:root {
  --bg-color: #f0f4f8;
  --container-bg: white;
  --text-color: #333;
  --label-color: #555;
  --settings-bg: #f9f9f9;
  --input-border: #ccc;
  --btn-bg: #4CAF50;
  --btn-hover: #45a049;
  --shadow: rgba(0,0,0,0.1);
  --ball-shadow: rgba(0,0,0,0.3);
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --container-bg: #2d2d2d;
  --text-color: #e0e0e0;
  --label-color: #b0b0b0;
  --settings-bg: #3d3d3d;
  --input-border: #555;
  --btn-bg: #388E3C;
  --btn-hover: #2E7D32;
  --shadow: rgba(0,0,0,0.4);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}

.container {
  background-color: var(--container-bg);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 10px 25px var(--shadow);
  text-align: center;
  max-width: 600px;
  width: 90%;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

h1 {
  margin: 0;
  font-size: 24px;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--input-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background-color 0.3s;
}

.theme-toggle:hover {
  background-color: var(--settings-bg);
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-bottom: 20px;
}

.nav-link {
  font-size: 12px;
  text-decoration: none;
  color: var(--label-color);
  padding: 6px 12px;
  border-radius: 20px;
  background-color: var(--settings-bg);
  border: 1px solid var(--input-border);
  transition: all 0.3s;
}

.nav-link:hover {
  background-color: var(--input-border);
  color: var(--text-color);
}

.nav-link.active {
  background-color: #2196F3;
  color: white;
  border-color: #2196F3;
  font-weight: bold;
}

.main-content {
  padding: 20px 0;
}

.subtitle {
  color: var(--label-color);
  margin-bottom: 20px;
}

/* Upload UI */
.upload-box {
  border: 2px dashed var(--input-border);
  border-radius: 12px;
  padding: 40px;
  cursor: pointer;
  transition: all 0.3s;
  background-color: var(--settings-bg);
}

.upload-box:hover {
  border-color: #2196F3;
  background-color: rgba(33, 150, 243, 0.05);
}

.upload-icon {
  font-size: 50px;
  display: block;
  margin-bottom: 15px;
}

#preview-image {
  max-width: 100%;
  max-height: 300px;
  border-radius: 12px;
  margin-bottom: 20px;
  box-shadow: 0 4px 10px var(--shadow);
}

/* Result Bars */
.label-container {
  margin-top: 20px;
  text-align: left;
}

.result-bar-item {
  margin-bottom: 15px;
}

.label-name {
  font-weight: bold;
  font-size: 14px;
  margin-bottom: 5px;
}

.progress-container {
  height: 25px;
  background-color: var(--settings-bg);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #4caf50, #81c784);
  transition: width 0.5s ease-out;
}

.progress-text {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: bold;
}

.retry-btn {
  margin-top: 20px;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  background-color: var(--label-color);
  color: white;
  cursor: pointer;
}

.spinner {
  margin: 20px 0;
  font-weight: bold;
  color: #2196F3;
}

/* Contact Form Styles */
.contact-section {
  margin-top: 40px;
  text-align: left;
}

.separator {
  border: 0;
  height: 1px;
  background: var(--input-border);
  margin-bottom: 30px;
}

.contact-section h2 {
  font-size: 20px;
  margin-bottom: 20px;
  text-align: center;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-weight: bold;
  font-size: 14px;
  color: var(--label-color);
}

.form-group input, 
.form-group textarea {
  padding: 12px;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  background-color: var(--container-bg);
  color: var(--text-color);
  font-family: inherit;
  font-size: 14px;
}

.form-group textarea {
  resize: vertical;
}

.submit-btn {
  background-color: #2196F3;
  color: white;
  padding: 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  transition: background-color 0.3s;
  margin-top: 5px;
}

.submit-btn:hover {
  background-color: #1976D2;
}

[data-theme="dark"] .submit-btn {
  background-color: #1976D2;
}

[data-theme="dark"] .submit-btn:hover {
  background-color: #1565C0;
}

/* Comments Section Styles */
.comments-section {
  margin-top: 40px;
  text-align: left;
}