:root {
  color-scheme: light dark;
  --bg: #f4f5f8;
  --panel: #ffffff;
  --accent: #376df5;
  --accent-soft: rgba(55, 109, 245, 0.1);
  --border: #d7dae0;
  --text: #1c2233;
  --muted: #5a6275;
  --danger: #c92a2a;
  font-family: "Segoe UI", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
}

.top-bar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand h1 {
  font-size: 1.6rem;
  margin: 0;
}

.brand .dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.content {
  padding: 2rem 2.5rem 3rem;
  display: grid;
  gap: 1.5rem;
}

.panel {
  background: var(--panel);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 1.75rem;
  box-shadow: 0 12px 24px rgba(17, 24, 39, 0.08);
}

.panel.upload {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.file-picker {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

.file-picker input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

#submit-button {
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

#submit-button:disabled {
  background: #c9d4ff;
  cursor: not-allowed;
}

#submit-button:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(55, 109, 245, 0.28);
}

.status {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.viewer {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: flex-start;
}

.stage-wrapper {
  width: 100%;
  overflow: auto;
  padding: 0.5rem;
  background: #0d1117;
  border-radius: 12px;
}

#image-stage {
  position: relative;
  display: inline-block;
  max-width: 100%;
}

#preview {
  display: block;
  max-width: min(100%, 960px);
  border-radius: 8px;
}

.face-box {
  position: absolute;
  border: 3px solid rgba(55, 109, 245, 0.95);
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(55, 109, 245, 0.35);
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.face-box::after {
  content: attr(data-index);
  position: absolute;
  top: -1.75rem;
  left: 0;
  background: rgba(55, 109, 245, 0.9);
  color: white;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.metrics h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.metrics ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.35rem;
}

.metrics li {
  list-style: none;
  font-size: 0.95rem;
  color: var(--muted);
}

.metrics li strong {
  color: var(--text);
}

.warnings {
  border-left: 3px solid var(--danger);
  padding-left: 1rem;
  color: var(--danger);
}

.warnings ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.raw header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.raw pre {
  margin: 0;
  background: #0d1117;
  color: #e4ecff;
  border-radius: 12px;
  padding: 1rem 1.25rem;
  max-height: 420px;
  overflow: auto;
  font-size: 0.87rem;
}

#toggle-json {
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
  font-weight: 600;
}

footer {
  margin-top: auto;
  padding: 1.5rem 2.5rem 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 1024px) {
  .viewer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .content {
    padding: 1.2rem;
  }

  .top-bar {
    padding: 1.2rem;
  }

  .panel {
    padding: 1.2rem;
  }

  .form {
    flex-direction: column;
    align-items: stretch;
  }

  #submit-button,
  .file-picker span {
    width: 100%;
    text-align: center;
  }
}
.status.ok {
  color: #1b8837;
}

.status.error {
  color: var(--danger);
}

.status.loading {
  color: var(--accent);
}
.metrics-grid {
  display: grid;
  gap: 1rem;
}

.metrics-grid ul {
  margin: 0;
  padding-left: 1.1rem;
  list-style: none;
  display: grid;
  gap: 0.35rem;
}

.metrics-grid li {
  font-size: 0.92rem;
  color: var(--muted);
}

.metrics-grid li strong {
  color: var(--text);
}
.diagnostics {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  color: var(--accent);
}

.diagnostics ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}