:root {
  --bg: #f0f4f8;
  --text: #1b2631;
  --muted: #64748b;
  --line: #cbd5e1;
  --card: rgba(255, 255, 255, 0.95);
  --card-strong: rgba(255, 255, 255, 0.98);
  --shadow: 0 12px 30px rgba(24, 37, 48, 0.08);
  --font-main: "Inter", "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --font-ui: "Outfit", sans-serif;
  --box-light: #6fb0cd;
  --box-main: #4a91b5;
  --box-dark: #377796;
  --box-border: rgba(15, 60, 80, 0.2);
  --wood-gradient: linear-gradient(90deg, #523321 0%, #704b34 50%, #523321 100%);
  --accent-blue: #4d90b3;
  --string-1: 1px;
  --string-2: 1px;
  --string-3: 1px;
  --string-4: 1.3px;
  --string-5: 1.6px;
  --string-6: 2px;
  --string-7: 2.4px;
  --string-8: 2.8px;
}