/* ============================================================
   메모리 카드 (DUO Memory) — 두뇌 짝 맞추기 게임
   2026-05-21
   다크 톤 + 3D 카드 플립 + 테마별 그라데이션
   ============================================================ */

:root {
  --mem-bg: #0B0915;
  --mem-bg-card: #161226;
  --mem-bg-board: #1F1733;
  --mem-bg-hud: #1A1430;
  --mem-border: #2E2548;
  --mem-border-bright: #4A3D6E;
  --mem-text: #F5F1FF;
  --mem-text-dim: #A99DCE;
  --mem-text-muted: #6B5F8C;
  --mem-accent: #8B5CF6;       /* 보라 */
  --mem-accent-bright: #A78BFA;
  --mem-accent-dark: #5B21B6;
  --mem-gold: #F59E0B;
  --mem-success: #10B981;
  --mem-danger: #EF4444;
  --mem-warn: #FBBF24;
  --mem-cyan: #06B6D4;
  --mem-pink: #EC4899;
  --mem-shadow: 0 4px 24px rgba(0,0,0,0.5);
  --mem-shadow-card: 0 6px 20px rgba(91,33,182,0.25), 0 2px 6px rgba(0,0,0,0.4);
  --mem-radius: 12px;
  --mem-radius-lg: 18px;
  --mem-radius-sm: 8px;

  /* 테마별 카드 앞면 그라데이션 */
  --mem-theme-animal-1: #FBBF24;
  --mem-theme-animal-2: #D97706;
  --mem-theme-food-1: #FB923C;
  --mem-theme-food-2: #DC2626;
  --mem-theme-face-1: #F472B6;
  --mem-theme-face-2: #BE185D;
  --mem-theme-nature-1: #34D399;
  --mem-theme-nature-2: #065F46;
}

body {
  background: var(--mem-bg);
  color: var(--mem-text);
}

/* === Page Shell === */
.mem-page-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px;
  min-height: calc(100vh - 60px);
}
.mem-side-ad { display: none; }
@media (min-width: 1200px) {
  .mem-page-shell {
    grid-template-columns: 160px 1fr 160px;
    gap: 16px;
  }
  .mem-side-ad { display: block; min-height: 600px; }
}

.mem-app {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  width: 100%;
}

/* === Screens === */
.mem-screen { display: none; width: 100%; max-width: 1080px; }
.mem-screen.active {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* === SETUP === */
.mem-setup {
  background: linear-gradient(180deg, var(--mem-bg-card), #1A132D);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--mem-shadow);
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 580px;
  margin: 0 auto;
}
.mem-setup::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(139,92,246,0.12), transparent 50%);
  pointer-events: none;
}
.mem-setup-emoji {
  font-size: 64px;
  line-height: 1;
  margin-bottom: 8px;
  animation: mem-pulse 2.4s ease-in-out infinite;
}
@keyframes mem-pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.08); }
}
.mem-setup-title {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
  background: linear-gradient(180deg, #E9D5FF, #A78BFA);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.mem-setup-sub {
  color: var(--mem-text-dim);
  font-size: 14px;
  margin-bottom: 18px;
}
.mem-setup-preview {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 18px 0;
}
.mem-prev-card {
  width: 46px;
  height: 60px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 900;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}
.mem-prev-card.mem-prev-flip {
  background: linear-gradient(135deg, var(--mem-theme-animal-1), var(--mem-theme-animal-2));
  color: #FFF;
  animation: mem-prev-flip 3s ease-in-out infinite;
}
.mem-prev-card.mem-prev-back {
  background: linear-gradient(135deg, var(--mem-accent-bright), var(--mem-accent-dark));
  color: rgba(255,255,255,0.85);
  text-shadow: 0 2px 4px rgba(0,0,0,0.4);
  position: relative;
  overflow: hidden;
}
.mem-prev-card.mem-prev-back::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px dashed rgba(255,255,255,0.25);
  border-radius: 5px;
}
@keyframes mem-prev-flip {
  0%, 30%, 100% { transform: rotateY(0); }
  50%, 80%      { transform: rotateY(180deg); }
}

.mem-setup-section {
  margin: 16px 0;
}
.mem-setup-section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--mem-text-muted);
  margin-bottom: 10px;
}

