:root {
  --primary-color: #2563eb;
  --secondary-color: #1d4ed8;
  --background-color: #f8fafc;
  --text-color: #1e293b;
  --border-color: #e2e8f0;
  --success-color: #059669;
  --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --card-border: 1px solid var(--border-color);
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 4rem;
  padding: 3rem 0;
  background: linear-gradient(to right, #2563eb11, #2563eb22);
  border-radius: 1rem;
}

header h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
  font-weight: 800;
  letter-spacing: -0.025em;
}

header p {
  font-size: 1.25rem;
  color: var(--text-color);
  opacity: 0.9;
}

.upload-section {
  background: white;
  border: 2px dashed var(--border-color);
  border-radius: 1rem;
  padding: 3rem 2rem;
  text-align: center;
  margin-bottom: 3rem;
  transition: all 0.3s ease;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.upload-section:hover {
  border-color: var(--primary-color);
  background: #2563eb05;
}

.upload-buttons {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: 0.75rem;
  background: white;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 180px;
}

.button:hover {
  border-color: var(--primary-color);
  background: var(--background-color);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
}

.button svg {
  color: var(--primary-color);
  transition: transform 0.2s ease;
}

.button:hover svg {
  transform: scale(1.1);
}

.button span {
  font-weight: 500;
  font-size: 1.1rem;
}

.upload-hint {
  color: var(--text-color);
  opacity: 0.7;
  font-size: 1rem;
}

.analysis-container {
  contain: content;
  transform: translateZ(0);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  background: white;
  border-radius: 1.5rem;
  padding: 2.5rem;
  box-shadow: var(--card-shadow);
  min-height: 700px;
  border: var(--card-border);
}

.preview-section {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f8fafc;
  border-radius: 1rem;
  border: var(--card-border);
  overflow: hidden;
  contain: strict;
  transform: translateZ(0);
}

.preview-section img {
  position: absolute;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 0.5rem;
}

.results-section {
  padding: 1rem;
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

#results h2 {
  font-size: 1.8rem;
  margin-bottom: 2rem;
  color: var(--primary-color);
  font-weight: 700;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1rem;
}

#analysisContent {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-height: 600px;
  overflow-y: auto;
  padding-right: 1rem;
}

.analysis-item {
  background: var(--background-color);
  padding: 1.5rem;
  border-radius: 1rem;
  border-left: 4px solid var(--primary-color);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.analysis-item h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.4rem;
  font-weight: 600;
}

.analysis-item h4 {
  margin: 1rem 0 0.5rem 0;
  color: var(--text-color);
  font-size: 1.1rem;
}

.analysis-item ul {
  list-style-type: none;
  margin-left: 0.5rem;
}

.analysis-item ul li {
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.5rem;
}

.analysis-item ul li:before {
  content: "•";
  color: var(--primary-color);
  font-weight: bold;
  position: absolute;
  left: 0;
}

.analysis-item strong {
  color: var(--primary-color);
  font-weight: 600;
}

.rating {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--primary-color)10;
  border-radius: 0.5rem;
  text-align: center;
}

.subject-overlay,
.subject-overlay-polygon {
  position: absolute;
  border: 2px solid;
  pointer-events: none;
  will-change: transform;
  backface-visibility: hidden;
  transform-origin: center;
}

.subject-label {
  position: absolute;
  top: -25px;
  left: -2px;
  padding: 2px 6px;
  border-radius: 4px;
  color: white;
  font-size: 12px;
  white-space: nowrap;
  transform: translateY(-100%);
  z-index: 1;
}

#overlayContainer {
  pointer-events: none;
  z-index: 2;
  contain: strict;
  transform: translateZ(0);
}

#imagePreview {
  z-index: 1;
  contain: strict;
  transform: translateZ(0);
}

@media (max-width: 1200px) {
  .container {
    padding: 1rem;
  }
  
  .analysis-container {
    gap: 2rem;
    padding: 1.5rem;
  }
}

@media (max-width: 768px) {
  .analysis-container {
    grid-template-columns: 1fr;
  }
  
  .preview-section {
    min-height: 400px;
  }
  
  .upload-buttons {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .button {
    width: 100%;
    max-width: 300px;
  }
}

/* Custom scrollbar */
#analysisContent::-webkit-scrollbar {
  width: 8px;
}

#analysisContent::-webkit-scrollbar-track {
  background: var(--background-color);
  border-radius: 4px;
}

#analysisContent::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

#analysisContent::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}