/* MuscleMap Styles */

:root {
  /* Color palette - professional medical/scientific theme */
  --color-bg: #0f1419;
  --color-surface: #1a2332;
  --color-surface-elevated: #232f42;
  --color-border: #2d3f5a;
  --color-border-light: #3d5275;

  --color-text: #e8edf4;
  --color-text-muted: #8b99ad;
  --color-text-dim: #5c6b7f;

  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-glow: rgba(59, 130, 246, 0.25);

  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);

  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);

  --color-error: #ef4444;
  --color-error-bg: rgba(239, 68, 68, 0.1);

  --color-accent: #8b5cf6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px var(--color-primary-glow);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

/* Layout */
.app-container {
  display: grid;
  grid-template-columns: 320px 1fr;
  grid-template-rows: auto 1fr auto;
  height: 100vh;
  max-height: 100vh;
  gap: 0;
  overflow: hidden;
}

/* Header */
.app-header {
  grid-column: 1 / -1;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon img {
  display: block;
}

.logo h1 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--color-text-muted);
  font-weight: 400;
  font-size: 0.85rem;
  margin-left: var(--space-xs);
}

.logo .version {
  font-size: 0.7rem;
  opacity: 0.6;
  margin-left: var(--space-xs);
}

/* Sidebar */
.app-sidebar {
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Scrollable sections area */
.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

/* Fixed status bar at bottom of sidebar */
.sidebar-status {
  flex-shrink: 0;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface-elevated);
  border-top: 1px solid var(--color-border);
}

.status-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.status-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.status-value {
  font-size: 0.7rem;
  color: var(--color-text);
  font-weight: 500;
}

.status-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-status-cancel {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0;
  pointer-events: none;
}

.btn-status-cancel:not(:disabled) {
  opacity: 1;
  pointer-events: auto;
  border-color: var(--color-error);
  color: var(--color-error);
}

.btn-status-cancel:not(:disabled):hover {
  background: var(--color-error);
  color: white;
}

/* Sidebar Sections */
.sidebar-section {
  border-bottom: 1px solid var(--color-border);
}

.sidebar-section:last-child {
  border-bottom: none;
}

.section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  padding: var(--space-md);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.section-title:hover {
  background: var(--color-surface-elevated);
  color: var(--color-text);
}

.section-title svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* Collapse chevron indicator */
.section-title::after {
  content: '';
  margin-left: auto;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--transition-fast);
}

.sidebar-section.collapsed .section-title::after {
  transform: rotate(-90deg);
}

/* Section content wrapper */
.section-content {
  padding: 0 var(--space-md) var(--space-md);
  overflow: hidden;
  transition: max-height 0.25s ease-out, padding 0.25s ease-out, opacity 0.2s ease-out;
  max-height: 1000px;
  opacity: 1;
}

.sidebar-section.collapsed .section-content {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}

/* Input Mode Tabs */
.input-mode-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: var(--space-sm);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 2px;
  border: 1px solid var(--color-border);
}

.input-mode-tab {
  flex: 1;
  padding: 5px 4px;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: calc(var(--radius-sm) - 2px);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.input-mode-tab:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

.input-mode-tab.active {
  color: var(--color-text);
  background: var(--color-primary);
  font-weight: 600;
}

/* Input mode content visibility */
.input-mode-content {
  display: none;
}

.input-mode-content.active {
  display: block;
}

/* File Upload */
.file-upload-group {
  margin-bottom: var(--space-sm);
}

.file-upload-group:last-child {
  margin-bottom: 0;
}

.file-upload-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
}

.file-upload-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text);
}

.file-upload-label .count {
  color: var(--color-text-muted);
  font-weight: 400;
}

.file-upload-zone {
  position: relative;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.file-upload-zone:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-glow);
}

.file-upload-zone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-glow);
  border-style: solid;
}

.file-upload-zone.has-files {
  border-color: var(--color-success);
  border-style: solid;
  background: var(--color-success-bg);
}

.file-upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.file-upload-zone:hover .upload-icon {
  color: var(--color-primary);
}

.upload-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.upload-text strong {
  color: var(--color-primary);
}

/* File List */
.file-list {
  margin-top: var(--space-xs);
  max-height: 60px;
  overflow-y: auto;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface-elevated);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-xs);
  font-size: 0.75rem;
}

.file-item:last-child {
  margin-bottom: 0;
}

.file-name {
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.file-remove {
  background: none;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
  padding: 2px;
  display: flex;
  transition: color var(--transition-fast);
}

.file-remove:hover {
  color: var(--color-error);
}

.file-remove svg {
  width: 14px;
  height: 14px;
}

/* Parameters */
.param-group {
  margin-bottom: var(--space-sm);
}

.param-group:last-child {
  margin-bottom: 0;
}

.param-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 2px;
}

.info-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--color-text-muted);
  color: var(--color-text-muted);
  font-size: 9px;
  font-weight: 700;
  font-style: normal;
  cursor: help;
  flex-shrink: 0;
}

