:root {
  --bg: #eef2f7;
  --paper: #121820;
  --ink: #f4f7fb;
  --cyan: #0682a8;
  --mag: #d81b60;
  --dim: rgba(18, 24, 32, 0.55);
  --wall: #161b22;
  --hud-bg: rgba(255, 255, 255, 0.62);
  --btn-border: rgba(6, 130, 168, 0.45);
  --panel-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(236, 242, 248, 0.96));
  --overlay: rgba(238, 242, 247, 0.7);
  --scan: rgba(18, 24, 32, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #05070c;
    --paper: #f4f7fb;
    --ink: #0b0f16;
    --cyan: #5cf0ff;
    --mag: #ff3d8a;
    --dim: rgba(244, 247, 251, 0.55);
    --wall: #f4f7fb;
    --hud-bg: rgba(5, 7, 12, 0.45);
    --btn-border: rgba(244, 247, 251, 0.18);
    --panel-bg: linear-gradient(180deg, rgba(12, 18, 28, 0.96), rgba(5, 7, 12, 0.96));
    --overlay: rgba(5, 7, 12, 0.62);
    --scan: rgba(0, 0, 0, 0.08);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html,
body,
#app {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--paper);
  font-family: "Share Tech Mono", "DIN Alternate", "PingFang SC", "Noto Sans SC", sans-serif;
}

body {
  overscroll-behavior: none;
  touch-action: none;
}

#maze {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

#scanlines {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 2px,
      var(--scan) 3px
    );
  opacity: 0.45;
}

.haptic-lamp {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  right: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--paper) 25%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--cyan) 35%, transparent);
  z-index: 6;
  pointer-events: none;
}

.haptic-lamp.pulse {
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}

.hud-screen {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.hud-screen.active {
  display: flex;
}

#screen-menu {
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(80% 50% at 50% 0%, color-mix(in srgb, var(--cyan) 18%, transparent), transparent 55%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg) 55%, transparent), color-mix(in srgb, var(--bg) 88%, transparent));
  pointer-events: auto;
}

.menu-core {
  width: min(86vw, 380px);
  text-align: center;
}

.menu-kicker {
  letter-spacing: 0.42em;
  font-size: 11px;
  color: var(--cyan);
}

.menu-core h1 {
  margin: 8px 0 10px;
  font-size: clamp(36px, 10vw, 52px);
  letter-spacing: 0.18em;
  font-weight: 700;
  text-shadow: 0 0 18px color-mix(in srgb, var(--cyan) 45%, transparent);
}

.menu-lead {
  color: var(--dim);
  margin-bottom: 22px;
  letter-spacing: 0.08em;
}

.menu-hint {
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--dim);
}

.cyber-btn {
  display: block;
  width: 100%;
  margin: 10px 0 0;
  padding: 13px 18px;
  border: 1px solid color-mix(in srgb, var(--cyan) 70%, transparent);
  background: linear-gradient(180deg, color-mix(in srgb, var(--cyan) 18%, transparent), color-mix(in srgb, var(--cyan) 5%, transparent));
  color: var(--paper);
  font: inherit;
  letter-spacing: 0.28em;
  cursor: pointer;
  box-shadow: 0 0 16px color-mix(in srgb, var(--cyan) 12%, transparent);
}

.cyber-btn:active {
  transform: translateY(1px);
  background: color-mix(in srgb, var(--cyan) 22%, transparent);
}

.cyber-btn.ghost {
  border-color: color-mix(in srgb, var(--paper) 22%, transparent);
  background: transparent;
  box-shadow: none;
  letter-spacing: 0.22em;
}

#screen-game {
  flex-direction: column;
  justify-content: flex-start;
}

.hud-top {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: max(10px, env(safe-area-inset-top)) 14px 8px;
}

.gear-btn {
  pointer-events: auto;
  padding: 8px 12px;
  border: 1px solid color-mix(in srgb, var(--cyan) 35%, transparent);
  background: var(--hud-bg);
  color: var(--paper);
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.18em;
  cursor: pointer;
  backdrop-filter: blur(6px);
}

.gear-btn:active {
  border-color: var(--cyan);
  color: var(--cyan);
}

.hud-chip {
  display: flex;
  flex-direction: column;
  padding: 6px 10px;
  border: 1px solid color-mix(in srgb, var(--cyan) 35%, transparent);
  background: var(--hud-bg);
  backdrop-filter: blur(6px);
}

.hud-chip span {
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.hud-chip strong {
  font-size: 14px;
  letter-spacing: 0.16em;
}

.bubble-level {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--cyan) 18%, var(--bg)), var(--bg) 72%);
  border: 1px solid color-mix(in srgb, var(--cyan) 45%, transparent);
}

#bubble {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.hud-btn {
  flex: 1;
  padding: 10px 0;
  border: 1px solid var(--btn-border);
  background: var(--hud-bg);
  color: var(--paper);
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.18em;
  cursor: pointer;
  backdrop-filter: blur(6px);
}

.hud-btn:active {
  border-color: var(--cyan);
  color: var(--cyan);
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--overlay);
  backdrop-filter: blur(8px);
}

.overlay[hidden] {
  display: none;
}

.panel {
  width: min(86vw, 340px);
  padding: 22px 18px 16px;
  border: 1px solid color-mix(in srgb, var(--cyan) 40%, transparent);
  background: var(--panel-bg);
  box-shadow: 0 0 28px color-mix(in srgb, var(--cyan) 12%, transparent);
}

.panel h2 {
  text-align: center;
  letter-spacing: 0.32em;
  color: var(--cyan);
  margin-bottom: 16px;
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.switch-row strong {
  display: block;
  font-size: 15px;
}

.switch-row small {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--dim);
}

.rocker {
  width: 58px;
  height: 28px;
  border: 1px solid color-mix(in srgb, var(--cyan) 40%, transparent);
  background: color-mix(in srgb, var(--paper) 8%, var(--bg));
  position: relative;
  cursor: pointer;
  flex-shrink: 0;
}

.rocker-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  background: #6b7688;
  transition: transform 0.16s ease, background 0.16s ease;
}

.rocker.on .rocker-knob {
  transform: translateX(30px);
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.panel .cyber-btn {
  width: 100%;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel p {
  text-align: center;
  margin-bottom: 16px;
  color: var(--dim);
  font-size: 14px;
}