:root {
  color-scheme: dark;
  --bg: #111116;
  --bg-2: #18181f;
  --panel: rgba(245, 244, 235, 0.08);
  --panel-strong: rgba(245, 244, 235, 0.15);
  --ink: #f5f4eb;
  --muted: #a6a391;
  --line: rgba(245, 244, 235, 0.18);
  --cyan: #42d7ff;
  --coral: #ff4e63;
  --gold: #f2c14e;
  --green: #57e389;
  --violet: #9e7bff;
  --shadow: rgba(0, 0, 0, 0.5);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 78, 99, 0.16), transparent 28%),
    radial-gradient(circle at 86% 18%, rgba(66, 215, 255, 0.14), transparent 24%),
    linear-gradient(135deg, #111116 0%, #16151b 52%, #101014 100%);
  background-size: 140% 140%;
  color: var(--ink);
  font-family: "Avenir Next Condensed", "DIN Condensed", "PingFang SC", sans-serif;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  animation: pageGlow 18s ease-in-out infinite alternate;
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, transparent, #000 18%, #000 78%, transparent);
}

button {
  color: inherit;
  font: inherit;
}

.app-shell {
  position: relative;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  gap: 10px;
  width: min(100vw, 520px);
  height: 100dvh;
  margin: 0 auto;
  padding:
    max(10px, env(safe-area-inset-top))
    12px
    max(10px, env(safe-area-inset-bottom));
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: 8px;
  min-height: 0;
}

.brand {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 10px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border: 2px solid var(--ink);
  background:
    linear-gradient(90deg, transparent 45%, var(--ink) 45% 55%, transparent 55%),
    linear-gradient(var(--cyan), var(--cyan)) 5px 5px / 9px 9px no-repeat,
    linear-gradient(var(--coral), var(--coral)) 18px 18px / 9px 9px no-repeat,
    var(--bg);
  box-shadow: 5px 5px 0 var(--coral);
}

h1,
p {
  margin: 0;
}

h1 {
  font-size: clamp(24px, 7vw, 34px);
  line-height: 0.9;
  letter-spacing: 0;
}

.brand p {
  margin-top: 4px;
  color: var(--muted);
  font-family: "PingFang SC", sans-serif;
  font-size: 12px;
}

.mode-switch {
  display: flex;
  gap: 6px;
  width: 100%;
  max-width: 100%;
  padding-bottom: 3px;
  overflow-x: auto;
  scrollbar-width: none;
}

.mode-switch::-webkit-scrollbar {
  display: none;
}

.mode-button,
.icon-button,
.control-button,
.primary-button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 8px 24px var(--shadow);
  transition:
    transform 140ms ease,
    border-color 180ms ease,
    background 220ms ease,
    color 180ms ease,
    box-shadow 220ms ease;
}

.mode-button {
  flex: 0 0 auto;
  min-height: 32px;
  padding: 0 10px;
  font-size: 13px;
  white-space: nowrap;
}

.mode-button.is-active {
  border-color: rgba(66, 215, 255, 0.7);
  background:
    linear-gradient(135deg, rgba(66, 215, 255, 0.22), rgba(158, 123, 255, 0.08)),
    rgba(66, 215, 255, 0.14);
  color: var(--cyan);
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, 1fr) auto;
  align-items: stretch;
  gap: 8px;
}

.hud-item {
  min-width: 0;
  padding: 8px 9px 7px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.18);
}

.hud-item span {
  display: block;
  color: var(--muted);
  font-family: "PingFang SC", sans-serif;
  font-size: 11px;
  line-height: 1.1;
}

.hud-item strong {
  display: block;
  margin-top: 2px;
  overflow: hidden;
  font-family: "DIN Alternate", "Avenir Next Condensed", monospace;
  font-size: clamp(18px, 6vw, 28px);
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hud-actions {
  display: grid;
  grid-template-columns: repeat(2, 42px);
  gap: 8px;
}

.icon-button {
  width: 42px;
  min-height: 48px;
  font-size: 21px;
}

.stage-wrap {
  position: relative;
  display: grid;
  min-height: 0;
  place-items: center;
}

#gameCanvas {
  width: min(100%, 420px);
  height: min(100%, calc((100vw - 24px) * 1.5), 620px);
  max-height: 100%;
  aspect-ratio: 2 / 3;
  border: 1px solid rgba(245, 244, 235, 0.24);
  border-radius: var(--radius);
  background: #09090d;
  box-shadow:
    0 20px 45px rgba(0, 0, 0, 0.42),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  touch-action: none;
  transition:
    border-color 220ms ease,
    box-shadow 260ms ease,
    filter 260ms ease;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  border-radius: var(--radius);
  background: rgba(12, 12, 16, 0.64);
  backdrop-filter: blur(8px);
}

.overlay.is-hidden {
  display: none;
}

.overlay-panel {
  width: min(280px, 100%);
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17, 17, 22, 0.92);
  text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  animation: panelEnter 180ms ease-out both;
}

.overlay-panel h2 {
  margin: 0;
  color: var(--gold);
  font-size: 30px;
  line-height: 1;
}

.overlay-panel p {
  margin: 10px 0 16px;
  color: var(--muted);
  font-family: "PingFang SC", sans-serif;
  font-size: 14px;
}

.primary-button {
  min-width: 120px;
  min-height: 42px;
  padding: 0 18px;
  border-color: rgba(87, 227, 137, 0.7);
  background: rgba(87, 227, 137, 0.13);
  color: var(--green);
}

.controls {
  display: grid;
  grid-template-columns: 0.9fr 1.25fr;
  gap: 10px;
}

.control-cluster {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 8px;
}

.control-button {
  min-height: 58px;
  padding: 0;
  font-family: "DIN Alternate", "Avenir Next Condensed", sans-serif;
  font-size: 27px;
  line-height: 1;
}

.control-button-wide {
  color: var(--gold);
}

.control-button:active,
.control-button.is-pressed,
.icon-button:active,
.primary-button:active {
  transform: translateY(1px);
  border-color: rgba(245, 244, 235, 0.36);
  background:
    linear-gradient(135deg, rgba(245, 244, 235, 0.18), rgba(66, 215, 255, 0.08)),
    var(--panel-strong);
}

@keyframes pageGlow {
  from {
    background-position: 0% 0%;
  }

  to {
    background-position: 100% 52%;
  }
}

@keyframes panelEnter {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (orientation: landscape) and (max-height: 520px) {
  .app-shell {
    grid-template-columns: 220px minmax(280px, 1fr) 190px;
    grid-template-rows: auto 1fr;
    gap: 10px;
    width: 100vw;
  }

  .topbar,
  .hud,
  .controls {
    align-self: stretch;
  }

  .topbar {
    grid-column: 1;
    grid-row: 1 / span 2;
    grid-template-rows: auto minmax(0, 1fr);
    align-items: stretch;
  }

  .mode-switch {
    flex-direction: column;
    width: 100%;
    overflow-x: hidden;
    overflow-y: auto;
  }

  .hud {
    grid-column: 3;
    grid-row: 1;
    grid-template-columns: 1fr;
  }

  .hud-actions {
    grid-template-columns: repeat(2, 1fr);
  }

  .icon-button {
    width: auto;
  }

  .stage-wrap {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .controls {
    grid-column: 3;
    grid-row: 2;
    grid-template-columns: 1fr;
    align-content: end;
  }
}