:root {
  --bg: #ffffff;
  --bg-soft: #f9fafb;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --muted2: #4b5563;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans JP", "Hiragino Sans", "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
}

.nw-header {
  padding: 16px 12px 10px;
  border-bottom: 1px solid var(--border);
}
.nw-header h1 { margin: 0; font-size: 22px; letter-spacing: 0.2px; }
.subtitle { margin: 6px 0 0; font-size: 12px; color: var(--muted); }

.nw-main {
  max-width: 600px;
  margin: 0 auto;
  padding: 12px;
}

.ad-slot {
  margin: 12px 0 16px;
  padding: 8px;
  border: 1px dashed #d4d4d4;
  font-size: 11px;
  color: #9ca3af;
  text-align: center;
  min-height: 60px;
}

.nw-lang-switch {
  margin-top: 10px;
  font-size: 11px;
  color: var(--muted);
}
.nw-lang-switch button {
  border: 1px solid #d1d5db;
  background: #fff;
  padding: 4px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 11px;
  color: var(--muted2);
}
.nw-lang-switch button.active {
  font-weight: 700;
  background: var(--bg-soft);
}

.nw-donate {
  text-align: center;
  margin: 16px 0 8px;
  padding: 8px 0;
  font-size: 12px;
  color: var(--muted);
}
.nw-donate-text { margin: 4px 0; }
.nw-donate-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.nw-donate-links a {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  background: #fff;
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  transition: all 0.15s ease;
}
.nw-donate-links a:hover { background: var(--bg-soft); transform: translateY(-1px); }

.nw-links {
  text-align: center;
  margin: 18px 0 0;
  font-size: 12px;
  color: var(--muted);
}
.nw-links a { color: var(--muted2); text-decoration: underline; }
.nw-links a:hover { opacity: 0.8; }

.nw-footer {
  margin-top: 24px;
  padding: 16px 8px 12px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}
.nw-footer-line { margin: 2px 0; }

.symbol-picker p { margin: 10px 0 8px; font-size: 14px; }

/* カテゴリタブ */
.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 10px 0 12px;
}
.cat-tab {
  border: 1px solid #d1d5db;
  background: #fff;
  padding: 8px 10px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 12px;
  color: var(--muted2);
}
.cat-tab.active {
  background: var(--bg-soft);
  font-weight: 700;
  border-color: #cbd5e1;
}

/* 検索 */
.search-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 8px 0 12px;
}
.search-row input[type="search"]{
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 14px;
  background: #fff;
}
.search-all {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted2);
  user-select: none;
}
.search-all input { width: 16px; height: 16px; }

/* グリッド */
.symbol-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 10px;
}

/* 記号ボタン：SVGを中央に */
.symbol-btn {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 12px;
  padding: 12px 0;
  cursor: pointer;
}
.symbol-btn:hover { background: var(--bg-soft); }
.symbol-btn:active { transform: translateY(1px); }

.symbol-ico {
  width: 44px;
  height: 44px;
  display: block;
  margin: 0 auto;
  color: #111827;
}
.symbol-caption {
  margin-top: 6px;
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  line-height: 1.2;
}

.result {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
}
.result h2 { margin: 0 0 8px; font-size: 14px; }
.result-summary { font-weight: 700; margin: 0 0 6px; }
.result-detail { margin: 0; font-size: 13px; color: var(--muted2); }

.hidden { display: none; }

/* OCR ベータ */
.ocr-box { margin-top: 14px; }
.ocr-box details {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
  background: #fff;
}
.ocr-box summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
}
.ocr-note { margin: 10px 0 8px; font-size: 12px; color: var(--muted2); }
.ocr-controls { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.ocr-controls input[type="file"] { font-size: 12px; }
.ocr-controls button {
  border: 1px solid #d1d5db;
  background: #fff;
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
}
.ocr-preview img {
  max-width: 100%;
  display: none;
  margin-top: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.ocr-candidates { margin-top: 12px; }
.ocr-cand-title { font-size: 12px; font-weight: 700; margin-bottom: 8px; }
.ocr-cand-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.ocr-cand {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 0;
  background: #fff;
  cursor: pointer;
}
.ocr-cand:hover { background: var(--bg-soft); }
.ocr-score {
  margin-top: 6px;
  font-size: 11px;
  color: var(--muted);
  text-align: center;
}

/* 空表示 */
.nw-empty{
  grid-column: 1 / -1;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--muted2);
  background: #fff;
  font-size: 13px;
}

@media (max-width: 480px) {
  .symbol-grid { grid-template-columns: 1fr; }
  .ocr-cand-grid { grid-template-columns: 1fr; }
  .search-row { flex-direction: column; align-items: stretch; }
  .search-all { justify-content: flex-start; }
}