.info-icon .info-tooltip {
  display: none;
  position: fixed;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text);
  white-space: normal;
  width: 200px;
  line-height: 1.4;
  z-index: 10000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}

/* Inputs */
input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b99ad' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-glow);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-danger {
  background: #dc2626;
  color: white;
  padding: var(--space-sm) var(--space-md);
}

.btn-danger:hover:not(:disabled) {
  background: #b91c1c;
}

.btn-danger:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-surface-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-border);
  border-color: var(--color-border-light);
}

.btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  padding: 2px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}

.btn-icon:hover:not(:disabled) {
  color: var(--color-primary);
  background: var(--color-surface-elevated);
}

.btn-icon:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn svg {
  width: 16px;
  height: 16px;
}

.run-button-group {
  display: flex;
  gap: var(--space-sm);
}

.run-button-group .btn-primary {
  flex: 1;
}

.run-button-group .btn-danger {
  flex: 0 0 auto;
}

/* Checkbox Labels */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--color-text);
}

.checkbox-label input[type="checkbox"] {
  width: 14px;
  height: 14px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* Progress */
.progress-bar {
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  transition: width var(--transition-normal);
}

/* Main Content */
.app-main {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  overflow: hidden;
}

.viewer-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.view-tabs {
  display: flex;
  gap: 2px;
}

.view-tab {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-tab:hover {
  color: var(--color-text);
  background: var(--color-surface-elevated);
}

.view-tab.active {
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

.view-tab:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Viewer Actions */
.viewer-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Window Controls */
.window-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
}

.window-input {
  width: 80px;
  max-width: 80px;
  padding: 3px 3px;
  font-size: 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  text-align: center;
  -moz-appearance: textfield;
}

.window-input::-webkit-outer-spin-button,
.window-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.window-input::placeholder {
  color: var(--color-text-muted);
  font-size: 0.65rem;
}

.window-controls .btn-sm {
  padding: 3px 8px;
  font-size: 0.65rem;
}

/* Dual Range Slider */
.range-slider-container {
  position: relative;
  width: 135px;
  height: 20px;
  display: flex;
  align-items: center;
}

.range-track {
  position: absolute;
  width: 100%;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  pointer-events: none;
  z-index: 1;
}

.range-selected {
  position: absolute;
  height: 4px;
  background: var(--color-primary);
  border-radius: 2px;
  pointer-events: none;
  z-index: 2;
}

.range-slider {
  position: absolute;
  width: 100%;
  height: 20px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  pointer-events: none;
  margin: 0;
  z-index: 3;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  pointer-events: auto;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  position: relative;
  z-index: 10;
}

.range-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  pointer-events: auto;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.range-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
}

.range-min { z-index: 4; }
.range-max { z-index: 3; }

/* Viewer Checkboxes */
.viewer-checkbox {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  cursor: pointer;
  white-space: nowrap;
}

.viewer-checkbox input[type="checkbox"] {
  width: 12px;
  height: 12px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* Viewer Canvas */
.viewer-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.viewer-canvas-wrapper {
  flex: 1;
  position: relative;
  background: #000;
  min-height: 0;
}

.viewer-canvas-wrapper canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}

/* Viewer Info Bar */
.viewer-info {
  padding: var(--space-xs) var(--space-md);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  font-size: 0.7rem;
  font-family: 'SF Mono', 'Consolas', monospace;
  color: var(--color-text-muted);
}

/* Console */
.console-container {
  height: 120px;
  flex-shrink: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.console-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.console-clear {
  font-size: 0.7rem;
  color: var(--color-text-dim);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.console-clear:hover {
  color: var(--color-text-muted);
}

.console-output {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-xs) var(--space-md);
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 0.7rem;
  line-height: 1.5;
}

.console-line {
  display: flex;
  gap: var(--space-md);
}

.console-time {
  color: var(--color-text-dim);
  flex-shrink: 0;
}

.console-message {
  color: var(--color-text-muted);
}

.console-message.success {
  color: var(--color-success);
}

.console-message.error {
  color: var(--color-error);
}

.console-message.warning {
  color: var(--color-warning);
}

/* Footer */
.app-footer {
  grid-column: 1 / -1;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xs) var(--space-lg);
  font-size: 0.65rem;
  color: var(--color-text-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Opacity Control */
.opacity-control {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-left: var(--space-sm);
}

.opacity-control input[type="range"] {
  width: 60px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--color-border);
  border-radius: 2px;
  cursor: pointer;
}

.opacity-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
}

.opacity-control input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

/* Disabled range input styles */
input[type="range"]:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

input[type="range"]:disabled::-webkit-slider-thumb {
  background: var(--color-text-muted);
  cursor: not-allowed;
}

input[type="range"]:disabled::-moz-range-thumb {
  background: var(--color-text-muted);
  cursor: not-allowed;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-surface);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-light);
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-text);
}