/* 난이도 탭 */
.mem-difficulty-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}
.mem-diff-tab {
  background: var(--mem-bg-hud);
  border: 2px solid var(--mem-border);
  color: var(--mem-text-dim);
  padding: 14px 8px;
  border-radius: var(--mem-radius);
  cursor: pointer;
  transition: all 0.2s;
}
.mem-diff-tab:hover {
  border-color: var(--mem-border-bright);
  transform: translateY(-2px);
}
.mem-diff-tab.active {
  background: linear-gradient(180deg, var(--mem-accent-bright), var(--mem-accent-dark));
  border-color: var(--mem-accent-bright);
  color: #FFF;
  box-shadow: 0 4px 16px rgba(139,92,246,0.4);
}
.mem-diff-label { font-size: 11px; font-weight: 700; opacity: 0.85; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.mem-diff-grid { font-size: 22px; font-weight: 900; line-height: 1; margin-bottom: 4px; }
.mem-diff-pairs { font-size: 11px; opacity: 0.75; }

/* 테마 탭 */
.mem-theme-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.mem-theme-tab {
  background: var(--mem-bg-hud);
  border: 2px solid var(--mem-border);
  color: var(--mem-text-dim);
  padding: 12px 4px;
  border-radius: var(--mem-radius);
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.mem-theme-tab span {
  font-size: 28px;
  line-height: 1;
  filter: grayscale(0.3);
  transition: filter 0.2s;
}
.mem-theme-tab div { font-size: 12px; font-weight: 700; }
.mem-theme-tab:hover { border-color: var(--mem-border-bright); }
.mem-theme-tab:hover span { filter: grayscale(0); }
.mem-theme-tab.active {
  border-color: var(--mem-accent-bright);
  background: rgba(139,92,246,0.15);
  color: var(--mem-text);
  box-shadow: 0 0 0 1px var(--mem-accent-bright);
}
.mem-theme-tab.active span { filter: grayscale(0); transform: scale(1.1); }

.mem-setup-btn {
  display: inline-block;
  background: linear-gradient(180deg, var(--mem-accent-bright), var(--mem-accent-dark));
  color: #FFF;
  font-weight: 900;
  font-size: 18px;
  border: none;
  border-radius: 14px;
  padding: 16px 32px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(139,92,246,0.4), inset 0 1px 0 rgba(255,255,255,0.2);
  transition: transform 0.1s, box-shadow 0.2s;
  margin: 12px 0 0;
  width: 100%;
}
.mem-setup-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(139,92,246,0.55), inset 0 1px 0 rgba(255,255,255,0.2);
}

.mem-setup-hint {
  color: var(--mem-text-dim);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 18px;
  text-align: left;
  background: rgba(0,0,0,0.25);
  border-radius: var(--mem-radius);
  padding: 12px 16px;
  border-left: 3px solid var(--mem-accent);
}
.mem-setup-hint b { color: var(--mem-text); }
.mem-setup-hint code {
  background: rgba(0,0,0,0.4);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 12px;
  color: var(--mem-accent-bright);
}

/* 개인 베스트 */
.mem-personal-best {
  background: var(--mem-bg-card);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-lg);
  padding: 18px;
  box-shadow: var(--mem-shadow);
  width: 100%;
  max-width: 580px;
  margin: 0 auto;
}
.mem-pb-title {
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--mem-text);
}
.mem-pb-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}
.mem-pb-card {
  background: var(--mem-bg-hud);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-sm);
  padding: 12px 8px;
  text-align: center;
}
.mem-pb-card[data-has-record="1"] {
  border-color: var(--mem-gold);
  background: linear-gradient(180deg, rgba(245,158,11,0.08), transparent);
}
.mem-pb-diff {
  font-size: 13px;
  font-weight: 800;
  color: var(--mem-text);
  margin-bottom: 4px;
}
.mem-pb-score {
  font-size: 22px;
  font-weight: 900;
  color: var(--mem-gold);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.mem-pb-meta {
  font-size: 11px;
  color: var(--mem-text-muted);
  margin-top: 4px;
}

/* === PLAY === */
.mem-play-main {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  width: 100%;
}

