@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  --bg: #0b0f19;
  --bg-gradient: radial-gradient(circle at top, #182235 0%, #0b0f19 100%);
  --bg2: rgba(22, 33, 54, 0.65);
  --bg3: rgba(30, 45, 75, 0.8);
  --bg4: #1f2e4d;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.35);
  --fg: #f1f5f9;
  --fg2: #c7d2fe;
  --fg3: #818cf8;
  --fg-muted: #94a3b8;
  --green: #10b981;
  --green-dim: rgba(16, 185, 129, 0.15);
  --blue: #3b82f6;
  --yellow: #f59e0b;
  --red: #ef4444;
  --purple: #8b5cf6;
  --cyan: #06b6d4;
  --orange: #f97316;
  --font: 'JetBrains Mono', 'SF Mono', monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --display: 'Outfit', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 30px rgba(99, 102, 241, 0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--sans);
  background: var(--bg);
  background-image: var(--bg-gradient);
  color: var(--fg);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

header {
  background: rgba(11, 15, 25, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.logo {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--green), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo::before {
  content: '⚡';
  -webkit-text-fill-color: initial;
  font-size: 18px;
}

.logo span {
  background: var(--bg3);
  color: var(--fg2);
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  margin-left: 6px;
  -webkit-text-fill-color: initial;
}

nav {
  display: flex;
  background: rgba(255, 255, 255, 0.03);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

nav button {
  background: transparent;
  color: var(--fg-muted);
  border: none;
  padding: 8px 18px;
  border-radius: calc(var(--radius-sm) - 2px);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--sans);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 4px;
}

nav button:hover {
  color: var(--fg);
  background: rgba(255,255,255,0.02);
}

nav button.active {
  color: #fff;
  background: rgba(99, 102, 241, 0.15);
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.35);
  font-weight: 600;
}

nav button .badge {
  background: var(--purple);
  color: #fff;
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 10px;
  margin-left: 4px;
  font-weight: 700;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.search-box {
  flex: 1;
  min-width: 250px;
  position: relative;
}

.search-box input {
  width: 100%;
  background: var(--bg2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 11px 16px 11px 40px;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--sans);
  outline: none;
  transition: all var(--transition);
}

.search-box input:focus {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: var(--bg3);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--fg-muted);
  font-size: 16px;
  pointer-events: none;
}

.filter-group {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.03);
  padding: 3px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.filter-group button {
  background: transparent;
  color: var(--fg-muted);
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-family: var(--sans);
  transition: all var(--transition);
  white-space: nowrap;
}

.filter-group button:hover {
  color: var(--fg);
}

.filter-group button.on {
  background: var(--fg3);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
}

.cat-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.cat-tabs button {
  background: var(--bg2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--fg-muted);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 30px;
  cursor: pointer;
  font-size: 13px;
  font-family: var(--sans);
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
}

.cat-tabs button:hover {
  color: var(--fg);
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-1px);
}

.cat-tabs button.active {
  color: #fff;
  background: linear-gradient(135deg, var(--fg3), var(--purple));
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.shortcut-card {
  background: var(--bg2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}

.shortcut-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.shortcut-card.mastered {
  border-left: 4px solid var(--green);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.key-binding {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  color: var(--yellow);
  background: rgba(245, 158, 11, 0.1);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
  letter-spacing: .5px;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.diff-badge {
  font-size: 11px;
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.diff-badge.beginner {
  background: rgba(16,185,129,0.12);
  color: var(--green);
}

.diff-badge.intermediate {
  background: rgba(245,158,11,0.12);
  color: var(--yellow);
}

.diff-badge.advanced {
  background: rgba(239,68,68,0.12);
  color: var(--red);
}

.card-desc {
  font-size: 15px;
  color: var(--fg);
  margin-bottom: 6px;
  font-weight: 500;
}

.card-tip {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
  font-style: italic;
  opacity: 0.85;
}

.mastery-bar {
  height: 4px;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  margin-top: 12px;
  overflow: hidden;
}

.mastery-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green), #34d399);
  border-radius: 10px;
  transition: width .4s cubic-bezier(0.4, 0, 0.2, 1);
}

.fav-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--fg-muted);
  cursor: pointer;
  font-size: 18px;
  transition: all var(--transition);
  opacity: 0;
  transform: scale(0.8);
}

.shortcut-card:hover .fav-btn, .fav-btn.faved {
  opacity: 1;
  transform: scale(1);
}

.fav-btn.faved {
  color: var(--yellow);
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--fg-muted);
  font-size: 14px;
}

