:root {
  --bg: #ffffff;
  --fg: #111111;
  --border: #dddddd;
  --safe: #2ecc71;
  --caution: #f1c40f;
  --risk: #e74c3c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

header {
  padding: 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.subtitle {
  margin: 6px 0 0;
  font-size: 14px;
  opacity: 0.85;
}

#tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab {
  flex: 1;
  padding: 12px;
  background: #f8f8f8;
  border: none;
  cursor: pointer;
}

.tab.active {
  background: #ffffff;
  font-weight: 700;
  border-bottom: 2px solid var(--fg);
}

.panel {
  display: none;
  padding: 16px;
  max-width: 920px;
  margin: 0 auto;
}

.panel.active { display: block; }

textarea {
  width: 100%;
  height: 140px;
  margin-bottom: 12px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.4;
}

button {
  padding: 10px 14px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
  cursor: pointer;
}

button:hover { background: #fafafa; }

.ocr-block {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.ocr-block input[type="file"] {
  flex: 1;
}

.result-card {
  padding: 12px;
  border: 1px solid var(--border);
  margin-bottom: 8px;
  border-radius: 10px;
}

.result-safe { border-left: 6px solid var(--safe); }
.result-caution { border-left: 6px solid var(--caution); }
.result-risk { border-left: 6px solid var(--risk); }

.small {
  font-size: 12px;
  opacity: 0.85;
}

footer {
  padding: 16px;
  text-align: center;
  border-top: 1px solid var(--border);
  margin-top: 12px;
  font-size: 12px;
  opacity: 0.8;
}