/* HUD */
.mem-hud {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr auto;
  gap: 10px;
  width: 100%;
  max-width: 720px;
  padding: 14px 16px;
  background: linear-gradient(180deg, var(--mem-bg-hud), #14102A);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-lg);
  box-shadow: var(--mem-shadow);
}
.mem-hud-block { text-align: center; min-width: 0; }
.mem-hud-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--mem-text-muted);
  text-transform: uppercase;
  margin-bottom: 2px;
}
.mem-hud-time-value, .mem-hud-attempts-value, .mem-hud-matches-value, .mem-hud-combo-value {
  font-size: 22px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.mem-hud-time-value { color: var(--mem-text); }
.mem-hud-attempts-value { color: var(--mem-cyan); }
.mem-hud-matches-value { color: var(--mem-success); }
.mem-hud-combo-value { color: var(--mem-accent-bright); }
.mem-hud-combo-value.mem-combo-active { animation: mem-combo-bounce 0.3s ease; }
@keyframes mem-combo-bounce {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}
.mem-hud-controls {
  display: flex;
  flex-direction: column;
  gap: 4px;
  justify-content: center;
}
.mem-icon-btn {
  background: var(--mem-bg-card);
  border: 1px solid var(--mem-border);
  color: var(--mem-text);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.mem-icon-btn:hover {
  border-color: var(--mem-border-bright);
  background: var(--mem-bg-hud);
}
.mem-icon-btn.mem-muted { opacity: 0.4; }
.mem-icon-btn-give { color: var(--mem-danger); }

/* Board */
.mem-board-wrap {
  position: relative;
  width: 100%;
  max-width: 720px;
  background: linear-gradient(180deg, #251B40, #1F1733);
  border: 2px solid var(--mem-border-bright);
  border-radius: var(--mem-radius-lg);
  padding: 16px;
  box-shadow: var(--mem-shadow), inset 0 2px 8px rgba(0,0,0,0.4);
}
.mem-board {
  display: grid;
  gap: 8px;
  width: 100%;
  user-select: none;
}
.mem-board[data-diff="4"] { grid-template-columns: repeat(4, 1fr); }
.mem-board[data-diff="6"] { grid-template-columns: repeat(6, 1fr); gap: 7px; }
.mem-board[data-diff="8"] { grid-template-columns: repeat(8, 1fr); gap: 6px; }

/* Card 3D Flip */
.mem-card {
  aspect-ratio: 1;
  perspective: 1000px;
  cursor: pointer;
  position: relative;
}
.mem-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}
.mem-card.flipped .mem-card-inner,
.mem-card.matched .mem-card-inner {
  transform: rotateY(180deg);
}
.mem-card-face {
  position: absolute;
  inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--mem-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  box-shadow: var(--mem-shadow-card);
  overflow: hidden;
}
.mem-card-back {
  background: linear-gradient(135deg, var(--mem-accent-bright), var(--mem-accent-dark));
  color: rgba(255,255,255,0.85);
  font-size: 28px;
  text-shadow: 0 2px 6px rgba(0,0,0,0.5);
  position: relative;
}
.mem-card-back::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(255,255,255,0.25);
  border-radius: calc(var(--mem-radius-sm) - 3px);
  pointer-events: none;
}
.mem-card-back::after {
  content: "🃏";
  font-size: 0.9em;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}
.mem-board[data-diff="6"] .mem-card-back { font-size: 22px; }
.mem-board[data-diff="8"] .mem-card-back { font-size: 18px; }

.mem-card-front {
  transform: rotateY(180deg);
  font-size: 32px;
}
.mem-board[data-diff="6"] .mem-card-front { font-size: 26px; }
.mem-board[data-diff="8"] .mem-card-front { font-size: 22px; }

/* 테마별 카드 앞면 그라데이션 */
.mem-card[data-theme="animal"] .mem-card-front {
  background: linear-gradient(135deg, var(--mem-theme-animal-1), var(--mem-theme-animal-2));
}
.mem-card[data-theme="food"] .mem-card-front {
  background: linear-gradient(135deg, var(--mem-theme-food-1), var(--mem-theme-food-2));
}
.mem-card[data-theme="face"] .mem-card-front {
  background: linear-gradient(135deg, var(--mem-theme-face-1), var(--mem-theme-face-2));
}
.mem-card[data-theme="nature"] .mem-card-front {
  background: linear-gradient(135deg, var(--mem-theme-nature-1), var(--mem-theme-nature-2));
}

/* 카드 hover (선택 가능한 상태) */
.mem-card:not(.flipped):not(.matched):hover .mem-card-inner {
  transform: translateY(-3px) scale(1.03);
  filter: brightness(1.15);
}

/* 매칭 성공 */
.mem-card.matched {
  cursor: default;
  pointer-events: none;
  animation: mem-match-flash 0.6s ease-out;
}
.mem-card.matched .mem-card-front {
  box-shadow: 0 0 24px var(--mem-gold), 0 0 0 2px var(--mem-gold), inset 0 0 10px rgba(255,255,255,0.3);
}
.mem-card.matched .mem-card-inner {
  animation: mem-match-pulse 1.6s ease-in-out infinite;
}
@keyframes mem-match-flash {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.12); filter: brightness(1.4); }
  100% { transform: scale(1); }
}
@keyframes mem-match-pulse {
  0%, 100% { transform: rotateY(180deg) scale(1); }
  50%      { transform: rotateY(180deg) scale(0.96); }
}

