:root {
  --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Outfit', -apple-system, sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-sm: 10px;
  --border-radius-md: 18px;
  --border-radius-lg: 28px;
  --border-radius-circle: 50%;
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.18);
  --color-primary: #7c3aed;
  --color-primary-hover: #6d28d9;
  --color-primary-light: rgba(124, 58, 237, 0.15);
  --color-secondary: #06b6d4;
  --color-secondary-hover: #0891b2;
  --color-success: #22c55e;
  --color-success-hover: #16a34a;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-danger-light: rgba(239, 68, 68, 0.15);
}

body.dark-theme {
  --bg-app: #0c0a0f;
  --bg-card: rgba(24, 24, 27, 0.7);
  --bg-card-hover: rgba(39, 39, 42, 0.85);
  --bg-card-face: #fafafa;
  --bg-card-face-back: #f5f5f7;
  --bg-input: rgba(24, 24, 27, 0.6);
  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-inverse: #18181b;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-active: rgba(124, 58, 237, 0.4);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  --glass-border: 1px solid rgba(255, 255, 255, 0.08);
  --paper-line-color: rgba(99, 102, 241, 0.15);
}

body.light-theme {
  --bg-app: #f4f4f5;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --bg-card-face: #ffffff;
  --bg-card-face-back: #faf9f6;
  --bg-input: rgba(255, 255, 255, 0.9);
  --text-main: #18181b;
  --text-muted: #71717a;
  --text-inverse: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-active: rgba(124, 58, 237, 0.4);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
  --glass-border: 1px solid rgba(255, 255, 255, 0.4);
  --paper-line-color: rgba(99, 102, 241, 0.12);
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

.bg-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: var(--border-radius-circle);
  filter: blur(120px);
  z-index: -1;
  opacity: 0.18;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

body.light-theme .bg-glow {
  opacity: 0.07;
}

.bg-glow-1 {
  background: var(--color-primary);
  top: -100px;
  right: -50px;
}

.bg-glow-2 {
  background: var(--color-secondary);
  bottom: -100px;
  left: -50px;
}

.app-container {
  width: 100%;
  max-width: 960px;
  min-height: 100vh;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  position: relative;
  z-index: 10;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-radius: var(--border-radius-md);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-text h1 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-weight: 600;
}

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

.nav-btn {
  background: transparent;
  color: var(--text-main);
  border: 1px solid transparent;
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  background: var(--bg-input);
  border-color: var(--border-color);
}

.nav-btn.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: var(--border-color-active);
}

.theme-toggle-btn {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--border-color-active);
  transform: translateY(-2px);
}

body.dark-theme .sun-icon {
  display: block;
}

body.dark-theme .moon-icon {
  display: none;
}

body.light-theme .sun-icon {
  display: none;
}

body.light-theme .moon-icon {
  display: block;
}

.view-section {
  display: none;
  flex-direction: column;
  flex: 1;
  justify-content: center;
  animation: fadeIn var(--transition-normal) forwards;
}

.view-section.active {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.game-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  border: var(--glass-border);
  box-shadow: var(--shadow-sm);
  padding: 12px 20px;
  border-radius: var(--border-radius-md);
  margin-bottom: 16px;
}

.timer-counter {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  background: var(--bg-input);
  padding: 6px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.card-pagination {
  display: flex;
  align-items: center;
  gap: 16px;
}

.pagination-arrow-btn {
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.pagination-arrow-btn:hover:not(:disabled) {
  background: var(--color-primary-light);
  color: var(--color-primary);
  transform: scale(1.1);
}

.pagination-arrow-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.pagination-info {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pagination-info .active-index {
  color: var(--color-primary);
}

.pagination-info .pagination-sep {
  font-weight: 400;
  color: var(--text-muted);
}

.pagination-info .total-index {
  color: var(--text-muted);
}

.correct-badge {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--color-success);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.check-badge-icon {
  stroke: var(--color-success);
}

.deck-title-container {
  text-align: center;
  margin-bottom: 20px;
}

.deck-title-container h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
}

.game-playfield {
  display: flex;
  gap: 36px;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px auto;
  width: 100%;
  max-width: 680px;
}

.card-workspace {
  position: relative;
  width: 100%;
  max-width: 500px;
  height: 350px;
  perspective: 1500px;
}

