@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  color-scheme: light;
  --page: #f6f7fb;
  --surface: #ffffff;
  --ink: #20243a;
  --muted: #81869b;
  --primary: #6958e8;
  --primary-dark: #5140d0;
  --primary-soft: #efedff;
  --border: #e9eaf2;
  --success: #239b78;
  --danger: #e66e7b;
  --card-back: #7163e9;
  --radius: 18px;
  --shadow: 0 8px 30px rgb(37 39 74 / 5%);
}

[hidden] {
  display: none !important;
}

button,
select,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid rgb(105 88 232 / 40%);
  outline-offset: 4px;
}

.game-shell {
  width: min(100% - 36px, 760px);
  margin: 0 auto;
  padding: 0px 0 22px;
}

.game-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 44px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  color: #747991;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.back-link:hover {
  color: var(--primary);
}

.back-arrow {
  font-size: 19px;
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
}

.brand-icon {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 10px;
  background: var(--primary);
  color: white;
  font-size: 22px;
}

.brand-name {
  font-family: 'Outfit', sans-serif;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.5px;
}

.icon-button {
  justify-self: end;
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: white;
  color: #777d94;
  cursor: pointer;
  font-size: 22px;
  transition: color .2s, background .2s, transform .2s;
}

.icon-button:hover {
  background: var(--primary-soft);
  color: var(--primary);
  transform: rotate(-15deg);
}

.game-intro {
  padding: 44px 0 25px;
  text-align: center;
}

.eyebrow,
.win-eyebrow {
  color: var(--primary);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 2.1px;
}

.game-intro h1 {
  margin: 12px 0 9px;
  font-family: 'Outfit', sans-serif;
  font-size: clamp(34px, 6vw, 48px);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.12;
}

.intro-description {
  margin: 0 auto;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.stats-panel {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  min-height: 88px;
  margin-bottom: 20px;
  padding: 16px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  min-width: 0;
}

.stat-label,
.info-label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}

.stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 23px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat-divider {
  width: 1px;
  height: 38px;
  justify-self: center;
  background: var(--border);
}

.game-panel {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.game-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 23px;
}

.difficulty-control {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.difficulty-control label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .8px;
}

.difficulty-control select {
  max-width: 220px;
  min-height: 39px;
  padding: 0 30px 0 11px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
}

.preview-setting {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #747991;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  user-select: none;
}

.preview-setting input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.setting-switch {
  position: relative;
  width: 32px;
  height: 19px;
  flex: 0 0 auto;
  border-radius: 20px;
  background: #dcdfea;
  transition: background .2s;
}

.setting-switch::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: white;
  content: '';
  box-shadow: 0 1px 3px rgb(0 0 0 / 12%);
  transition: transform .2s;
}

.preview-setting input:checked + .setting-switch {
  background: var(--primary);
}

.preview-setting input:checked + .setting-switch::after {
  transform: translateX(13px);
}

.preview-setting input:focus-visible + .setting-switch {
  outline: 3px solid rgb(105 88 232 / 40%);
  outline-offset: 3px;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 41px;
  padding: 0 16px;
  border: 0;
  border-radius: 11px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  transition: background .2s, transform .2s, box-shadow .2s;
}

.button-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 10px rgb(105 88 232 / 17%);
}

.button-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 16px rgb(105 88 232 / 24%);
  transform: translateY(-1px);
}

.button-primary:active,
.button-secondary:active {
  transform: scale(.98);
}

.button-secondary {
  border: 1px solid var(--border);
  background: white;
  color: var(--ink);
}

.button-secondary:hover {
  background: #f7f7fc;
}

.game-info {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
}

.info-item {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 5px;
  min-width: 0;
  font-size: 12px;
}

.info-item:first-child {
  justify-content: flex-start;
}

.info-item:last-child {
  justify-content: flex-end;
}

.info-item strong {
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}

.info-label {
  font-size: 10px;
  letter-spacing: .1px;
}

.info-muted {
  color: #a2a6b7;
}

.score-info strong {
  color: var(--primary);
}

.progress-track {
  height: 4px;
  overflow: hidden;
  margin-bottom: 19px;
  border-radius: 99px;
  background: #efeff6;
}

.progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #8675f8, #43c8a1);
  transition: width .3s ease;
}

.board-wrapper {
  position: relative;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  width: 100%;
  margin: 0 auto;
}

.game-board.easy {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.game-board.medium {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.game-board.hard {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
}

.memory-card {
  position: relative;
  display: block;
  min-width: 0;
  aspect-ratio: 1 / 1;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 13px;
  background: transparent;
  cursor: pointer;
  perspective: 600px;
  -webkit-tap-highlight-color: transparent;
}

.card-inner {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transition: transform .34s cubic-bezier(.2, .7, .25, 1);
}

.memory-card.is-flipped .card-inner,
.memory-card.is-matched .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: inherit;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.card-back {
  border-color: #e3e0ff;
  background: linear-gradient(145deg, #8274f2, #6555df);
  color: white;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 20%);
}

.card-back::before,
.card-back::after {
  position: absolute;
  width: 68%;
  height: 68%;
  border: 1px solid rgb(255 255 255 / 14%);
  border-radius: 9px;
  content: '';
  transform: rotate(45deg);
}

.card-back::after {
  width: 42%;
  height: 42%;
  border-color: rgb(255 255 255 / 19%);
  border-radius: 6px;
}

.card-pattern {
  position: relative;
  z-index: 1;
  font-family: 'Outfit', sans-serif;
  font-size: clamp(20px, 4vw, 29px);
  font-weight: 500;
  opacity: .92;
}

.card-front {
  border-color: #eceaf9;
  background: #f5f4ff;
  color: #3d365d;
  transform: rotateY(180deg);
}

.card-symbol {
  font-size: clamp(23px, 5.1vw, 43px);
  line-height: 1;
  user-select: none;
}

.game-board.hard .card-symbol {
  font-size: clamp(20px, 4vw, 33px);
}

.memory-card:not(.is-flipped):not(.is-matched):hover .card-back {
  background: linear-gradient(145deg, #9184ff, #7060ed);
}

.memory-card:not(.is-flipped):not(.is-matched):hover .card-inner {
  transform: translateY(-2px);
}

.memory-card.is-matched .card-front {
  border-color: #bdebdc;
  background: #e9faf3;
  color: #1c8d6b;
}

.memory-card.is-matched .card-front::after {
  position: absolute;
  right: 7px;
  bottom: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #37b58c;
  color: white;
  content: '✓';
  font-size: 10px;
  line-height: 15px;
}

.memory-card.is-matched {
  cursor: default;
  animation: matched-pop .35s ease;
}

.memory-card.is-wrong .card-front {
  border-color: #f4bdc4;
  background: #fff0f1;
}

.memory-card.is-wrong {
  animation: card-shake .32s ease;
}

.memory-card:disabled {
  cursor: default;
}

.preview-notice {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  border: 1px solid rgb(255 255 255 / 65%);
  border-radius: 12px;
  background: rgb(255 255 255 / 95%);
  box-shadow: 0 5px 25px rgb(34 31 75 / 12%);
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
  pointer-events: none;
  transform: translate(-50%, -50%);
}

.game-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  margin: 9px 0 -2px;
  color: #7c8197;
  font-size: 11px;
  text-align: center;
}

.status-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #a39aef;
}

.game-status.status-success {
  color: var(--success);
  font-weight: 700;
}

.game-status.status-success .status-dot {
  background: var(--success);
}

.game-status.status-warning .status-dot {
  background: var(--danger);
}

.win-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  padding: 15px;
  border-radius: 15px;
  background: rgb(246 247 251 / 84%);
  backdrop-filter: blur(5px);
  animation: fade-in .22s ease;
}

.win-card {
  width: min(100%, 350px);
  padding: 25px 23px;
  border: 1px solid #eceaf8;
  border-radius: 20px;
  background: white;
  box-shadow: 0 16px 55px rgb(35 30 85 / 13%);
  text-align: center;
}

.win-confetti {
  margin-bottom: 6px;
  color: #e8ad41;
  font-size: 23px;
}

.win-icon {
  margin-bottom: 10px;
  font-size: 43px;
}

.win-eyebrow {
  margin: 0 0 8px;
  font-size: 9px;
}

.win-card h2 {
  margin: 0;
  font-family: 'Outfit', sans-serif;
  font-size: 31px;
  letter-spacing: -1px;
}