/* 매칭 실패 (잠시 후 다시 뒤집힘) */
.mem-card.wrong .mem-card-front {
  box-shadow: 0 0 16px var(--mem-danger), 0 0 0 2px var(--mem-danger);
  animation: mem-shake 0.4s ease-in-out;
}
@keyframes mem-shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-4px); }
  40%      { transform: translateX(4px); }
  60%      { transform: translateX(-3px); }
  80%      { transform: translateX(3px); }
}

/* 미리보기 페이드아웃 */
.mem-card.preview .mem-card-inner {
  transform: rotateY(180deg);
}

/* 콤보 컷인 */
.mem-combo-cutin {
  position: absolute;
  top: 30%;
  right: -10px;
  font-size: 48px;
  font-weight: 900;
  color: var(--mem-accent-bright);
  -webkit-text-stroke: 2px #FFF;
  text-shadow: 0 0 24px rgba(139,92,246,0.8), 0 4px 12px rgba(0,0,0,0.6);
  opacity: 0;
  pointer-events: none;
  z-index: 20;
  letter-spacing: -1px;
}
.mem-combo-cutin.mem-show {
  animation: mem-cutin-show 0.8s ease-out;
}
@keyframes mem-cutin-show {
  0%   { opacity: 0; transform: translateX(40px) scale(0.6) rotate(-8deg); }
  20%  { opacity: 1; transform: translateX(0) scale(1.2) rotate(0deg); }
  60%  { opacity: 1; transform: translateX(0) scale(1) rotate(0deg); }
  100% { opacity: 0; transform: translateX(-20px) scale(0.9) rotate(0deg); }
}

/* Floating +N */
.mem-floating-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 15;
  overflow: hidden;
}
.mem-float-num {
  position: absolute;
  font-weight: 900;
  font-size: 22px;
  color: var(--mem-gold);
  text-shadow: 0 2px 6px rgba(0,0,0,0.7), 0 0 12px rgba(245,158,11,0.6);
  pointer-events: none;
  animation: mem-float-up 1.2s ease-out forwards;
}
@keyframes mem-float-up {
  0%   { opacity: 0; transform: translateY(0) scale(0.6); }
  20%  { opacity: 1; transform: translateY(-12px) scale(1.1); }
  100% { opacity: 0; transform: translateY(-70px) scale(0.9); }
}

.mem-credit {
  font-size: 11px;
  color: var(--mem-text-muted);
  text-align: center;
  margin-top: 4px;
}

/* === END === */
.mem-end-card {
  background: linear-gradient(180deg, var(--mem-bg-card), #1A132D);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--mem-shadow);
  position: relative;
  overflow: hidden;
}
.mem-end-grade {
  font-size: 88px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
  -webkit-text-stroke: 2px rgba(0,0,0,0.3);
  letter-spacing: -2px;
  animation: mem-grade-in 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.mem-end-grade.mem-grade-s { color: #F59E0B; text-shadow: 0 0 30px rgba(245,158,11,0.5); }
.mem-end-grade.mem-grade-a { color: #10B981; text-shadow: 0 0 24px rgba(16,185,129,0.4); }
.mem-end-grade.mem-grade-b { color: #3B82F6; text-shadow: 0 0 20px rgba(59,130,246,0.4); }
.mem-end-grade.mem-grade-c { color: #8B5CF6; text-shadow: 0 0 16px rgba(139,92,246,0.4); }
.mem-end-grade.mem-grade-d { color: #6B7280; }
@keyframes mem-grade-in {
  0%   { opacity: 0; transform: scale(0.3) rotate(-20deg); }
  60%  { opacity: 1; transform: scale(1.2) rotate(5deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}
.mem-end-title {
  font-size: 14px;
  color: var(--mem-text-dim);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.mem-end-score {
  font-size: 56px;
  font-weight: 900;
  color: var(--mem-gold);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  margin-bottom: 18px;
}
.mem-end-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  background: rgba(0,0,0,0.25);
  border-radius: var(--mem-radius);
  padding: 12px;
  margin-bottom: 18px;
}
.mem-end-stat { text-align: center; }
.mem-end-stat-label {
  display: block;
  font-size: 11px;
  color: var(--mem-text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.mem-end-stat-val {
  font-size: 20px;
  font-weight: 900;
  color: var(--mem-text);
}
.mem-end-best {
  font-size: 13px;
  color: var(--mem-text-dim);
  margin-top: 6px;
}
.mem-end-best.mem-new-best {
  color: var(--mem-gold);
  font-weight: 900;
  font-size: 16px;
  animation: mem-best-glow 1.6s ease-in-out infinite;
}
@keyframes mem-best-glow {
  0%, 100% { text-shadow: 0 0 0 transparent; }
  50%      { text-shadow: 0 0 20px rgba(245,158,11,0.6); }
}
.mem-end-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}
@media (min-width: 600px) {
  .mem-end-actions { flex-direction: row; }
  .mem-end-actions > * { flex: 1; }
}

