/* ==========================================================================
   GameToolbox 공통 스타일 (네비게이션, 푸터, 다크모드, 카드, 광고 영역)
   ========================================================================== */

:root {
  --bg: #f5f6fa;
  --bg-elevated: #ffffff;
  --fg: #1c1e26;
  --fg-muted: #5b5f6b;
  --border: #e2e4ea;
  --accent: #4a6cf7;
  --accent-hover: #3a5ce0;
  --correct: #1f9d55;
  --incorrect: #e0324b;
  --incorrect-bg: rgba(224, 50, 75, 0.12);
  --shadow: 0 2px 10px rgba(20, 22, 30, 0.06);
  --radius: 12px;
  --max-width: 860px;
}

[data-theme="dark"] {
  --bg: #14161c;
  --bg-elevated: #1d2029;
  --fg: #e9eaf0;
  --fg-muted: #9aa0ae;
  --border: #2b2e3a;
  --accent: #6d8bff;
  --accent-hover: #8199ff;
  --correct: #3ddc84;
  --incorrect: #ff5c72;
  --incorrect-bg: rgba(255, 92, 114, 0.16);
  --shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161c;
    --bg-elevated: #1d2029;
    --fg: #e9eaf0;
    --fg-muted: #9aa0ae;
    --border: #2b2e3a;
    --accent: #6d8bff;
    --accent-hover: #8199ff;
    --correct: #3ddc84;
    --incorrect: #ff5c72;
    --incorrect-bg: rgba(255, 92, 114, 0.16);
    --shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  transition: background 0.2s ease, color 0.2s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ---------- 네비게이션 ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-brand {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--fg-muted);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a.external {
  color: var(--accent);
  font-weight: 600;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--fg);
  border-radius: 999px;
  width: 2.3rem;
  height: 2.3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.05rem;
  line-height: 1;
  transition: background 0.15s ease, transform 0.1s ease;
}

.theme-toggle:hover {
  background: var(--border);
}

.theme-toggle:active {
  transform: scale(0.94);
}

/* ---------- 레이아웃 ---------- */
main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.2rem 3rem;
}

.page-title {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.page-desc {
  color: var(--fg-muted);
  margin-bottom: 1.8rem;
}

/* ---------- 카드 (게임 목록) ---------- */
.game-category {
  margin-top: 2.2rem;
}

.game-category:first-of-type {
  margin-top: 0;
}

.category-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin: 0 0 0.9rem;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.1rem;
}

.game-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.game-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  text-decoration: none;
}

.game-card .game-icon {
  font-size: 2.1rem;
  line-height: 1;
}

.game-card h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--fg);
}

.game-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--fg-muted);
}

.game-card .badge {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: rgba(74, 108, 247, 0.12);
  color: var(--accent);
}

.game-card.coming-soon {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

/* ---------- 공통 버튼 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.7rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn:hover {
  background: var(--accent-hover);
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn-outline:hover {
  background: rgba(74, 108, 247, 0.1);
}

/* ---------- 광고 영역 ---------- */
.ad-slot {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.82rem;
  background: var(--bg-elevated);
  margin: 1.6rem 0;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 안내/팁 섹션 ---------- */
.info-section {
  margin-top: 2.4rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--border);
}

.info-section h2 {
  font-size: 1.2rem;
  margin-bottom: 0.7rem;
}

.info-section p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin-bottom: 0.9rem;
}

.info-section ul {
  color: var(--fg-muted);
  font-size: 0.95rem;
  padding-left: 1.3rem;
}

.info-section li {
  margin-bottom: 0.45rem;
}

/* ---------- 푸터 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 1.6rem 1.2rem;
  margin-top: 2rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--fg-muted);
}

.footer-links a.external {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- 게임 공통 UI (패널/통계바/결과화면) ---------- */
.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.stat-bar {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.stat-bar .btn-sm {
  margin-left: auto;
}

.hint {
  margin: 0.7rem 0 0;
  font-size: 0.82rem;
  color: var(--fg-muted);
  text-align: center;
}

.result-panel {
  text-align: center;
}

.result-title {
  margin: 0 0 1.2rem;
  font-size: 1.4rem;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
  margin-bottom: 0.4rem;
}

.result-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.result-value {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.result-label {
  font-size: 0.78rem;
  color: var(--fg-muted);
}

/* ---------- 캔버스 아케이드 게임 공통 (스네이크/벽돌깨기/슈팅/테트리스) ---------- */
.arcade-app {
  margin-top: 1rem;
}

.arcade-controls {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.arcade-wrap {
  position: relative;
  width: max-content;
  max-width: 100%;
  margin: 1rem auto 0;
}

.arcade-screen {
  display: block;
  background: #0d1117;
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.06);
  max-width: 100%;
  height: auto;
  touch-action: none;
}

/* ---------- 게임 오버레이 (보드 위에 뜨는 결과 팝업: 2048/지뢰찾기 등) ---------- */
.game-overlay {
  position: absolute;
  inset: 0;
  background: rgba(20, 22, 30, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  border-radius: var(--radius);
}

.game-overlay[hidden] {
  display: none;
}

.overlay-card {
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 1.4rem;
  width: min(88vw, 320px);
  text-align: center;
  box-shadow: var(--shadow);
}

.overlay-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.3rem;
}

.overlay-card p {
  margin: 0 0 0.9rem;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.overlay-actions {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  margin-top: 0.9rem;
  flex-wrap: wrap;
}

/* ---------- 반응형 ---------- */
@media (max-width: 480px) {
  .page-title {
    font-size: 1.4rem;
  }

  main {
    padding: 1.4rem 1rem 2.4rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel {
    padding: 1.1rem;
  }

  .stat-bar .btn-sm {
    order: 3;
    margin-left: 0;
    width: 100%;
  }

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