:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --primary-light: #ecfdf5;

  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;

  --border-light: #e5e7eb;
  --border-medium: #d1d5db;

  --bg-body: #f9fafb;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --transition: all 0.2s ease;
}

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

body {
  font-family:
    "Poppins",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  max-width: 420px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-lg);
}

.header {
  padding: 1rem 1.25rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.logo i {
  color: var(--primary);
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.625rem;
  background-color: var(--bg-body);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-muted);
  transition: var(--transition);
}

.status-dot.active {
  background-color: var(--primary);
  animation: pulse 2s ease-in-out infinite;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1.25rem;
}

.camera-section {
  width: 100%;
}

.camera-container {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.camera-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  background-color: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.camera-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.camera-wrapper .hidden {
  display: none !important;
}

.camera-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: #666;
}

.camera-placeholder.hidden {
  display: none !important;
}

.camera-placeholder i {
  opacity: 0.5;
}

.camera-placeholder p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.camera-overlay {
  position: absolute;
  inset: 0;
  display: none;
  pointer-events: none;
}

.camera-overlay.active {
  display: block;
}

.overlay-frame {
  position: absolute;
  inset: 18%;
  border: 2px dashed var(--primary);
  border-radius: var(--radius-md);
  opacity: 0.7;
}

.camera-controls {
  display: flex;
  justify-content: center;
  margin-top: -1.5rem;
  position: relative;
  z-index: 10;
}

.capture-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 3px solid var(--bg-surface);
  background: var(--primary);
  color: white;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.capture-btn:hover {
  transform: scale(1.05);
  background: var(--primary-dark);
}

.capture-btn:active {
  transform: scale(0.95);
}

.capture-btn.scanning {
  background: #ef4444;
}

.settings-bar {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem;
  background-color: var(--bg-body);
  border-radius: var(--radius-md);
}

.setting-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

.setting-item select {
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  font-size: 0.8125rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.375rem 0.5rem;
  font-family: inherit;
  outline: none;
  border-radius: var(--radius-sm);
  flex: 1;
}

.fps-setting {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.375rem 0.5rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

#fps-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 45px;
}

input[type="range"] {
  flex: 1;
  height: 3px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border-medium);
  border-radius: 2px;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.tone-setting {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.5rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.tone-setting i {
  color: var(--text-secondary);
}

.tone-setting select {
  border: none;
  background: transparent;
  font-size: 0.8125rem;
  color: var(--text-primary);
  cursor: pointer;
  outline: none;
  flex: 1;
}

.tone-setting select:focus {
  color: var(--primary);
}

.results-section {
  flex: 1;
}

.result-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.idle-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
}

.idle-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  background-color: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.idle-card h2 {
  font-size: 1.125rem;
  margin-bottom: 0.375rem;
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.idle-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 240px;
  margin: 0 auto;
}

.loading-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
}

.loading-animation {
  position: relative;
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
}

.loading-ring {
  position: absolute;
  inset: 0;
  border: 2.5px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.loading-card h2 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.loading-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.result-main {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.detected-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.625rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  align-self: center;
}

.fun-fact-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1rem;
  position: relative;
}

.fun-fact-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.fun-fact-text {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.6;
  padding-right: 2.25rem;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.375rem;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.copy-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.copy-btn.copied {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.fun-fact-loading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
}

.fun-fact-loading.hidden {
  display: none;
}

.fun-fact-loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.fun-fact-loading span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.confidence-bar {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-body);
  border-radius: var(--radius-sm);
}

.confidence-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 65px;
}

.confidence-track {
  flex: 1;
  height: 6px;
  background-color: var(--border-light);
  border-radius: 3px;
  overflow: hidden;
}

.confidence-fill {
  height: 100%;
  background-color: var(--primary);
  border-radius: 3px;
  transition: width 0.4s ease;
}

.confidence-value {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  min-width: 36px;
  text-align: right;
}

.share-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.375rem;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.footer {
  padding: 0.875rem;
  text-align: center;
  border-top: 1px solid var(--border-light);
  background: var(--bg-surface);
}

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

.hidden {
  display: none !important;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fadeIn {
  animation: fadeIn 0.5s ease-out forwards;
}

@media (max-width: 480px) {
  .app-container {
    max-width: 100%;
  }
}

@media (min-width: 768px) {
  .app-container {
    max-width: 440px;
    margin: 1.5rem auto;
    min-height: calc(100vh - 3rem);
    border-radius: var(--radius-lg);
  }

  .main-content {
    padding: 1.5rem;
  }

  .camera-wrapper {
    aspect-ratio: 16/10;
  }

  .capture-btn {
    width: 64px;
    height: 64px;
  }
}