/* === Buttons === */
.mem-btn-primary {
  background: linear-gradient(180deg, var(--mem-accent-bright), var(--mem-accent-dark));
  color: #FFF;
  font-weight: 900;
  font-size: 16px;
  border: none;
  border-radius: 12px;
  padding: 14px 20px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(139,92,246,0.4), inset 0 1px 0 rgba(255,255,255,0.2);
  transition: transform 0.1s, box-shadow 0.2s;
}
.mem-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139,92,246,0.55), inset 0 1px 0 rgba(255,255,255,0.2);
}
.mem-btn-secondary {
  background: var(--mem-bg-hud);
  color: var(--mem-text);
  font-weight: 700;
  font-size: 15px;
  border: 1px solid var(--mem-border-bright);
  border-radius: 12px;
  padding: 14px 20px;
  cursor: pointer;
  transition: all 0.15s;
}
.mem-btn-secondary:hover {
  background: var(--mem-bg-card);
  border-color: var(--mem-text-dim);
}
.mem-btn-ghost {
  background: transparent;
  color: var(--mem-text-dim);
  font-weight: 700;
  font-size: 15px;
  border: 1px solid var(--mem-border);
  border-radius: 12px;
  padding: 14px 20px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.mem-btn-ghost:hover {
  color: var(--mem-text);
  border-color: var(--mem-border-bright);
}

/* === SEO Info === */
.mem-info-card {
  background: var(--mem-bg-card);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-lg);
  padding: 24px;
  margin-top: 16px;
  max-width: 900px;
  width: 100%;
  color: var(--mem-text-dim);
  font-size: 14px;
  line-height: 1.7;
}
.mem-info-card h2 { color: var(--mem-text); font-size: 22px; margin: 0 0 12px; }
.mem-info-card h3 { color: var(--mem-text); font-size: 16px; margin: 18px 0 8px; }
.mem-info-card dl { display: grid; grid-template-columns: 100px 1fr; gap: 6px 12px; margin: 8px 0; }
.mem-info-card dt { color: var(--mem-text-muted); font-weight: 700; }
.mem-info-card ul { padding-left: 20px; margin: 8px 0; }
.mem-info-card li { margin-bottom: 4px; }
.mem-info-card a { color: var(--mem-accent-bright); text-decoration: none; }
.mem-info-card a:hover { text-decoration: underline; }
.mem-info-card .seo-info-tags { color: var(--mem-text-muted); font-size: 12px; }

/* === Toast === */
.mem-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  background: rgba(15,9,25,0.95);
  border: 1px solid var(--mem-border-bright);
  color: var(--mem-text);
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--mem-shadow);
  z-index: 2000;
  pointer-events: none;
  transition: transform 0.3s ease-out;
}
.mem-toast.show { transform: translateX(-50%) translateY(0); }

/* === MULTI ============================================================ */

/* Loading 화면 */
.mem-loading-card {
  background: linear-gradient(180deg, var(--mem-bg-card), #1A132D);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-lg);
  padding: 48px 32px;
  text-align: center;
  box-shadow: var(--mem-shadow);
  width: 100%;
  max-width: 380px;
  margin: 60px auto 0;
}
.mem-loading-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--mem-border);
  border-top-color: var(--mem-accent-bright);
  border-radius: 50%;
  margin: 0 auto 18px;
  animation: mem-spin 1s linear infinite;
}
@keyframes mem-spin {
  to { transform: rotate(360deg); }
}
.mem-loading-text {
  color: var(--mem-text);
  font-weight: 700;
  font-size: 16px;
}