/* Quiz styling */
.quiz-container {
  max-width: 680px;
  margin: 0 auto;
}

.quiz-setup {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  align-items: center;
  background: var(--bg2);
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.quiz-setup select, .quiz-setup button {
  background: var(--bg3);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: var(--sans);
  cursor: pointer;
  outline: none;
  transition: all var(--transition);
}

.quiz-setup select:focus {
  border-color: var(--border-hover);
}

.quiz-setup button:hover {
  border-color: var(--border-hover);
  background: var(--bg4);
}

.quiz-setup button.primary {
  background: linear-gradient(135deg, var(--green), #059669);
  color: #fff;
  border: none;
  font-weight: 600;
  font-size: 14px;
  padding: 11px 28px;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.quiz-setup button.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.3);
}

.quiz-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  box-shadow: var(--shadow);
}

.quiz-card.correct {
  border-color: var(--green);
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.15);
}

.quiz-card.wrong {
  border-color: var(--red);
  box-shadow: 0 0 30px rgba(239, 68, 68, 0.15);
}

.quiz-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--fg-muted);
}

.quiz-hint {
  font-size: 13px;
  color: var(--fg2);
  margin-bottom: 24px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.quiz-prompt {
  font-size: 26px;
  font-weight: 800;
  font-family: var(--display);
  margin-bottom: 32px;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.key-input-area {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.key-input-area input {
  background: rgba(0, 0, 0, 0.20);
  border: 2px solid var(--border);
  color: var(--yellow);
  padding: 14px 20px;
  border-radius: var(--radius);
  font-size: 20px;
  font-family: var(--font);
  text-align: center;
  width: 280px;
  outline: none;
  letter-spacing: 1px;
  transition: all var(--transition);
}

.key-input-area input:focus {
  border-color: var(--fg3);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.key-input-area input.correct-input {
  border-color: var(--green);
  background: rgba(16, 185, 129, 0.05);
}

.key-input-area input.wrong-input {
  border-color: var(--red);
  background: rgba(239, 68, 68, 0.05);
}

.submit-btn {
  background: linear-gradient(135deg, var(--blue), #2563eb);
  color: #fff;
  border: none;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--sans);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.3);
}

.submit-btn:disabled {
  opacity: .4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.choices-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.choices-grid button {
  background: var(--bg3);
  color: var(--fg);
  border: 2px solid var(--border);
  padding: 16px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: .5px;
}

.choices-grid button:hover:not(:disabled) {
  border-color: var(--border-hover);
  background: var(--bg4);
  transform: translateY(-1px);
}

.choices-grid button.correct-choice {
  border-color: var(--green);
  background: rgba(16, 185, 129, 0.15);
  color: #fff;
  font-weight: 700;
}

.choices-grid button.wrong-choice {
  border-color: var(--red);
  background: rgba(239, 68, 68, 0.15);
  color: #fff;
}

.choices-grid button:disabled {
  cursor: not-allowed;
  opacity: .8;
}

.result-feedback {
  margin-top: 20px;
  font-size: 15px;
  min-height: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.result-feedback .answer {
  color: var(--yellow);
  font-family: var(--font);
  font-size: 18px;
  font-weight: 700;
}

.result-feedback .tip {
  color: var(--fg-muted);
  font-size: 13px;
  font-style: italic;
  max-width: 80%;
  line-height: 1.5;
}

.next-btn {
  margin-top: 16px;
  background: linear-gradient(135deg, var(--fg3), var(--purple));
  color: #fff;
  border: none;
  padding: 12px 36px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--sans);
  transition: all var(--transition);
  display: none;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.next-btn.visible {
  display: inline-block;
}

.next-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
}

.quiz-summary {
  margin-top: 28px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.quiz-stat {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  text-align: center;
  min-width: 110px;
  box-shadow: var(--shadow);
}

.quiz-stat .num {
  font-size: 28px;
  font-weight: 800;
  font-family: var(--display);
  color: var(--fg);
}

.quiz-stat .num.green { color: var(--green); }
.quiz-stat .num.red { color: var(--red); }
.quiz-stat .label {
  font-size: 11px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

/* Stats styling */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.12);
}

.stat-card .value {
  font-size: 38px;
  font-weight: 800;
  font-family: var(--display);
  margin-bottom: 6px;
}

.stat-card .value.green { color: var(--green); }
.stat-card .value.blue { color: var(--blue); }
.stat-card .value.yellow { color: var(--yellow); }
.stat-card .value.purple { color: var(--purple); }

