:root{--bg-color: #050505;--surface-color: #121212;--primary-color: #a855f7;--secondary-color: #3b82f6;--text-primary: #ffffff;--text-secondary: #a1a1aa;--success: #22c55e;--warning: #eab308;--error: #ef4444;--font-main: "Inter", system-ui, -apple-system, sans-serif;--font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-main);background-color:var(--bg-color);color:var(--text-primary);line-height:1.5;overflow-x:hidden;overscroll-behavior-y:none}input,button{font-family:inherit;border:none;outline:none}.container{max-width:600px;margin:0 auto;padding:2rem 1.5rem;padding-top:max(2rem,env(safe-area-inset-top));padding-bottom:max(2rem,env(safe-area-inset-bottom));min-height:100vh;display:flex;flex-direction:column}.card{background:var(--surface-color);border-radius:24px;padding:2rem;box-shadow:0 4px 20px #0006;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.05)}.text-jp{font-family:var(--font-jp)}.btn{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;padding:1rem 2rem;border-radius:99px;font-weight:600;font-size:1.1rem;cursor:pointer;transition:transform .2s,box-shadow .2s;text-align:center;box-shadow:0 4px 15px #a855f766}.btn:active{transform:scale(.96)}.input-field{width:100%;background:#ffffff0d;border:2px solid rgba(255,255,255,.1);color:#fff;padding:1rem;border-radius:12px;font-size:1.2rem;text-align:center;transition:border-color .3s}.input-field:focus{border-color:var(--primary-color)}.fade-in{animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}