:root {
  color-scheme: dark;
  --bg: #06080e;
  --panel: rgba(13, 17, 28, 0.78);
  --panel-strong: rgba(13, 17, 28, 0.92);
  --line: rgba(216, 229, 255, 0.14);
  --line-strong: rgba(216, 229, 255, 0.28);
  --text: #f4f7ff;
  --muted: rgba(244, 247, 255, 0.68);
  --blue: #54c7ff;
  --green: #55e286;
  --yellow: #ffe35a;
  --red: #ff706d;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  font-family: "Avenir Next", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 0%, rgba(86, 199, 255, 0.18), transparent 28%),
    radial-gradient(circle at 18% 78%, rgba(255, 112, 109, 0.14), transparent 24%),
    linear-gradient(180deg, #111727 0%, #070a11 62%, #030407 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 92%);
}

.arena-app {
  width: min(100vw - 20px, 520px);
  margin: 0 auto;
  padding: 12px 0 20px;
  display: grid;
  gap: 12px;
}

.arena-hud {
  display: flex;
  align-items: stretch;
  gap: 10px;
}

.arena-hud-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.arena-hud-tile,
.arena-button,
.arena-panel,
.arena-footer-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.arena-hud-tile {
  min-height: 66px;
  border-radius: 6px;
  padding: 10px 11px;
  display: grid;
  gap: 4px;
}

.arena-hud-tile span,
.arena-footer-card span,
.arena-eyebrow {
  font-size: 0.68rem;
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.arena-hud-tile strong {
  font-size: 1.08rem;
  line-height: 1.1;
}

.arena-button {
  appearance: none;
  min-height: 42px;
  border-radius: 6px;
  padding: 0 15px;
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.arena-button:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.arena-button-primary {
  background: linear-gradient(180deg, rgba(84, 199, 255, 0.32), rgba(84, 199, 255, 0.12));
  border-color: rgba(84, 199, 255, 0.44);
}

.arena-button-ghost {
  background: rgba(255, 255, 255, 0.04);
}

.arena-stage {
  display: grid;
  gap: 12px;
}

.arena-phone {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid rgba(216, 229, 255, 0.14);
  background: linear-gradient(180deg, rgba(6, 9, 17, 0.96), rgba(3, 4, 8, 1));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.46);
}

.arena-health {
  position: absolute;
  z-index: 2;
  top: 12px;
  left: 12px;
  right: 12px;
  display: grid;
  gap: 5px;
  padding: 10px;
  border: 1px solid rgba(216, 229, 255, 0.1);
  border-radius: 6px;
  background: rgba(3, 5, 11, 0.7);
  backdrop-filter: blur(10px);
}

.arena-health-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  min-height: 18px;
}

.arena-health-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  color: rgba(244, 247, 255, 0.8);
}

.arena-health-row i {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--blue);
  box-shadow: 0 0 12px currentColor;
}

.arena-health-row[data-team="green"] i {
  background: var(--green);
}

.arena-health-row[data-team="yellow"] i {
  background: var(--yellow);
}

.arena-health-row[data-team="red"] i {
  background: var(--red);
}

.arena-pips {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 4px;
}

.arena-pips i {
  display: block;
  height: 8px;
  border-radius: 999px;
  border: 1px solid rgba(244, 247, 255, 0.2);
  background: rgba(244, 247, 255, 0.04);
}

.arena-pips i.is-full {
  border-color: transparent;
  background: currentColor;
  box-shadow: 0 0 10px currentColor;
}

#hpBlue {
  color: var(--blue);
}

#hpGreen {
  color: var(--green);
}

#hpYellow {
  color: var(--yellow);
}

#hpRed {
  color: var(--red);
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 43 / 76;
  touch-action: none;
}

.arena-overlay {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  background: linear-gradient(180deg, rgba(5, 8, 14, 0.34), rgba(3, 4, 8, 0.82));
}

.arena-panel {
  width: min(100%, 374px);
  border-radius: 8px;
  padding: 24px 22px;
  display: grid;
  gap: 16px;
  background: var(--panel-strong);
}

.arena-panel h1,
.arena-panel h2,
.arena-panel p {
  margin: 0;
}

.arena-panel h1 {
  font-size: clamp(2rem, 7vw, 2.9rem);
  line-height: 1;
}

.arena-panel h2 {
  font-size: clamp(1.8rem, 6vw, 2.4rem);
  line-height: 1.08;
}

.arena-lead {
  color: rgba(244, 247, 255, 0.86);
  line-height: 1.75;
}

.arena-pick-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.arena-pick {
  appearance: none;
  border: 1px solid rgba(216, 229, 255, 0.14);
  border-radius: 6px;
  min-height: 48px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.arena-pick[data-pick="blue"].is-active {
  background: rgba(84, 199, 255, 0.2);
  border-color: rgba(84, 199, 255, 0.64);
}

.arena-pick[data-pick="green"].is-active {
  background: rgba(85, 226, 134, 0.18);
  border-color: rgba(85, 226, 134, 0.58);
}

.arena-pick[data-pick="yellow"].is-active {
  background: rgba(255, 227, 90, 0.18);
  border-color: rgba(255, 227, 90, 0.58);
}

.arena-pick[data-pick="red"].is-active {
  background: rgba(255, 112, 109, 0.18);
  border-color: rgba(255, 112, 109, 0.58);
}

.arena-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.arena-controls,
.arena-result-grid,
.arena-footer-card {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.arena-controls div,
.arena-result-grid div,
.arena-footer-card div {
  border: 1px solid rgba(216, 229, 255, 0.1);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  padding: 10px;
  display: grid;
  gap: 4px;
}

.arena-controls strong,
.arena-result-grid strong,
.arena-footer-card strong {
  font-size: 1rem;
}

.arena-controls span,
.arena-result-grid span {
  color: var(--muted);
  font-size: 0.78rem;
}

.arena-footer-card {
  border-radius: 6px;
  padding: 10px;
}

@media (max-width: 520px) {
  .arena-app {
    width: min(100vw - 12px, 520px);
    padding-top: 8px;
  }

  .arena-hud {
    display: grid;
  }

  .arena-hud-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .arena-health {
    top: 8px;
    left: 8px;
    right: 8px;
    padding: 8px;
  }

  .arena-pips {
    gap: 3px;
  }

  .arena-panel {
    padding: 20px 18px;
  }
}