:root {
  color-scheme: dark;
  --deep: #03080e;
  --panel: #07111f;
  --paper: #edf8ff;
  --muted: #91a8bb;
  --dim: #5f7689;
  --line: rgba(133, 199, 233, 0.24);
  --cyan: #63e6e2;
  --blue: #7ba9ff;
  --violet: #d792ff;
  --danger: #ff7c91;
  --gold: #fff36d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--deep); }
body { color: var(--paper); overflow: hidden; }
button, a { font: inherit; }
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  padding: 0.65rem 0.85rem;
  background: var(--paper);
  color: var(--deep);
  transform: translateY(-180%);
}
.skip-link:focus { transform: none; }

.game-shell {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  min-height: 100svh;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  background:
    radial-gradient(circle at 85% 10%, rgba(45, 73, 142, 0.3), transparent 32rem),
    radial-gradient(circle at 4% 90%, rgba(71, 45, 118, 0.25), transparent 28rem),
    var(--deep);
}

.game-stage {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: min(100%, 760px);
  height: 100svh;
  max-height: 1120px;
  overflow: hidden;
  border-inline: 1px solid var(--line);
  background: rgba(3, 8, 14, 0.94);
  box-shadow: 0 0 80px rgba(40, 95, 140, 0.15);
}

.hud {
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  min-height: 78px;
  padding: 0.75rem clamp(0.85rem, 3vw, 1.5rem);
  border-bottom: 1px solid var(--line);
  background: rgba(3, 8, 14, 0.9);
}

.brand-lockup { display: flex; align-items: center; gap: 0.75rem; min-width: 0; }
.brand-lockup > a {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border: 1px solid var(--line);
  color: var(--cyan);
  font-size: 1.2rem;
  text-decoration: none;
}
.brand-lockup p, .brand-lockup h1, .mission-readout span, .mission-readout strong { margin: 0; }
.brand-lockup p { color: var(--muted); font-size: clamp(0.47rem, 1.7vw, 0.62rem); letter-spacing: 0.1em; text-transform: uppercase; }
.brand-lockup h1 { margin-top: 0.2rem; font-size: clamp(0.82rem, 3vw, 1.08rem); letter-spacing: 0.12em; }
.mission-readout { display: grid; justify-items: end; gap: 0.2rem; flex: none; }
.mission-readout span { color: var(--cyan); font-size: 0.58rem; letter-spacing: 0.16em; }
.mission-readout strong { font-size: clamp(0.9rem, 3vw, 1.2rem); letter-spacing: 0.12em; }

.viewport-wrap { position: relative; min-width: 0; min-height: 0; overflow: hidden; touch-action: none; }
#gameCanvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  background: var(--deep);
  touch-action: none;
  cursor: crosshair;
}
#gameCanvas:focus-visible { outline: 2px solid var(--cyan); outline-offset: -3px; }
.screen-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 70px rgba(0, 0, 0, 0.55);
}

.message-panel {
  position: absolute;
  z-index: 8;
  left: 50%;
  top: 50%;
  width: min(calc(100% - 2rem), 420px);
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.96);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.48);
  transform: translate(-50%, -50%);
}
.message-panel[hidden] { display: none; }
.message-kicker, .message-panel h2, .message-panel > p { margin: 0; }
.message-kicker { color: var(--cyan); font-size: 0.62rem; letter-spacing: 0.16em; }
.message-panel h2 { margin-top: 0.45rem; font: 500 clamp(1.75rem, 7vw, 2.8rem)/1.02 Georgia, serif; }
.message-panel > p:not(.message-kicker) { margin-top: 0.8rem; color: var(--muted); font: 0.9rem/1.55 system-ui, sans-serif; }
.message-actions { display: flex; flex-wrap: wrap; gap: 0.65rem; margin-top: 1.1rem; }

button {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0.65rem 0.85rem;
  background: rgba(9, 22, 36, 0.94);
  color: var(--paper);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}
button.primary { border-color: var(--cyan); background: var(--cyan); color: var(--deep); }
button:disabled { opacity: 0.35; cursor: not-allowed; }
button:hover:not(:disabled), button:focus-visible, a:focus-visible { outline: 2px solid var(--paper); outline-offset: 3px; }