.card-container {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform var(--transition-slow);
  cursor: pointer;
}

.card-container.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 4px;
  padding: 32px 32px 32px 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(var(--paper-line-color) 1px, transparent 1px) 0 12px / 100% 28px, var(--bg-card-face);
  color: #1e293b;
  border: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.card-back {
  background: linear-gradient(var(--paper-line-color) 1px, transparent 1px) 0 12px / 100% 28px, var(--bg-card-face-back);
  transform: rotateY(180deg);
}

.notebook-spiral {
  position: absolute;
  top: 8px;
  left: 32px;
  right: 32px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  z-index: 10;
}

.notebook-spiral span {
  width: 12px;
  height: 12px;
  background: #cbd5e1;
  border: 1px solid #94a3b8;
  border-radius: 50%;
  box-shadow: inset 0 2px 3px rgba(0, 0, 0, 0.15);
}

body.dark-theme .notebook-spiral span {
  background: #334155;
  border-color: #475569;
}

.notebook-red-line {
  position: absolute;
  left: 60px;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: rgba(239, 68, 68, 0.35);
  pointer-events: none;
}

.card-content-wrapper {
  padding-left: 56px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.card-main-data {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 800;
  text-align: center;
  word-break: break-word;
  max-width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #1e293b;
}

.card-back .card-main-data {
  font-size: 38px;
  background: linear-gradient(135deg, #1e293b, var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.card-img {
  max-width: 100%;
  max-height: 240px;
  border-radius: 6px;
  object-fit: contain;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: white;
}

.grading-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.grade-sheet-btn {
  position: relative;
  width: 84px;
  height: 104px;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.12);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  opacity: 0.2;
  pointer-events: none;
  transform: scale(0.95);
}

.grade-sheet-btn.visible {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

.correct-sheet {
  color: var(--color-success);
  transform: rotate(-3deg);
}

.correct-sheet.visible {
  transform: rotate(-3deg) scale(1);
}

.incorrect-sheet {
  color: var(--color-danger);
  transform: rotate(4deg);
}

.incorrect-sheet.visible {
  transform: rotate(4deg) scale(1);
}

.grade-sheet-btn:hover {
  transform: scale(1.08) rotate(0deg) !important;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.18);
}

.sheet-pin {
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 12px;
  background: rgba(226, 232, 240, 0.75);
  border: 1px solid rgba(203, 213, 225, 0.5);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.correct-sheet .sheet-pin {
  transform: translateX(-50%) rotate(-4deg);
}

.incorrect-sheet .sheet-pin {
  transform: translateX(-50%) rotate(3deg);
}

.card-swipe-next {
  animation: swipeNext 0.4s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.card-swipe-prev {
  animation: swipePrev 0.4s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.card-swipe-correct {
  animation: swipeCorrect 0.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.card-swipe-incorrect {
  animation: swipeIncorrect 0.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes swipeNext {
  0% {
    transform: translateX(0) scale(1) rotate(0);
    opacity: 1;
  }

  45% {
    transform: translateX(80px) scale(0.95) rotate(3deg);
    opacity: 0;
  }

  50% {
    transform: translateX(-80px) scale(0.95) rotate(-3deg);
    opacity: 0;
  }

  100% {
    transform: translateX(0) scale(1) rotate(0);
    opacity: 1;
  }
}

@keyframes swipePrev {
  0% {
    transform: translateX(0) scale(1) rotate(0);
    opacity: 1;
  }

  45% {
    transform: translateX(-80px) scale(0.95) rotate(-3deg);
    opacity: 0;
  }

  50% {
    transform: translateX(80px) scale(0.95) rotate(3deg);
    opacity: 0;
  }

  100% {
    transform: translateX(0) scale(1) rotate(0);
    opacity: 1;
  }
}

@keyframes swipeCorrect {
  0% {
    transform: scale(1) translate(0, 0) rotateY(180deg);
    opacity: 1;
  }

  50% {
    transform: scale(1.05) translate(120px, -80px) rotateY(180deg) rotate(15deg);
    opacity: 0;
  }

  51% {
    transform: scale(0.9) translate(-120px, 80px) rotateY(0deg);
    opacity: 0;
  }

  100% {
    transform: scale(1) translate(0, 0) rotateY(0deg);
    opacity: 1;
  }
}

