@import"https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+JP:wght@400;500;600;700&display=swap";:root{font-family:IBM Plex Sans JP,Hiragino Sans,Noto Sans,system-ui,sans-serif;line-height:1.5;font-weight:400;--color-bg-start: #f7f4f0;--color-bg-mid: #f2e4db;--color-bg-end: #f6ede7;--color-panel: #ffffff;--color-panel-soft: #f3f1ed;--color-border: #dcd7d2;--color-border-muted: #e0dcd6;--color-border-strong: #b1aaa4;--color-text: #2f2b27;--color-text-muted: #5c5854;--color-accent: #f7b500;--color-dark: #464646;--color-shadow: 0 10px 30px rgba(0, 0, 0, .08);--color-chart: #41B0FF;--color-chart-rgb: 65, 176, 255;--color-grid: #e1dbd4;--color-angle: #d6d0c8;--color-grid-outer: #222222;--bg: #ffffff;--color-note-line: #ece7e1;color:var(--color-text);background-color:var(--color-bg-start);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh;background:transparent}