/* CSS Variables */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --accent: #cf1a37;
  --accent-dim: #a01528;
  --text-primary: #ffffff;
  --text-secondary: #aaaaaa;
  --border: #333333;
}

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

/* Body */
body {
  font-family: Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: 0;
  min-height: 100vh;
}

/* Top Banner */
.top-banner {
  background: var(--accent);
  padding: 0 20px;
  height: 48px;
  display: flex;
  align-items: center;
  gap: 15px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.back-button {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5em;
  cursor: pointer;
  padding: 5px 10px;
  display: flex;
  align-items: center;
  transition: transform 0.2s;
  text-decoration: none;
  line-height: 1;
}

.back-button:hover {
  transform: translateX(-3px);
}

.banner-title {
  font-size: 1.1em;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-primary);
  line-height: 1;
}

/* Container */
.container {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 20px;
}

/* Common Controls */
button, select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 10px 15px;
  border-radius: 4px;
  cursor: pointer;
  font-family: Arial, sans-serif;
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.2s;
}

button:hover, select:hover {
  border-color: #4a4a4a;
}

button:active {
  background: var(--accent);
}

/* Section Styles */
.section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px;
  margin-bottom: 20px;
}

.section-title {
  font-size: 0.85em;
  font-weight: bold;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.collapse-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1em;
  padding: 0 5px;
}

.collapse-toggle:hover {
  color: var(--accent);
}

/* Dizi-specific styles */
/* Additional Dizi-specific styles */
.control {
  margin-bottom: 15px;
}
.control label {
  display: inline-block;
  width: 150px;
  color: var(--text-secondary);
  font-size: 0.9em;
}
.control input[type="range"] {
  width: 200px;
  vertical-align: middle;
}
.control .value {
  display: inline-block;
  width: 80px;
  text-align: right;
  color: var(--accent);
  font-weight: bold;
  font-size: 0.9em;
}
.control-button {
  padding: 8px 15px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.9em;
  transition: background 0.2s;
}
.control-button:hover {
  background: var(--accent-dim);
}
.control-button.active {
  background: var(--accent);
  border-color: var(--accent);
}
.hint {
  font-size: 0.75em;
  color: #666;
  font-style: italic;
}
.section-subtitle {
  font-size: 0.85em;
  color: var(--text-secondary);
  margin-bottom: 15px;
  font-style: italic;
}

/* Keyboard Styles */
.keyboard-container {
  display: none;
  background: var(--bg-primary);
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.keyboard-container:hover {
  border-color: #4a4a4a;
}

.keyboard-container.visible {
  display: block;
}

.keyboard-container:fullscreen {
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  border-radius: 0;
  width: 100vw;
  height: 100vh;
  min-height: 0;
}

.keyboard-container:fullscreen .keyboard-with-bend {
  height: 70vh;
}

.keyboard-container:fullscreen .piano-keyboard {
  height: 100%;
  width: auto;
}

.keyboard-container:fullscreen::after {
  content: '✕';
  display: block;
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 20px;
  color: var(--text-primary);
  opacity: 0.6;
  transition: opacity 0.2s, color 0.2s;
  pointer-events: auto;
  background: rgba(207, 26, 55, 0.8);
  width: 32px;
  height: 32px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1000;
  font-weight: bold;
}

.keyboard-container:fullscreen::after:hover {
  opacity: 1;
  background: rgba(207, 26, 55, 1);
}

.keyboard-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  align-items: center;
}

.keyboard-controls label {
  color: #888;
  font-size: 11px;
  text-transform: uppercase;
}

.keyboard-controls select {
  flex: 1;
  min-width: 0;
}

.octave-controls {
  display: flex;
  gap: 5px;
  align-items: center;
}

.octave-btn {
  padding: 8px 15px;
  background: var(--bg-tertiary);
  border: 1px solid #3a3a3a;
  border-radius: 4px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 14px;
  font-weight: bold;
}

.octave-btn:hover {
  border-color: #4a4a4a;
}

.octave-btn:active {
  background: #0066FF;
}

.keyboard-with-bend {
  display: flex;
  gap: 15px;
  height: 400px;
}

.pitch-bend-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.piano-keyboard {
  display: flex;
  flex: 1;
  height: 100%;
  background: var(--bg-secondary);
  border-radius: 4px;
  padding: 10px;
  overflow: hidden;
  justify-content: center;
  align-items: stretch;
}

.keyboard-info {
  margin-top: 10px;
  font-size: 10px;
  color: #666;
  display: flex;
  justify-content: space-between;
  align-items: center;
}