.modal-body {
  padding: var(--space-lg);
}

.modal-body p {
  margin-bottom: var(--space-md);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.modal-body p:last-child {
  margin-bottom: 0;
}

.modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* Stage Buttons Grid (Results sidebar) */
.stage-buttons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}

.stage-item {
  display: flex;
  gap: 2px;
}

.stage-item .stage-btn {
  flex: 1;
  padding: var(--space-xs);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-align: center;
}

.stage-item .stage-btn:hover {
  color: var(--color-text);
  border-color: var(--color-border-light);
}

.stage-item .stage-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-glow);
  border-color: var(--color-primary);
}

.stage-item .download-btn {
  padding: var(--space-xs);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  opacity: 0.6;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
}

.stage-item .download-btn:hover {
  opacity: 1;
  border-color: var(--color-border-light);
}

.stage-item .download-btn svg {
  width: 12px;
  height: 12px;
}

/* Model Checkbox Group */
.model-checkbox-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}

/* Responsive */
@media (max-width: 1024px) {
  .app-container {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto 1fr auto;
  }

  .app-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    max-height: 50vh;
  }
}

/* Header Links */
.header-links {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-link {
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: opacity 0.15s;
  opacity: 0.8;
  font-size: 0.85rem;
  font-weight: 500;
}

.header-link:hover {
  opacity: 1;
}

.header-link svg {
  display: block;
}

/* Colormap Select */
.colormap-select {
  width: auto;
  padding: var(--space-xs) var(--space-lg) var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
}

/* About Modal */
.about-modal {
  max-width: 480px;
}

.about-highlight {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
}

.about-highlight strong {
  font-size: 1.1rem;
  color: var(--color-primary);
  display: block;
  margin-bottom: 2px;
}

.about-highlight p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.4;
}

.about-modal-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 8px;
}

.about-modal h4 {
  font-size: 0.9rem;
  margin: var(--space-md) 0 var(--space-sm);
  color: var(--color-text);
}

.about-version-table {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.about-version-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface-elevated);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.about-version-label {
  color: var(--color-text-muted);
}

.about-version-value {
  color: var(--color-text);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

/* Privacy Modal */
.privacy-modal {
  max-width: 550px;
}

.privacy-highlight {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
}

.privacy-highlight strong {
  font-size: 1rem;
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--space-xs);
}

.privacy-highlight p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

.privacy-modal h4 {
  font-size: 0.9rem;
  margin: var(--space-md) 0 var(--space-xs);
  color: var(--color-text);
}

.privacy-modal p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0 0 var(--space-sm);
}

.privacy-list {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  padding-left: var(--space-lg);
  margin: 0 0 var(--space-sm);
}

/* Citations Modal */
.citations-modal {
  max-width: 700px;
  max-height: 80vh;
}

.citations-intro {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-lg) 0;
  line-height: 1.5;
}

.citation-section {
  margin-bottom: var(--space-lg);
}

.citation-section h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 var(--space-sm) 0;
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.citation-item {
  margin-bottom: var(--space-md);
  padding-left: var(--space-sm);
  border-left: 2px solid var(--color-border);
}

.citation-item:last-child {
  margin-bottom: 0;
}

.citation-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.citation-item p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0 0 4px 0;
  line-height: 1.4;
}

.citation-item em {
  font-style: italic;
}

.citation-item a {
  font-size: 0.75rem;
  color: var(--color-primary);
  text-decoration: none;
}

.citation-item a:hover {
  text-decoration: underline;
}

.citation-ref {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.citation-ref a {
  color: var(--color-primary);
  text-decoration: none;
}

.citation-ref a:hover {
  text-decoration: underline;
}

.citation-primary {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
}

.citation-primary .citation-item {
  margin-bottom: 0;
}

.citation-primary strong {
  font-size: 1.1rem;
  color: var(--color-primary);
}

.ref-list {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  line-height: 1.4;
}

.ref-list a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.ref-list a:hover {
  text-decoration: underline;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

.gap-sm {
  gap: var(--space-sm);
}

/* Muscle Legend */
#muscleLegend {
  border-bottom: none;
}

.legend-header {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.legend-list {
  max-height: 300px;
  overflow-y: auto;
  padding: var(--space-xs) var(--space-md) var(--space-md);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 2px 0;
  font-size: 0.7rem;
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.legend-name {
  flex: 1;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.legend-index {
  color: var(--color-text-dim);
  font-size: 0.6rem;
  flex-shrink: 0;
}

.legend-volume {
  color: var(--color-text-dim);
  font-size: 0.6rem;
  flex-shrink: 0;
  text-align: right;
  min-width: 50px;
}

.legend-empty {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

/* Metrics Summary */
.metrics-header {
  display: flex;
  gap: var(--space-md);
  justify-content: space-around;
}

.metrics-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metrics-stat-value {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-primary);
}

.metrics-stat-label {
  font-size: 0.55rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}