:root {
  --bg-start: #eaf7ff;
  --bg-end: #fff7d6;
  --board-bg: #fffdf7;
  --ink: #2d3a4a;
  --muted: #6b7a8c;
  --card-border: #d9e7f2;
  --card-shadow: 0 16px 36px rgba(83, 124, 160, 0.14);
  --target: #ffd54a;
  --target-deep: #ffbe0b;
  --add: #5bb6ff;
  --sub: #ff9f5a;
  --success: #3bcb72;
  --danger: #ff6b6b;
  --panel: rgba(255, 255, 255, 0.86);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Trebuchet MS", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 213, 74, 0.38), transparent 30%),
    radial-gradient(circle at top right, rgba(91, 182, 255, 0.25), transparent 24%),
    linear-gradient(180deg, var(--bg-start), var(--bg-end));
}

body {
  padding: 24px;
}

button,
select {
  font: inherit;
}

.app-shell {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
}

.hud,
.board-panel,
.side-panel,
.message-bar,
.modal-card,
.info-card,
.hud-card,
.status-pill {
  background: var(--panel);
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(10px);
}

.hud {
  display: grid;
  grid-template-columns: 1.15fr 0.5fr 1fr 1.2fr auto;
  gap: 16px;
  padding: 18px;
  border-radius: 28px;
  align-items: stretch;
}

.hud-card {
  border-radius: 24px;
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 92px;
}

.hud-card--target {
  background: linear-gradient(145deg, #ffe98f, #ffd54a);
}

.hud-card--operator.operator-add {
  background: linear-gradient(145deg, #d9f1ff, #8fd0ff);
}

.hud-card--operator.operator-sub {
  background: linear-gradient(145deg, #ffe6cc, #ffb67a);
}

.hud-card--selected {
  background: linear-gradient(145deg, #f7fbff, #eef7ff);
}

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

.hud-card--stat {
  min-height: 92px;
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  align-items: center;
  text-align: center;
}

.hud-actions {
  display: grid;
  gap: 12px;
  align-content: center;
}

.hud-label {
  font-size: 15px;
  color: var(--muted);
}

.hud-value {
  font-size: 30px;
  font-weight: 900;
}

.hud-value--xl {
  font-size: 54px;
  line-height: 1;
}

.hud-value--lg {
  font-size: 44px;
  line-height: 1;
}

.hud-value--md {
  font-size: 28px;
}

.hud-helper {
  font-size: 15px;
  color: var(--muted);
}

.icon-button,
.button,
.dpad__button {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease, opacity 0.14s ease;
}

.icon-button:hover,
.button:hover,
.dpad__button:hover {
  transform: translateY(-2px) scale(1.01);
}

.icon-button:active,
.button:active,
.dpad__button:active {
  transform: translateY(1px) scale(0.98);
}

.icon-button {
  width: 58px;
  height: 58px;
  font-size: 24px;
  background: linear-gradient(180deg, #ffffff, #ecf7ff);
  color: var(--ink);
  box-shadow: inset 0 -3px 0 rgba(45, 58, 74, 0.08);
}

.game-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(260px, 0.72fr);
  gap: 20px;
  align-items: start;
}

.board-panel {
  border-radius: 28px;
  padding: 18px;
}

.board-header {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.status-pill {
  border-radius: 999px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-pill__label {
  color: var(--muted);
  font-size: 14px;
}

.status-pill__value {
  font-weight: 800;
  font-size: 20px;
}

.canvas-frame {
  position: relative;
  border-radius: 26px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 251, 240, 0.4)),
    var(--board-bg);
  border: 1px solid rgba(168, 197, 219, 0.65);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
  overflow: hidden;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
}

.floating-feedback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 900;
  opacity: 0;
  text-shadow: 0 8px 24px rgba(255, 255, 255, 0.85);
}

.floating-feedback.is-visible {
  animation: pop-fade 0.78s ease forwards;
}

.floating-feedback.success {
  color: var(--success);
}

.floating-feedback.error {
  color: var(--danger);
}

.side-panel {
  border-radius: 28px;
  padding: 18px;
  display: grid;
  gap: 16px;
}

.info-card {
  border-radius: 24px;
  padding: 18px;
}

.info-card h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.info-card p {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.5;
}

