:root {
  --bg-paper: #f6f1e4;
  --bg-mint: #d9efe1;
  --ink: #171a1f;
  --muted: rgba(23, 26, 31, 0.7);
  --panel: rgba(255, 251, 242, 0.94);
  --line: rgba(23, 26, 31, 0.12);
  --shadow: rgba(11, 17, 24, 0.18);
  --accent: #e1692a;
  --accent-2: #198b78;
  --accent-3: #2c66cc;
  --danger: #be3f47;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(800px 420px at 8% -4%, rgba(255, 255, 255, 0.9), transparent 60%),
    radial-gradient(520px 320px at 92% 8%, rgba(225, 105, 42, 0.14), transparent 70%),
    radial-gradient(680px 420px at 55% 100%, rgba(25, 139, 120, 0.1), transparent 65%),
    linear-gradient(165deg, var(--bg-paper), var(--bg-mint));
  touch-action: manipulation;
}

.app {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 14px;
  display: grid;
  gap: 12px;
}

.hud {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: start;
}

.brand h1 {
  margin: 0;
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.03em;
  font-size: clamp(1.25rem, 3vw, 2rem);
}

.brand p {
  margin: 6px 0 0;
  color: var(--muted);
  max-width: 62ch;
  line-height: 1.3;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(96px, 1fr));
  gap: 8px;
}

.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 10px;
  box-shadow: 0 14px 26px -22px var(--shadow);
}

.stat .label {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(23, 26, 31, 0.6);
}

.stat strong {
  display: block;
  font-size: 1.08rem;
  margin-top: 1px;
}

.toolbar {
  display: grid;
  grid-template-columns: auto auto auto 1fr;
  gap: 8px;
  align-items: center;
}

.tool-btn {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  padding: 9px 12px;
  cursor: pointer;
  box-shadow: 0 10px 18px -16px var(--shadow);
}

.tool-btn[aria-pressed="true"] {
  background: rgba(25, 139, 120, 0.12);
  border-color: rgba(25, 139, 120, 0.28);
}

.toolbar-note {
  min-height: 1lh;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: right;
}

.game-shell {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 24px 42px -28px var(--shadow);
  background: rgba(255, 255, 255, 0.4);
}

#gameCanvas {
  display: block;
  width: 100%;
  height: min(72vh, 800px);
  min-height: 460px;
  touch-action: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 14px;
  background: rgba(8, 12, 18, 0.3);
  backdrop-filter: blur(3px);
}

.overlay.hidden {
  display: none;
}

.panel {
  width: min(620px, 100%);
  max-height: calc(100% - 8px);
  overflow: auto;
  background: var(--panel);
  border: 1px solid rgba(23, 26, 31, 0.1);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 30px 45px -26px rgba(0, 0, 0, 0.4);
  display: grid;
  gap: 14px;
}

.panel-head h2 {
  margin: 0;
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  line-height: 1.05;
}

.panel-head p {
  margin: 7px 0 0;
  color: var(--muted);
  line-height: 1.35;
}

.session-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.session-summary div {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.7);
}

.session-summary span {
  display: block;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(23, 26, 31, 0.55);
}

.session-summary strong {
  display: block;
  margin-top: 2px;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.field,
.toggle {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 12px;
  padding: 10px 11px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.85rem;
  color: var(--muted);
}

.field select {
  width: 100%;
  border: 1px solid rgba(23, 26, 31, 0.14);
  border-radius: 10px;
  background: #fff;
  padding: 9px 10px;
  font: inherit;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toggle input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-2);
  margin: 0;
}

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

.btn {
  border: 0;
  border-radius: 12px;
  background: linear-gradient(180deg, #f29352, var(--accent));
  color: #fff;
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.01em;
  padding: 11px 14px;
  min-width: 154px;
  cursor: pointer;
}

.btn.ghost {
  background: rgba(23, 26, 31, 0.08);
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn:active,
.tool-btn:active,
.ctrl:active,
.link-btn:active {
  transform: translateY(1px);
}

.leaderboard {
  border-top: 1px solid rgba(23, 26, 31, 0.08);
  padding-top: 8px;
  display: grid;
  gap: 8px;
}

.leaderboard-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

.leaderboard-head h3 {
  margin: 0;
  font-size: 0.96rem;
}

.link-btn {
  border: 0;
  background: transparent;
  color: var(--accent-3);
  font: inherit;
  font-weight: 700;
  padding: 4px 2px;
  cursor: pointer;
}

#leaderboardList {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
}

#leaderboardList li {
  color: var(--muted);
  line-height: 1.25;
}

#leaderboardList li strong {
  color: var(--ink);
}

.controls {
  display: grid;
  justify-items: center;
  gap: 8px;
}

.dpad {
  display: grid;
  grid-template-columns: repeat(3, minmax(58px, 82px));
  grid-template-rows: repeat(2, minmax(50px, 66px));
  gap: 8px;
  grid-template-areas:
    ". up ."
    "left down right";
}

.ctrl {
  border: 1px solid rgba(23, 26, 31, 0.14);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(249, 247, 240, 0.95));
  border-radius: 12px;
  color: var(--ink);
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.04em;
  box-shadow: 0 12px 20px -18px var(--shadow);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.ctrl.up { grid-area: up; }
.ctrl.left { grid-area: left; }
.ctrl.down { grid-area: down; }
.ctrl.right { grid-area: right; }

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.legend {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.legend-card {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  padding: 12px;
  box-shadow: 0 12px 22px -22px var(--shadow);
}

.legend-card h3 {
  margin: 0;
  font-size: 0.95rem;
}

.legend-card p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.25;
}

.legend-card.hw { border-color: rgba(195, 158, 63, 0.35); }
.legend-card.tr { border-color: rgba(191, 77, 77, 0.35); }
.legend-card.ch { border-color: rgba(78, 120, 191, 0.35); }

@media (max-width: 960px) {
  .hud {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }

  .toolbar {
    grid-template-columns: repeat(3, auto);
  }

  .toolbar-note {
    grid-column: 1 / -1;
    text-align: left;
  }

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

@media (max-width: 720px) {
  .app {
    padding: 10px;
    gap: 10px;
  }

  #gameCanvas {
    height: min(62vh, 580px);
    min-height: 400px;
  }

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

  .session-summary {
    grid-template-columns: 1fr;
  }

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

  .panel {
    padding: 14px;
  }

  .dpad {
    grid-template-columns: repeat(3, minmax(62px, 80px));
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto;
  }

  .btn,
  .tool-btn,
  .ctrl,
  .link-btn {
    transition: none;
  }
}