', sans-serif;
  letter-spacing: .06em;
  touch-action: none;
}
#touch button.gas { border-color: var(--green); color: var(--green); }
#touch button.brake { border-color: var(--red); color: var(--red); }
#touch button.down { background: rgba(232, 238, 245, .25); }
@media (pointer: coarse) { #touch { display: flex; } }

/* ---------- dashboard ---------- */
#dash {
  display: flex; flex-direction: column; gap: 12px;
  padding: 16px 14px;
  background: linear-gradient(180deg, var(--panel) 0%, #0f1a27 100%);
  border-left: 1px solid var(--line);
  overflow: hidden;
}
#dash header { text-align: center; }
h1, h2 { font-weight: 700; letter-spacing: .12em; margin: 0; }
h1 { font-size: 22px; }
h1 span, h2 span { color: var(--amber); }
#dash header p { margin: 2px 0 0; color: var(--muted); font-size: 11px; letter-spacing: .3em; text-transform: uppercase; }

.dials { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.dial {
  background: radial-gradient(circle at 50% 45%, #22364c 0%, #101b28 72%);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 4px;
}
.dial svg { display: block; width: 100%; height: auto; }
.dial.alert { border-color: var(--red); animation: pulse .7s infinite alternate; }
@keyframes pulse { from { box-shadow: 0 0 0 0 rgba(229, 72, 77, 0); } to { box-shadow: 0 0 14px 1px rgba(229, 72, 77, .55); } }

.readouts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.readout, .status {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
}
label { display: block; color: var(--muted); font-size: 10px; letter-spacing: .2em; text-transform: uppercase; }
.odo { font-size: 24px; font-weight: 700; letter-spacing: .08em; color: var(--amber); font-variant-numeric: tabular-nums; }
.odo.dim { color: var(--text); }

.status .row { display: flex; align-items: center; justify-content: space-between; padding: 4px 0; }
.status .row + .row { border-top: 1px solid var(--line); }
#lives { display: flex; gap: 4px; }
#lives i { width: 12px; height: 18px; border-radius: 4px 4px 3px 3px; background: var(--red); display: block; }
#lives i.off { background: #2a3b4e; }
.lamp { font-size: 11px; font-weight: 700; letter-spacing: .12em; padding: 2px 8px; border-radius: 4px; background: #2a3b4e; color: var(--muted); }
.lamp.on { background: rgba(76, 195, 138, .16); color: var(--green); }
.lamp.bad { background: rgba(229, 72, 77, .18); color: var(--red); }

.buttons { margin-top: auto; display: grid; gap: 6px; }
button { font-family: inherit; cursor: pointer; }
.buttons button {
  padding: 8px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--text);
  font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
}
.buttons button:hover { border-color: var(--teal); }

/* ---------- modals ---------- */
.modal {
  position: fixed; inset: 0; z-index: 20;
  display: none; align-items: center; justify-content: center;
  padding: 16px;
  background: rgba(6, 10, 16, .72);
  backdrop-filter: blur(5px);
}
.modal.open { display: flex; }
.card {
  width: min(680px, 100%); max-height: 100%; overflow: auto;
  padding: 26px 28px;
  background: linear-gradient(180deg, #17273a 0%, #111c2a 100%);
  border: 1px solid var(--line);
  border-top: 3px solid var(--amber);
  border-radius: 14px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .55);
  -webkit-user-select: text; user-select: text;
}
.card.small { width: min(420px, 100%); text-align: center; }
.card h2 { font-size: clamp(26px, 5vw, 40px); margin-bottom: 10px; }
.card.small h2 { font-size: 28px; }
.card h3 { margin: 14px 0 6px; font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--teal); }
.card p { margin: 0 0 10px; line-height: 1.55; color: #cdd8e4; font-size: 15px; }
.card a { color: var(--amber); }
.eyebrow { color: var(--teal); font-size: 11px; letter-spacing: .26em; text-transform: uppercase; margin-bottom: 6px; }
.lead { color: var(--text) !important; }
.tip { padding: 10px 12px; background: rgba(43, 179, 163, .1); border-left: 3px solid var(--teal); border-radius: 6px; margin-top: 12px !important; }
.fine { font-size: 12px !important; color: var(--muted) !important; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 22px; }
.card ul { margin: 0; padding: 0; list-style: none; font-size: 14px; color: #cdd8e4; }
.card li { padding: 3px 0; }
.haz b { color: var(--amber); font-weight: 600; }
kbd {
  display: inline-block; min-width: 24px; padding: 1px 6px;
  background: #0d1622; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px;
  font: 600 12px 'Chakra Petch', sans-serif; text-align: center; color: var(--text);
}
.credits li { display: flex; gap: 12px; border-bottom: 1px solid var(--line); padding: 6px 0; }
.credits span { flex: 0 0 150px; color: var(--muted); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.card.small .actions { justify-content: center; }
.actions button {
  padding: 11px 22px; border-radius: 8px;
  font-size: 14px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
}
.primary { background: var(--amber); color: #1a1206; border: 1px solid var(--amber); }
.primary:hover { background: #ffb73d; }
.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.ghost:hover { border-color: var(--teal); }
.result { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0; }
.result > div { background: #0d1622; border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.result strong { font-size: 30px; color: var(--amber); font-variant-numeric: tabular-nums; }

/* ---------- small / portrait screens ---------- */
@media (max-width: 860px), (orientation: portrait) {
  #app { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  #dash {
    flex-direction: row; flex-wrap: wrap; align-items: center; gap: 8px;
    padding: 8px; border-left: 0; border-top: 1px solid var(--line);
  }
  #dash header { display: none; }
  .dials { grid-template-columns: repeat(4, 62px); gap: 4px; }
  .readouts { grid-template-columns: auto auto; }
  .odo { font-size: 17px; }
  .status { display: flex; gap: 10px; padding: 4px 8px; }
  .status .row { flex-direction: column; align-items: flex-start; gap: 2px; padding: 0; }
  .status .row + .row { border-top: 0; }
  .buttons { margin: 0 0 0 auto; grid-auto-flow: column; }
  .buttons button { padding: 6px 8px; font-size: 10px; }
  .grid2 { grid-template-columns: 1fr; }
  .card { padding: 20px 18px; }
  .credits span { flex-basis: 110px; }
}