@keyframes swipeIncorrect {
  0% {
    transform: scale(1) translate(0, 0) rotateY(180deg);
    opacity: 1;
  }

  20% {
    transform: scale(1) translate(-10px, 0) rotateY(180deg);
  }

  40% {
    transform: scale(1) translate(10px, 0) rotateY(180deg);
  }

  60% {
    transform: scale(1.05) translate(120px, 80px) rotateY(180deg) rotate(-15deg);
    opacity: 0;
  }

  61% {
    transform: scale(0.9) translate(-120px, -80px) rotateY(0deg);
    opacity: 0;
  }

  100% {
    transform: scale(1) translate(0, 0) rotateY(0deg);
    opacity: 1;
  }
}

.game-bottom-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  border: var(--glass-border);
  padding: 12px 20px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
}

.bottom-left-group,
.bottom-right-group {
  display: flex;
  gap: 12px;
  align-items: center;
}

.bottom-action-btn {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.bottom-action-btn:hover {
  border-color: var(--color-primary-active);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.btn-flip-primary {
  background: #2b2b24;
  color: #fafaf9;
  border: none;
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: 700;
  padding: 10px 42px;
  border-radius: 30px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast);
}

.btn-flip-primary:hover {
  background: #3f3f37;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.3);
}

#btn-mute-toggle .volume-mute-icon {
  display: none;
}

#btn-mute-toggle.muted .volume-up-icon {
  display: none;
}

#btn-mute-toggle.muted .volume-mute-icon {
  display: block;
}

.keyboard-tips {
  text-align: center;
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.5px;
}

.editor-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
  align-items: start;
}

.editor-pane {
  background: var(--bg-card);
  border: var(--glass-border);
  backdrop-filter: blur(12px);
  border-radius: var(--border-radius-md);
  padding: 24px;
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.editor-pane h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input {
  font-family: var(--font-primary);
  font-size: 14px;
  padding: 12px;
  border-radius: var(--border-radius-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  outline: none;
  transition: all var(--transition-fast);
}

.form-group input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.editor-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.file-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.cpanel-note {
  margin-top: 12px;
  padding: 12px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px dashed rgba(245, 158, 11, 0.3);
  border-radius: var(--border-radius-sm);
  display: flex;
  gap: 10px;
}

.cpanel-note p {
  font-size: 11px;
  line-height: 1.4;
  color: var(--text-muted);
}

.editor-cards-list-pane {
  min-height: 500px;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-circle-add {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px dashed var(--border-color-active);
  font-family: var(--font-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.btn-circle-add:hover {
  background: var(--color-primary);
  color: white;
  border-style: solid;
  transform: translateY(-1px);
}

.editor-cards-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 4px;
}

.editor-cards-container::-webkit-scrollbar {
  width: 6px;
}

.editor-cards-container::-webkit-scrollbar-track {
  background: transparent;
}

.editor-cards-container::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--border-radius-sm);
}

.editor-cards-container::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

.editor-card-row {
  display: grid;
  grid-template-columns: 40px 1fr 1fr 40px;
  gap: 10px;
  align-items: center;
  padding: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  animation: cardRowAdded 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes cardRowAdded {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.row-num {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-muted);
  text-align: center;
  font-size: 14px;
}

.editor-card-row input {
  width: 100%;
  font-family: var(--font-primary);
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  outline: none;
}

.editor-card-row input:focus {
  border-color: var(--color-primary);
}

.btn-remove-row {
  background: transparent;
  color: var(--text-muted);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.btn-remove-row:hover {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.editor-footer-actions {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: auto;
}

.action-btn {
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.w-100 {
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  color: white;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: var(--glass-border);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-active);
  transform: translateY(-2px);
}

.btn-danger-outline {
  background: transparent;
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
}

.btn-danger-outline:hover {
  background: var(--color-danger-light);
}

.btn-success {
  background: var(--color-success);
  color: white;
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.3);
}

.btn-success:hover {
  background: var(--color-success-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
}

.cursor-pointer {
  cursor: pointer;
}

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

.victory-card {
  max-width: 480px;
  margin: 0 auto;
  background: var(--bg-card);
  border: var(--glass-border);
  backdrop-filter: blur(12px);
  border-radius: var(--border-radius-lg);
  padding: 48px 32px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.trophy-wrapper {
  position: relative;
  width: 100px;
  height: 100px;
  margin-bottom: 12px;
}