/* Entry/Lobby input */
.mem-setup-input {
  width: 100%;
  max-width: 320px;
  margin: 8px auto;
  display: block;
  padding: 12px 14px;
  background: var(--mem-bg-hud);
  border: 1px solid var(--mem-border);
  border-radius: 10px;
  color: var(--mem-text);
  font-size: 14px;
  font-weight: 600;
  text-align: center;
}
.mem-setup-input:focus {
  outline: none;
  border-color: var(--mem-accent);
}
.mem-setup-btn-secondary {
  background: var(--mem-bg-hud);
  color: var(--mem-text);
  border: 1px solid var(--mem-border-bright);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.mem-setup-btn-secondary:hover {
  background: var(--mem-bg-card);
}
.mem-login-warn {
  background: rgba(245,158,11,0.12);
  border: 1px solid var(--mem-warn);
  color: var(--mem-text);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  margin: 8px auto 12px;
  max-width: 360px;
}

/* Lobby */
.mem-lobby {
  background: linear-gradient(180deg, var(--mem-bg-card), #1A132D);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-lg);
  padding: 22px 20px;
  box-shadow: var(--mem-shadow);
  width: 100%;
  max-width: 580px;
  margin: 0 auto;
}
.mem-lobby-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.mem-lobby-title {
  font-size: 22px;
  font-weight: 900;
  color: var(--mem-text);
}
.mem-lobby-invite {
  background: rgba(0,0,0,0.3);
  border-radius: var(--mem-radius);
  padding: 12px 14px;
  margin-bottom: 14px;
}
.mem-lobby-invite-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--mem-text-muted);
  margin-bottom: 6px;
}
.mem-lobby-invite-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.mem-lobby-invite-code {
  font-size: 24px;
  font-weight: 900;
  color: var(--mem-gold);
  letter-spacing: 4px;
  font-variant-numeric: tabular-nums;
  flex: 1 1 auto;
  min-width: 0;
  user-select: all;
}
.mem-lobby-options {
  background: rgba(0,0,0,0.2);
  border-radius: var(--mem-radius);
  padding: 12px 14px;
  margin-bottom: 14px;
}
.mem-lobby-opt-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  font-weight: 700;
  color: var(--mem-text);
}
.mem-lobby-opt-hint {
  font-size: 11px;
  color: var(--mem-text-muted);
  margin-top: 8px;
}
.mem-lobby-roster-head {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--mem-text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.mem-lobby-roster {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 280px;
  overflow-y: auto;
}
.mem-lobby-roster li {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--mem-bg-hud);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius-sm);
  font-size: 14px;
}
.mem-roster-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  background-color: var(--mem-bg-card);
  border: 1px solid var(--mem-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 900;
  color: #FFF;
}
.mem-roster-avatar-initial {
  background: linear-gradient(135deg, var(--mem-accent-bright), var(--mem-accent-dark));
}
.mem-roster-nick {
  font-weight: 700;
  color: var(--mem-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mem-roster-host-tag {
  font-size: 11px;
  font-weight: 800;
  color: var(--mem-gold);
  background: rgba(245,158,11,0.15);
  border: 1px solid var(--mem-gold);
  padding: 2px 6px;
  border-radius: 4px;
}
.mem-roster-kick {
  background: transparent;
  color: var(--mem-danger);
  border: 1px solid var(--mem-danger);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  cursor: pointer;
}
.mem-roster-disconnect {
  color: var(--mem-text-muted);
  font-size: 11px;
}

/* Play layout (3-column) */
.mem-play-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}
@media (min-width: 1024px) {
  .mem-play-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 16px;
  }
}