.stat-card .label {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-muted);
}

.category-progress {
  margin-bottom: 32px;
  background: var(--bg2);
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.category-progress h3 {
  font-size: 14px;
  font-family: var(--display);
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--fg2);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.cat-prog-item {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.cat-prog-item:last-child {
  margin-bottom: 0;
}

.cat-prog-item .cat-name {
  width: 90px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  text-align: right;
}

.cat-prog-bar {
  flex: 1;
  height: 10px;
  background: rgba(0,0,0,0.20);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.cat-prog-fill {
  height: 100%;
  border-radius: 20px;
  transition: width .8s cubic-bezier(0.4, 0, 0.2, 1);
}

.cat-prog-fill.s0 { background: rgba(255,255,255,0.05); }
.cat-prog-fill.s1 { background: linear-gradient(90deg, var(--red), #f87171); }
.cat-prog-fill.s2 { background: linear-gradient(90deg, var(--orange), #fb923c); }
.cat-prog-fill.s3 { background: linear-gradient(90deg, var(--yellow), #fbbf24); }
.cat-prog-fill.s4 { background: linear-gradient(90deg, #047857, var(--green)); }
.cat-prog-fill.s5 { background: linear-gradient(90deg, var(--green), #34d399); }

.cat-prog-item .cat-pct {
  font-size: 13px;
  color: var(--fg-muted);
  width: 42px;
  font-family: var(--font);
  font-weight: 600;
}

.recent-history {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.recent-history h3 {
  font-size: 14px;
  font-family: var(--display);
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--fg2);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.history-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.history-row:last-child {
  border-bottom: none;
}

.history-row .date {
  color: var(--fg-muted);
}

.history-row .result {
  font-family: var(--font);
  font-weight: 600;
}

.reset-btn {
  margin-top: 20px;
  background: transparent;
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.4);
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--sans);
  transition: all var(--transition);
}

.reset-btn:hover {
  background: var(--red);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

/* Cheatsheet styling */
.cheatsheet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 20px;
}

.cheatsheet-category-card {
  background: var(--bg2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.cheatsheet-category-card h3 {
  font-size: 16px;
  font-family: var(--display);
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--fg2);
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}

.cheatsheet-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cheatsheet-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  font-size: 14px;
  gap: 16px;
}

.cheatsheet-row:last-child {
  border-bottom: none;
}

.cheatsheet-keys {
  font-family: var(--font);
  font-weight: 600;
  color: var(--yellow);
  background: rgba(0, 0, 0, 0.2);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}

.cheatsheet-keys:hover {
  background: var(--bg3);
  border-color: var(--border-hover);
  color: #fff;
}

.cheatsheet-desc {
  color: var(--fg);
  text-align: right;
  font-weight: 500;
}

/* Toast styling */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg3);
  border: 1px solid var(--border-hover);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 8px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

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

.section {
  display: none;
}

.section.visible {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media(max-width:640px){
  header { padding: 12px 16px; }
  nav { width: 100%; justify-content: center; }
  nav button { padding: 8px 12px; font-size: 13px; flex: 1; justify-content: center; }
  main { padding: 20px 16px 60px; }
  .card-grid { grid-template-columns: 1fr; }
  .cheatsheet-grid { grid-template-columns: 1fr; }
  .choices-grid { grid-template-columns: 1fr; }
  .quiz-prompt { font-size: 20px; }
  .key-input-area input { width: 180px; font-size: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .toolbar { flex-direction: column; align-items: stretch; gap: 10px; }
  .search-box { width: 100%; }
  .filter-group { justify-content: center; }
  .cat-tabs { justify-content: center; }
}

/* Print Styles */
@media print {
  body {
    background: #fff !important;
    background-image: none !important;
    color: #000 !important;
  }
  header, .toolbar, nav, .reset-btn {
    display: none !important;
  }
  main {
    max-width: 100% !important;
    padding: 0 !important;
  }
  .section {
    display: none !important;
  }
  #section-cheatsheet {
    display: block !important;
  }
  .cheatsheet-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 15px !important;
  }
  .cheatsheet-category-card {
    background: #fff !important;
    color: #000 !important;
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    padding: 15px !important;
  }
  .cheatsheet-category-card h3 {
    color: #000 !important;
    border-bottom: 1px solid #000 !important;
  }
  .cheatsheet-keys {
    background: #eee !important;
    color: #000 !important;
    border: 1px solid #bbb !important;
  }
  .cheatsheet-desc {
    color: #000 !important;
  }
}