@import "https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700;800;900&display=swap";:root{--bg:#f0f9ff;--fg:#1f2937;--muted:#6b7280;--border:#d1d5db;--card-bg:#f3f4f6;--card-bg-alt:#e5e7eb;--accent:#60a5fa;--accent-bg:#e5e7eb;--positive:#16a34a;--negative:#ef4444;--selected:#fed7aa;--red-card:#ef4444;--black-on-white:#000;--white-on-black:#fff}@media (prefers-color-scheme:dark){:root{--bg:#111827;--fg:#fff;--card-bg:#1f2937;--card-bg-alt:#374151;--border:#374151}}*,:before,:after{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0}body{background-color:var(--bg);width:100%;min-height:100vh;color:var(--fg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;flex-direction:column;justify-content:flex-start;align-items:center;padding-top:1rem;font-family:Noto Sans JP,sans-serif;line-height:1.6;transition:background-color .5s,color .5s;display:flex}nav{justify-content:space-between;align-items:center;width:100%;max-width:1024px;padding:0 1rem;display:flex}main{flex-grow:1}section{flex-direction:column;align-items:center;width:100%;max-width:1024px;padding:0 1rem;display:flex}.container{width:100%;max-width:1024px;margin:0 auto;padding:0 1rem}.text-center{text-align:center}h1,h2,h3{font-weight:800;line-height:1.2}h1{font-size:2.25rem}h3{font-size:1.5rem}a{color:inherit;text-decoration:underline}dialog:not([open]){pointer-events:none;opacity:0}dialog{color:var(--fg);background:0 0;border:none;margin:auto;display:grid;position:fixed;top:0;left:0}dialog>div{opacity:0;transform:scale(.75)}@media (prefers-reduced-motion:no-preference){dialog>div{transition:all .2s ease-in-out}dialog::backdrop{transition:all .5s}}dialog[open]>div{opacity:1;transform:scale(1)}dialog::backdrop{-webkit-backdrop-filter:blur();backdrop-filter:blur()}dialog[open]::backdrop{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}button{-webkit-user-select:none;user-select:none;color:inherit;font:inherit;background:0 0;border:none}button>*{cursor:inherit}button:enabled{cursor:pointer}button:disabled{opacity:.5}.text-fill-none{-webkit-text-fill-color:transparent}