.win-description {
  margin: 7px 0 19px;
  color: var(--muted);
  font-size: 12px;
}

.final-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 14px;
}

.final-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  padding: 12px 3px;
  border-radius: 11px;
  background: #f7f6ff;
}

.final-stat span {
  color: var(--muted);
  font-size: 9px;
}

.final-stat strong {
  font-family: 'Outfit', sans-serif;
  font-size: 17px;
  overflow-wrap: anywhere;
}

.personal-best-message {
  min-height: 17px;
  margin: 0 0 14px;
  color: var(--success);
  font-size: 11px;
  font-weight: 700;
}

.win-card .button-primary,
.win-card .button-secondary {
  width: 100%;
  margin-top: 7px;
}

.game-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 19px 3px 0;
  color: #9a9eb0;
  font-size: 10px;
}

.game-footer p {
  margin: 0;
}

@keyframes matched-pop {
  0% { transform: scale(.95); }
  55% { transform: scale(1.045); }
  100% { transform: scale(1); }
}

@keyframes card-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  50% { transform: translateX(3px); }
  75% { transform: translateX(-2px); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (min-width: 900px) {
  .game-shell {
    /* padding-top: 34px; */
  }

  .game-intro {
    padding-top: 48px;
  }

  .game-panel {
    padding: 25px;
  }

  .game-board {
    gap: 12px;
  }

  .game-board.hard {
    gap: 10px;
  }

  .memory-card {
    border-radius: 15px;
  }
}

@media (max-width: 560px) {
  .game-shell {
    width: min(100% - 22px, 440px);
    padding-top: 15px;
  }

  .brand-name {
    font-size: 15px;
  }

  .brand-icon {
    width: 29px;
    height: 29px;
  }

  .game-intro {
    padding: 33px 0 20px;
  }

  .game-intro h1 {
    font-size: 36px;
  }

  .intro-description {
    max-width: 310px;
    font-size: 12px;
  }

  .stats-panel {
    min-height: 76px;
    margin-bottom: 12px;
    padding: 12px 4px;
    border-radius: 14px;
  }

  .stat-label {
    font-size: 8px;
    letter-spacing: .7px;
  }

  .stat-value {
    font-size: 20px;
  }

  .game-panel {
    padding: 14px 10px 10px;
    border-radius: 17px;
  }

  .game-toolbar {
    gap: 10px;
    margin-bottom: 19px;
  }

  .difficulty-control select {
    max-width: 155px;
    font-size: 11px;
  }

  .preview-setting {
    gap: 5px;
    font-size: 10px;
  }

  .button-primary {
    padding: 0 11px;
  }

  .game-toolbar > .button-primary {
    min-height: 38px;
    font-size: 11px;
  }

  .game-info {
    gap: 3px;
  }

  .info-item {
    gap: 3px;
    font-size: 11px;
  }

  .info-item strong {
    font-size: 13px;
  }

  .info-label {
    font-size: 9px;
  }

  .game-board {
    gap: 7px;
  }

  .game-board.hard {
    gap: 5px;
  }

  .memory-card {
    border-radius: 9px;
  }

  .card-symbol {
    font-size: clamp(22px, 6.4vw, 32px);
  }

  .game-board.hard .card-symbol {
    font-size: clamp(18px, 5.2vw, 25px);
  }

  .game-board.hard .card-face {
    border-radius: 8px;
  }

  .game-board.hard .card-pattern {
    font-size: 19px;
  }

  .game-footer {
    font-size: 9px;
  }
}

@media (max-width: 370px) {
  .game-shell {
    width: calc(100% - 16px);
  }

  .game-panel {
    padding-right: 7px;
    padding-left: 7px;
  }

  .game-toolbar {
    gap: 8px 5px;
  }

  .difficulty-control select {
    max-width: 142px;
  }

  .preview-setting {
    font-size: 9px;
  }

  .game-board {
    gap: 5px;
  }

  .game-board.hard {
    gap: 4px;
  }

  .info-item {
    gap: 2px;
  }

  .info-label {
    font-size: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}