:root {
  --bg: #f3efe3;
  --panel: rgba(255, 255, 255, 0.85);
  --ink: #211d18;
  --accent: #b8712f;
  --accent-dark: #8f5723;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 10%, #fff8e9 0%, rgba(255, 248, 233, 0) 45%),
    radial-gradient(circle at 90% 92%, #e9dcc3 0%, rgba(233, 220, 195, 0) 50%),
    linear-gradient(140deg, #e7ddc7 0%, #d9ccb2 100%);
  font-family: "Avenir Next", "Trebuchet MS", sans-serif;
}

.game-shell {
  width: min(96vw, 1120px);
}

.hud {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.hud-item {
  background: var(--panel);
  border: 1px solid #c6b597;
  border-radius: 10px;
  padding: 8px 12px;
  min-width: 108px;
}

.label {
  display: block;
  font-size: 0.72rem;
  opacity: 0.75;
}

.value {
  font-weight: 700;
  font-size: 1.1rem;
}

.action-btn {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  color: #fff;
  background: var(--accent);
  box-shadow: 0 3px 0 var(--accent-dark);
  font-weight: 700;
}

.action-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.action-btn.subtle {
  background: #6a6a6a;
  box-shadow: 0 3px 0 #4f4f4f;
}

.action-btn.skill {
  background: #3a6da7;
  box-shadow: 0 3px 0 #234970;
}

.action-btn.info {
  background: #4d7897;
  box-shadow: 0 3px 0 #355067;
}

.action-btn.formation {
  --formation-bg: #8e7f69;
  --formation-shadow: #625744;
  background: var(--formation-bg);
  box-shadow: 0 3px 0 var(--formation-shadow);
  font-size: 0.9rem;
  padding: 9px 12px;
}

.action-btn.formation.assault {
  --formation-bg: #c87840;
  --formation-shadow: #8a4d27;
}

.action-btn.formation.guard {
  --formation-bg: #5c7da6;
  --formation-shadow: #3f5572;
}

.action-btn.formation.rush {
  --formation-bg: #479969;
  --formation-shadow: #2f6d4a;
}

.action-btn.formation.is-active {
  box-shadow:
    0 0 0 2px rgba(255, 246, 222, 0.95),
    0 3px 0 var(--formation-shadow);
}

.action-btn.small {
  padding: 7px 10px;
  font-size: 0.86rem;
}

.hud-item.skill-info .value {
  font-size: 0.95rem;
}

.hud-item.formation-info .value {
  font-size: 0.95rem;
}

.arena-wrap {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 2px solid #9d8664;
  background: #a4c889;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
}

.overlay,
.message {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(28, 22, 15, 0.58);
}

.panel {
  width: min(94%, 760px);
  background: #f6f2e8;
  border: 2px solid #ba9b72;
  border-radius: 16px;
  padding: 26px;
}

.panel h1 {
  margin: 0 0 8px;
}

.panel p {
  margin: 0 0 18px;
  opacity: 0.84;
}

.race-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.race-btn {
  border: 2px solid #baa584;
  border-radius: 12px;
  padding: 14px 12px;
  font: inherit;
  font-weight: 700;
  color: var(--ink);
  background: #fff5e4;
  cursor: pointer;
}

.race-btn small {
  display: block;
  margin-top: 4px;
  font-weight: 500;
  opacity: 0.85;
}

.race-btn:hover {
  transform: translateY(-1px);
  border-color: #8c6f4b;
}

.message {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #fff8ee;
  text-align: center;
}

.mechanics-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(21, 15, 11, 0.72);
}

.mechanics-card {
  width: min(96vw, 820px);
  max-height: 84vh;
  overflow: auto;
  border-radius: 16px;
  border: 2px solid #ba9b72;
  background: #f6f2e8;
  padding: 20px;
}

.mechanics-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.mechanics-head h2 {
  margin: 0;
}

.mechanics-intro {
  margin: 8px 0 14px;
  opacity: 0.8;
}

.mechanic-detail {
  border: 1px solid #cebda0;
  border-radius: 10px;
  background: #fffaf0;
  padding: 10px 12px;
  margin-top: 10px;
}

.mechanic-detail > summary {
  cursor: pointer;
  font-weight: 700;
}

.mechanic-detail > p {
  margin: 10px 0 10px;
}

.mechanic-detail ul {
  margin: 10px 0 0;
  padding-left: 18px;
}

.mechanic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.mechanic-card {
  border: 1px solid #d7c8ad;
  border-radius: 10px;
  background: #fff;
  padding: 10px;
}

.mechanic-card h3 {
  margin: 0 0 6px;
}

.mechanic-card p {
  margin: 0 0 8px;
  font-size: 0.93rem;
  opacity: 0.85;
}

.mechanic-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 0.9rem;
}

.mechanic-card.assault h3 {
  color: #9a4f25;
}

.mechanic-card.guard h3 {
  color: #3f5f88;
}

.mechanic-card.rush h3 {
  color: #2d7650;
}

.hidden {
  display: none;
}

@media (max-width: 780px) {
  .race-grid {
    grid-template-columns: 1fr;
  }

  .hud {
    gap: 8px;
  }

  .hud-item {
    min-width: 96px;
  }

  .action-btn {
    padding: 8px 10px;
  }

  .mechanic-grid {
    grid-template-columns: 1fr;
  }
}