:root {
  --bg: #0f1729;
  --bg-elev: #1a2440;
  --text: #f5f7fa;
  --text-dim: #9aa3b8;
  --accent: #6c8eff;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 10px 40px rgba(0,0,0,0.4);
  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo",
               "Noto Sans KR", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

a { color: inherit; text-decoration: none; }

.hidden { display: none !important; }

.hero {
  text-align: center;
  padding: 56px 20px 32px;
  background: radial-gradient(ellipse at top, rgba(108,142,255,0.18), transparent 70%);
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero .tagline {
  color: var(--text-dim);
  font-size: clamp(0.95rem, 3vw, 1.05rem);
}

.exam-banner {
  max-width: 600px;
  margin: 16px auto 0;
  padding: 14px 20px;
  background: linear-gradient(135deg, rgba(255,217,61,0.12), rgba(108,142,255,0.08));
  border: 1px solid rgba(255,217,61,0.35);
  border-radius: 14px;
  text-align: center;
  font-size: 0.95rem;
  color: var(--text);
}

.exam-banner strong {
  color: #ffd93d;
}

.exam-banner .sub {
  display: block;
  margin-top: 4px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.game-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  overflow: hidden;
}

.game-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 0% 0%, var(--card-color, #6c8eff) 0%, transparent 50%);
  opacity: 0.08;
  pointer-events: none;
}

.game-card[data-color="#ff6b6b"] { --card-color: #ff6b6b; }
.game-card[data-color="#4ecdc4"] { --card-color: #4ecdc4; }
.game-card[data-color="#ffd93d"] { --card-color: #ffd93d; }
.game-card[data-color="#a8e6cf"] { --card-color: #a8e6cf; }
.game-card[data-color="#ff9ff3"] { --card-color: #ff9ff3; }
.game-card[data-color="#ff8b94"] { --card-color: #ff8b94; }
.game-card[data-color="#82c4ff"] { --card-color: #82c4ff; }
.game-card[data-color="#b6a4ff"] { --card-color: #b6a4ff; }
.game-card[data-color="#ffaa6e"] { --card-color: #ffaa6e; }
.game-card[data-color="#7be0d2"] { --card-color: #7be0d2; }
.game-card[data-color="#fce38a"] { --card-color: #fce38a; }

.game-card:not(.coming-soon):hover {
  transform: translateY(-4px);
  border-color: var(--card-color, var(--accent));
  box-shadow: var(--shadow);
}

.game-card.coming-soon {
  opacity: 0.6;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s, border-color 0.2s;
}

.game-card.coming-soon:hover {
  opacity: 0.85;
  transform: translateY(-2px);
  border-color: var(--card-color, var(--accent));
}

.game-card.coming-soon:active {
  transform: scale(0.98);
}

.game-icon {
  font-size: 2.5rem;
  margin-bottom: 14px;
}

.game-card h2 {
  font-size: 1.25rem;
  margin-bottom: 6px;
  font-weight: 700;
}

.game-card p {
  color: var(--text-dim);
  font-size: 0.93rem;
  margin-bottom: 18px;
  flex: 1;
}

.play-btn {
  display: inline-block;
  padding: 8px 16px;
  background: var(--card-color, var(--accent));
  color: #0f1729;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.88rem;
  z-index: 1;
}

.game-card.coming-soon .play-btn {
  background: rgba(255,255,255,0.1);
  color: var(--text-dim);
}

.site-footer {
  text-align: center;
  padding: 32px 20px;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ===== 게임 페이지 공통 ===== */

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-dim);
  transition: color 0.15s, border-color 0.15s;
}

.back-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

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

.game-stage {
  max-width: 600px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.stat-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.stat {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  text-align: center;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.stat-value.warn { color: #ff6b6b; }

.btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent);
  color: #0f1729;
  border: 0;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.1s, opacity 0.15s;
}

.btn:hover { opacity: 0.9; }
.btn:active { transform: scale(0.97); }

.btn-secondary {
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
}

.share-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 16px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: 0;
  font-family: inherit;
  transition: transform 0.1s, opacity 0.15s;
}

.share-btn:active { transform: scale(0.96); }
.share-btn.kakao { background: #fee500; color: #181600; }
.share-btn.copy { background: var(--bg-elev); color: var(--text); border: 1px solid var(--border); }

/* ===== 광고 슬롯 ===== */

.ad-slot {
  margin: 48px auto;        /* 인접 콘텐츠와 충분한 간격 (정책 안전) */
  padding: 12px 0;
  text-align: center;
  max-width: 728px;         /* 가로 배너 표준 폭 */
  min-height: 60px;
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.ad-slot::before {
  content: "광고";
  display: block;
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  opacity: 0.55;
}

.ad-slot .adsbygoogle {
  display: block;
  min-height: 50px;
  max-height: 100px;        /* 가로 배너 높이 제한 */
}

/* ===== 섹션 타이틀 ===== */

.section-title {
  font-size: 1rem;
  margin: 36px 0 14px;
  color: var(--text-dim);
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
  margin-left: 4px;
}

/* ===== 본인 순위 표시 ===== */

.rank-position {
  font-size: 0.95rem;
  color: var(--text-dim);
  margin: 0 0 12px;
  min-height: 1.5em;
}

.rank-position strong { color: var(--text); font-weight: 700; }

.rank-position.highlighted {
  color: #ffd93d;
  font-weight: 600;
}

.rank-position.highlighted strong {
  color: #ffd93d;
  font-size: 1.1rem;
}

.rank-position.loading::after {
  content: '...';
  display: inline-block;
  width: 1em;
  text-align: left;
  animation: dots 1.2s steps(4) infinite;
}

@keyframes dots {
  0%   { content: ''; }
  25%  { content: '.'; }
  50%  { content: '..'; }
  75%  { content: '...'; }
}

/* ===== 랭킹 등록 ===== */

.rank-submit {
  margin: 16px 0;
  padding: 14px;
  background: rgba(108, 142, 255, 0.08);
  border: 1px solid rgba(108, 142, 255, 0.25);
  border-radius: 12px;
  text-align: left;
}

.rank-submit-title {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 8px;
  text-align: center;
}

.rank-submit-row {
  display: flex;
  gap: 8px;
}

.rank-submit input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.rank-submit input:focus { border-color: var(--accent); }

.rank-submit button {
  padding: 10px 16px;
  background: var(--accent);
  color: #0f1729;
  border: 0;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s, transform 0.1s;
}

.rank-submit button:disabled { opacity: 0.5; cursor: not-allowed; }
.rank-submit button:active { transform: scale(0.96); }

.rank-submit-msg {
  font-size: 0.85rem;
  margin-top: 8px;
  text-align: center;
  color: var(--text-dim);
}

.rank-submit-msg.error { color: #ff6b6b; }
.rank-submit-msg.success { color: #2ed573; font-weight: 600; }

.rank-submit.done .rank-submit-row { display: none; }

/* 메인 랭킹 카드 */
.leaderboard-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, rgba(255,217,61,0.12), rgba(108,142,255,0.06));
  border: 1px solid rgba(255,217,61,0.3);
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 20px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s, border-color 0.15s;
}

.leaderboard-cta:hover {
  transform: translateY(-2px);
  border-color: #ffd93d;
}

.leaderboard-cta .lb-text strong {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
}

.leaderboard-cta .lb-text span {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.leaderboard-cta .lb-arrow {
  font-size: 1.3rem;
  color: #ffd93d;
}

.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: var(--bg);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}