/* Real Self - Mirror vs Reality Comparison */
/* Global Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-panel-mirror: linear-gradient(135deg, #2a1a4e, #1a1a2e);
  --bg-panel-real: linear-gradient(135deg, #1a2a4e, #1a1a2e);
  --accent-primary: #667eea;
  --accent-secondary: #764ba2;
  --accent-snap: linear-gradient(135deg, #f093fb, #f5576c);
  --text-primary: #ffffff;
  --text-secondary: #aaaaaa;
  --text-muted: #888888;
  --border-color: #333333;
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 25px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  line-height: 1.5;
}

/* Header */
.app-header {
  text-align: center;
  margin-bottom: 20px;
}

.lang-switch {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.lang-btn {
  padding: 6px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.lang-btn.active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: var(--text-primary);
  border-color: transparent;
}

.app-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 500px;
}

/* Shortcut Hints */
.shortcut-hints {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  color: var(--text-muted);
  font-size: 0.75rem;
  flex-wrap: wrap;
}

.hint-label {
  font-weight: 600;
  color: var(--accent-primary);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 4px;
}

.hint-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.hint-dot {
  opacity: 0.4;
}

.shortcut-hints kbd {
  display: inline-block;
  padding: 1px 5px;
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
  background: rgba(102, 126, 234, 0.15);
  border: 1px solid rgba(102, 126, 234, 0.3);
  border-radius: 5px;
}

/* Controls */
.controls {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  justify-content: center;
  position: relative;
}

.btn {
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  font-weight: 600;
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.5);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: var(--text-primary);
}

.btn-primary:hover:not(:disabled) {
  transform: scale(1.05);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

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

.btn-secondary:hover:not(.active) {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.btn-secondary.active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: var(--text-primary);
  border-color: transparent;
}

.btn-snap {
  background: var(--accent-snap);
  color: var(--text-primary);
}

.btn-snap:hover {
  transform: scale(1.05);
}

/* Container & Panels */
.container {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  max-width: 1200px;
  width: 100%;
}

.panel {
  flex: 1;
  min-width: 280px;
  max-width: 560px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base);
}

.panel:hover {
  transform: translateY(-2px);
}

.panel-header {
  padding: 14px 20px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-header .icon {
  font-size: 1.3em;
}

.panel-header.mirror {
  background: var(--bg-panel-mirror);
}

.panel-header.real {
  background: var(--bg-panel-real);
}

.video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #000;
  overflow: hidden;
}

.video-wrap video,
.video-wrap canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-mirror {
  transform: scaleX(-1);
}

.panel-footer {
  padding: 12px 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 4 / 3;
  color: #555;
  font-size: 1rem;
  flex-direction: column;
  gap: 10px;
}

.placeholder .big-icon {
  font-size: 3em;
}

.error-state {
  display: none;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 4 / 3;
  color: #ff6b6b;
  font-size: 1rem;
  flex-direction: column;
  gap: 14px;
  text-align: center;
  padding: 20px;
}

.error-state .big-icon {
  font-size: 3em;
}

.error-state span:not(.big-icon) {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Slider Mode */
.slider-container {
  position: relative;
  width: 100%;
  max-width: 700px;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: none;
  cursor: ew-resize;
  background: #000;
}

.slider-container canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.slider-mirror {
  clip-path: inset(0 50% 0 0);
}

.slider-real {
  clip-path: inset(0 0 0 50%);
}

.slider-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 3px;
  height: 100%;
  background: var(--text-primary);
  pointer-events: none;
  z-index: 10;
}

.slider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  background: var(--text-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2em;
  z-index: 11;
  cursor: ns-resize;
  touch-action: none;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  color: var(--bg-primary);
}

.slider-labels {
  position: absolute;
  top: 12px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 5;
  pointer-events: none;
}

.slider-labels span {
  background: rgba(0, 0, 0, 0.6);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Snapshot Preview */
.snap-preview {
  display: none;
  margin-top: 24px;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.snap-preview.visible {
  display: flex;
}

.snap-item {
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-fast);
}

.snap-item:hover {
  transform: translateY(-4px);
}

.snap-item canvas {
  border-radius: 8px;
  max-width: 260px;
  display: block;
}

.snap-item p {
  margin-top: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
}

.btn-download {
  margin-top: 10px;
  padding: 6px 16px;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: var(--text-primary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-download:hover {
  transform: scale(1.05);
}

.btn-download:active {
  transform: scale(0.97);
}

/* Footer */
.app-footer {
  margin-top: auto;
  padding: 24px 20px 8px;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
  .app-title {
    font-size: 1.4rem;
  }

  .controls {
    gap: 8px;
  }

  .btn {
    padding: 8px 18px;
    font-size: 0.875rem;
  }

  .container {
    gap: 12px;
  }

  .panel {
    min-width: 100%;
    max-width: 100%;
  }

  .slider-container {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  body {
    padding: 12px;
  }

  .app-title {
    font-size: 1.2rem;
  }

  .panel-header {
    padding: 12px 16px;
    font-size: 0.9rem;
  }
}

/* Toast Notifications */
.controls .toast-container {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  align-items: flex-end;
  width: max-content;
  max-width: 300px;
}

.toast {
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: #ffffff;
  background: rgba(10, 10, 20, 0.95);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transform: translateX(10px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  text-align: right;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast.toast-success {
  border-color: #66ea7e;
  background: rgba(10, 20, 10, 0.95);
}

.toast.toast-warning {
  border-color: #ffc864;
  background: rgba(26, 20, 10, 0.95);
}

.toast.toast-error {
  border-color: #ff6464;
  background: rgba(26, 10, 10, 0.95);
}

.toast.toast-info {
  border-color: #667eea;
  background: rgba(10, 10, 26, 0.95);
}

@media (max-width: 768px) {
  .controls .toast-container {
    position: fixed;
    top: 20px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    align-items: center;
  }

  .toast {
    text-align: center;
    white-space: normal;
    min-width: 200px;
  }
}