.info-card--goal {
  background: linear-gradient(180deg, #fff8d6, #fff3b2);
}

.info-card--tip {
  background: linear-gradient(180deg, #eef8ff, #dff0ff);
}

.dpad {
  display: grid;
  grid-template-columns: repeat(3, minmax(54px, 1fr));
  gap: 10px;
  align-items: center;
  justify-items: center;
  padding-top: 8px;
}

.dpad__button {
  width: 64px;
  height: 64px;
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(180deg, #ffffff, #eef7ff);
  box-shadow: inset 0 -4px 0 rgba(45, 58, 74, 0.08);
}

.dpad__button[data-dir="up"] {
  grid-column: 2;
}

.dpad__button[data-dir="left"] {
  grid-column: 1;
  grid-row: 2;
}

.dpad__button[data-dir="down"] {
  grid-column: 2;
  grid-row: 2;
}

.dpad__button[data-dir="right"] {
  grid-column: 3;
  grid-row: 2;
}

.message-bar {
  border-radius: 24px;
  padding: 16px 22px;
}

.message-bar__text {
  text-align: center;
  font-size: 20px;
  font-weight: 700;
}

.overlay {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(45, 58, 74, 0.32);
  padding: 20px;
  z-index: 10;
}

.overlay--visible {
  display: grid;
}

.modal-card {
  width: min(720px, 100%);
  border-radius: 32px;
  padding: 32px;
}

.screen {
  display: none;
}

.screen--active {
  display: block;
}

.modal-badge {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  background: #fff7cb;
  color: #876400;
  font-weight: 800;
  font-size: 14px;
}

.modal-card h1,
.modal-card h2 {
  margin: 14px 0 8px;
  font-size: clamp(34px, 4vw, 48px);
}

.modal-lead {
  margin: 0;
  font-size: 20px;
  color: var(--muted);
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 26px 0 22px;
}

.setting-card,
.mini-rule,
.result-card {
  border-radius: 22px;
  border: 1px solid var(--card-border);
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.setting-card {
  display: grid;
  gap: 10px;
  padding: 18px;
  font-weight: 700;
}

.setting-card select {
  border-radius: 16px;
  border: 1px solid #c7dceb;
  background: #fffdf8;
  padding: 12px 14px;
  color: var(--ink);
}

.mini-rules {
  display: grid;
  gap: 12px;
}

.mini-rule {
  padding: 16px 18px;
  font-size: 18px;
  font-weight: 700;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  min-height: 56px;
  padding: 14px 28px;
  font-size: 20px;
  font-weight: 800;
}

.button--primary {
  color: #1f2d3d;
  background: linear-gradient(180deg, #ffe27b, #ffc83a);
  box-shadow: 0 12px 20px rgba(255, 200, 58, 0.35), inset 0 -4px 0 rgba(120, 89, 0, 0.12);
}

.button--secondary {
  color: var(--ink);
  background: linear-gradient(180deg, #ffffff, #eef7ff);
  box-shadow: inset 0 -4px 0 rgba(45, 58, 74, 0.08);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.result-card {
  padding: 18px;
  text-align: center;
}

.result-card span {
  display: block;
  font-size: 15px;
  color: var(--muted);
}

.result-card strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
}

@keyframes pop-fade {
  0% {
    opacity: 0;
    transform: scale(0.7) translateY(18px);
  }
  20% {
    opacity: 1;
    transform: scale(1.04) translateY(0);
  }
  100% {
    opacity: 0;
    transform: scale(1) translateY(-18px);
  }
}

@media (max-width: 1120px) {
  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hud-actions {
    grid-auto-flow: column;
    justify-content: start;
  }

  .game-stage {
    grid-template-columns: 1fr;
  }

  .side-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  body {
    padding: 14px;
  }

  .hud,
  .side-panel,
  .board-panel,
  .modal-card {
    padding: 14px;
  }

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

  .hud-stats,
  .settings-grid,
  .results-grid,
  .side-panel {
    grid-template-columns: 1fr;
  }

  .message-bar__text,
  .info-card p,
  .mini-rule,
  .modal-lead {
    font-size: 18px;
  }

  .hud-value--xl {
    font-size: 44px;
  }

  .button {
    width: 100%;
    justify-content: center;
  }

  .modal-actions {
    flex-direction: column;
  }
}