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

body {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: transparent;
  min-height: 100vh;
  overflow-x: hidden;
}

.selector-shell {
  background: #fff;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .12);
}

.selector-title {
  font-weight: 800;
  color: #263238;
  margin-bottom: 10px;
}

.thumb-card {
  position: relative;
  border: 2px solid #e6e9ef;
  border-radius: 10px;
  padding: 10px;
  cursor: pointer;
  background: #fff;
  transition: .2s;
}

.thumb-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(66, 133, 244, .12);
  border-color: #82a9ff;
}

.thumb-card.selected {
  border-color: #34a853;
  background: linear-gradient(135deg, #f6fff6 0%, #eaf7ea 100%);
}

.thumb-img {
  width: 100%;
  height: 140px;
  max-height: 210px;
  border-radius: 6px;
  object-fit: contain;
  background: #eef2f7;
  display: block;
}

.thumb-caption {
  margin-top: 8px;
  font-size: .95em;
  color: #37474f;
  font-weight: 600;
}

.thumb-small {
  font-size: .82em;
  color: #78909c;
}

.task-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.7em;
  font-weight: 700;
}

.scenario-info {
  flex: 1;
  min-width: 260px;
  padding: 12px;
  border: 2px solid #ff9800;
  border-radius: 10px;
  background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
  color: #7b4a00;
  font-size: .95em;
}

.start-btn {
  background: linear-gradient(135deg, #4285f4, #34a853) !important;
  color: #fff !important;
  border: none !important;
  border-radius: 24px !important;
  padding: 12px 22px !important;
  font-weight: 800 !important;
  cursor: pointer !important;
  box-shadow: 0 6px 18px rgba(66, 133, 244, .3) !important;
  min-width: 180px !important;
}

.start-btn:disabled {
  background: #c9cdd7 !important;
  box-shadow: none !important;
  cursor: not-allowed !important;
}

.nav-btn {
  background: #4285f4;
  color: #fff !important;
  border: none;
  border-radius: 12px;
  padding: 6px 10px;
  margin-left: 6px;
  cursor: pointer;
}

.demo-shell {
  display: none;
  margin-top: 18px;
  background: #fff;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .12);
}

.demo-shell.visible {
  display: block;
}

.panel-card {
  background: #fff;
  border: 2px solid #e8eaed;
  border-radius: 12px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  min-height: 170px;
}

.section-header {
  background: linear-gradient(135deg, #34a853, #4285f4);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  text-align: center;
  font-weight: 700;
  margin-bottom: 10px;
  font-size: .9em;
}

.results-section .section-header {
  background: linear-gradient(135deg, #ea4335, #fbbc04);
}

.results-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f8f9fa;
  border-radius: 8px;
  padding: 8px;
}

#birdEyeVideo,
#finalVideo {
  width: 100%;
  max-height: 190px;
  object-fit: contain;
  border-radius: 6px;
}

.final-status-display {
  padding: 6px 12px;
  border-radius: 14px;
  font-weight: 550;
  display: inline-block;
}

.final-status-display.success {
  background: #34a853;
  color: #fff;
}

#modelSelector {
  padding: 6px 12px;
  border: 2px solid #e9ecef;
  border-radius: 8px;
  background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
  font-size: 0.85em;
  font-weight: 600;
  color: #495057;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 120px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  margin-left: 8px;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: none;
  position: relative;
  padding-right: 24px;
}

#modelSelector::after {
  content: '▼';
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 12px;
  color: #666;
  font-size: 12px;
}

#modelSelector:hover {
  border-color: #4285f4;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(66, 133, 244, 0.15);
}

#modelSelector:focus {
  outline: none;
  border-color: #4285f4;
  box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.2);
}

.iteration-display {
  background: #fff;
  border: 2px solid #e8eaed;
  border-radius: 12px;
  padding: 14px;
}

.iteration-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #4285f4, #34a853);
  color: #fff !important;
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 12px;
}

.sequence-indicator {
  text-align: center;
  margin-bottom: 12px;
  padding: 8px;
  background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
  border-radius: 10px;
  color: #fff;
}

.sequence-flow {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.sequence-step {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, .18);
  padding: 5px 10px;
  border-radius: 16px;
}

.sequence-step.active {
  background: rgba(255, 255, 255, .32);
}

.flow-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  color: #1f2937;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: .8em;
}

.step-card {
  border: 2px solid #e8eaed;
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}

.step-card.active {
  border-color: #4285f4;
}

.step-h {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  margin-bottom: 6px;
}

.step-title {
  font-weight: 800;
}

.step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #e3f2fd;
  color: #1565c0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: .8em;
}

.obs-box {
  background: #f4f6f8;
  border-radius: 6px;
  padding: 6px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.obs-img {
  max-height: 100%;
  width: auto;
  object-fit: contain;
  border-radius: 4px;
  display: block;
}

.plan-box {
  border: 1px dashed #cfd8dc;
  border-radius: 6px;
  padding: 8px;
}

.plan-box li {
  font-size: .75em;
}

.success-explain {
  display: inline-block;
  margin: 12px auto;
  padding: 12px 16px;
  background: #e8f5e9;
  border: 1px solid #c6e6c9;
  border-radius: 6px;
  text-align: center;
}

.topline {
  color: #3b3f47;
  font-size: .9em;
}

.conf-bar {
  width: 100%;
  height: 6px;
  background: #eee;
  border-radius: 4px;
  margin-top: 4px;
  overflow: hidden;
}

.conf-fill {
  height: 100%;
  background: linear-gradient(90deg, #ea4335, #fbbc04, #34a853);
}

.select-wrap {
  position: relative;
  display: inline-block;
}

.select-wrap select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 28px;       
  background: linear-gradient(135deg,#fff 0%,#f8f9fa 100%);
  border: 2px solid #e9ecef;
  border-radius: 8px;
  font-size: 0.85em;
  font-weight: 600;
  color: #495057;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0,0,0,.05);
}

.select-wrap::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid #666;  
  pointer-events: none;
}

.select-wrap select:hover {
  border-color: #4285f4;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(66,133,244,.15);
}

.select-wrap select:focus {
  outline: none;
  border-color: #4285f4;
  box-shadow: 0 0 0 3px rgba(66,133,244,.2);
}