/* Turn Spotlight (현재 차례 큰 아바타) */
.mem-turn-spotlight {
  background: linear-gradient(135deg, var(--mem-accent-dark), var(--mem-accent));
  border: 2px solid var(--mem-accent-bright);
  border-radius: var(--mem-radius-lg);
  padding: 14px 20px;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto 8px;
  box-shadow: 0 6px 28px rgba(139,92,246,0.4);
  position: relative;
  overflow: hidden;
}
.mem-turn-spotlight::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.15), transparent 60%);
  pointer-events: none;
}
.mem-turn-label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  margin-bottom: 8px;
}
.mem-turn-content {
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
}
.mem-turn-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  background-color: var(--mem-bg-hud);
  border: 3px solid var(--mem-gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  color: #FFF;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(245,158,11,0.6);
  animation: mem-turn-glow 1.8s ease-in-out infinite;
}
.mem-turn-avatar.mem-roster-avatar-initial {
  background: linear-gradient(135deg, var(--mem-accent-bright), var(--mem-accent-dark));
}
@keyframes mem-turn-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(245,158,11,0.6); }
  50%      { box-shadow: 0 0 32px rgba(245,158,11,0.9); }
}
.mem-turn-info {
  flex: 1;
  min-width: 0;
}
.mem-turn-nick {
  font-size: 20px;
  font-weight: 900;
  color: #FFF;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mem-turn-stats {
  font-size: 13px;
  color: rgba(255,255,255,0.85);
  margin-top: 2px;
}
.mem-turn-combo {
  color: var(--mem-gold);
  font-weight: 800;
}
.mem-turn-sep { opacity: 0.5; margin: 0 6px; }
.mem-turn-score { font-weight: 700; }
.mem-turn-timer {
  font-size: 32px;
  font-weight: 900;
  color: #FFF;
  font-variant-numeric: tabular-nums;
  min-width: 50px;
  text-align: right;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}
.mem-turn-timer.mem-warn-soft { color: var(--mem-warn); }
.mem-turn-timer.mem-warn-hard {
  color: var(--mem-danger);
  animation: mem-time-pulse 0.5s ease-in-out infinite;
}
@keyframes mem-time-pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.12); }
}
/* 내 차례일 때 강조 */
.mem-turn-spotlight.mem-my-turn {
  background: linear-gradient(135deg, #F59E0B, #DC2626);
  border-color: var(--mem-gold);
  box-shadow: 0 6px 36px rgba(245,158,11,0.5);
}

/* Left leaderboard */
.mem-multi-left { width: 100%; }
.mem-leaderboard {
  background: var(--mem-bg-card);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius);
  padding: 12px;
  box-shadow: var(--mem-shadow);
}
.mem-leaderboard-head {
  margin-bottom: 10px;
}
.mem-leaderboard-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--mem-text);
}
.mem-leaderboard-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mem-leaderboard-list li {
  display: grid;
  grid-template-columns: 22px 32px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  background: var(--mem-bg-hud);
  border: 1px solid var(--mem-border);
  border-radius: 6px;
  font-size: 13px;
  transition: all 0.2s;
}
.mem-leaderboard-list li.mem-lb-me {
  border-color: var(--mem-gold);
  background: rgba(245,158,11,0.1);
}
.mem-leaderboard-list li.mem-lb-current-turn {
  border-color: var(--mem-accent-bright);
  background: rgba(139,92,246,0.15);
  box-shadow: 0 0 0 1px var(--mem-accent-bright);
}
.mem-leaderboard-list li.mem-lb-rank-1 { border-color: var(--mem-gold); }
.mem-leaderboard-list li.mem-lb-rank-2 { border-color: #C0C0C0; }
.mem-leaderboard-list li.mem-lb-rank-3 { border-color: #CD7F32; }
.mem-leaderboard-list li.mem-lb-disconnected { opacity: 0.5; }
.mem-leaderboard-list .mem-lb-rank {
  font-weight: 900;
  text-align: center;
  color: var(--mem-text-dim);
}
.mem-leaderboard-list li.mem-lb-rank-1 .mem-lb-rank { color: var(--mem-gold); }
.mem-leaderboard-list li.mem-lb-rank-2 .mem-lb-rank { color: #C0C0C0; }
.mem-leaderboard-list li.mem-lb-rank-3 .mem-lb-rank { color: #CD7F32; }
.mem-leaderboard-list .mem-lb-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  background-color: var(--mem-bg-card);
  border: 1px solid var(--mem-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 900;
  color: #FFF;
}
.mem-leaderboard-list .mem-lb-avatar.mem-roster-avatar-initial {
  background: linear-gradient(135deg, var(--mem-accent-bright), var(--mem-accent-dark));
}
.mem-leaderboard-list .mem-lb-nick {
  font-weight: 700;
  color: var(--mem-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mem-leaderboard-list .mem-lb-score {
  font-weight: 900;
  color: var(--mem-gold);
  font-variant-numeric: tabular-nums;
}

/* 카드 클릭 권한 표시 */
.mem-board[data-my-turn="0"] .mem-card:not(.matched) {
  cursor: not-allowed;
}
.mem-board[data-my-turn="0"] .mem-card:not(.flipped):not(.matched):hover .mem-card-inner {
  transform: none;
  filter: brightness(0.85);
}

/* 다른 사람이 뒤집은 카드 (자기 차례 외) — 그대로 표시, 다만 보더 살짝 */
.mem-card.peer-flipped .mem-card-front {
  box-shadow: 0 0 16px var(--mem-accent-bright), inset 0 0 10px rgba(167,139,250,0.2);
}

