body {
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  background: #f2f2f2;
  font-family: Arial, sans-serif;
}

#header-banner,
#page-container {
  width: min(1100px, calc(100% - 40px));
  margin-left: auto;
  margin-right: auto;
}

#header-banner {
  margin: 32px auto 16px;
  border-radius: 16px;
}

#page-container {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  padding-bottom: 32px;
  margin: 0 auto 40px;
}

svg {
  width: 100%;
  border: 1px solid #ccc;
  font-family: Arial, sans-serif;
}

.axis path,
.axis line {
  stroke: #000;
}

.degree {
  font-size: 12px;
  text-anchor: middle;
}

.degree-label {
  font-size: 12px;
  text-anchor: middle;
  opacity: 0.7;
}

#audio-controls {
  margin: 15px;
}

.selector-upload-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

#pair-selector {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  background: none;
  border: none;
  font-size: 0.95rem;
}

#pair-selector select {
  display: inline-block;
  min-width: 220px;
  padding: 6px 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.95rem;
  background-color: #fff;
}

#uploadForm {
  display: flex;
  align-items: center;
  gap: 8px;
}

#uploadForm .btn-upload {
  background: #ccc;
  color: #333;
  border: 1px solid #999;
  padding: 6px 12px;
  font-size: 0.9em;
  cursor: pointer;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

#uploadForm .btn-upload.disabled,
#uploadForm .btn-upload[aria-disabled="true"] {
  background: #e0e0e0;
  color: #888;
  border-color: #d0d0d0;
  cursor: not-allowed;
}

#uploadForm .btn-upload.disabled:hover,
#uploadForm .btn-upload[aria-disabled="true"]:hover {
  background: #e0e0e0;
}

#uploadForm .btn-upload:hover {
  background: #bbb;
}

.file-info {
  margin: 0;
  font-style: italic;
  font-size: 0.9em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.upload-container {
  border: 2px dashed #ccc;
  padding: 20px;
  text-align: center;
  margin: 15px;
  border-radius: 5px;
}

.upload-container:hover {
  border-color: #aaa;
}

.file-input {
  display: none;
}

.upload-btn {
  background-color: #4CAF50;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
}

.upload-btn:hover {
  background-color: #45a049;
}

.message {
  padding: 10px;
  margin: 15px;
  border-radius: 4px;
}

.success {
  background-color: #d4edda;
  color: #155724;
}

.error {
  background-color: #f8d7da;
  color: #721c24;
}

#loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 9999;
}

#loading-message {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  padding: 20px;
  border-radius: 5px;
  text-align: center;
}

.spinner {
  border: 5px solid #f3f3f3;
  border-top: 5px solid #3498db;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 2s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

#player-controls-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

rect.timeline-segment {
  cursor: pointer;
}