@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  color-scheme: light;
  --bg: #f6f4ef;
  --ink: #1a1c20;
  --muted: #6c6f75;
  --card: #ffffff;
  --shadow: 0 22px 45px rgba(20, 20, 20, 0.12);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Space Grotesk', 'Noto Sans SC', system-ui, sans-serif;
  background: radial-gradient(circle at 15% 20%, #ffe8cc 0%, transparent 45%),
    radial-gradient(circle at 85% 0%, #d5e7ff 0%, transparent 40%),
    var(--bg);
  color: var(--ink);
  height: 100vh;
  height: 100svh;
  overflow: hidden;
}

.page {
  height: 100vh;
  height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 28px clamp(16px, 3vw, 36px);
  gap: 22px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.back {
  text-decoration: none;
  background: #111827;
  color: #fff;
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 600;
}

.title {
  font-weight: 700;
  font-size: 1.3rem;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--muted);
}

.rules-btn {
  background: #ff6f5c;
  border: none;
  color: white;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
}

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

.panel {
  background: var(--card);
  border-radius: var(--radius);
  padding: clamp(16px, 2vw, 26px);
  box-shadow: var(--shadow);
  min-height: 0;
  height: 100%;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 20px;
}

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

.panel-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.panel-desc {
  color: var(--muted);
}

.panel-actions {
  display: flex;
  gap: 10px;
}

.ghost {
  border: 1px solid #dde1e7;
  background: #f8f9fc;
  padding: 10px 16px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
}

.game-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 18px;
  height: 100%;
  align-items: stretch;
}

.canvas-wrap {
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  max-height: 100%;
  display: flex;
  align-items: stretch;
  justify-self: center;
  align-self: center;
}

#gameCanvas {
  width: 100%;
  height: 100%;
  display: block;
  background: #f8f3e8;
  border-radius: 20px;
  box-shadow: inset 0 0 0 2px #f0e4cf;
}

.side-info {
  background: #f9fafc;
  border-radius: 20px;
  padding: 16px;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
  justify-content: space-between;
}

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

.hint {
  color: var(--muted);
}

.legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.rule-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(520px, 90vw);
  background: var(--card);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 22px;
  display: none;
  z-index: 20;
}

.rule-panel.show {
  display: block;
}

.rule-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.rule-title {
  font-weight: 700;
  font-size: 1.2rem;
}

.close {
  border: none;
  background: #eef1f8;
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
}

.rule-body {
  color: var(--muted);
  line-height: 1.6;
  white-space: pre-line;
}

@media (max-width: 980px) {
  .game-area {
    grid-template-columns: 1fr;
  }

  .side-info {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
  }
}

@media (max-width: 700px) {
  .topbar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
  }

  .controls {
    flex-wrap: nowrap;
    gap: 6px;
  }

  .controls .ghost,
  .controls .rules-btn {
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  .panel-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel-actions {
    width: 100%;
  }

  .status {
    font-size: clamp(0.85rem, 3.2vw, 1rem);
    letter-spacing: 0.02em;
  }

  .hint,
  .legend {
    font-size: clamp(0.78rem, 2.8vw, 0.95rem);
    line-height: 1.35;
  }

  .legend {
    display: none;
  }

  #gameCanvas {
    aspect-ratio: 1 / 1;
  }
}