/* 멀티 컨트롤 */
.mem-multi-controls {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 8px;
}

/* Final ranking */
.mem-final-ranking {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mem-final-ranking li {
  display: grid;
  grid-template-columns: 40px 44px 1fr auto auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--mem-bg-hud);
  border: 1px solid var(--mem-border);
  border-radius: var(--mem-radius);
  font-size: 14px;
}
.mem-final-ranking li.mem-final-rank-1 {
  border-color: var(--mem-gold);
  background: linear-gradient(180deg, rgba(245,158,11,0.12), transparent);
  box-shadow: 0 0 0 1px var(--mem-gold);
}
.mem-final-ranking li.mem-final-rank-2 { border-color: #C0C0C0; }
.mem-final-ranking li.mem-final-rank-3 { border-color: #CD7F32; }
.mem-final-medal { font-size: 26px; text-align: center; }
.mem-final-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  background-color: var(--mem-bg-card);
  border: 2px solid var(--mem-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #FFF;
}
.mem-final-ranking li.mem-final-rank-1 .mem-final-avatar { border-color: var(--mem-gold); }
.mem-final-ranking li.mem-final-rank-2 .mem-final-avatar { border-color: #C0C0C0; }
.mem-final-ranking li.mem-final-rank-3 .mem-final-avatar { border-color: #CD7F32; }
.mem-final-avatar.mem-roster-avatar-initial {
  background: linear-gradient(135deg, var(--mem-accent-bright), var(--mem-accent-dark));
}
.mem-final-nick {
  font-weight: 800;
  color: var(--mem-text);
  font-size: 16px;
}
.mem-final-score {
  font-weight: 900;
  color: var(--mem-gold);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
}
.mem-final-meta {
  font-size: 12px;
  color: var(--mem-text-muted);
  text-align: right;
  min-width: 80px;
}

/* Multi responsive */
@media (max-width: 1023px) {
  .mem-play-layout { grid-template-columns: 1fr; }
  .mem-multi-left { order: 2; }
  .mem-play-main { order: 1; }
  .mem-leaderboard-list { flex-direction: row; flex-wrap: wrap; }
  .mem-leaderboard-list li { flex: 1 1 calc(50% - 4px); grid-template-columns: 18px 24px 1fr auto; }
}
@media (max-width: 640px) {
  .mem-lobby { padding: 16px 14px; }
  .mem-lobby-title { font-size: 18px; }
  .mem-lobby-invite-code { font-size: 18px; letter-spacing: 2px; }
  .mem-turn-spotlight { padding: 10px 14px; }
  .mem-turn-avatar { width: 44px; height: 44px; font-size: 18px; }
  .mem-turn-nick { font-size: 16px; }
  .mem-turn-timer { font-size: 24px; }
  .mem-final-ranking li {
    grid-template-columns: 32px 36px 1fr auto;
    gap: 8px;
    padding: 10px;
  }
  .mem-final-medal { font-size: 22px; }
  .mem-final-avatar { width: 36px; height: 36px; font-size: 15px; }
  .mem-final-nick { font-size: 14px; }
  .mem-final-score { font-size: 16px; }
  .mem-final-meta { display: none; }
}

/* === Utility === */
.mem-hidden { display: none !important; }

/* === Responsive === */
@media (max-width: 640px) {
  .mem-setup { padding: 24px 16px; }
  .mem-setup-title { font-size: 28px; }
  .mem-setup-emoji { font-size: 52px; }
  .mem-hud {
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-template-rows: auto auto;
    padding: 12px;
    gap: 8px;
  }
  .mem-hud-controls {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: center;
  }
  .mem-hud-time-value, .mem-hud-attempts-value, .mem-hud-matches-value, .mem-hud-combo-value { font-size: 18px; }
  .mem-end-grade { font-size: 68px; }
  .mem-end-score { font-size: 42px; }
  .mem-end-stat-val { font-size: 16px; }
  .mem-board-wrap { padding: 10px; }
  .mem-board[data-diff="8"] { gap: 4px; }
  .mem-board[data-diff="8"] .mem-card-back,
  .mem-board[data-diff="8"] .mem-card-front { font-size: 16px; }
  .mem-pb-grid { gap: 6px; }
  .mem-pb-card { padding: 10px 4px; }
  .mem-pb-score { font-size: 18px; }
  .mem-theme-tab span { font-size: 24px; }
  .mem-diff-grid { font-size: 18px; }
  .mem-info-card { padding: 16px; }
  .mem-info-card dl { grid-template-columns: 1fr; }
}