.trophy-emoji {
  font-size: 72px;
  position: relative;
  z-index: 10;
  animation: victoryBounce 2s ease-in-out infinite;
}

.trophy-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 110px;
  height: 110px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.4) 0%, rgba(245, 158, 11, 0) 70%);
  border-radius: var(--border-radius-circle);
  z-index: 1;
  animation: victoryPulse 2s infinite;
}

@keyframes victoryBounce {

  0%,
  100% {
    transform: translateY(0) scale(1);
  }

  50% {
    transform: translateY(-12px) scale(1.05);
  }
}

@keyframes victoryPulse {

  0%,
  100% {
    transform: translate(-50%, -50%) scale(0.9);
    opacity: 0.5;
  }

  50% {
    transform: translate(-50%, -50%) scale(1.2);
    opacity: 0.9;
  }
}

.victory-card h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-warning), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.victory-card p {
  color: var(--text-muted);
  font-size: 15px;
}

.victory-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
  margin: 12px 0;
}

.stat-box {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 16px;
  border-radius: var(--border-radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-val {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--color-primary);
}

.stat-lbl {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 600;
}

.victory-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.victory-actions .action-btn {
  width: 100%;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background: var(--bg-card);
  border: var(--glass-border);
  backdrop-filter: blur(16px);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: modalScaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes modalScaleIn {
  from {
    transform: scale(0.9) translateY(20px);
    opacity: 0;
  }

  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 28px;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  transition: color var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--color-danger);
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-body p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
}

.link-copy-container {
  display: flex;
  gap: 8px;
}

.link-copy-container input {
  flex: 1;
  font-family: var(--font-primary);
  font-size: 13px;
  padding: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: var(--border-radius-sm);
  outline: none;
}

.copy-status-text {
  font-size: 12px;
  color: var(--color-success);
  font-weight: 600;
  text-align: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.copy-status-text.active {
  opacity: 1;
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-card);
  border: 1px solid var(--color-primary);
  border-left: 5px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
  padding: 16px 24px;
  border-radius: var(--border-radius-sm);
  color: var(--text-main);
  font-size: 14px;
  font-weight: 500;
  z-index: 10000;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
  pointer-events: none;
}

.toast.active {
  transform: translateY(0);
  opacity: 1;
}

#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
}

.app-footer-credits {
  text-align: center;
  color: var(--text-muted);
  font-size: 11px;
  margin-top: 12px;
}

@media (max-width: 768px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }

  .game-playfield {
    flex-direction: column;
    gap: 20px;
  }

  .grading-panel {
    flex-direction: row;
    justify-content: center;
    width: 100%;
  }

  .grade-sheet-btn {
    width: 100px;
    height: 80px;
  }

  .card-workspace {
    height: 280px;
  }

  .card-main-data {
    font-size: 48px;
  }

  .card-back .card-main-data {
    font-size: 28px;
  }

  .app-header {
    flex-direction: column;
    gap: 16px;
    padding: 16px;
    text-align: center;
  }

  .nav-controls {
    width: 100%;
    justify-content: center;
  }

  .nav-btn span {
    display: none;
  }

  .nav-btn {
    padding: 8px 12px;
  }

  .keyboard-tips {
    display: none;
  }
}

/* ==========================================================================
   Card Grading Feedback Overlay
   Shown briefly on the card after the user clicks ✓ or ✗
   ========================================================================== */

.card-feedback-overlay {
  position: absolute;
  inset: 0;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  z-index: 20;
  transition: opacity 0.15s ease;
}

.card-feedback-overlay.show-correct {
  background: rgba(34, 197, 94, 0.18);
  opacity: 1;
}

.card-feedback-overlay.show-incorrect {
  background: rgba(239, 68, 68, 0.14);
  opacity: 1;
}

.feedback-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
}

.card-feedback-overlay.show-correct .feedback-icon svg,
.card-feedback-overlay.show-incorrect .feedback-icon svg {
  animation: feedbackPop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes feedbackPop {
  0% {
    transform: scale(0.2) rotate(-15deg);
    opacity: 0;
  }

  60% {
    transform: scale(1.12) rotate(4deg);
    opacity: 1;
  }

  100% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
}