:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1f1f1f;
  --muted: #6c6c6c;
  --accent: #0c6cf2;
  --accent-dark: #0a53b8;
  --border: #e1e1e5;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.app-header,
.app-footer {
  padding: 1.5rem;
  text-align: center;
}

.app-header h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.app-header p {
  color: var(--muted);
}

.app {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 0 1.5rem 3rem;
}

.camera-panel {
  background: var(--card);
  border-radius: 1.25rem;
  padding: 1rem;
  border: 1px solid var(--border);
}

.video-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 1rem;
  background: #111;
  aspect-ratio: 4 / 3;
}

#video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#captureCanvas {
  display: none;
}

.primary,
.secondary,
.copy,
.tab {
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
}

.primary {
  background: var(--accent);
  color: #fff;
}

.primary:hover {
  background: var(--accent-dark);
}

.secondary {
  background: #eef2ff;
  color: var(--accent-dark);
}

.copy {
  background: #f0f0f0;
  color: var(--text);
  margin-top: 0.25rem;
}

#captureButton {
  position: absolute;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
}

.status-bar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.preview-panel {
  background: var(--card);
  border-radius: 1.25rem;
  padding: 1rem;
  border: 1px solid var(--border);
  display: grid;
  gap: 1rem;
}

.swatch {
  width: 100%;
  height: 140px;
  border-radius: 1rem;
  background: linear-gradient(135deg, #dedede, #f7f7f7);
  border: 1px solid var(--border);
}

.color-readouts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.readout {
  background: #fafafa;
  border-radius: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  display: grid;
  gap: 0.35rem;
}

.readout h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.matches {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.match-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.mode-tabs {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

.tab {
  background: #e9e9ef;
  color: var(--text);
}

.tab.active {
  background: var(--accent);
  color: #fff;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.panel-card {
  background: var(--card);
  border-radius: 1.25rem;
  border: 1px solid var(--border);
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.5rem;
  font-weight: 600;
}

.field input,
.field select {
  padding: 0.65rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
}

.chart-definition {
  display: grid;
  gap: 0.75rem;
}

.chart-swatch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: #fafafa;
  font-size: 0.9rem;
}

.calibration-controls {
  display: grid;
  gap: 0.75rem;
}

.calibration-list,
#profileList {
  display: grid;
  gap: 0.75rem;
}

.calibration-item,
.profile-card {
  padding: 0.75rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: #fafafa;
  display: grid;
  gap: 0.35rem;
}

.profile-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.file-input {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: #f0f0f0;
  cursor: pointer;
}

.file-input input {
  display: none;
}

@media (min-width: 900px) {
  .app {
    max-width: 960px;
    margin: 0 auto;
  }

  .camera-panel,
  .preview-panel {
    padding: 1.5rem;
  }

  .status-bar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}