:root {
  --night: #151936;
  --deep-night: #0e1127;
  --sun: #ffd36a;
  --sun-deep: #d8943d;
  --shadow: #303660;
  --safe: #8fd8cf;
  --danger: #e36e55;
  --paper: #f7edd7;
  font-family: "Yu Gothic UI", "Hiragino Sans", Meiryo, system-ui, sans-serif;
  color: var(--paper);
  background: var(--deep-night);
}

* { box-sizing: border-box; }
html { min-width: 320px; min-height: 100%; background: var(--deep-night); }
body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 76% 8%, rgba(255, 211, 106, 0.12), transparent 26rem),
    radial-gradient(circle at 12% 30%, rgba(98, 111, 173, 0.16), transparent 30rem),
    linear-gradient(180deg, #171b3a 0%, #0e1127 76%);
}

button, a, canvas { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
[hidden] { display: none !important; }

.page-shell {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding-bottom: 38px;
}

.topbar {
  min-height: 66px;
  border-bottom: 1px solid rgba(247, 237, 215, 0.14);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: rgba(247, 237, 215, 0.58);
  font: 750 0.63rem/1 ui-monospace, Consolas, monospace;
  letter-spacing: 0.14em;
}

.topbar p { margin: 0; }
.back-link {
  min-height: 44px;
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.back-link:hover, .back-link:focus-visible { color: var(--sun); }

.game-shell { padding-top: clamp(28px, 5vw, 54px); }
.game-heading {
  margin-bottom: 22px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
}

.eyebrow {
  margin: 0 0 8px;
  color: rgba(255, 211, 106, 0.74);
  font: 750 0.59rem/1.4 ui-monospace, Consolas, monospace;
  letter-spacing: 0.17em;
}

h1 {
  margin: 0;
  font-size: clamp(3.5rem, 8vw, 6.8rem);
  line-height: 0.9;
  letter-spacing: -0.09em;
  font-weight: 850;
}

.game-subtitle {
  margin: 14px 0 0;
  color: rgba(247, 237, 215, 0.58);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.meters {
  width: min(490px, 52vw);
  display: grid;
  grid-template-columns: 0.74fr 1.45fr 1fr;
  gap: 8px;
}

.stat-card {
  min-width: 0;
  min-height: 76px;
  padding: 13px 14px;
  border: 1px solid rgba(247, 237, 215, 0.14);
  background: rgba(14, 17, 39, 0.66);
  display: grid;
  align-content: space-between;
  gap: 7px;
}

.stat-card > span:first-child {
  color: rgba(247, 237, 215, 0.46);
  font: 700 0.56rem/1 ui-monospace, Consolas, monospace;
  letter-spacing: 0.13em;
}
.stat-card strong {
  white-space: nowrap;
  font: 800 0.92rem/1 ui-monospace, Consolas, monospace;
}
.progress-card strong { color: var(--sun); }
.meter-track { height: 3px; overflow: hidden; background: rgba(247, 237, 215, 0.1); }
.meter-track i {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--safe), var(--sun));
}
.safety-card { transition: border-color 0.12s ease, background 0.12s ease; }
.safety-card[data-state="safe"] {
  border-color: rgba(143, 216, 207, 0.46);
  background: rgba(143, 216, 207, 0.08);
}
.safety-card[data-state="safe"] strong { color: var(--safe); }
.safety-card[data-state="danger"] {
  border-color: rgba(227, 110, 85, 0.58);
  background: rgba(227, 110, 85, 0.1);
}
.safety-card[data-state="danger"] strong { color: var(--danger); }
.safety-card[data-state="complete"] strong { color: var(--sun); }
.exposure-track i {
  background: linear-gradient(90deg, var(--sun), var(--danger));
  transition: width 0.08s linear;
}
.safety-card[data-state="danger"] .exposure-track i { background: var(--danger); }

.game-board {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(247, 237, 215, 0.18);
  background: #d9a85d;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.38);
  isolation: isolate;
}
.game-board::after {
  content: "";
  position: absolute;
  inset: 12px;
  z-index: 2;
  border: 1px solid rgba(247, 237, 215, 0.18);
  pointer-events: none;
}

#game-canvas {
  width: 100%;
  aspect-ratio: 10 / 7;
  display: block;
  touch-action: none;
  cursor: crosshair;
  outline: none;
}
#game-canvas.is-dragging { cursor: grabbing; }
#game-canvas:focus-visible { box-shadow: inset 0 0 0 3px rgba(255, 211, 106, 0.82); }

.overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  padding: 22px;
  background: rgba(10, 13, 31, 0.58);
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
}
.result-overlay { cursor: pointer; }
.overlay-card {
  width: min(500px, 100%);
  padding: clamp(25px, 5vw, 44px);
  border: 1px solid rgba(247, 237, 215, 0.25);
  background:
    linear-gradient(135deg, rgba(255, 211, 106, 0.08), transparent 48%),
    rgba(19, 23, 51, 0.95);
  box-shadow: 0 24px 74px rgba(0, 0, 0, 0.45);
  text-align: center;
}
.overlay-kicker {
  margin: 0 0 13px;
  color: var(--sun);
  font: 750 0.57rem/1.4 ui-monospace, Consolas, monospace;
  letter-spacing: 0.18em;
}
.overlay-card h2 {
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.14;
  letter-spacing: -0.055em;
}
.overlay-card > p:not(.overlay-kicker):not(.result-progress) {
  margin: 17px 0 0;
  color: rgba(247, 237, 215, 0.68);
  font-size: 0.84rem;
  line-height: 1.75;
}

.how-to-steps {
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
  list-style: none;
  text-align: left;
}
.how-to-steps li {
  min-height: 44px;
  padding: 7px 10px;
  border: 1px solid rgba(247, 237, 215, 0.12);
  background: rgba(247, 237, 215, 0.035);
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: 9px;
  color: rgba(247, 237, 215, 0.56);
  font-size: 0.66rem;
  line-height: 1.35;
}
.how-to-steps b {
  width: 26px;
  height: 26px;
  border: 1px solid rgba(255, 211, 106, 0.48);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--sun);
  font: 800 0.68rem/1 ui-monospace, Consolas, monospace;
}
.how-to-steps span, .how-to-steps strong { display: block; }
.how-to-steps strong {
  margin-bottom: 1px;
  color: rgba(247, 237, 215, 0.92);
  font-size: 0.78rem;
}

.primary-button {
  min-width: 205px;
  min-height: 50px;
  margin-top: 24px;
  padding: 0 24px;
  border: 0;
  background: var(--sun);
  color: #18182d;
  font-weight: 850;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}
.primary-button:hover, .primary-button:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0 rgba(143, 216, 207, 0.64);
  outline: none;
}
.overlay-card small {
  display: block;
  margin-top: 13px;
  color: rgba(247, 237, 215, 0.42);
  font: 650 0.55rem/1.4 ui-monospace, Consolas, monospace;
  letter-spacing: 0.07em;
}
.result-card { border-color: rgba(255, 211, 106, 0.34); }
.result-progress {
  margin: 0 0 9px;
  color: var(--sun);
  font: 850 clamp(2.6rem, 8vw, 5.1rem)/1 ui-monospace, Consolas, monospace;
  letter-spacing: -0.08em;
}

.game-footer {
  min-height: 72px;
  padding: 17px 4px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}
.game-status, .control-hint {
  margin: 0;
  color: rgba(247, 237, 215, 0.56);
  font-size: 0.73rem;
  line-height: 1.7;
}
.game-status {
  max-width: 570px;
  color: rgba(247, 237, 215, 0.82);
  font-weight: 650;
}
.control-hint { text-align: right; font-family: ui-monospace, Consolas, monospace; }
.control-hint span { color: var(--sun); }

@media (max-width: 860px) {
  .game-heading { align-items: stretch; flex-direction: column; gap: 20px; }
  .meters { width: 100%; }
}

@media (max-width: 620px) {
  .page-shell { width: min(100% - 24px, 1080px); padding-bottom: 24px; }
  .topbar { min-height: 56px; }
  .game-shell { padding-top: 24px; }
  h1 { font-size: clamp(3.8rem, 18vw, 5.5rem); }
  .stat-card { min-height: 62px; padding: 10px 11px; }
  .game-board::after { inset: 7px; }
  .overlay { padding: 8px; }
  .overlay-card { padding: 17px 16px; }
  .game-footer { flex-direction: column; gap: 7px; }
  .control-hint { text-align: left; }
}

@media (max-width: 430px) {
  .topbar p { font-size: 0.54rem; }
  .game-subtitle { margin-top: 9px; }
  .meters { gap: 5px; }
  .stat-card { min-height: 57px; padding: 8px 9px; }
  .stat-card strong { font-size: 0.76rem; }
  .overlay { padding: 4px; }
  .overlay-card { padding: 7px 10px; }
  .overlay-kicker { margin-bottom: 3px; font-size: 0.42rem; }
  .overlay-card h2 { font-size: 1.14rem; line-height: 1.05; }
  .overlay-card > p:not(.overlay-kicker):not(.result-progress) {
    margin-top: 4px;
    font-size: 0.6rem;
    line-height: 1.3;
  }
  .how-to-steps { margin-top: 5px; gap: 2px; }
  .how-to-steps li {
    min-height: 25px;
    padding: 2px 5px;
    grid-template-columns: 19px 1fr;
    gap: 5px;
    font-size: 0.48rem;
    line-height: 1.1;
  }
  .how-to-steps b { width: 18px; height: 18px; font-size: 0.52rem; }
  .how-to-steps strong { font-size: 0.56rem; }
  .primary-button { min-width: 180px; min-height: 44px; margin-top: 6px; }
  .overlay-card small { margin-top: 3px; font-size: 0.42rem; }
  .result-progress { margin-bottom: 4px; font-size: 2.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; }
}