.random-number-tool {
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  gap: var(--spacing-xl);}
.random-display {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}
.random-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  min-height: 150px;
  width: 100%;
}
.random-box {
  width: clamp(80px, 20vw, 120px);
  height: clamp(80px, 20vw, 120px);
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(10px);
}
.random-box.generating {
  animation: randomShake 0.5s ease-in-out;
}
.random-box.single {
  width: clamp(120px, 30vw, 180px);
  height: clamp(120px, 30vw, 180px);
}
@keyframes randomShake {
  0%,
  100% {
    transform: rotate(0deg) scale(1);
  }
  10% {
    transform: rotate(-5deg) scale(1.05);
  }
  20% {
    transform: rotate(5deg) scale(1.05);
  }
  30% {
    transform: rotate(-5deg) scale(1.05);
  }
  40% {
    transform: rotate(5deg) scale(1.05);
  }
  50% {
    transform: rotate(-5deg) scale(1.05);
  }
  60% {
    transform: rotate(5deg) scale(1.05);
  }
  70% {
    transform: rotate(-5deg) scale(1.05);
  }
  80% {
    transform: rotate(5deg) scale(1.05);
  }
  90% {
    transform: rotate(-2deg) scale(1.02);
  }
}
.random-number {
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}
.random-box.single .random-number {
  font-size: clamp(3rem, 12vw, 5rem);
}
.random-total {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 600;
  color: var(--text-primary);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.5s forwards;
}
#totalValue {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-left: 0.5rem;
}
.random-generate-btn {
  width: 100%;
  max-width: 300px;
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: var(--transition);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.random-generate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.3);
}
.random-generate-btn:active {
  transform: translateY(0);
}
.random-generate-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.random-generate-btn svg {
  pointer-events: none;
}
.random-history {
  width: 100%;
  max-height: 200px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.random-history .history-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}
.range-inputs {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
}
.range-input-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.range-input-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.range-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
  font-family: inherit;
}
.range-input:focus {
  outline: none;
  border-color: rgba(102, 126, 234, 0.6);
  background: rgba(255, 255, 255, 0.1);
}
.range-separator {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 18px;
}
.quick-select {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}
.quick-btn {
  flex: 1;
  min-width: 70px;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.quick-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}
.quick-btn:active {
  transform: scale(0.95);
}
.filter-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xs);
}
.filter-btn {
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}
.filter-btn.active {
  background: rgba(102, 126, 234, 0.3);
  border-color: rgba(102, 126, 234, 0.6);
}
.random-notification {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: var(--gradient-primary);
  color: var(--text-primary);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  z-index: 10000;
  opacity: 0;
  transition: all 0.3s ease-out;
  pointer-events: none;
  white-space: nowrap;
}
.random-notification.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
@media (max-width: 640px) {
  .random-number-tool {
    padding: var(--spacing-lg);
  }
  .random-container {
    min-height: 120px;
  }
  .random-history {
    max-height: 150px;
  }
  .filter-buttons {
    grid-template-columns: 1fr;
  }
}
@media (min-width: 1024px) {
  .random-number-tool {
    max-width: 700px;
  }
  .random-history {
    max-height: 250px;
  }
}