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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  min-height: 100vh;
  color: #fff;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 30px 0;
}

header h1 {
  font-size: 28px;
  margin-bottom: 8px;
}

.subtitle {
  color: #8892b0;
  font-size: 14px;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.category-select {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.category-select label {
  font-size: 14px;
  color: #8892b0;
}

.category-select select {
  padding: 12px 16px;
  font-size: 16px;
  border: 2px solid #2d3748;
  border-radius: 12px;
  background: #1a1a2e;
  color: #fff;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}

.category-select select:focus {
  border-color: #6366f1;
}

.generate-btn {
  padding: 16px 32px;
  font-size: 18px;
  font-weight: 600;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: #fff;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.generate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.generate-btn:active {
  transform: translateY(0);
}

.generate-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.idea-box {
  background: #2d3748;
  border-radius: 12px;
  padding: 24px;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.idea-box.hidden {
  display: none;
}

#idea-text {
  font-size: 16px;
  line-height: 1.6;
}

.actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.actions.hidden {
  display: none;
}

.action-btn {
  padding: 12px 20px;
  font-size: 16px;
  background: #2d3748;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

.action-btn:hover {
  background: #3d4758;
}

.action-btn.like:hover {
  background: #22c55e;
}

.action-btn.dislike:hover {
  background: #ef4444;
}

.stats {
  text-align: center;
  padding: 16px;
  color: #8892b0;
  font-size: 14px;
}

.history-section {
  background: rgba(45, 55, 72, 0.5);
  border-radius: 12px;
  padding: 16px;
  margin-top: 20px;
}

.history-section h3 {
  font-size: 14px;
  color: #8892b0;
  margin-bottom: 12px;
}

#history-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#history-list li {
  font-size: 13px;
  line-height: 1.4;
  color: #cbd5e0;
  padding-bottom: 8px;
  border-bottom: 1px solid #4a5568;
}

#history-list li:last-child {
  border-bottom: none;
}

#history-list small {
  color: #6366f1;
  font-weight: 600;
  text-transform: uppercase;
}

.hidden {
  display: none !important;
}

footer {
  text-align: center;
  padding: 20px 0;
  color: #4a5568;
  font-size: 12px;
}

/* Loading animation */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.loading {
  animation: pulse 1.5s infinite;
}