*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f172a;--bg2:#1e293b;--bg3:#334155;--text:#f1f5f9;--text2:#94a3b8;--text3:#64748b;--border:#334155;--accent:#6366f1;--accent2:#4f46e5;--green:#22c55e;--amber:#f59e0b;--red:#ef4444;--radius:12px;--radius-sm:8px;--safe-top:env(safe-area-inset-top);--safe-bottom:env(safe-area-inset-bottom)}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100dvh;-webkit-font-smoothing:antialiased}*{-webkit-tap-highlight-color:transparent}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:opacity .15s,transform .1s}button:active{transform:scale(.97)}input{font-family:inherit;font-size:16px;background:var(--bg2);border:1px solid var(--border);color:var(--text);border-radius:var(--radius-sm);padding:12px 16px;width:100%;outline:none;transition:border-color .2s}input:focus{border-color:var(--accent)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:640px;margin:0 auto;padding:0 16px;padding-bottom:calc(24px + var(--safe-bottom))}.card-scene{perspective:1000px}.card-inner{position:relative;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.4,0,.2,1)}.card-inner.flipped{transform:rotateY(180deg)}.card-face{backface-visibility:hidden;-webkit-backface-visibility:hidden}.card-back{transform:rotateY(180deg)}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg3);border-radius:2px}@keyframes spin{to{transform:rotate(1turn)}}.spinner{width:20px;height:20px;border:2px solid var(--bg3);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}