:root.light{--bg:#FAFAFA;--text:#333333;--text-soft:#999999;--card:#FFFFFF;--accent:#246BEB;--accent-soft:#EEF4FF;--border:#DDD;--error:#FF3B30;--button-light:#EEF4FF;--button-text:#FFFFFF}:root.dark{--bg:#121212;--text:#FFFFFF;--text-soft:#999999;--card:#333333;--accent:#246BEB;--accent-soft:#EEF4FF;--border:#444;--error:#FF453A;--button-light:#246BEB;--button-text:#FFFFFF}body,html{background:var(--bg);color:var(--foreground);font-family:Arial,Helvetica,sans-serif;transition:background .3s ease,color .3s ease;max-width:100vw;overflow-x:hidden}a{color:var(--accent);text-decoration:none}*{box-sizing:border-box;padding:0;margin:0}@keyframes bounce-scale{0%{transform:scale(1)}50%{transform:scale(1.15)}to{transform:scale(1)}}.bounce-scale{animation:bounce-scale .25s ease}.extension{margin-top:3rem;margin-bottom:3rem;font-size:1rem;line-height:1.75;color:var(--text)}.extension h2{font-size:1.5rem;margin-top:2.5rem;margin-bottom:1rem;font-weight:600;color:var(--text);display:flex;align-items:center;gap:.5rem}.extension ul{padding-left:1.5rem;margin-bottom:1.5rem}.extension ul li{margin-bottom:.5rem}.extension .qa{margin-bottom:1.5rem}.extension .qa .q{font-weight:600;color:var(--text);margin-top:1rem}.extension .qa .a{color:var(--text-soft);margin-top:.2rem}.extension .highlight{background:var(--blueSoft);padding:.75rem 1rem;border-radius:12px;border:1px solid var(--border);margin-top:1rem;margin-bottom:2rem}.en-translation{font-style:italic;color:var(--text-soft)}.voice-phrases{display:none}.download-cta{background:var(--card);padding:2rem 1.5rem;border-radius:16px;border:1px solid var(--border);box-shadow:0 4px 12px rgba(0,0,0,.05);margin:3rem auto;max-width:600px;text-align:center}