*{box-sizing:border-box;margin:0;padding:0}body{font-family:Helvetica Neue,Arial,Hiragino Kaku Gothic ProN,Hiragino Sans,Meiryo,sans-serif;background-color:#f5f7fa;color:#333;line-height:1.6}main{max-width:900px;margin:0 auto;padding:24px 16px}h1{font-size:1.6rem;margin-bottom:8px}h1,h2{color:#1a1a2e}h2{font-size:1.2rem;margin-bottom:12px}.card{background:#fff;border-radius:8px;padding:20px;box-shadow:0 2px 8px rgba(0,0,0,.08);margin-bottom:16px}.btn-primary{background-color:#1a1a2e;color:#fff;border:none;border-radius:6px;padding:10px 24px;font-size:1rem;cursor:pointer;transition:background .2s}.btn-primary:hover{background-color:#2d2d4e}.btn-primary:disabled{background-color:#aaa;cursor:not-allowed}.btn-danger{background-color:#e53e3e;color:#fff;border:none;border-radius:6px;padding:6px 16px;font-size:.875rem;cursor:pointer;transition:background .2s}.btn-danger:hover{background-color:#c53030}.loading{color:#666;font-style:italic}input[type=email],input[type=text]{border:1px solid #d1d5db;border-radius:6px;padding:8px 12px;font-size:1rem;width:100%;outline:none;transition:border-color .2s}input[type=email]:focus,input[type=text]:focus{border-color:#1a1a2e}