.flight-status {
  position: absolute;
  z-index: 4;
  top: 0.75rem;
  left: 0.75rem;
  right: 0.75rem;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.56rem;
  letter-spacing: 0.13em;
  pointer-events: none;
}

.control-deck {
  z-index: 5;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1rem;
  min-height: 92px;
  padding: 0.75rem clamp(0.85rem, 3vw, 1.5rem);
  border-top: 1px solid var(--line);
  background: rgba(3, 8, 14, 0.94);
}
.mission-copy { min-width: 0; }
.mission-copy p { margin: 0; }
.mission-copy .eyebrow { color: var(--cyan); font-size: 0.56rem; letter-spacing: 0.16em; }
#objectiveText { margin-top: 0.35rem; color: var(--muted); font: clamp(0.7rem, 2.4vw, 0.82rem)/1.35 system-ui, sans-serif; }
.physics-note { margin-top: 0.45rem !important; color: var(--dim); font-size: 0.52rem; letter-spacing: 0.08em; }
.orbit-result { min-width: 0; overflow: hidden; }
.orbit-result[hidden] { display: none; }
.orbit-result .eyebrow { margin: 0; color: var(--cyan); font-size: 0.56rem; letter-spacing: 0.16em; }
.orbit-result h2 { margin: 0.35rem 0 0; font: 500 clamp(1.2rem, 4vw, 1.75rem)/1.05 Georgia, serif; }
.orbit-result > p:last-child { margin: 0.4rem 0 0; color: var(--muted); font: 0.76rem/1.4 system-ui, sans-serif; }
.button-row { display: flex; gap: 0.45rem; }

@media (min-width: 900px) and (min-height: 650px) {
  .game-stage { width: min(92vw, 1180px); height: min(92svh, 820px); grid-template-columns: minmax(0, 1fr) 270px; grid-template-rows: auto minmax(0, 1fr); border: 1px solid var(--line); }
  .hud { grid-column: 1 / -1; }
  .viewport-wrap { grid-column: 1; }
  .control-deck { grid-column: 2; grid-row: 2; align-content: space-between; grid-template-columns: 1fr; border-top: 0; border-left: 1px solid var(--line); padding: 1.5rem; }
  .button-row { align-self: end; display: grid; }
  .message-panel { width: min(calc(100% - 3rem), 470px); }
}

@media (max-width: 560px) {
  .hud { min-height: 58px; padding: 0.45rem 0.7rem; }
  .brand-lockup { gap: 0.5rem; }
  .brand-lockup > a { width: 34px; height: 34px; }
  .brand-lockup p { display: none; }
  .brand-lockup h1 { margin: 0; font-size: 0.78rem; }
  .mission-readout span { font-size: 0.5rem; }
  .mission-readout strong { font-size: 0.82rem; }
  .control-deck { grid-template-columns: 1fr; gap: 0.4rem; min-height: 92px; padding: 0.5rem 0.7rem 0.6rem; }
  .mission-copy .eyebrow { font-size: 0.49rem; }
  #objectiveText { margin-top: 0.2rem; font-size: 0.68rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .physics-note { display: none; }
  .orbit-result h2 { margin-top: 0.2rem; font-size: 1.05rem; }
  .orbit-result > p:last-child { margin-top: 0.2rem; font-size: 0.66rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .button-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .button-row button { padding-inline: 0.35rem; }
  .flight-status { top: 0.5rem; left: 0.55rem; right: 0.55rem; font-size: 0.48rem; }
  .game-stage.modal-open .control-deck,
  .game-stage.modal-open .flight-status { display: none; }
  .message-panel {
    width: calc(100% - 1.25rem);
    max-height: calc(100% - 1.25rem);
    padding: 0.9rem;
    overflow: auto;
  }
  .message-panel h2 { margin-top: 0.3rem; font-size: clamp(1.55rem, 8vw, 2rem); }
  .message-panel > p:not(.message-kicker) { margin-top: 0.55rem; font-size: 0.78rem; line-height: 1.42; }
  .message-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.45rem; margin-top: 0.75rem; }
  .message-actions button { min-width: 0; padding: 0.5rem 0.35rem; font-size: 0.55rem; }
}

@media (max-width: 380px), (max-height: 650px) {
  .control-deck { min-height: 76px; }
  .mission-copy, .orbit-result { display: none; }
  .button-row { align-self: center; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}