*{box-sizing:border-box;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}html,body,#root{color:#f8fafc;background:#0f172a;min-height:100%;margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{min-height:100vh;overflow-x:hidden}.option-section{flex-direction:column;gap:.6rem;display:flex}.option-section h3{color:#94a3b8;text-transform:uppercase;letter-spacing:.08em;margin:0;padding-left:.25rem;font-size:.85rem;font-weight:700}.options-btn{z-index:60;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0f172ad9;justify-content:flex-end;align-items:center;height:64px;padding:0 1rem;display:flex;position:fixed;top:0;left:0;right:0}.menu-btn{color:#f8fafc;cursor:pointer;background:#1e293b;border:1px solid #334155;border-radius:999px;place-items:center;width:48px;height:48px;display:grid}.menu-btn svg{width:26px;height:26px}main{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:2rem;min-height:100vh;padding:96px 1.25rem 2rem;display:flex}button{font:inherit;cursor:pointer;border:0;transition:transform .15s,background .15s,opacity .15s}button:active,.menu-btn:active,.interval:active,.speech-opt:active{transform:scale(.96)}main>div:first-child{justify-content:center;width:100%;display:flex}main button{aspect-ratio:1;color:#fff;background:linear-gradient(145deg,#22c55e,#16a34a);border-radius:999px;width:min(78vw,280px);font-size:2.2rem;font-weight:800;box-shadow:0 18px 40px #22c55e47}main button:last-child{background:linear-gradient(145deg,#ef4444,#dc2626);box-shadow:0 18px 40px #ef444447}main h2{color:#94a3b8;text-transform:uppercase;letter-spacing:.08em;margin:0 0 .5rem;font-size:1rem;font-weight:600}main h1{color:#f8fafc;margin:0;font-size:clamp(3rem,18vw,6rem);line-height:1}.options-menu{z-index:45;background:#0f172afa;flex-direction:column;gap:1rem;min-height:100dvh;padding:88px 1rem 2rem;display:flex;position:fixed;inset:0;overflow-y:auto}.options-menu>div:first-child{color:#f8fafc;text-align:center;cursor:pointer;background:#1e293b;border:1px solid #334155;border-radius:18px;padding:1rem;font-weight:700}.how-to-play-opt,.interval-repetition-opt{gap:.75rem;display:grid}.how-to-play-opt{grid-template-columns:1fr}.interval-repetition-opt{grid-template-columns:repeat(3,1fr)}.how-to-play-opt button,.interval-repetition-opt button,.speech-opt{color:#f8fafc;text-align:center;background:#1e293b;border:1px solid #334155;border-radius:16px;place-items:center;min-height:52px;padding:.85rem 1rem;font-weight:700;display:grid}.on{color:#fff!important;background:#2563eb!important;border-color:#60a5fa!important}.off{color:#94a3b8!important;background:#1e293b!important}.speech-opt.on{background:#16a34a!important;border-color:#4ade80!important}.speech-opt.off{background:#334155!important}.interval-list{z-index:100;background:#020617;align-content:start;gap:.75rem;margin:0;padding:1rem;list-style:none;display:grid;position:fixed;inset:0;overflow-y:auto}.close-list-btn{color:#f8fafc;cursor:pointer;background:#1e293b;border:1px solid #334155;border-radius:999px;place-items:center;width:48px;height:48px;margin-left:auto;font-size:1.5rem;font-style:normal;display:grid}.select-all-btn{color:#fff;background:#475569;border-radius:14px;width:100%;min-height:50px;font-weight:700}.interval{text-align:center;cursor:pointer;border:1px solid #334155;border-radius:14px;justify-content:center;align-items:center;min-height:52px;padding:.9rem 1rem;font-weight:700;display:flex}.interval.on{color:#fff!important;background:#2563eb!important;border-color:#60a5fa!important}.interval.off{color:#94a3b8!important;background:#1e293b!important}@media (width>=520px){main{padding-inline:2rem}.how-to-play-opt{grid-template-columns:repeat(3,1fr)}.options-menu{border-left:1px solid #334155;max-width:420px;left:auto}.interval-list{border-left:1px solid #334155;width:min(100%,440px);left:auto}}